Shaped inner seals for tires and their fabrication
SUBSTANCE: invention relates to automotive industry, particularly to inner seal design and fabrication. Said inner seal comprises dynamically cured mix of elastomer and structural resin, said inner seal being shaped.
EFFECT: better sealing properties.
22 cl, 3 dwg, 1 tbl
Field of the invention
The present invention relates to internal spacers for tires and particularly to konturirovany inner liners for tires comprising a dynamically vulcanized mixture based elastomers and process for their preparation for the manufacture of a component of the tire.
Background of the establishment of the present invention
The inner strip for pneumatic tires are important to the overall operational characteristics of the tires. The use of materials, which are characterized by lower permeability, can reduce the caliber of the inner strip, which in turn increases fuel efficiency. Such properties can be ensured with the use of new technology and dynamically vulcanized blends (DVA). Getting film DVA by extrusion-blow process is a technology of obtaining a sealing film which comprises a dynamically vulcanized blend of elastomer and thermoplastic. An example of this technology is described in the article Tracey and Tsou, "Dynamically Vulcanized Alloy Innerliners" Rubber in the book World, cc. 17-21 (1 September 2007).
Contoured internal gaskets are of great importance for tires, especially for tires with a high aspect ratio of the tire to its width, in the process of conducting the stage of molding of the tire when assembling the frame tires. At that stage �of imovane strip is stretched at the center line and shoulders. To compensate, the Central line and the respective shoulder areas of the inner strips are not manufactured from this mixture, use a higher caliber, thus ensuring a uniform calibre in the final cured tire.
However, the inner strip DVA are usually made using a method of obtaining films by extrusion-blow process, and they are characterized by the tendency of formation of uniform caliber, which leads to loss of the circuit is not vulcanized tire. When carrying out the stage of molding, the inner strip DVA, as a rule, are stretched unevenly on the drum for assembling tire, especially in the shoulder area and the Central line in the internal lining of the cured tire with uneven caliber. A narrower scope, for example, in the shoulder area and at the center line, are more sensitive to increased air permeability, therefore it is possible to accelerate the oxidation and aging of internal rubber components of the tire. Accordingly, a need exists konturirovannyh internal DVA strips that provide improved sealing properties, are characterized by improved mechanical or immutable properties, and uniform calibre in the final cured tire.
Brief description �usnote of the invention
The present invention relates to the sealing tapes that can be used as inner liners for tires comprising a dynamically vulcanized blend of an elastomer and a structural resin, the film is contoured.
The present invention also relates to articles, particularly tires, made from konturirovannyh internal linings for buses. The tire includes an inner lining, characterized by a substantially uniform caliber.
The present invention relates also to a method of producing the sealing film and/or the inner strip for tires, which is what made konturirovannuû internal lining for tires that includes a dynamically vulcanized blend of elastomers and structural resins.
The present invention relates also to method, which additionally includes the following stages: (i) the manufacture of seamless inner lining for bus, characterized by a substantially uniform calibre, with seamless internal lining is obtained in the form of a sleeve, where seamless inner padding for bus comprises a dynamically vulcanized blend of an elastomer and a structural resin, (ii) stretching seamless inner strip to the tire in at least one for�flax and axial direction, and (iii) the manufacture of contoured inner strip for bus.
The present invention relates also to methods of manufacturing pneumatic tires that are that are made konturirovannuû internal lining for bus, konturirovany inner padding for bus comprises a dynamically vulcanized blend of elastomers and structural resins.
Brief description of figures
Fig.1 shows a typical cross section of the tire.
Fig.2 shows a typical cross section of the inner strips of the present invention.
Fig.3 shows the curve of the caliber of typical internal gaskets DVA made of a film obtained by the method of irrigation.
Detailed description of the invention
The present invention describes various specific variants of implementation, modifications and examples of the present invention, including preferred options for implementation and definitions that are used in this context in order to explain the claimed invention. Although illustrative options are described in detail, it should be understood that specialists in this field of technology are obvious various other modifications can be made without leaving the scope and essence of the present invention. With regard to the infringement of patent rights, the scope of the term "invention" �functionality of any one or more provisions of the attached formula of the present invention, including their equivalents, and elements or limitations that are equivalent to the quoted paragraphs.
Below is the definition used in the description of the present invention.
Rubber refers to any polymer or composition of polymers in accordance with the definition of the American society for testing and materials (ASTM) D156: "material that is able to recover from large deformations, and which can be converted or which have been converted into a state in which it is substantially insoluble (but can swell) in boiling solvent...". In addition, rubber is an amorphous material. Elastomer denotes a term that can be used interchangeably with the term rubber. The elastomeric composition refers to any composition comprising at least one elastomer as defined above.
Vulcanized rubber mixture according to the ASTM D1566, denotes a crosslinked elastomeric material obtained elastomer subjected to significant deformation under the action of a weak force that can quickly and effectively restore approximately the original size and shape upon removal of the deforming force." Utverjdena vulcanized composition means any elastomeric composition, which has been overide�Oia and/or contains or obtained with the use of an effective amount of a curing agent or a curing complex, and is the term used interchangeable with the term "vulcanized rubber compound".
The term "parts/100 parts of rubber" or "parts" denotes the number of mass parts, per hundred parts rubber, and is an accepted measure in the art, where the content of the components of the composition is determined by mass relative to the mass of all elastomeric components. The total number of parts/100 parts of rubber or the number of parts of all components of the rubber, where one, two, three or more different compounds of rubber present in the composition taken as 100 parts of rubber. The mass concentrations of all other non-rubber components of lead per 100 parts of rubber is expressed as the number of parts/100 parts of rubber. This way you can easily compare, for example, levels of agents to cure or fillers, etc. in various compositions based on the same relative content of rubber without the necessity of re-calculation of mass percentage of each component after changing the contents of only one or more component(s).
The term "alkyl" denotes a hydrocarbon of the paraffin group, which can be obtained from alkane when removing one or more hydrogen atoms from the structure, such as, for example, methyl group (CH3) or ethyl group (CH3CH2) � etc.
The term "aryl" means a hydrocarbon group which forms a cyclic structure characteristic of aromatic compounds, such as, for example, benzene, naphthalene, phenanthrene, anthracene, etc., and, as a rule, contains in its structure of alternating double bond (unsaturated site"). Thus, the aryl group is a group derived from aromatic compounds during removal from the structure of one or more hydrogen atoms, such as, for example, phenyl or C6H5.
The term "substitution" refers to substituting at least one hydrogen atom in a chemical compound or fragment. Thus, for example, "substituted" styrene fragment includes a pair of methylsterol, para-atillery, etc.
Used in this context, the term "wt.%" denotes mass percentage, "mol%" means mole percent, "vol.%" means volume percent, wherein all molecular masses are indicated in units of g/mol, unless otherwise indicated.
Konturirovany inner padding DVA
The present invention offers a contoured inner strip DVA and methods for their preparation, particularly for tires. The inner strip DVA, manufactured using modern technology, are characterized by a substantially uniform caliber. Used in Danno� context, the term "substantially uniform caliber" means, what caliber changes are less than 25% (preferably less than 20%, preferably less than 15%, or preferably less than 10%). Film thickness determined by the method described in standard ASTM D374-94. The variation of the film thickness are determined with the help of the device Measuretech series 200. The specified device allows to determine the film thickness using the device for the capacitive measurement method. For each film sample is determined ten thicknesses 1 inch of the film as the film passes through the device in the transverse direction. To determine the deviation of the thickness using three sample films. Deviation of the width determined by dividing the full range of values of the film thickness (maximum value minus minimum value) to the average thickness value and dividing the result by two. Thickness changes are in percent change relative to the mean value.
During the process of assembling the tire, the inner lining, characterized by a substantially uniform caliber, is placed on the drum for the Assembly and the drum pushing toroidal, wherein the inner strip is subjected to uneven stretching. To the greatest extent stretched tire at the center line and shoulders. Accordingly, inner padding DVA becomes in these zones over the�coy, and the final bus contains internal lining DVA, characterized by a nonuniform diameter. Specified uneven caliber can be seen as a disadvantage. Uneven caliber of the inner strip in the tire can lead to a more rapid penetration of air through a thinner area of the inner strip, which, in turn, can lead to increased oxidation and excessive aging of the internal rubber components of the tire.
In contrast, in embodiments of the present invention offers the inner strip for tires comprising a dynamically vulcanized blend of an elastomer and a structural resin, and the inner padding is contoured. Preferably contoured inner strip DVA provide increased air tightness due to the normalization of the gauge with uneven stretching that occurs during Assembly of the tire, thus utverjdena the tire includes an inner gasket DVA, characterized by a more uniform caliber. Contoured sealing film or the inner strip DVA, and articles made of them, including tires, are described below. Methods of obtaining these konturirovannyh products are also described below.
Used in this context, the term "contoured" means ed�Leah, characterized by uneven caliber. Used in this context, the term "irregular" refers to the caliber of the inner strip, the thickness of which in the widest and the narrowest parts differ by more than 25.0% (preferably more than 50,0%, more than 75%, or more than 100,0%). Grooves of the inner strip vary depending on the size of tires that the manufacturer and the requirements to the performance characteristics of the tire. For example, gaskets for truck tires typically are characterized by a thickness equal to approximately 2.0 mm, and their thickness can vary from approximately 1.8 mm to approximately 2.5 mm. on the other hand, strip tires for passenger transport are usually characterized by a thickness of approximately 1.0 mm, while the thickness may vary from about 0.6 mm to about 1.2 mm.
For simplicity, the contour of the inner strip for bus described relative to its position in the destination bus. Fig.1 shows a cross section of a typical tire. Of particular importance in the context of the present invention has an internal spacer (1), the side of the tyre (2), the toe of the bead (3), the heel of the bead (4), a sidewall (5) and breaker (6). Size, which is also applicable to the present invention, include shoulder area (7), the maximum width of the broker (half of sirinevler shown as item 8), the height of the tire (9) and a shoulder (10). The shoulder is considered the mid point of the shoulder area, which, as a rule, removed from the center line by approximately 50% of the maximum width of the belt.
