Elastomer composition

FIELD: polymer mixtures and rubber industry.

SUBSTANCE: low-permeable elastomer composition useful in manufacturing pneumatic diaphragm such as inside shell of tire comprises elastomer, filler, stratified clay, polybutene softener having molecular mass 400 to 10000, and curing agent. Elastomer can be random copolymer including unit derived from C4-C7-isomonoolefin and can be selected from halogenated isobutylene/p-methylstyrene copolymer, star-shaped butyl rubber, halogenated butyl rubber, and their combinations. Composition as a whole forms nanocomposite. Prior to be mixed with copolymer, clay may optionally be subjected to additional stratification treatment.

EFFECT: improved pneumatic diaphragm properties of composition and improved processability thereof.

13 cl, 19 tbl, 44 ex

 

The technical field to which the invention relates.

The present invention relates to low permeability of the elastomer composition, which may include nanoglide, and more particularly to a composition of the copolymer on isobutilene based filler, such as carbon black and clay, and with polybutenes a softening agent for the manufacture of pneumatic diaphragm, such as the inner shell of the bus.

Background of invention

Bromoethylene and chlorobutyrate are polymers that choose to hold air in tubeless tires. Similarly commercially available brominated isobutylene/p-methylstyrene copolymer (BEAM), such as described in US 5162445 and 5698640 typically used when a large value is the resistance to thermal aging, or other important property. Feature selection in the case of technical elastomer compositions depends on the balance of the required properties and the end use. For example, in the tire industry, you must balance all significant aspects such as the processing properties of the rubber compound before treatment (unvulcanized) in comparison with the performance of vulcanized rubber composite bus, and the nature of the bus, i.e. the diagonal in contrast to the radial location of cords in Karka the e bus, as well as taking into account the purpose for cars unlike trucks and unlike aircraft.

One method of changing the properties of the product and improve properties of pneumatic diaphragm is the addition of clay in elastomers with getting "nanocomposites nanocomposite". Nanocomposites are polymer systems containing inorganic particles with at least one dimension in the nanometer range. Some examples are described in US 6060549, 6103817, 6034164, 5973053, 5936023, 5883173, 5807629, 5665183, 5576373 and 5576372. The inorganic particles of the conventional type used in nanocomposites are phyllosilicate, inorganic substances of the General class of so-called "nanogen" or "clay". Ideally should occur intercalation in the nanocomposite, in which a space or gallery between the surfaces of clay particles embedded polymer. Ultimately, you must achieve an almost complete separation, in which the polymer is completely dispersed individually plastinochki clay nanometric size. Due to the General improvement of the qualities of pneumatic diaphragm of the various polymer compositions, when they are present in the clay, there is a need to have a nanocomposite with low permeability.

Nanocomposites are prepared using the brominated copolym the ditch of isobutylene and p-methylstyrene (see, for example, Elspass, etc., US 5807629, 5883173 and 6034164). Further improving the properties of these elastomeric compositions in unvulcanized and vulcanized States can be achieved by the use of substances to improve the processing properties. To improve processing AIDS elastomeric mixtures, it is possible to use resins and oils (or substance to improve the technological properties"), such as naphthenic, paraffinic and aliphatic resin. However, increasing the processing AIDS in the presence of oils and resins reach the price of losing air, not counting other undesirable effects on various other properties.

In the patent US 4279284, issued in the name Spadone, patent US 5964969, issued in the name Sandstrom and others, and European application 0314416 filed Mohammed, already described polybutene softeners and softener paraffin type. Softner paraffin type described in the patent US 5631316, issued in the name Costemalle, etc. in Addition, in the application WO 94/01295 filed Gursky and others described the use of oil paraffins and naphthenic oils and resins in the rubber composition for sidewalls of tires, and in the patent application US serial number 09/691764, filed October 18, 2000 (the legal successor of which is the owner of the rights in the present invention) Waddell and others, described is capable of painted rubber composition. Other publications describing contain softeners or resin is an elastomer or adhesive compositions include US 5005625, 5013793, 5162409, 5178702, 5234987, 5234987, 5242727, 5397832, 5733621, 5755899, EP 0682071 A1, EP 0376558 B1, WO 92/16587, JP 11005874, JP 05179068 A and JO 3028244. None of these descriptions is not offered a solution to the problem of improving processing AIDS elastomeric compositions which can be used for the manufacture of tyres, pneumatic diaphragms, etc., while maintaining or improving air permeance of these compositions.

Thus, there is still the problem of preparation of nanocomposites nanocomposite acceptable for the manufacture of pneumatic diaphragm, in particular a pneumatic diaphragm material which comprises a copolymer (or ternary copolymer") samanaleya with4With7, p-methylstyrene and p-kilometerstirana and/or halogenated branched butyl rubber. Despite the improvement of the barrier properties of elastomeric compositions, the preparation of nanocomposites nanocomposite associated with trends in deterioration of processing AIDS.

Additionally, there remains the problem of the introduction of natural rubber in a mixture of these copolymers as adding natural rubber lost some required properties. What it needs is an elastomeric composition and nanocomposite composition that retains the target quality pneumatic diaphragm, but has improved processability, which can provide magical and resin, even in the presence of natural rubber mixtures.

Summary of the invention

Embodiments of the present invention include an elastomeric composition comprising at least one statistical copolymer containing the link, derivateservlet from samanaleya with4With7at least one filler and polybutene oil with srednekamennogo molecular weight greater than 400 and a viscosity at 100°With more than 35 cSt. Copolymer selected from isobutylene/p-methylstyrene copolymer, halogenated isobutylene/p-methylstyrene copolymer, halogenated star-shaped butyl rubber, halogenated butyl rubber and mixtures thereof. The composition may also include a thermoplastic resin, a filler and/or exfoliating the clay. Acceptable thermoplastic resin include polyolefins, nylony and other polymers. The filler is selected from calcium carbonate, clay, mica, silica and silicates, talc, titanium dioxide, starch and other organic fillers such as wood flour, carbon black and mixtures thereof. Layered clay selected from a stratified natural or synthetic montmorillonite, nontronite, beidellite, volkonskoit, laponite, hectorite, saponite, Aconite, magarita, kenyata, stevensite, vermiculite, Gallois is a, aluminated, hydrotalcite and mixtures thereof. These compositions can be used in the manufacture of pneumatic diaphragms, such as, for example, the inner shell of the tyre.

Detailed description of the invention

The abbreviation "ppm 100" denote the number of parts per hundred parts of rubber, it is a measure, conventional in the art, in which the content of components of the composition is expressed relative to the main elastomeric component, i.e. in terms of 100 miscast. elastomer or elastomers.

In the example in the present description reference groups of the Periodic table of elements used in the new numbering scheme for groups of the Periodic table of elements, which is represented in Hawley's Condensed Chemical Dictionary 852 (edition 13th, 1997).

Occurring in the present description the term "elastomer" refers to any polymer or composition of polymers corresponding to the definition in ASTM D1566. The terms "elastomer" and "rubber"used in the present description, can be used interchangeably.

Elastomer

The compositions of the present invention include at least one elastomer. In one embodiment, the elastomer is a homopolymer or copolymer of at isobutilene basis. These polymers can be described as statistical sprinklers the steps from the link, derivatizing from samanaleya with4With7such as link, derivateservlet of isobutylene and at least one of other polymerizable monomers. The copolymer on isobutilene basis may be halogenated or dehalogenating.

In one embodiment, the elastomer isobutilene the base is a rubber Putilkovo type or branched rubber Putilkovo type, mainly halogenated versions of these elastomers. Acceptable elastomers are unsaturated butylketone, such as homopolymers and copolymers of olefins or isoolefine and multilatinas or homopolymers of multilatinas. The elastomers of these and other types suitable for carrying out the invention are well known and are described in Rubber Thechnology 209-581 (edited by Maurice Morton, Chapman & Hall, 1995), The Vanderbilt Rubber Handbook 105-122 (Robert F. Ohm ed., the firm R.T.Vanderbilt Co., Inc. 1990) and Edward Kresge and ..Wang 8 Kirk-Othmer Encyclopedia of Chemical Thechnology 934-955 (John Wiley & Sons, Inc. edition 4th, 1993). Non-limiting examples of unsaturated elastomers that may be used in the method and compositions of the present invention, are isobutylene-isoprene copolymer, polyisoprene, polybutadiene, polyisobutylene, butadiene-styrene copolymer, natural rubber, star-shaped butyl rubber and mixtures thereof. Acceptable for completed the I of the present invention, the elastomers can be obtained by any acceptable means, known in the art, and the scope of the invention to any particular method of producing elastomer presented in the present description, is not limited.

Butylketone get a reaction mixture of monomers, the mixture comprises at least (1) isorevenue with4With12Monomeric component, such as isobutylene, and (2) multiliteracy Monomeric component. Otoolefan is from 70 to 99.5 wt.% from the total mass of the mixture of comonomers in one embodiment, and from 85 to 99.5 wt.% in another embodiment. Multiliteracy component is contained in the monomer mixture in an amount of from 30 to 0.5 wt.% in one embodiment, and from 15 to 0.5 wt.% in another embodiment. And yet, in another embodiment, from 8 to 0.5 wt.% comonomeric mixture accounted for multilatina.

Otoolefan represents a connection With4With12, non-limiting examples of which are compounds such as isobutylene, isobutene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene, 1-butene, 2-butene, metilidinovy ether, inden, vinyltrimethylsilane, hexene and 4-methyl-1-penten. Multilevel is a polyunsaturated olefin with4C14such as isoprene, butadiene, 2,3-dimethyl-1,3-butadiene, MIRCEN, 6,6-dimethylfuran, hexadiene, cyclopentadiene and piperylene, as well as other monomers, such as described in EP 0279456 and US 5506316 and 5162425. the La homopolymerization or copolymerization with obtaining acceptable butyl rubber other polymerizable monomers, such as styrene and dichlorostyrene. One option butyl polymer according to the invention is produced by reaction of from 95 to 99.5 wt.% of isobutylene and from 0.5 to 8 wt.% isoprene or, however, in another embodiment from 0.5 to 5.0 wt.% isoprene. Butylketone and methods for their preparation are described, for example, in US 2356128, 3968076, 4474924, 4068051 and 5532312.