Although the contour of the inner strip is discussed in relation to its final position in the tire, the specialist in the art it is obvious that the contour of the inner strip is formed before the process of Assembly of the tire. For example, thickening, approximately 30.0% of the width of the belt, located on either side of the Central line, indicates that before the process of assembling the tire in contoured inner lining wider part of the circuit is removed by approximately 30.0% of the required width of the broker in the destination bus, during the process of assembling the tire to approximately the Central point of the inner strip is located on the center line of the tire.
The contour of the inner strip of the present invention preferably disappears during the process of assembling the tire, get the tire that contains internal lining, the contour of which is largely absent, and which is characterized by a substantially uniform caliber. The inventors suggest that substantially uniform caliber of the inner strip in the tyre can ensure a minimum penetration of air into kargasokskiy, thus preferably provides a more effective performance. Economic advantage is also achieved through the use of films DVA one size for the Assembly of tires of various sizes. It is assumed that it is possible to produce blanks konturirovannyh internal DVA strips for tires of them and get the inner strip of the same dimensions under tension, as described in this context.
The wider part of the contour of the inner strip can also be described as radially offset relative to the horizontal axis of the inner strip. Fig.2 shows a typical cross section of the inner strip (patterns A-D). Fig.2 peppered sectional enlarged not to scale. Fig.2, the horizontal axis of the inner strip 11 is shown in dashed lines on each of the structures A-D. In the preferred embodiments, the thickening uniformly shifted from the horizontal axis, as shown in structure A. In the scope of the present invention also includes a thickening unevenly displaced relative to the horizontal axis, as shown in the structures of B-D. In some embodiments, inner padding konturirovany so that the edges of rounded contour, such as shown in structures C and D. the Specialist in the art it is evident, CC�related rounding may be formed during formation of the film due to the natural flow of the melt DVA. In other embodiments, the edge contour can be more sharply defined, as shown in structures A and B.
The contour of these inner strips of the present invention is formed so that a wider area of the inner strips correspond to the zones which are subjected to greater stress and more strong stretching during Assembly of the tire. As shown in structures A, b and C in Fig.2, the center line 12 and the opposite edge 14 of the contoured inner strip to the tire differ, the caliber of the inner strip to the tire at the center line more than caliber at the edge. If the thickness at the center line compared with the thickness at the edge, the wider portion can extend from each side of the center line 12 at a distance from 15.0% to 40.0% of the thickness of the inner strip, preferably at a distance from 20.0% to 40.0% of the thickness of the inner strip, preferably at a distance of 30.0% to 40.0% of the thickness of the inner strip, or most preferably at a distance from 35.0% to 40.0% of the thickness of the inner strip. In these embodiments, konturirovany inner padding is characterized by a ratio of caliber at the center line/calibre at the edge of approximately 3,0:1,0, approximately 2,5:1,0, approximately 2,0:1,1, approximately 1.8:1,0, or about 1.5:1.0 in. Strata�on the edge is a value in the range from approximately 10 μm to 500 μm, from approximately 50 μm to 500 μm, from 100 μm to 450 μm, or from 200 μm to 400 μm.
As shown in the structure D (Fig.2), the thickness of the inner strip in the shoulder area 13 more in comparison with the thickness at the center line. In the tire shoulder area removed from the center line at a distance of from 40% to 60% of the maximum thickness of the belt to overlap over the edge of the broker. In the inner lining of the Central line, located between the wider shoulder areas, characterized by a thickness of from 25% to 40% of the width of the inner strip, each wider shoulder area is characterized by a thickness from 10% to 25% of the thickness of the inner strip. If the thickness of the shoulder area compared to the thickness at the center line, over the widest part measure from the center point of the shoulder area. Preferably the thickness of the shoulder area in the Central point compared with the thickness at the center line. The Central point of the shoulder area is shown as element 10 in Fig.1 and the element 15 in Fig.2. The Central point of the shoulder area also approximate at approximately a quarter of the height of the tire measured from the area of tyre in the downward direction to the edge. In another embodiment, shoulder area can be considered as the area of the inner strip, located vertically over the outer side edge of the square at the base of the tread of the tire, when W�well mounted, pumped and installed in the car under load. The area at the base of the tread of the tire means the area is full of tire contact with the road surface when the vehicle is stationary. Outside side edge marks the sides (unlike the circular sides of the base.
In some embodiments, a wider area is located at a distance of 15% of the total length of the shoulder area on either side from the center point of the shoulder area (preferably within 20% of the total length of the shoulder area, at a distance of 30.0% of the total length of the shoulder area, or at a distance of 40.0% of the total length of the shoulder area, with all measurements carried out on either side from the center point of the shoulder area). In these embodiments, konturirovany inner padding is characterized by a ratio of caliber in the shoulder area/calibre at the center line approximately 3,0:1,0, approximately 2,5:1,0, approximately 2,0:1,1, approximately 1.8:1,0, or about 1.5:1.0 in.
The authors present invention believe that if you are using the konturirovannyh internal DVA strips during Assembly of the tire advantage lies in the fact that the ultimate tire includes an inner gasket DVA, characterized by a largely uniform in sizes from tyre to tyre. We should expect that these tires will be x�to raceresults high airtightness and improved or unchanged mechanical properties compared with tires, including internal standard fully elastomeric strip.
The inner strip of the present invention include dynamically vulcanized blend of an elastomer and a structural resin. The components of the elastomer, structural resin and DVA are described below. Agents for improving compatibility, such as secondary elastomers and excipients, such as fillers, clays and process oil are also described below.
In some embodiments, DVA includes an elastomer and a structural resin in a weight ratio of the elastomer/resin from 55:45 to 80:20, preferably 60:40 to 75:25, or more preferably from 65:35 to 75:25.
Structural resin, as a rule, forms a continuous matrix in DVA and provides proof DVA, while elastomers provide flexibility. Almost all known elastomers can be used in DVA for the manufacture of tires. To improve the impermeability primarily suitable elastomeric compositions of the present invention include a mixture of monomers, which contains at least (1) a monomer component With4-C7isoolefine and (2) multilevel as a monomer component. In one embodiment, the number of isoolefine value is in the range from 70 wt.% up to 99.5 wt.% in the calculation of the mass of all the monomers, and in another embodiment from 85 wt.% up to 9.5 wt.%. In one embodiment, the number multilingo component is an amount in the range of 30 wt.% to about 0.5 wt.%, and in another embodiment from 15 wt.% to 0.5 wt.%. In yet another embodiment, the monomer mixture contains from 8 wt.% to 0.5 wt.% multilatina.
Isoretinoin is a C4-C7connection, including as examples, but not limited to, compounds such as isobutylene, isobutene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene, 1-butene, 2-butene, simple methyl vinyl ether, indene, vinyltrimethylsilane, hexane, 4-methyl-1-penten. Multilatina is a C4-C14multilevel, such as isoprene, butadiene, 2,3-dimethyl-1,3-butadien, myrcene, 6,6-dimethylfuran, hexadiene, cyclopentadiene and piperylene. For homopolymerization or copolymerization in butyl rubbers can also be used with other polymerizable monomers such as styrene and dichlorostyrene.
An example of an elastomer is the so-called butyl rubber, or butyl elastomer comprising monomers of isobutylene monomers and isoprene. It is possible to use halogenated butyl elastomer. Halogenoalkane can be performed by any means, in this context, the term "halogenoalkane" is not limited to the method of halogenation. In one embodiment, the butyl elastomer halogenous at temperatures from 4°C to 60°C using�education hexane as the solvent and bromine (Br 2) or chlorine (Cl2as halogenides agent. Commercial versions halogenated butyl elastomer include, but are not limited to, bromobutyl (Bromobutyl) bromobutyl 2222 and (Bromobutyl) 2255 (company ExxonMobil Chemical Company).
Another suitable option halogenated butyl elastomer is a halogenated branched or star-shaped butyl elastomer. In one embodiment, star-shaped butyl elastomer (SBB) is a composition comprising a butyl elastomer and politian or a block copolymer. Polydiene, a block copolymer, or branching agents (in this context "polydiene") are typically reactive cationic compounds and are present during the polymerization of the butyl or halogenated butyl elastomer, or they can be mixed with butyl elastomer, get SBB. Extensive agent or polydiene can be any suitable branching agent. Preferably used in this context, the term "branched" or "hub and spoke" butyl elastomer denotes a halogenated compound (HSBB). Politian/block copolymer, or branching agents (in this context "polydiene"), as a rule, are reactive cationic compounds and are present during the polymerization of the butyl or halogenated butyl elastomer, or they can)�ü with the butyl or halogenated butyl elastomer, get HSBB.
Commercial HSBB is bromobutyl (Bromobutyl) 6222 (ExxonMobil Chemical Company).
The elastomer may also contain a functionalized interpolymer, in which at least some groups containing alkyl substituents present in the styrene monomer units contain Benzylalcohol, such as brominated or brominated styrene alkylthiophene group, or other functional group described below. Preferred styrene monomers in the composition otolaringologa copolymer include styrene, methylsterol, chloresterol, mitoxantron, indene and derivatives of indene, and combinations thereof. In a preferred embodiment, the elastomer is a styrene interpolymer. Interpolymer may be a statistical elastomeric copolymer (C4-C7somnolent such as comonomer of isobutylene and para-alkylthiol, such as a pair of methylsterol containing at least 80 wt.%, more preferably at least 90 wt.% the para-isomer and optionally include functionalized interpolymer in which at least one or more alkyl groups of the substituents present in the Monomeric units of styrene, contains Benzylalcohol or some other functional group. These compounds can be attributed to the functionality of�sirbanum copolymers of isobutylene and alkylthiol (FIMS), containing functional groups described in this context.