Industrial examples of suitable butyl rubber is isobutylene-isoprene copolymers EXXONBudilnik varieties with viscosity Mooney viscometer from 32±2 to 51±5 (ML 1+8 at 125°). Another industrial example of a suitable rubber Putilkovo type represents polyisobutylene rubber VISTANEXwith srednevozrastnoe molecular weight of from 0.9±0.15 to 2,11±0,23×106.

Another option butyl rubber, which can be used when implementing the invention, represents a branched or "star-shaped" butyl rubber. These rubbers are described, for example, in EP 0678529 B1, US 5182333 and 5071913. In one embodiment, the star-shaped butyl rubber ("GOITER") is a composition of butyl rubber (either halogenated or dehalogenating) and polydiene or block-copolymer (either halogenated or dehalogenating). Scope of the invention-specific method of obtaining the GOITER is not limited. Polydiene/block-copolymer or agents is obrazovaniya branches (below in the present description "polydiene") typically cation reactive and are present during the polymerization in obtaining butyl or halogenated butyl rubber, or can be mixed with butyl rubber with getting a GOITER. As agent for the formation of branches or polydiene can be used by any acceptable agent education branches, and a specific type of polydiene used to obtain the GOITER, the scope of the invention is not limited.

In one embodiment, the GOITER is usually composition Putilkovo or halogenated butyl rubber as described above and a copolymer of polydiene and partially hydrogenated of polydiene selected from the group comprising styrene, polybutadiene, polyisoprene, pulpitarian, natural rubber, butadiene-styrene rubber, ethylene-propylene-diene rubber (tapd), ethylene-propylene rubber (Sep), styrene-butadiene-styrene and styrene-isoprene-styrene block copolymers. These polydiene present in terms of mass percentage of monomer in the amount of more than 0.3 wt.% in one embodiment, and from 0.3 to 3 wt.% in another embodiment, however, in another embodiment from 0.4 to 2.7 wt.%.

Industrial option CRAW of the present invention is the product SB Butyl 4266 (company ExxonMobil Chemical Company, Houston, pc. Texas), which has a viscosity viscometer Mooney (ML 1+8 at 125°Since, according to ASTM D1646) from 34 to 44. Moreover, the product SB Butyl 4266 has the following vulcanization characteristics: MN is the 69±6 Nam·m, a ML is 11.5±4,5 Nam·m (article shall ndart ASTM D2084).

In an expedient variant of the copolymer on isobutilene the basis of this rubber on isobutilene basis, which can be used when implementing the invention may also be halogenated. Halogenated butyl rubber is produced by halogenoalkanes butyl product described above. Halogenoalkane can be performed in any way, and thus the volume of the invention to any particular method of halogenation is not limited. Methods of halogenation of polymers, such as butylene polymers described in US 2631984, 3099644, 4554326, 4681921, 4650831, 4384072, 4513116 and 5681901. In one embodiment, the butyl rubber halogenous in hexane diluent at a temperature of from 4 to 60°using as the halogenation agent is bromine (Br2) or chlorine (Cl2). Such halogenated butyl rubber has a viscosity Mooney viscometer from 20 to 70 (ML 1+8 at 125° (C) in one embodiment, and from 25 to 55 in another embodiment. The weight percent halogen content is from 0.1 to 10 wt.% in terms of the weight of the halogenated butyl rubber in one embodiment, and from 0.5 to 5 wt.% in another embodiment. And yet, in another embodiment, the weight percent content of halogen in the halogenated butyl rubber is from 1 to 2.5 wt.%.

Industrial option halogenated butyl rubber of the present invention is the product Bromobtyl 2222 (company ExxonMobil Chemical Company). Its viscosity to Mooney viscometer is from 27 to 37 (ML 1+8 at 125°C, ASTM 1646, modified method), and the bromine content is from 1.8 to 2.2 wt.% in terms of product Bromobutyl 2222. Further, the product Bromobutyl 2222 has the following vulcanization characteristics: MN ranges from 28 to 40 DN·m, ML ranges from 7 to 18 LTO·m (ASTM D2084). Other industrial version of the halogenated butyl rubber is a Bromobutyl 2255 (ExxonMobil Chemical Company). Its viscosity to Mooney viscometer is from 41 to 51 (ML 1+8 at 125°Since, according to ASTM D1646), and the bromine content is from 1.8 to 2.2 wt.%. Moreover, the product Bromobutyl 2255 has the following vulcanization characteristics: MN ranges from 34 to 48 DN·m, ML is from 11 to 21 Nam·m (ASTM D2084).

As another option, the brominated rubber component according to the invention using a branched or "star-shaped" halogenated butyl rubber. In one embodiment, this halogenated star-shaped butyl rubber ("GTB") is a composition of butyl rubber (either halogenated or dehalogenating) and polydiene or block-copolymer (either halogenated or dehalogenating). Methods of halogenation is described in detail in US 4074035, 5071913, 5286804, 5182333 and 6228978. Scope of the invention to any particular method according to the teachings GSOB is not limited. To obtain GSOB during the polymerization with the formation of Putilkovo or halogenated butyl rubber can be added or can be mixed with botulinum or halogenated butyl rubber polydiene/block-copolymers or agents of education branches (below in the present description "polydiene"), which typically cation reactive. As agent for the formation of branches or polydiene can be used by any acceptable agent education branches, and a specific type of polydiene used to obtain GSOB, the scope of the invention is not limited.

In one embodiment, GSOB generally is a composition Putilkovo or halogenated butyl rubber as described above and a copolymer of polydiene and partially hydrogenated of polydiene selected from the group comprising styrene, polybutadiene, polyisoprene, pulpitarian, natural rubber, butadiene-styrene rubber, ethylene-propylene-diene rubber, styrene-butadiene-styrene and styrene-isoprene-styrene block copolymers. These polydiene are in terms of mass percentage of the quantity of monomer in the amount of more than 0.3 wt.% in one embodiment, and from 0.3 to 3 wt.% in another embodiment, however, in another embodiment from 0.4 to 2.7 wt.%.

Industrial option GSOB of the present invention is Bromobutyl 6222 (firm ExxnMobil Chemical Company), having a viscosity viscometer Mooney (ML 1+8 at 125°Since, according to ASTM D1646) from 27 to 37, and a bromine content of from 2.2 to 2.6 wt.% in terms of GSOB. Moreover, the product is Bromobutyl 6222 has the following vulcanization characteristics: MN ranges from 24 to 38 Nam·m, ML is from 6 to 16 DN·m (ASTM D2084).

Another option elastomer isobutilene basis, which can be used when implementing the invention, is isorevenue copolymer that includes a link derivateservlet from kilometerstirana. In one embodiment, this elastomer is a statistical copolymer comprising at least links derivateservlet from isoolefine with4With7such as links, derivateservlet from isobutylene, and links derivateservlet from kilometerstirana. Kilometerstirana link can be ortho-, meta -, or para-alkyl substituted styrene unit. In one embodiment, derivateservlet from kilometerstirana element is a p-gallmeister containing at least 80%, more preferably at least 90 wt.%, para-isomer. As halogroup" may be any atom of halogen, suitable atom of chlorine or bromine. Halogenated elastomer may also include functionalized copolymers, in which the minority is her least some alkyl replacement group, available in the styrene monomer units contain benzyl halogen atom or any other functional group, optionally as described below. These copolymers in the present description are called "isoretinoin copolymers, including link, derivateservlet from kilometerstirana" or simply "isoretinoin copolymers".

Another option elastomer isobutilene basis, which can be used when implementing the invention, is isorevenue copolymer that includes a link derivateservlet from kilometerstirana. In one embodiment, the elastomer according to the invention is a statistical copolymer comprising at least links derivateservlet from isoolefine with4With7such as links, derivateservlet from isobutylene, and links derivateservlet from kilometerstirana. Kilometerstirana link can be ortho-, meta -, or para-alkyl substituted styrene unit. In one embodiment, derivateservlet from kilometerstirana element is a p-gallmeister containing at least 80%, more preferably at least 90 wt.%, para-isomer. As halogroup" may be any atom of halogen, suitable atom of chlorine or bromine. Halogenated elastomer may also include functionalized copolymers, is where at least some alkyl replacement group, available in the styrene monomer units contain benzyl halogen atom or any other functional group, optionally as described below. In the present description, these copolymers is called "isoretinoin copolymers, including link, derivateservlet from kilometerstirana" or simply "isoretinoin copolymers".

Isorevenue copolymer can also include links, derivateservlet from other monomers. Otoolefan copolymer may be a connection With4With12, non-limiting examples of which are compounds such as isobutylene, isobutene, 2-methyl-1-butene, 3-methyl-1-butene, 2-methyl-2-butene, 1-butene, 2-butene, metilidinovy ether, inden, vinyltrimethylsilane, hexene and 4-methyl-1-penten. Such a copolymer may also include links derivateservlet from multilatina. Multilevel is a polyunsaturated olefin with4C14such as isoprene, butadiene, 2,3-dimethyl-1,3-butadiene, MIRCEN, 6,6-dimethylfuran, hexadiene, cyclopentadiene and piperylene, as well as other monomers, such as described in EP 0279456 and US 5506316 and 5162425. Appropriate links derivateservlet of styrene monomers that may be contained in the copolymer include styrene, methylsterol, chloresterol, mitoxantron, inden, indene derivatives and with whom Catania.

In another embodiment, the copolymers are statistical elastomeric copolymers of link, derivatizing from ethylene, or link, derivatizing from α-olefin with3With6and link, derivatizing from kilometerstirana, preferably p-kilometerstirana containing at least 80%, more preferably at least 90 wt.%, para-isomer and also include functionalized copolymers in which at least some alkyl replacement group in the styrene monomer units contain benzyl halogen atom or any other functional group.

Preferred isorevenue copolymers can be characterized as copolymers comprising monomer units, statistically distributed along the polymer chain, the following formulas:

in which each of R and R1independently denotes a hydrogen atom, a lower alkyl, preferably alkyl with C1With7or primary or secondary alkylhalogenide, and X denotes a functional group, such as halogen atom. Suitable halogen atoms are chlorine atoms, bromine or combinations thereof. In the preferred embodiment, each of R and R1denotes a hydrogen atom. Group-CRR1H-CRR1X which may be substituents in the styrene ring in either the ortho, either meta-or para-position, preferably in the para-position. Up to 60 mole percent n-substituted styrene units included in the copolymer structure may have the above functionalized structure (2) in one embodiment, and from 0.1 to 5 mol % in another embodiment. And yet, in another embodiment, the content of the functionalized structure (2) is from 0.4 to 1 mol %.