Preferred elastomers are suitable for implementing the present to practice the invention, include copolymers based on isobutylene. As mentioned above, the elastomer or polymer-based means of isobutylene elastomer or polymer containing at least 70 mol.% repeating units of isobutylene, and at least one other polymerizable link. Copolymer, based on the isobutylene can be halogenierte.
In one embodiment of the present invention, the elastomer is a butyl rubber-type or rubber-branched butyl-type, especially halogenated derivatives of the aforementioned elastomers. Suitable elastomers are unsaturated butilovyi, such as copolymers of olefins or of isoolefine and multilatinas. Examples of unsaturated elastomers suitable for use in the methods and compositions of the present invention include, but are not limited to, a copolymer of isobutylene and isoprene, polyisoprene, polybutadiene, polyisobutylene, a copolymer of styrene and butadiene, natural rubber, star-shaped butyl rubber, and mixtures thereof. Suitable for the present invention, the elastomers can be obtained by any suitable methods known in the art, and the present izobreteny� in this context is not limited to the method of producing elastomer.
In one embodiment, the butyl rubber polymer of the present invention are obtained when the interaction between 95 wt.% up to 99.5 wt.% of isobutylene and from 0.5 wt.% 8 wt.% isoprene, or in another embodiment from about 0.5 wt.% to 5.0 wt.% of isoprene.
Elastomeric compositions of the present invention also include at least one statistical copolymer containing C4-C7isoolefine, such as isobutylene, and ancilliary of comonomer, such as a pair of methylsterol containing at least 80 wt.%, more preferably at least 90 wt.% the para-isomer and optionally include functionalized interpolymer in which at least one or more groups containing alkyl substituents present in the Monomeric units of styrene, contain Benzylalcohol or some other functional group. In another embodiment, the elastomeric polymer is a statistical copolymer (C4-C7-α-olefin and a comonomer of alkylthiol, such as a pair of methylsterol containing at least 80 wt.%, in another embodiment, at least 90 wt.% the para-isomer and optionally include functionalized interpolymer in which at least one or more groups containing alkyl substituents present in the Monomeric units of styrene, contain Benzylalcohol or some other functional GRU�PU. Examples of compounds can be characterized as polymers containing the following monomer units, statistically along the polymer chain:
where R and R1independently represent hydrogen, (ness.)alkyl, such as C1-C7alkyl, and primary or secondary alkylhalogenide, and X denotes a functional group, such as halogen. In another embodiment, R and R1each denotes hydrogen. In one embodiment, up to 60 mol.% para-substituted styrene present in the statistical structure of the polymer that constitutes the above functionalized structure (2), and in another embodiment from 0.1 mol.% up to 5 mol.%. In yet another embodiment, the amount of functionalized structure (2) is from 0.2 mol.% up to 3 mol.%.
The functional group X is a halogen or some other functional group that can be included in the composition of compounds with nucleophilic substitution of benzylchloride other groups, such as carboxylic acids, salts of carboxylic acids, esters of carboxylic acids, amides and imide, hydroxyl groups, alkoxide, phenoxide, tiolet, thioether, xantac, cyanide, cyanate, amino, and mixtures of these groups. These functionalized somnolencia copolymers, process for their preparation, methods of functionalization and hole�Denia described in more detail in the patent US No. 5162445.
In another embodiment, the functional group is selected so that it worked or formed a connection with polar functional groups present in the matrix polymer of the desired composition, for example, acid functional groups, amino groups or hydroxy groups, by mixing the components of the polymer at high temperatures. In a preferred embodiment, the elastomer is a halogenated copolymer of isobutylene and para-methylstyrene, and in an even more preferred embodiment, the elastomer is a brominated copolymer of isobutylene and para-methylstyrene (BIMS).
In one embodiment, the elastomer comprises random copolymers of isobutylene and para-methylsterol (from 0.5 mol.% up to 20 mol.%), up to 60 mol.% groups, substituted bromide present in the benzene ring, contain a functional group, such as bromine or chlorine (pair-brometalia), acid or ester.
In another embodiment, the functional group is selected so that it worked or formed a connection with polar functional groups present in the polymer matrix, for example, acid functional group, amino group or hydroxyl group, when mixing the polymer components at high temperatures.
In one embodiment, the brominated copolymerization and para-methylsterol (BIMSM) usually contain from 0.1 mol.% up to 5 mol.% brometalia groups in the calculation of the total number of monomer units in the copolymer. In another embodiment, the number brometalia groups is from 0.2 mol.% to 3.0 mol.%, and in yet another embodiment, from 0.3 mol.% to 2.8 mol.% in another embodiment, from 0.4 mol.% to 2.5 mol.%, and in yet another embodiment, from 0.3 mol.% to 2.0 mol.%, moreover, the desired range may be any combination of any upper limit with any lower limit. In other words, typical copolymers containing from 0.2 wt.% up to 10 wt.% bromine based on the weight of the polymer, in another embodiment, from 0.4 wt.% 6 wt.% bromine, and in yet another embodiment, ranges from 0.6 wt.% to 5.6 wt.%, basically do not contain halogen in the ring or halogen in the main polymer chain. In one embodiment, the statistical polymer is a copolymer of units derived from C4-C7isoolefine (or samanaleya), of units derived from para-methylsterol, and units derived from para-halogenmethyl, with a couple of links-halogenmethyl in the polymer is from 0.4 mol.% to 3.0 mol.% in the calculation of the total number of pair-methylsterol, and in one embodiment, the content of units derived from para-methylsterol, is from 3 wt.% to 15 wt.% in the calculation of the total mass of the polymer, and in another embodiment from 4 wt.% up to 10 wt.%. In another embodiment, the para-halogenmethyl is a pair-brometalia.
Other elastomers containing units derived from C4-C7and�of olefines, suitable for use in the present invention include terpolymers comprising souletin and two multilatina where multilatina to polymerization are characterized by different structure of the main chain. These terpolymers include block and statistical terpolymers of units derived from C4-C7isoolefine, links, obtained from C4-C14multilatina, and links obtained from alkylthiols. These terpolymers can be obtained from monomers of isobutylene, isoprene and alkylthiol, preferably methylsterol. Other suitable terpolymer can be obtained by polymerization of monomers of isobutylene, cyclopentadiene and alkylthiol. These terpolymers are obtained in the conditions of cationic polymerization.
Suitable thermoplastic or structural resin (these terms are used interchangeably) refers to any thermoplastic polymer, copolymer or a mixture thereof, characterized by the young's modulus, equal to more than 500 MPa, and optionally a melting point of from 170°C to 270°C, including, but not limited to, one or more of the following polymers: a) polyamide resins: nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 11 (N11), nylon 12 (N12), nylon 610 (N610), nylon 612 (N612), a copolymer of nylon 6/66 filament (N6/66), nylon 6/66/610 (N6/66/610), nylon MXD6 (MXD6), nylon 6T (N6T), with�of OLIMAR nylon 6/6T, a copolymer of nylon 66/PP copolymer of nylon 66/PPS, (b) polyester resin: polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polietilentireftalat (PEI), a copolymer of PET/PEI, polyacrylate (PAR), polybutyleneterephthalate (PBN), liquid crystal complex polyester, copolymer of oxyalkylation and butylacetate and other aromatic polyesters, (C) polyarylene resin : polyacrylonitrile (PAN), polymethacrylamide, copolymers of Acrylonitrile and styrene (AS), copolymers of Methacrylonitrile and styrene, copolymers of Methacrylonitrile, styrene and butadiene, (d) polymethacrylate resins : polymethyl methacrylate, politiacal, (e) polyvinyl resins : vinyl acetate (EVA), polyvinyl alcohol (PVA), vinyl alcohol copolymer and ethylene (EVOA), a copolymer of ethylene and vinyl alcohol (EVOH), polyvinylidenechloride (PVDC), polyvinyl chloride (PVC), a copolymer of vinyl and vinylidene, a copolymer of vinylidene chloride methacrylate, (f) a cellulose resin: cellulose acetate, acetabular cellulose, (g) fluorinated resin: polyvinylidene fluoride (PVDF), polivinilhlorid (PVF), PalaLottomatica (PCTFE), copolymer of tetrafluoroethylene and ethylene (ETFE), h), aromatic polyimides, (i) polysulfones, (j) Polyacetal, (k) polylactones, l) polyphenyleneoxides and polyster, m) strolley anhydride, n) aromatic polyketone and (o) mixtures of the compounds mentioned in any of paragraphs � at all points (a) - n) inclusive as well as mixtures of any structural resins cited as an illustration or example, in the volume of each of paragraphs (a) to (n) inclusive. According to the present invention the definition of structural resin includes polymers of olefins such as polyethylene and polypropylene. Preferred structural resins include polyamide resins and mixtures thereof, particularly preferred resins include nylon 6, copolymer nylon 6/66 filament, nylon 11, nylon 12, nylon 610, nylon 612, and mixtures thereof.