The functional group X may be a halogen atom or any other functional group that can be implemented by nucleophilic substitution of benzyl halogen atom other groups, such as residues of carboxylic acids, salts of carboxylic acids, esters of carboxylic acids, amides and imides, hydroxyl, alkoxide, venexiana, tialata, thioester, xanthogenate, cyanide, lanata, the amino and mixtures thereof. These functionalized somnolence copolymers, method for their preparation and methods of functionalization and vulcanization more specifically described in US 5162445.

The most widespread use of such functionalized materials are elastomeric random copolymers of isobutylene and p-methylstyrene, comprising from 0.5 to 20 mol % of units of the p-methyl styrene, in which up to 60 mol % replacement of methyl groups in the benzyl ring contain a bromine atom or chlorine,preferably a bromine atom (p-brometalia), as well as their options, functionalized with residues of acids or esters, in which the halogen atom is substituted by a residue of maleic anhydride or acrylic or methacrylic acid. These copolymers are referred to as "halogenated isobutylene/p-methylstyrene copolymers" or "bronirovannymi isobutylene/p-methylstyrene copolymers", which is technically available under the name of elastomers EXXPRO(company ExxonMobil Chemical Company, Houston, Texas). It is obvious that the use of the terms "halogenated" or "octabromodiphenyl" is not limited to the method of halogenation of the copolymer, they merely serve to describe copolymer, which includes links derivateservlet from isobutylene, links, derivateservlet of p-methylstyrene, and links derivateservlet of p-kilometerstirana.

In the preferred embodiment, these functionalized polymers have essentially homogeneous compositional distribution, resulting in the content of p-alkylthiophene links in at least 95 wt.% polymer is in the 10%range relative to the average content of p-alkylthiophene links in the polymer. More preferred polymers are also characterized by a narrow molecular weight distribution (Mw/Mn), constituting less than 5, more preferably less than 2.5, preferably srednevozrastnoe molecules of the nuclear biological chemical (NBC weight in the range of from 200,000 to 2000000 and preferred srednekamennogo molecular weight in the range of from 25,000 to 750,000 people, as this determine gel chromatography.

Such copolymers can be obtained by suspension polymerization of the monomer mixture using a Lewis acid as catalyst, followed by halogenoalkanes, preferably by bromirovanii, in solution in the presence of halogen and initiator of free-radical polymerization, such as heat and/or light and/or a chemical initiator, and optional subsequent electrophilic substitution of bromine atom other functional derivational link.

Preferred halogenated isobutylene/p-methylstyrene copolymers are brominated polymers which generally contain from 0.1 to 5 wt.% brometalia groups. And yet, in another embodiment, the number brometalia groups is from 0.2 to 2.5 wt.%. To put it differently, the preferred copolymers contain from 0.05 to 2.5 mol % of bromine atoms in recalculation on weight of the polymer, more preferably from 0.1 to 1.25 mol % of bromine atoms, and virtually free of ring halogen atoms or halogen atoms in the main polymer chain. In one embodiment, the copolymer is a copolymer of units, derivatizing from samanaleya with4With7, links, derivatizing of p-methylstyrene, and links, derivatize avannah of p-kilometerstirana, moreover, p-kilometerstirana links are in the copolymer in an amount of from 0.4 to 1 mol%, calculated on the copolymer. In another embodiment, this p-gallmeister is a p-brometalia. The viscosity Mooney viscometer (1+8, 125°With ASTM D1646, modified method) is from 30 to 60 units.

The elastomeric component contained in the compositions according to the invention may include different numbers of one, two or more different elastomers. For example, variants of compositions according to the invention can contain from 5 to 100 ppm 100 halogenated butyl rubber, from 5 to 95 ppm 100 star butyl rubber, from 5 to 95 ppm 100 halogenated star-shaped butyl rubber, or from 5 to 95 ppm 100 halogenated isobutylene/p-methylstyrene copolymer. In another embodiment, the compositions contain from 40 to 100 ppm 100 halogenated isobutylene/p-methylstyrene copolymer and/or from 40 to 100 ppm 100 halogenated star-shaped butyl rubber (GSOB). The elastomeric composition according to the invention can contain other elastomers or so-called "auxiliary" elastomeric components.

Auxiliary elastomeric component

In the compositions of the present invention may contain auxiliary elastomeric component. Such rubbers include, although their with the list is not limited to, natural rubbers, branch, Rubezhnoe, Ukraine rubber, butadiene-styrene rubber (BSC), polybutadiene rubber, isoprene-butadiene rubber (CSI), styrene-isoprene-butadiene rubber (SIBC), ethylene-propylene rubber, ethylene-propylene-diene rubber (tapd), polysulfide, nitrile butadiene rubber, propylenoxide polymers, star-shaped butyl rubber and halogenated star-shaped butyl rubber, commercially available brominated butyl rubber, chlorinated butyl rubber, star-shaped polyisobutylene rubber, star commercially available brominated butyl rubber (polyisobutylene-isoprene copolymer, isobutylene-methylstyrene copolymers such as isobutylene/meta-bromoethylene, the isobutylene-bromoethylene, isobutylene-chloromethylstyrene, halogenated isobutylene-cyclopentadiene, isobutylene-chloromethylstyrene and mixtures thereof.

The composition and pneumatic diaphragm according to the invention may also contain auxiliary rubber component. Option contained auxiliary rubber component is natural rubber. Detail natural rubbers described Subramaniam in Rubber Technology 179-208 (1995). Necessary for the implementation of the present invention, natural rubber selected from the Malaysian rubber such as SMR CV, SMR 5, SMR 10, SMR 20, and SMR 50 and mixtures thereof, and the viscosity by viscometer moon is these natural rubbers at 100° (ML 1+4) is from 30 to 120, more preferably from 40 to 65. Test viscosity to Mooney viscometer, referred to in the present description, carried out in accordance with ASTM D-1646.

Some examples of industrial synthetic rubber auxiliary that can be used when implementing the present invention are products NATSYN(company Goodyear Chemical Company) and BUDENE1207 or BR 1207 (firm Goodyear Chemical Company). Suitable rubber is a polybutadiene with a high content of CIS-links (CIS-Bq). The term "CIS-polybutadiene or polybutadiene with a high content of CIS-links" means that the use of 1,4-CIS-polybutadiene, where the number of CIS-component is at least 95%. Example polybutadiene industrial products with a high content of CIS-links used in the present composition is the product BUDENE1207. Acceptable ethylene-propylene rubber is technically available as a product VISTALON(company ExxonMobil Chemical Company).

In one embodiment of the invention, the auxiliary rubber contains so-called semi-crystalline copolymer (PKS). Semi-crystalline copolymers described in the patent application US serial number 09/569363, filed may 11, 2000 (the legal successor of which is the holder of infusion is his invention). Usually the PCB is a copolymer of units, derivatizing from ethylene or propylene, and links, derivatizing from α-olefin, and that α-olefin contains from 4 to 16 carbon atoms in one embodiment and in another embodiment, the PCB is a copolymer of units, derivatizing from ethylene and units, derivatizing from α-olefin, and that α-olefin contains from 4 to 10 carbon atoms, where this PCB has a certain degree of crystallinity. In yet another embodiment, the PCB is a copolymer of units, derivatizing from 1-butene, and link derivatizing from another α-olefin, and the other α-olefin contains from 5 to 16 carbon atoms, where this PCB also has a certain degree of crystallinity. The PCB may also be a copolymer of ethylene and styrene.

Auxiliary rubber component of the elastomeric composition can contain in the range of up to 50 part./100 in one embodiment, up to 40 ppm 100 in another embodiment, however, up to 30 ppm 100 in yet another variant.

Thermoplastic resin

The composition of the invention can include an optional thermoplastic resin. Thermoplastic resins suitable for performing the present invention can be used alone or in combinations, they are a resin, sod is readie nitrogen atoms, oxygen, halogen, sulfur, or other groups capable of interacting with aromatic functional groups such as halogen atoms and acid groups. Resin contained in the nanocomposite in an amount of from 30 to 90 wt.% from nanocomposites nanocomposite in one embodiment, from 40 to 80 wt.% in another embodiment, however, from 50 to 70 wt.% in yet another variant. However, in another embodiment, the resin is contained in an amount of more than 40 wt.% from nanocomposites nanocomposite and more than 60 wt.% in yet another variant.

Acceptable thermoplastic resin include resins selected from the group comprising polyamides, polyimides, polycarbonates, polyesters, polysulfones, polylactones, Polyacetals, Acrylonitrile-butadiene-styrene resin (ABS), Polyphenylene oxyde (PFD), polyster (PPS), polystyrene, styrene-Acrylonitrile resins (SAN), resins of copolymers of styrene/maleic anhydride (SMA), aromatic polyketone (PEEK, PED and RECK), and mixtures thereof.

To an acceptable thermoplastic polyamides (nayanam) include crystalline or resinous high molecular weight solid polymers including copolymers and ternary copolymers containing in the polymer chain recurring amide units. The polyamides can be obtained by polymerization of one or more Epsilon-lactams, such as caprolactam, pyrrolidin, laurinlactam and aminoundecanoic covenants, or aminoxy the lots, or polycondensation of dibasic acids and diamines. Suitable nylony as fibre-forming and moulding grades. Examples of such polyamides are polycaprolactam (nylon-6), polyarylate (nylon-12), polyhexamethylenediamine (nylon-6,6), polyhexamethylenediamine (nylon-6,9), polyhexamethylene (nylon-6,10), polyhexamethylenediamine (nylon-6, if) and the product of polycondensation of 11-aminoundecanoic acid (nylon-11). Additional examples of acceptable polyamides (mainly those softening temperature which is less than 275°and C) presented in volume 16 Encyclopedia of Chemical Technology 1-105 (John Wiley & Sons, 1968), Concise Encyclopedia of Polymer Science and Engineering 748-761 (John Wiley & Sons, 1990) and volume 10 Encyclopedia of Polymer Science and Technology 392-414 (John Wiley & Sons, 1969). When performing the present invention can be used effectively technically available thermoplastic polyamides, preferably linear crystalline polyamides, softening temperature or melting point which is within 160 and 260°C.