In combination with the elastomer on the basis of the halogenated isobutylene you can use other elastomers (or "secondary elastomers"). Usually secondary elastomers suitable for konturirovannyh internal linings for buses, include, for example, natural rubber (NR), elastomers on the basis of higher dienes, isoprene rubber (IR), apostilirovannye natural elastomer, strollerderby elastomer (SBR), polybutadiene rubber (BR) (including cis-BR with a high content of CIS-isomer and cis-BR with a low content of CIS-isomer), nitrilebutadiene elastomer (NBR), hydrogenated NBR, hydrogenated SBR, olefin elastomers (e.g., ethylene-propylene elastomers (including EPDM and EPM), modified maleic acid-propylene elastomers (M-EPM), butyl rubber (11R), with�aimery of isobutylene and aromatic vinyl or diene monomer, acrylic elastomers (ACM), ionomers, other halogenated elastomers (e.g., chloroprene elastomers (CR), gitinova elastomers (CHR), chlorosulphurized polyethylene (CSM), chlorinated polyethylenes (CM), modified maleic acid chlorinated polyethylenes (M-CM), silicone elastomers (e.g., methylvinylsiloxane elastomers, dimethylsilicone elastomers, methylphenylpolysiloxane elastomers), sulfur-containing elastomers (for example, polysulfide elastomers), fluorinated elastomers (for example, vinylidenefluoride elastomers, fluorinated elastomers on the basis of simple vinyl ether, tetraftoretilenom elastomers, fluorine-containing silicone elastomers, fluorine-containing vospalenie elastomers), thermoplastic elastomers (for example, styrelseledamot elastomers, olefin elastomers, elastomers based on esters, urethane elastomers, or polyamide elastomers), and mixtures thereof.
As indicated, the secondary elastomer, dispersed in thermoplastic matrix in the form of small particles can not necessarily be cured, knit, or by curing, the partially, substantially or completely as described on the example of elastomer based on isobutylene or elastomer on the basis of the halogenated isobutylene. The specified crosslinking can about�odit in the secondary dispersion of the elastomer in the polyamide matrix by dynamic vulcanization, the same way as described for the halogenated elastomer.
Other agents to improve the compatibility include copolymers, such as copolymers characterized simultaneously structure thermoplastic resin and an elastomeric polymer, or only structure thermoplastic resin, or only the structure of the elastomeric polymer, or a copolymer structure containing apachegroup, carbonyl group, halogen, an amino group, malaysiaand group, oxazoline group, a hydroxy-group, etc., capable of reacting with thermoplastic resin or elastomeric polymer. Secondary elastomer is selected based on the type of thermoplastic polymer resin and an elastomeric polymer, which are intended for mixing. Suitable secondary elastomer selected from the group comprising grafted maleic anhydride elastomers, such as grafted maleic anhydride ABS resin plant elastomer), EPDM (ethylenepropylene elastomer), SEBS (stimulation/butadiene elastomer), etc., and also based elastomers malaysiavideo ethylene copolymer, such as molinerotary ethylene-propylene (EPM) elastomer, etilenovyi elastomer, telengiectasia elastomer, ethylenically elastomer, telengiectasia elastomer, ethylenepropylene (EPDM) e�Stomer, ethylene vinyl acetate elastomer, ethylenemethacrylic elastomer, ethylenically elastomer, the elastomer on the basis of a copolymer of ethylene and acrylic acid and the like, and mixtures thereof. Potentially suitable elastomers include EPDM/styrene elastomer, an elastomer based on grafted EPDM copolymer and Acrylonitrile, as well as their shape, modified with maleic acid, an elastomer based on a copolymer of styrene and maleic acid, thermosetting paroxysmal, and mixtures thereof.
The number of secondary elastomer, functionalized or not functionalized, if present, is usually less than 20 wt.%, preferably less than 10 wt.%, as a rule, from 0.5 wt.% to 20 wt.%, for example, from 5 wt.% to 15 wt.%, for example, from 7.5 wt.% to 12.5 wt.%.
Described in this context, the compositions contain one or more filler components such as calcium carbonate, clay, mica, silica and silicates, talc, titanium dioxide, starch and other organic fillers such as wood flour and carbon black. Suitable materials of the fillers include carbon black such as channel gas black, furnace black, thermal lamp black, acetylene black, lamp black, modified carbon black, such as treated silica or covered with a layer of silicon dioxide soot, etc. �predpochtitel is reinforced grade of carbon black. The filler may also include other reinforcing or non-reinforcing materials such as silica, clay, calcium carbonate, talc, titanium dioxide, etc., the Amount of filler may range from 0 to 30 wt.% based on the weight of the elastomer present in the composition.
The composition can also contain layered intercalated, or dispersed clay. These clays, also known as "nanoglide", is widely known. Swellable layered clay materials suitable for use in the present invention include natural or synthetic phyllosilicates, particularly smectic clays such as montmorillonite, nontronite, beidellite, volkonskaia, laponite, hectorite, saponite, sauquoit, MEGADETH, ceniai, stevensite, etc., as well as vermiculite, halloysite, oxides, aluminates, hydrotalcite, etc. These layered clays generally comprise particles containing a variety of silicate plates, in one embodiment, typically with a thickness of 4 Å to 20 Å, and in another embodiment from 8 Å to 12 Å, connected to each other and containing exchangeable cations such as Na+CA+2, K+or Mg+2present at the interlayer surfaces.
The layered clay can be obtained in intercalated and delaminated form in the processing of organic compounds (agents for swelling), the�mi react ion exchange with cations, present at the interlayer surfaces of the layered silicate. Suitable agents for swelling include cationic surfactants such as ammonium, alkylamine or alkylammonium (primary, secondary, tertiary and Quaternary), postname or sulfonamide derivatives of aliphatic, aromatic or arylaliphatic amines, phosphines and sulfides.
The number of stratified, intercalated, or dispersed clay, if present, is included in the compositions described in this context, is sufficient to provide improved mechanical properties or sealing properties of the composition, for example, improved tensile strength or air/kislotonepronitsaemost. In one embodiment, the amount typically ranges from 0.5 wt.% to 15 wt.%, or in another embodiment, from 1 wt.% up to 10 wt.%, and in yet another embodiment, from 1 wt.% up to 5 wt.% based on the content of polymer in the composition.
Used in this context, the term "process oil" means process oil obtained by refining oil, and synthetic plasticizers. Technology oil or oil-plasticizer may be present in the compositions, which prevents the penetration of air. These oils are mainly used to improve the processing of the composition during the production of gaskets on�reamer, when mixing, calendering, etc. Suitable oil-plasticizers, particularly suitable as component(s) of the elastomer include esters of aliphatic acids or hydrocarbon oil plasticizers such as paraffinic or naphthenic components gasoil. The preferred oil-plasticizer for use in standard, non DVA, not containing structural resin compositions for internal linings component is a paraffin oil, a hydrocarbon oil plasticizers suitable for use in said inner strips, include oils, characterized by the following main features.
Typically, process oil is selected from paraffinic oils, aromatic oils, naphthenic oils, and polybutene oils. Polybutene technological oil is a low molecular weight (having a number average molecular weight of less than 15000) homopolymer or copolymer comprising units derived from olefins containing from 3 to 8 carbon atoms, more preferably from 4 to 6 carbon atoms. In another embodiment, the polybutene oil is a homopolymer or copolymer of raffinate containing 4 carbon atoms. The rubber types of process oils is determined according to the ASTM standards depending on their belonging � class paraffin, naphthenic or aromatic hydrocarbon technology oils. Use the type of process oil, which is usually used in combination with the type of elastomeric component and a specialist in the chemistry of elastomers can determine the type of oil that should be used with a specific elastomer for a particular application. In thermoplastic elastomer composition oil content is from 0 or 0.5 wt.% or 1 wt.% to 20 wt.% or 40 wt.% in the calculation of the total weight of the composition, preferably do not include oil, to ensure maximum tightness of the composition.
In some embodiments, agents for improving compatibility are the compounds described in the application for the grant of U.S. patent No. 12/548797, filed August 27, 2009, preferably it is possible to use elastomers from polyisobutenylsuccinic anhydride (PIBSA).
Dynamically vulcanized mixture
At least one of any of the above elastomers and at least one of any of the above structural resins are mixed, obtaining a dynamically vulcanized blend. Used in this context, the term "dynamic vulcanization" means a vulcanization process in which volcanically vulcanized elastomer in the presence of thermoplastic material under conditions of high shear and elevated those�of temperature. As a result volcanically elastomer is simultaneously crosslinked and is preferably dispersed in thermoplastic matrix in the form of "microgel" from fine particles of submicron size. The elastomer is characterized by small particle size, wherein the equivalent diameter of the domain is changed in the range from 0.1 μm to 1 μm. The resulting material is in most cases referred to as dynamically vulcanized blend of (DVA).
Dynamic vulcanization was carried out by mixing the ingredients at a temperature which is high enough to ensure a high degree of cure of the elastomer during your stay DVA in production equipment and exceeds the melting point of thermoplastic component, in equipment such as roller mills, mixers, Banbury™ mixers of continuous action, plastictoy or mixing extruders, e.g., twin screw extruders. Typical temperature mixing DVA is in the range from 200°C to 270°C, or higher, depending on the component material. The unique characteristic of dynamically cured compositions is that, despite the curing of the elastomeric component of the composition can be processed and the recyclable using standard technologies for processing thermoplastics, �such as extrusion, injection molding, molding in the form, etc. Waste or waste as a result of the explosive evaporation also can be recycled and reprocessed, specialists in the art it is evident the complexity recycling standard elastomeric thermosetting wastes composed only of elastomeric polymers, due to the presence of crosslinks in vulcanized polymer.
The amount of thermoplastic material varies in the range from about 10 wt.% up to 98 wt.% in the calculation of the mass of the polymer mixture, in another embodiment, the amount of thermoplastic material is any one of the ranges from 20 wt.% to 95 wt.%, from 30 wt.% to 70 wt.%, or from 40 wt.% to 60 wt.%.
In one embodiment, the amount of elastomer in the composition is up to 90 wt.% in calculating the masses of the mixture of thermoplastic/elastomer, in another embodiment up to 70 wt.%, in one embodiment, up to 60 wt.% and in yet another embodiment, up to 40 wt.%. In still other embodiments, any of which can be combined with any of the above maximum content, expressed in percent by weight, the amount of elastomer is at least 2 wt.%, in another embodiment, at least 10 wt.%, and in yet another embodiment, at least 20 wt.%, and in another embodiment at least 35 wt.%.