Acceptable thermoplastic polyesters, which can be used include polymeric products of the interaction of one or a mixture of aliphatic or aromatic polycarboxylic acids, esters or anhydrides and one or a mixture of diols. Examples of suitable polyesters include the Oli(TRANS-1,4-cyclohexyl), poly(alcans2-C6dicarboxylate), such as poly(TRANS-1,4-cyclohexylglycine) and poly(TRANS-1,4-cyclohexanediol); poly(CIS - or TRANS-1,4-cyclohexanediamine)alkalicarbonate, such as poly(CIS-1,4-cyclohexanedimethanol)oxalate and poly(CIS-1,4-cyclohexanedimethanol)succinate; poly(alkylene2-C4terephthalate), such as polyethylene terephthalate and polyethylenterephthalat; poly(alkylene3-C4isophthalate), such as polietilentireftalat and polytetramethylene, etc. materials. Preferred polyesters derivateservlet from aromatic dicarboxylic acids such as naphthalene and o-phthalic acid, and diols with2With4such as polyethylene terephthalate and polybutylene terephthalate. Preferred polyesters are usually characterized by a melting point in the range from 160 to 260°C.

Polyphenylenether (PFA) a thermoplastic resin that can be used in accordance with the present invention, are well known technically available materials derived oxidative dehydrocondensation polymerization of alkyl substituted phenols. They usually represent a linear amorphous polymers, the glass transition temperature which is within the range from 190 to 235°C. These polymers, method of their production and compo is icii with polystyrene additionally described in US 3383435.

Other thermoplastic resins which can be used include polycarbonate similar to those described above polyesters, such as segmented copolymers of simple esters and phthalates; polycaprolactone polymers; styrene resins, such as copolymers of styrene with less than 50 mol % of Acrylonitrile (SAN) and resinous copolymers of styrene, Acrylonitrile and butadiene (ABS); sulfonic polymers, such as polyphenylsulfone; copolymers and homopolymers of ethylene and α-olefins with2C8in one embodiment, the homopolymer of units, derivatizing from propylene, and in another embodiment, a statistical copolymer or a block copolymer of segments, derivatizing from ethylene and units, derivatizing from propylene, and the like, thermoplastic resin, which are known in the art.

Polybutenes softner

In the composition of the invention contains polybutenes softner. In one embodiment, the invention polybutenes softening agent is a low molecular weight (less than 15000 Mn) a homopolymer or copolymer derivatizing of olefin units, each of which contains from 3 to 8 carbon atoms in one embodiment, preferably 4 to 6 carbon atoms, in another embodiment. And yet, in another embodiment, the polybutene is a Homo-polymer or copolymer 4the raffinate. A variant of such low molecular weight polymers, called "polybutene" polymers described, for example, Synthetic Lubricants and High-Performance Functional Fluids 357-392 (Leslie R. Rudnick &Ronald L. Shubkin, ed., Marcel Dekker, 1999) (below in the present description "polyvalency softner" or "polybutene").

In one embodiment, the invention polybutenes softening agent is a copolymer of at least derivatizing of isobutylene units, derivatizing of 1-butene units and derivatizing of 2-butene units. In one embodiment, the polybutene is a homopolymer, a copolymer or a ternary copolymer of three sections, in which derivateservlet of isobutylene units comprise from 40 to 100 wt.% copolymer, derivateservlet of 1-butene units comprise from 0 to 40 wt.% copolymer, and derivateservlet of 2-butene units comprise from 0 to 40 wt.% copolymer. In another embodiment, the polybutene is a copolymer or a ternary copolymer of three sections, in which derivateservlet of isobutylene units constitute from 40 to 99 wt.% copolymer, derivateservlet of 1-butene units comprise from 2 to 40 wt.% copolymer, and derivateservlet of 2-butene units comprise from 0 to 30 wt.% copolymer. And yet, in another embodiment, the polybutene is a ternary copolymer of three sections, in which the derivative is specified from isobutylene units constitute from 40 to 96 wt.% copolymer, derivateservlet of 1-butene units comprise from 2 to 40 wt.% copolymer, and derivateservlet of 2-butene units comprise from 2 to 20 wt.% copolymer. However, in another embodiment, the polybutene is a homopolymer or a copolymer of isobutylene and 1-butene, in which derivateservlet of isobutylene units range from 65 to 100 wt.% homopolymer or copolymer, and derivateservlet of 1-butene units range from 0 to 35 wt.% copolymer.

Polybutene softeners that can be used when implementing the invention, generally have srednekamennogo molecular weight (Mn) less than 10000 in one embodiment, less than 8,000 in another embodiment, however, less than 6000 in yet another variant. In one embodiment, polybutene oil has srednekamennogo molecular weight greater than 400 and more than 700 in another embodiment, however, in another embodiment, more than 900. The preferred option may be a combination of any lower limit with any higher limit specified in the present description. For example, in one embodiment, the polybutene according to the invention the polybutene has srednekamennogo molecular weight of from 400 to 10,000 and from 700 to 8000 in another embodiment. Values acceptable viscosity polybutene softener at 100°are in the range from 10 to 6000 cSt (CST) in one VA is ianthe, from 35 to 5000 cSt at 100°in another embodiment, however, in another embodiment exceed 35 cSt at 100°and more than 100 cSt at 100°in yet another variant.