Upon receipt of DVA, excipients and curing �Genty can be mixed or elastomer, or before mixing thermoplastic elastomer and thermoplastic material in the mixer, or add to the mixer in the process of contact or after contact of thermoplastic and elastomer with each other. These other materials can be added to accelerate the receipt or DVA to provide the required physical properties of the DVA. These support materials include, but are not limited to, curing agents, agents to improve compatibility, diluents and plasticizers. In respect of the elastomers of the present invention, the term "vulcanized" or "cured" refers to a chemical reaction, during which formed the connection or cross-linking between polymer chains of the elastomer.
In some embodiments, the plasticizer is mixed with the mixture of elastomer and thermoplastic. Suitable plasticizers include the commercial products sold under various trade names, including Sunmide™ (firm Sanwa Chemical Industry Co., Ltd., Kanagawa, Japan) and Uni-Rez™ (company Arizona Chemical, Jacksonville, Florida, USA). These materials generally have a molecular weight of less than 20,000 Da, such as from 1000 Da to 18,000 Da, preferably from 3000 to 17000 Yes, and also characterized by a flash point above 250°C, a brittleness temperature below -20°C and a softening temperature below priblisitelno°C.
Typical plasticizers can be chosen from the group including phthalate plasticizers, adipate plasticizers, phosphate plasticizers, glycolate plasticizers, sulfonamide plasticizers, trimellitate plasticizers and polymeric plasticizers, primarily low molecular weight nylony. The preferred plasticizers are selected from the group including phthalate plasticizers, adipate sulfonamide plasticizers and plasticizers. Examples of suitable plasticizers include dibutyl phthalate, DICYCLOHEXYL, diethyl, diisodecylphthalate, dimethyl phthalate, di(2-ethylhexyl)phthalate, diphenylfuran, vondelstraat, mixed diallylphthalate, butylbenzylphthalate, benzilla, di(2-ethylhexyl)adipate, mixed dialkylamides, tributoxyethyl, tributyl phosphate, Tricresyl phosphate, triphenyl, cresyldiphenyl, 2-Ethylhexylglycerin, isdeterministic, butylphenylmethyl, methylpteroylglutamate and mixed alkyltrimethyl. Sulfonamide plasticizers such as aklil - or arylsulfonamides include a preferred class of plasticizers for polyamides, including, for example, N-butylbenzenesulfonamide, N-cyclohexyl-para-toluensulfonate, ortho, para-toluensulfonate, N-ethyl-ortho, para-toluensulfonate and N-ethyl-ortho-toluensulfonate.
Volcanic�isoosi agent(s), with or without the use of at least one accelerator in the art, in most cases, are mentioned in connection with "curing system for the elastomer(s). Curing system used in connection with the fact that usually to achieve the beneficial effects apply more than one curing agent, especially when using a mixture of elastomer on the basis of higher dienes and less reactive elastomer.
Staplers or curing agents include at least one of the following components, for example, sulfur, zinc oxide and fatty acids, and mixtures thereof. Typically, the polymer composition is crosslinked with the addition of a curing agent, for example sulfur, metal oxides (i.e., zinc oxide, ZnO), ORGANOMETALLIC compounds, radical initiators of polymerization, etc., and upon heating of the composition or mixture. The following connections are common curing agents that can be used in the present invention: ZnO, CaO, MgO, Al2O3, CrO3, FeO, Fe2O3and NiO. These metal oxides can be used in combination with a corresponding complex of a metal stearate (e.g., stearates, Zn, Ca, Mg and Al), or with stearic acid, and sulfur or with alkylperoxyl connection. Suitable systems for Oteri�message elastomeric component based on halogenated copolymer of the present invention include zinc oxide in combination with zinc stearate or stearic acid and, optionally, one or more accelerators or curing agents. In the embodiment where there is one or more thermoplastic resins, peroxide curing agents are specifically excluded from thermoplastic elastomer composition, as in the presence of peroxide can occur crosslinking resins themselves, resulting in excessive hardening and the formation of a non-thermoplastic composition.
The vulcanization accelerators include amines, guanidine, thiourea, engineering, tirami, sulfenamide, sulfonamide, THIOCARBAMATE, xanthate, etc. Accelerate the curing process can be done by adding to the composition a certain amount of the accelerator. The mechanism for accelerating the vulcanization of rubber involves complex interactions between a curing agent, accelerator, activators and polymers. In the ideal case, the entire available curing agent is consumed in the formation of effective crosslinks which join the individual polymer chains with each other and enhance the overall strength of the polymer matrix. In the art will know many of the boosters. Curing agents, accelerators and including their cure system that can be used with one or more sew polymers known in the art.
Curing system can be dispersed in suitable concentratii rubber component, optionally containing one or more excipients, diluents and/or plasticizers, for example, by mixing the resin and curing components of the system at the stage of technological processing before adding a composition containing rubber, a thermoplastic using any mixing equipment commonly used in the rubber industry for the purpose indicated, for example, a two-roll mill for rubber, Banbury mixer, mixing extruder, etc. Specified mixing commonly referred to as "acceleration" of the rubber composition. In another embodiment, the rubber composition to accelerate the processing stage of the mixing in the extruder before the dynamic vulcanization, while the experience is difficult to control in practice when conducting commercial integrated process and less desirable. First of all, preferred is a dispersion of the curing system in the phase of rubber, or rubber composition also optionally including one or more excipients, diluents, and other standard ingredients, the intended end use, before adding the rubber in thermoplastic resin(s) in the mixing equipment in which it is expected to hold dynamic vulcanization. During the course of this process is pre-mixed �autoaway composition can be politizirovat to improve the efficiency of the process and a more efficient flow in the equipment for dynamic vulcanization, preferably in a mixing extruder, as described below.
In addition, properties cure system can be changed depending on the mixing process to satisfy the conditions for inner liners for tires. For example, to determine the ability to vulcanization of a particular elastomer(s) present in the composition, the elastomer(s) and a curing system can be mixed by methods known to those skilled in the art, for example, in a two-roll mill, Banbury mixer or in a mixing extruder. A sample of the mixture, in most cases called "speeded up" connection, it is possible by curing under static conditions, for example in the form of thin sheet (using the form), which is then heated and pressed in the press. Samples accelerated thin sheets, vulcanized for gradually increasing periods of time and/or at higher temperatures, then test on the deformation-strength properties and/or density of crosslinking to determine the degree of curing (described in detail in ASTM D412).
In another embodiment, the accelerated connection can be tested for the degree of vulcanization with the use of the test in the vulcanization was carried out at the viscometer with vibrating disk (described in detail in ASTM D2084). Accordingly, the overall BP�bedrooms and the temperature of the process of dynamic vulcanization can pick up to insure sufficient curing vulcanizing elastomers, present in the compositions to achieve desired properties of thermoplastic compositions containing these elastomers are, for example, the sealing properties, ensures the retention of air or liquid, using, for example, as the inner strip for bus.
It should be understood that volcanically elastomer, e.g. an elastomer based on halogenated isobutylene, such as FIMS or BIMS (or a mixture of these elastomers), melts in at least 50% of the maximum extent of curing (partial curing), which can be provided for the specified elastomer depending on the cure system, time and temperature, and, as a rule, the degree of vulcanization of the specified elastomer is more than 50% of the maximum degree of cure. Due to the fact that the secondary elastomer may also include volcanically elastomer, and the specified secondary vulcanized elastomer, for example, by dynamic vulcanization as described in this context, the specified secondary elastomer also usually melts in at least 50% of the maximum degree of vulcanization, which can be provided for the specified secondary elastomer, depending on its curing agent or curing system, as well as time and temperature at which volcanic�ization. The degree of vulcanization of the two elastomers may also be different. In any case, the elastomer is only partially vulcanized, if the degree of vulcanization is less than 90%, or 80%, or 70%, or 60%, or 50%. In another embodiment, as described in this context, the specified secondary elastomer can also instill, combined, and/or to associate with polyamide resin, in the presence or in the absence of a curing agent so that the degree of vulcanization of the specified secondary elastomer is not limited to the process provided that it is dispersing sufficiently with the formation of particles of small enough size to provide properties required for the application for which the composition is intended.
Cure system can be dispersed in suitable concentrations in the elastomer component, optionally containing one or more excipients, diluents and/or plasticizers, for example, when mixing the elastomer and vulcanizing components of the system during the manufacturing operation before adding a composition containing an elastomer in a thermoplastic using any mixing equipment commonly used in the elastomer industry for the purpose indicated, for example, two-roll mills for elastomers, Banbury mixer, mixing extruder, etc. Specified cm�shivanie commonly referred to as "acceleration" elastomeric composition. In one embodiment, the amount of at least one curing agent is typically from 0.1 parts/100 parts rubber, 15 parts/100 parts of rubber, in another embodiment from 0.5 parts/100 parts of rubber to 10 parts/100 parts of rubber. Curing agents and accelerators can be combined, as is known in the art.
Preferred polymeric components include as vulcanizing component(s) copolymers containing halogenated isobutylene, for example, halogenated butyl, such as chlorinated, brominated butyl or butyl and brominated copolymer of isobutylene and para-methylstyrene (BIMS copolymer), and a thermoplastic polymer, such as nylon or a mixture of various nylon polymers. Described in the context of the dynamically vulcanized composition is preferably primarily include halogenated elastomer component(s) in the form of a partially or fully cured of small particles dispersed in a continuous matrix of structural resin.
Methods of obtaining konturirovannyh internal linings DVA
Described in this context would refer to a method of producing the inner strip for bus, which is that: is made konturirovannuû internal lining for the tire, which comprises dynamically vulcanized�th mixture of the elastomers and structural resins. In some embodiments, the caliber contoured the inner strip to the tire at the center line more than the caliber of the bead. In other embodiments, the caliber contoured inner strip for bus in the meridional cross section of the shoulder compared with the gauge at the center line.
Scope of the present invention includes obtaining specified konturirovannyh internal linings DVA using any method known in the art to obtain konturirovannyh structures, and modifying it.
In this context, options contoured the inner strip DVA can be obtained from films of any desired size and shape such as linear, planar, elongated, cylindrical, conical, oval, and combinations thereof. The inner strip may be a continuous tube or "sleeve", or it is obtained from the worksheet.
Konturirovannuû internal lining for the tire can be manufactured by any means known in the art. For example, DVA can be ekstradiroval, Kalinkovichi or be molded into a sheet, film or tube. In specific embodiments, a film obtained by extrusion-blow process, is then cut into sheets. The thus obtained sheet or tubular cast product can be effectively used for manufacturing the inner�th strip for pneumatic tires or inner layer of the hose or the outer shell of the hose, characterized by low gas permeability. In addition, the low permeability characteristics allow the use of the composition not only with gas but also with other fluids, e.g., fluids such as water, hydraulic oil, brake fluid, heat transfer fluid, etc., provided that the gasket is directly in contact with the fluid, characterized by a corresponding resistance to the fluid.
Stage contouring, also known as "profiling calibre", can be performed by extrusion and calendering. In these embodiments, the contoured inner padding for a splint is contoured sheet. In specific embodiments, konturirovany sheet is a film produced by the method of irrigation.
Stage contouring can also be performed with non-uniform stretching of the film DVA. In these embodiments, the contoured inner padding for bus is unevenly stretched sleeve. Unevenly stretched the sleeve can be made as follows : (i) receive seamless internal lining for bus, characterized by a substantially uniform calibre, with seamless internal lining for bus receive in the form of sleeves, and a seamless inner padding for pneumatic W�NY includes dynamically vulcanized blend of an elastomer and a structural resin, (ii) seamless internal lining for the tire is subjected to uneven stretching at least in one direction, radial or axial, and (iii) are made konturirovannuû internal lining for bus in the form of unevenly stretched sleeves.
In some embodiments, the uneven stretching exercise on at least one of the heated sliding the drum for assembling tire. Heated sliding drum is a drum, generally used for building tires, which can be separated in at least one direction, radial or axial. In some embodiments, the heated sliding the drum is heated. In other embodiments, the heated sliding the drum pushing in at least one radial or axial direction. In still other embodiments, the heated sliding the drum is heated and expand in at least one radial or axial direction. In the present invention can use the type of drums to build tires that are described in patents US №№7144467, 6863106 and 6769468.
In some embodiments, the uneven stretching is carried out in more than one drum. For example, the sleeve can be stretched in the radial direction on a heated drum, and then stretch in the axial direction on a different drum.
In some embodiments, the heated� the drum is heated to a temperature in the range of from about 170°C to 230°C (preferably from 180°C to 220°C, from 190°C to 210°C, or from 190°C to 200°C). The drum is heated until the film temperature reaches the desired value, preferably for a time period of 30 sec or less (preferably 20 or less, 10 or less, 5 or less, or 1 or less), without destruction or other damage to the integrity of the film.
The heated film then can be stretched at a stretching speed of 0.01 s or more, of 0.10 or more, or 1.00 or more. The film is deformed to a total strain of less than 500%, preferably less than 400%, preferably less than 300%, 200%, less than 100% in the radial direction and/or axial direction.
In some embodiments, after heating, the internal lining is preferably cooled to a temperature below 200°C or 180°C or 160°C or 140°C or 120°C or 100°C or 80°C, while konturirovannuû internal lining for bus can be collapsed for transportation, storage, or can be moved in the same or other heating device and repeat the stage of heating. Stage heating may include only one stage, or two or three or four or more stages of heating.
Preferably, the permeability of the tyres, made of contoured inner strip, is less than 60 or 50 or 40 cm3×mm/m2-day. In another embodiment, the tire is made from contoured in�morning strip, characterized by a permeability of less than 0.08 or 0.015 or 0.05 cm3×mm/m2-d×mm Hg.PT.
Other options described in this context, relate to a method for increasing the diameter of the film, which is that seamless internal lining for the tire is stretched radially, while seamless inner padding for bus comprises a dynamically vulcanized blend of an elastomer and a structural resin. In these embodiments, seamless internal lining can be manufactured in the form of a film is not enough large size and then stretch radially, with a film of finite size which is then placed on a drum for assembling tire. Natural slow recovery material DVA is an advantage to ensure a snug fit extended sleeve to the drum for assembling tire. In some embodiments, the adhesion can be improved when using a heated drum Assembly. These features allow to obtain tires are different sizes from the film DVA same size, thus providing benefits such as reduced costs and waste (in fact reducible to zero).
In other embodiments, the present invention proposes the following objects.
1. Inner padding for bus, comprising dynamically vulcanizates structural resin (preferably nylon) and elastomer (preferably a functionalized copolymer of isobutylene and alkylthiol) (preferably at a weight ratio of the elastomer/resin is from 55:45 to 80:20, preferably 60:40 to 75:25, or more preferably from 65:35 to 75:25), wherein the inner gasket konturirovany (and inner spacer includes a center line and opposite edges, characterized by the fact that the caliber of the inner strip at the center line compared with the gauge at each end, and the ratio of the caliber of the Central line of/the caliber of the edge is preferably approximately 3,0:1,0, approximately 2,5:1,0, approximately 2,0:1,1, approximately 1.8:1,0, or approximately 1,5:1,0) (where in another embodiment, the inner spacer includes a shoulder area, remote from the center line by a distance equal to from 40% to 60% of the maximum width of the broker, the caliber of an inner lining in the shoulder area more than caliber at the center line where the interior padding is preferably characterized by a ratio of caliber in the shoulder area/calibre at the center line, approximately equal to 3.0:1.0 and 2.5:1.0 and approximately 2.0:1,1, approximately 1.8:1,0, or approximately 1,5:1,0).
2. Inner padding for tires according to claim 1, where the thickness at the edge is a value in the range from approximately 10 μm to 500 μm, from about 50 μm to 500 μm, from 100 μm to 450 μm, or from 200 μm to 400 μm.
3. The tire including an internal seal p. p. 1-2.
4. Method �of manufacturing the inner strip for tires according to claim claim 1-2, suitable for tires according to claim 3, which additionally includes the manufacture of contoured inner strip for bus, where the inner strip comprises a dynamically vulcanized blend of elastomers and structural resins.
5. A method according to claim 4, wherein the inner padding is a film produced by the method of irrigation, the method further consists in that: (i) dynamically vulcanized blend is extruded and (ii) dynamically vulcanized extruded mixture is subjected to calendering, get konturirovannuû internal lining for bus.
6. A method according to claim 4, wherein the inner padding for the tire is unevenly stretched the sleeve, the method further consists in that: (i) are made seamless internal lining for bus (preferably in the form of a film obtained by extrusion-blow process), characterized by a substantially uniform calibre, with seamless internal lining for bus receive in the form of sleeves, and a seamless inner padding for bus comprises a dynamically vulcanized blend of an elastomer and a structural resin, (ii) subjected seamless internal lining tires for uneven stretching in at least one radial or axial direction (preferably on a heated sliding reel) and (ii) receive konturirovannuû internal lining for bus.
7. A method of manufacturing a pneumatic tyre, which includes a method according to PP. 4-6.
8. Method of increasing internal diameter seamless pads for bus, which is that seamless internal lining for the tire is stretched radially, while seamless inner padding for bus comprises a dynamically vulcanized blend of elastomers and structural resins.
In this example as the inner strip for tires used cast konturirovannuû internal lining DVA, including nylon 6/66 filament (UBE 5033, 63 parts/100 parts rubber), brominated copolymer of isobutylene and para-methylsterol (100 parts/100 parts of rubber, of 0.75 mol.% Br, the content of para-methylstyrene in the copolymer was 5 wt.%), butylbenzenesulfonamide (BBSA, 27 parts/100 parts rubber), molinerotary Ethylenediamine (10 parts/100 parts rubber), talc SG2000 (2.5 parts/100 parts rubber), and Irganox™ 1098, Tinuvin™ 622LD, copper iodide, zinc oxide, zinc stearate and stearic acid, each in an amount less than 1 part/100 parts of rubber.
The thickness of the samples was changed and measured manually using calibrate to measure the thickness of the company Mahr Federal Inc. Size (ám) measured thickness konturirovany sheet (in inches), the data presented in generalized form in Fig.3. Fig.3 shows the distribution of caliber for the Comte�iravani film DVA compared with the film with the same caliber.
These contoured inner strip DVA can be compared with a standard inner linings, characterized by a substantially uniform caliber. You can use the following test methods: testing deformation-strength properties, mechanical properties, tensile, hardness shore a scale and a test of permeability. It was expected that contoured the inner strip DVA characterized by improved airtightness, improved or unchanged mechanical properties compared with at least nominal properties are given in table.1 below.
|Nominal film properties DVA for use as an inner lining for bus|
|The tensile strength||16,00 MPa|
|Relative elongation at break||390%|
|Modulus at 100% stretch||6,9 MPa|
|Hardness (shore a scale)||86|
1. Inner padding for bus comprising a dynamically vulcanized mixture� elastomer and a structural resin, the inner gasket konturirovany.
2. Inner padding for tires according to claim 1, characterized by a center line and opposite edges, where the caliber of the inner strip to the tire at the center line compared with the caliber of the edge.
3. Inner padding for tires according to claim 1 or 2, where the ratio of the caliber of the Central line/calibre at the edge of the inner strip for bus is approximately 2,5:1,0.
4. Inner padding for tires according to claim 1 or 2, where the internal spacer for the tire includes a pair of shoulder areas, and caliber in each shoulder area compared to the caliber of the Central line of the inner strip, the width of the Central part between the first zones is between 25% to 40% of the width of the inner strip and the width of each shoulder area ranges from 10% to 25% of the width of the inner strip.
5. Inner padding for tires according to claim 4, where the ratio of the caliber in the shoulder area/the caliber of the Central line of the inner strip is approximately 2,5:1,0.
6. Inner padding for tires according to claim 2, where the thickness at the edge is a value in the range from approximately 10 microns to 500 microns.
7. Inner padding for tires according to claim 1, wherein the elastomer is functionalized copolymer of isobutylene and alkylthiol, while the structural resin is nylon.
8. Bus, on�sponding internal lining for the tire according to claim 1.
9. A method of manufacturing the inner strip for bus, which is that:
get konturirovannuû internal lining for the tyres, with inner padding for bus comprises a dynamically vulcanized blend of elastomers and structural resins.
10. A method according to claim 9, where the inner padding for bus is a film produced by the method of irrigation.
11. A method according to claim 9, which additionally includes:
1) the extrusion dynamically vulcanized mixture and
2) calendering the extruded dynamically vulcanized mixture, obtaining internal lining for bus.
12. A method according to claim 9, where the inner padding for the tire is unevenly stretched sleeve.
13. A method according to claim 9, which additionally includes:
1) manufacturer of seamless inner lining for bus, characterized by a substantially uniform calibre, with seamless internal lining for bus receive in the form of a sleeve,
with seamless inner padding for bus comprises a dynamically vulcanized blend of an elastomer and a structural resin,
2) stretch seamless internal spacers for the tires, at least in one direction, radial or axial, and
3) the manufacture of contoured inner strip for bus.
14. A method according to claim 13, wherein the seamless internally� strip for tires is a film, obtained by extrusion-blow process.
15. A method according to claim 13, wherein the stretching in step (2) is carried out on the heated sliding the drum.
16. A method according to claim 9, where the inner strip has a center line and the opposite edge, with the gauge at the center line compared with the caliber of the edge.
17. A method according to claim 16, where konturirovany inner padding for bus characterized by the ratio of the thickness at the center line/thickness at the edge is approximately 2,5:1,0.
18. A method according to claim 9, where the shoulder area of the inner strip to the tire removed from the center line by a distance equal to from 40% to 60% of the maximum width of the broker, the caliber of the inner strip to the tire in the shoulder area more than caliber at the center line.
19. A method according to claim 18, where the inner padding for bus characterized by the ratio of the thickness of the shoulder area/thickness at the center line approximately 2,5:1,0.
20. A method according to claim 9, where the thickness at the edge of the inner strip for bus value is in the range from approximately 10 microns to 500 microns.
21. A method according to claim 9, where the elastomer is functionalized copolymer of isobutylene and alkylthiol, while the structural resin is nylon.
22. Method of increasing internal diameter seamless pads for bus, which is that seamless inner about�the curtains for bus stretch in the radial direction, while seamless inner padding for bus comprises a dynamically vulcanized blend of an elastomer and a structural resin.
SUBSTANCE: present invention relates to a pneumatic object. Pneumatic object is described which is provided with an elastomeric layer which is impermeable for inflating gas, wherein said impermeable elastomeric layer contains at least one thermoplastic styrene elastomer with block polyisobutylene, characterised by that said impermeable elastomeric layer additionally contains plasticising oil in amount of more than 5 to less than 150 phr (weight parts per 100 parts elastomer) and polyphenylene ether (PPE), where the polyphenylene ether is selected from a group consisting of poly(2,6-dimethyl-1,4-phenyl ether), poly(2,6-dimethyl-co-2,3,6-trimethyl-1,4-phenyl ether), poly-(2,3,6-trimethyl-1,4-phenyl ether), poly(2,6-diethyl-1,4-phenyl ether), poly(2-methyl-6-ethyl-1,4-phenyl ether), poly(2-methyl-6-propyl-1,4-phenyl ether), poly(2,6-dipropyl-1,4-phenyl ether), poly(2-ethyl-6-propyl-1,4-phenyl ether), poly(2,6-dilauryl-1,4-phenyl ether), poly(2,6-diphenyl-1,4-phenyl ether), poly(2,6-dimethoxy-1,4-phenyl ether), poly(1,6-diethoxy-1,4-phenyl ether), poly(2-methoxy-6-ethoxy-1,4-phenyl ether), poly(2-ethyl-6-stearyloxy-1,4-phenyl ether), poly(2,6-dichloro-1,4-phenyl ether), poly(2-methyl-6-phenyl-1,4-phenyl ether), poly(2-ethoxy-1,4-phenyl ether), poly(2-chloro-1,4-phenyl ether), poly(2,6-dibromo-1,4-phenyl ether), poly(3-bromo-2,6-dimethyl-1,4-phenyl ether), corresponding copolymers thereof and mixtures of said homopolymers or copolymers, and that the weight fraction of the polyphenyl ether ranges from more than 0.05 to less 5 times the weight fraction of styrene present in the thermoplastic styrene elastomer itself.
EFFECT: improved heat resistance and gas-impermeability of the gas-impermeable layer of the pneumatic object.
16 cl, 1 dwg, 3 tbl, 3 ex
SUBSTANCE: invention relates to the automotive industry. The proposed process of a pneumatic tyre production comprises moulding of the tyre uncured blank 2 and curing. Here that said uncured blank 2 is fitted in a mould 3 and cured therein. With the blank 2 fitted in the mould 3, side strip rubber edge E that makes a boundary section between a bead strip 13 and rubber 12 extending to the blank outer surface 2a is located on the more inner tyre side in the radial direction than an inner point P1 of the tyre ring. The said point makes the intersection point between an outer surface 2a and an axial line L1 extending through the bead ring 7 on the tyre inner edge in the radial direction. An outer edge 15Bo of a bent edge 15B of insulation rubber 15 extends between a bent part 9b of a carcass ply 9a and the bead rubber 12 and is located from the more outer side of the tyre in the radial direction than an edge E of the bead rubber.
EFFECT: longer life of the tyre due to the decrease of hollows formation near the bead rubber is achieved.
5 cl, 5 dwg, 2 tbl
SUBSTANCE: invention relates to car tires suitable for sportsters. Tire comprises tread divided by tire mid surface into first semi-tread (41) extending axially from mid surface to tread first edge (45). Note here that first semi-tread includes the primary circumferential groove (141) opening to rolling surfaces. Besides, tire includes semi-tread (42) extending axially from mid surface to tread second edge (46). Additionally, tire includes extra stiffener (151) composed of multiple radially-oriented thread-like reinforcing elements. Note here that said extra stiffener is located in radial direction from carcass reinforcing element inner side and levelled directly in radial direction relative to the primary circumferential groove.
EFFECT: more uniform wear, longer life, higher stiffness of tire crown zone.
9 cl, 18 dwg
SUBSTANCE: invention relates to automotive pneumatic tire design. Two tire sidewalls are connected in crown portion containing crown portion stiffener which passes in axial direction between two axially determined ends and over which tread is located. There is carcass stiffener fixed in two beads and passing through beads to crown portion, herewith the crown portion includes located in radial direction at inner side of carcass stiffener at least one layer-storage formed of rubber mixture with high antioxidant content. Herewith, at least one layer-storage has antioxidant content which is equal to or exceeds 5 parts by weight per 100 parts by weight of elastomer, but does not exceed 10 parts by weight per 100 parts by weight of elastomer, additionally, at least one layer-storage includes oxygen scavenger.
EFFECT: longer service life of tires.
9 cl, 9 dwg, 1 tbl
SUBSTANCE: invention relates to pneumatic tire design, predominantly for heavy trucks, with radial bar-mat reinforcements. Tire tread is connected with two beads (3) via two sidewalls. Metal reinforcing elements of at least one layer of bar-mat reinforcement (2) are non-constricted cords, showing in so called test for permeability the yield of less than 20 cm3/min. In radial plane on at least a portion of tire meridional profile, resin mixture thickness (E) between inner surface of tire cavity and bar-mat reinforcement metal reinforcing element point nearest to the mentioned inner surface of tire cavity is less than or equal to 3.5 mm. Ratio between values of resin mixture thickness between inner surface of tire cavity and bar-mat reinforcement metal reinforcing element point nearest to the mentioned cavity inner surface of two different tire parts exceeds 1.15.
EFFECT: higher fatigue endurance of tire.
21 cl, 4 dwg
SUBSTANCE: invention relates to automotive industry. Tire has bead core, carcass layer, tread rubber later, inner sealing layer, side strip reinforcement and filler cord layer. It differs from known designs in the use of rubber composition (a) including (A) rubber component and (B) filler and in that its dynamic accumulation modulus (E') equals 10 MPa or less at dynamic strain of 1% at 25°C. It is characterised by magnitude Σ of loss tangent tan δ at 28 to 150°C, equal to 5.0 or less as far as physical properties of vulcanised rubber is concerned.
EFFECT: smooth run, sufficient life in run with flat tire.
23 cl, 3 dwg, 4 tbl
SUBSTANCE: invention relates to automotive industry. Tubeless tire comprises: Crown 25 with reinforcement 80, 90 covered with tread 40, two side strips 30 extending the crow radially inward, two beads 20 located inside said side strips 20, each including circular reinforcing structure 70, carcass reinforcement 60 secured at every side strap, sealing layer 50 impermeable for injected gas to cover tire inner surface. Sealing layer in every tire side strap includes at least one slot 200 located radially between radial outer circular reinforcing structure and radius RE whereat carcass reinforcement features maximum axial width when tire is mounted on the rim and inflated to working pressure. Said slot features maximum radial height HR of 0.5-5 mm and extends over at least one half of tire circumference. Invention covers also the tire production process.
EFFECT: longer life of tire.
7 cl, 26 dwg
SUBSTANCE: invention relates to pneumatic tire and laminar plastic as inner bearing material. Proposed tire comprises laminar plastic composed of thermoplastic resin film or thermoplastic elastomer and rubber composition layer. Said rubber composition comprises 100 wt % of rubber compound, 0.5-20.0 wt % of a condensate to compound of the following formula 1: , where R1, R2, R3, R4 and R5 are hydrogen, hydroxyl group or C1-C8-alkyl group and formaldehyde, 0.25-200.0 wt % of methylene donor, sulfur or organic peroxide as curing agent, while donor-to-condensate ratio makes 0.5-10.0.
EFFECT: increased adhesion between film and rubber composition, ruled out tire lamination.
19 cl, 6 tbl
SUBSTANCE: rubber mixture is obtained by mixing 1-60 pts.wt low-molecular polymer based on conjugated dienes (B), having weight-average molecular weight measured using gel-penetrating chromatography per molecular weight of polystyrene from more than 30000 to not more than 200000, and content of vinyl bonds on the section of the diene compound with conjugated double bonds of not less than 40% per 100 pts.wt rubber component (A) which is mixed with (B). The rubber component (A) contains natural rubber and/or polyisoprene rubber and, if needed, at least one rubber selected from a group consisting of rubber based on a copolymer of butadiene and styrene, polybutadiene rubber and isobutylene isoprene rubber. The low-molecular polymer based on conjugated dienes (B) is obtained via anionic polymerisation, and the overall content of styrene links in the low-molecular polymer based on conjugated dienes (B) is less than 5 wt %.
EFFECT: disclosed composition has excellent processability during production and heat ageing resistance, high storage modulus and loss tangent.
10 cl, 6 tbl, 8 ex
SUBSTANCE: invention relates to aircraft engineering and automotive industry. Proposed method and device uses mechanical sealing to eliminate tire puncture by automatic pressing of sealant to tire inner surface originated in tire puncture and pressure drop thanks to extra smaller-diametre inner tube in rubber tubeless tire. Said inner tube is provided with sealing envelope with corrugated surface along its radius to compensate for tube size in working position in tire puncture. Said envelope is made from elastic porous material, for example, silicon, or latex, or foamed rubber, or foamed polyethylene. Said envelope is designed to provide, at normal tire inner pressure, a clearance, and pressing said envelope at pressure drop to tire inner surface at tube inner pressure. Said envelope is provided with protective layer from Kevlar or Teflon to protect inner tube from sharp articles.
EFFECT: tire serviceability after puncture at reduced operating pressure.
2 cl, 1 dwg
SUBSTANCE: invention relates to thermoplastic elastomeric compositions. A dynamically vulcanisable alloy includes: a) at least one elastomer containing isobutylene; b) at least one thermoplastic resin, c) an anhydride-functionalised oligomer, wherein before functionalisation, the oligomer has molecular weight in the range of 750-1250, and d) a plasticiser which is selected from a group which includes tertiary amines, secondary diamines and sulphonamides, wherein the anhydride-functionalised oligomer and plasticiser are present in a ratio of 0.15-3.0, the elastomer is present in a dispersed phase in the form of fine vulcanised or partially vulcanised particles in the continuous phase of the thermoplastic resin.
EFFECT: alloy retains high Shore hardness A and acquires improved fluidity necessary for treatment.
12 cl, 4 tbl
SUBSTANCE: invention relates to a rubber mixture for tyres and a studless tyre for a passenger vehicle. The rubber mixture for tyres includes a rubber component and finely ground silicon dioxide, where the rubber component contains modified natural rubber with phosphorus content of 200 ppm or less and butadiene rubber. The finely ground silicon dioxide has CTAB specific surface area of 180 to 600 m2/g and BET specific surface area of 185 to 600 m2/g. For 100 wt % of the rubber component, the amount of the modified natural rubber is 50 to 80 wt % and the amount of butadiene rubber is 20 to 50 wt %.
EFFECT: invention provides well balanced improvement of fuel saving, wear resistance and movement characteristics on an ice-covered and snow-covered road.
8 cl, 2 tbl, 7 ex, 1 dwg
SUBSTANCE: invention relates to rubber composition, in particular, for obtaining tyres or half-finished products for tyres. Rubber composition consists of at least diene elastomer, enhancing filler, cross-linking system, epoxy resin - from more than 1 to less than 20 phr and amine hardening agent - from more than 1 to less than 15 phr. Amine hardening agent is selected from the group, consisting of p-xilylenediamine, 1,3-bis(aminomethyl)cyclohexane, 1,8-diaminooctane, 3,3′-diaminobenzidine and their mixtures. Enhancing filler contains soot, silica or their mixture.
EFFECT: invention makes it possible to provide high rigidity with low deformation without noticeable impairment of hysteresis.
11 cl, 2 tbl
SUBSTANCE: invention relates to automotive industry particularly, to stud-less tires. Rubber mix comprises isoprene-based rubber, silicon dioxide, bis-(4-methyl benzothiazolyl-2)-disulphide and thiuram-based vulcanization promoter.
EFFECT: higher strength, longer life, higher fatigue strength, accelerated vulcanization.
4 cl, 1 tbl
SUBSTANCE: copolymer of conjugated diene compound and non-conjugated olefin includes block-copolymer, with peak area in range 70-110°C, constituting, at least, 60% of peak area in range 40-140°C, and with peak area in range 110-140°C, constituting 20% or less of peak area in range 40-140°C, where areas of peaks are measured by method of differential scanning calorimetry (DSC) in accordance with JIS K 7121-1987. Also claimed are copolymer-including rubber mixture, cross-linked rubber mixture and tyre.
EFFECT: copolymers possess high fatigue strength, low heat release and sufficient relative elongation at break.
16 cl, 2 tbl, 6 dwg, 8 ex
SUBSTANCE: invention relates to a rubber mixture and a tyre. The rubber mixture includes sulphur, a crosslinking activator, 20-100 w.p. of carbon black mixed with 100 w.p. of a rubber component. The carbon black has CTAB surface area of 60-105 m2/g, oil absorption 24M4DBP 70-105 cm3/100 g, N2SA/IA 0.88-0.95, and satisfies the formula: TINT(%)+0.4×oil absorption 24M4DBP(cm3/100 g)-0.5×CTAB surface area (m2/g) > 106 (1).
EFFECT: invention improves tyre wear resistance, rolling resistance, manufacturability and spalling resistance.
4 cl, 1 dwg, 5 tbl
SUBSTANCE: invention relates to formulation of a rubber mixture using surface-modified technical carbon and can be used in manufacturing tyres for passenger, cargo and racing cars. The composition of the tyre compound consists of surface-modified technical carbon and a functionalised polymer containing functional groups along the polymer chain. The functionalised polymer includes soluble butadiene-styrene rubber. The functional groups of the polymer include carboxyl or hydroxyl functional groups.
EFFECT: invention enables to obtain rubber with very low hysteresis and rolling resistance, improved adhesion with a wet road and excellent wear resistance.
21 cl, 11 dwg, 13 tbl
SUBSTANCE: invention relates to a rubber mixture for tyres and a pneumatic tyre made using said mixture. The rubber mixture is obtained using a method which includes a step of mixing a rubber component, silicon dioxide, a silane binding agent and at least one component selected from a group consisting of oxyacid, itaconic acid and a salt thereof. The oxyacid, itaconic acid and salt thereof have average particle size of not more than 300 mcm. The rubber mixture is obtained by combining 5-150 pts.wt silicon dioxide per each 100 pts.wt rubber component and combining 0.1-20 pts.wt silane binding agent and 0.3-25 pts.wt oxyacid, itaconic acid and salt thereof per each 100 pts.wt silicon dioxide.
EFFECT: high rate of reaction of the silane binding agent and silicon dioxide, fuel saving and resistance to abrasive wear.
15 cl, 6 tbl, 111 ex
SUBSTANCE: invention relates to a rubber composition, which can be used, in particular, in tyres based on at least one diene elastomer, one reinforcing filler, one cross-linking system, one phenolic resin and one polyaldehyde, where the phenol resin fraction ranges between 2 and 15 phr, and the polyaldehyde fraction ranges between 1 and 20 phr. The use of polyaldehyde makes it possible to advantageously replace conventional methylene donors while preventing the production of formaldehyde during the vulcanization of the rubber compositions and thus to limit the environmental impact of these compounds.
EFFECT: polyaldehyde compounds make it possible not only to obtain the rubber compositions exhibiting the same low-strain stiffness as the conventional rubber compositions using conventional methylene donors but also, to greatly improve the fatigue strength of the rubber compositions and thus the endurance of the tyres.
12 cl, 2 tbl
SUBSTANCE: invention relates to the field of industrial rubber compositions, intended for obtaining a semiproduct for tyres. A reinforced rubber composition based on at least (a) an elastomer matrix, containing non-halogenated natural caoutchouc, (b) a reinforcing filling agent, (c) a special polyamine compound, present in an amount from more than 0 to less than 7 mmol per 100 g of an elastomer.
EFFECT: invention provides the improved hysteresis of the rubber composition properties.
15 cl, 10 tbl
SUBSTANCE: invention relates to assembly of automotive tires. Note here that proposed process comprises the steps that follow. a) Assembly of non-vulcanised tire including at least one carcass ply and two circular locking structural elements. b) Assembly of crown structural element including at least one breaker element and tread band. Note here that at least one step between assembly of carcass element and assembly of crown element. c) Making of at least one first device for feed of the first elementary semi-finished product and one second device for feed of the first elementary semi-finished product. Note here that at least one first and second elementary semi-finished products differ. d) Assembly of at least one part of tire structural elements starting from at least one of the first and second elementary semi-finished products at one working station. Feed of said first and second semi-finished products by first and second feed devices.
EFFECT: expanded range of products, higher flexibility of tire assembly.
42 cl, 2 dwg