Industrial versions of such softener softeners are series PARAPOL(company ExxonMobil Chemical Company, Houston, pc. Texas), products such as PARAPOL450, 700, 950, 1300, 2400 and 2500. Technically available polybutene softeners series PARAPOLare synthetic liquid polybutene, and each combination has a certain molecular weight, and all combinations thereof can be used in compositions according to the invention. Molecular weight (Mn) of oils PARAPOLrange from 420 (product PARAPOL450) to 2700 (Mn) (product PARAPOL2500), as set gel chromatography. The MMD values (Mw/Mn) of oils PARAPOLare in the range from 1.8 to 3, in one embodiment, and from 2 to 2.8 in the other version.

Table 1 shows some properties of oils PARAPOLthat can be used in versions of the present invention, the viscosity was determined according to ASTM D445-97, and the molecular weight - gel chromatography.

Table 1.

Properties of products PARAPOLthe individual with the mouths
GradeMnViscosity at 100°C, cSt
45042010,6
70070078
950950230
13001300630
240023503200
250027004400

Softeners PARAPOLhave the following other properties: density (g/ml) a softener PARAPOLvaries from approximately 0,85 (product PARAPOL450) to 0.91 (product PARAPOL2500); bromine number (mg/g) of oils PARAPOLis in the range from 40 in the case of the softening agent of the Mn 450 to 8 in the case of a softener with Mn 2700.

The elastomeric composition according to the invention may include polybutene one or more types in the form of a mixture or between them before adding to the elastomer or elastomer. In this way it is possible to vary the number and distinctive properties (e.g. viscosity, Mn, etc.) mixture polybutenes a softener. For example, the product PARAPOL450 can be used when necessary low viscosity compositions according to the invention, whereas the product PARAPOL2500 can be used when a higher viscosity, or you can use a combination of them is to make any other viscosity or molecular weight. In this way it is possible to adjust physical properties of the composition. More specifically, the expression "polyvalency softening agent" includes a single oil or a combination of two or more oils used to achieve any required viscosity or molecular weight (or other properties), at the intervals specified in the present description.

Polybutenes the softener or softener contained in the elastomeric composition according to the invention in quantities of from 1 to 60 ppm 100 in one embodiment, from 2 to 40 ppm 100 in another embodiment, from 4 to 35 ppm 100 in yet another variant, however, from 5 to 30 ppm 100 in another embodiment. In a preferred embodiment, polybutenes softner does not contain aromatic groups or unsaturated bonds.

Filler and clay

The elastomeric composition can include 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. In one embodiment, the filler is carbon black or modified carbon black. The preferred filler is a carbon black poluminimalnogo varieties contained in an amount of from 10 to 150 ppm 100 composition, more preferably from 30 to 120 ppm 100. Carbon black is priemlimyh for using varieties as outlined in Rubber Technology 59-85 (1995), covers a range of products from N110 to N990. More suitable options of carbon soot, which can be used, for example, the material of the tyre tread, are products N229, N351, N339, N220, N234 and N110, standards ASTM D3037, D1510 and D3765. Variants of carbon soot, which can be used, for example, the material of the sidewalls of the tires are products N330, N351, N550, N650, N660 and N762. Variants of carbon soot, which can be used, for example, the material of the inner tire casings or chambers, are products N550, N650, N660, N762, N990 and Regal 85 (company Cabot Corporation Alpharetta, GA), etc.

The composition may also contain stratified clay. These clays, also called "nanoline", well known, and their distinctive properties, production methods and blending with the polymers described, for example, in JP 2000109635, 2000109605, 11310643, DE 19726278, WO 98/53000, US 5091462, 4431755, 4472538 and 5910523. Swellable layered clay materials suitable for achieving the objectives of the present invention include natural or synthetic phyllosilicates, mainly smectite clay, such as montmorillonite, nontronite, beidellite, volkonskoit, laponite, hectorite, saponite, sekonic, MEGADETH, Kenya, stevensite and the like, as well as vermiculite, halloysite, aluminated, hydrotalcite etc. These layered clays generally comprise particles, operasie many silicate plastinates, the thickness is from 4 to 20 angstroms in one embodiment, and from 8 to 12 angstroms in another embodiment, interconnected and containing the substituted cations, such as Na+Ca+2To+and Mg+2that are on the surfaces of the intermediate layers.

The layered clay can be subjected to intercalation and to stratify by treatment with organic substances (causing swelling agents)that are able to engage in ion exchange reactions with the cations on the surfaces of the intermediate layers of the layered silicate. Reasonable cause swelling agents include cationic surfactants such as ammonium, alkylamine and alkylammonium (primary, secondary, tertiary and Quaternary), postname and sulfonamide derivatives of aliphatic, aromatic or arylaliphatic amines, phosphines and sulfides. Suitable aminovymi connections (or have the appropriate ammonium ions) are those that have the structure R1R2R3N, where R1, R2and R3denote alkali or alkenes with C1With20that may be the same or different. In one embodiment, the dissecting substance is a so-called long-chain tertiary amine, which has at least R1denotes alkyl or alkene is 14With20.

Another class cause swelling agents include those that can be covalently linked to the surfaces of the intermediate layers. These include polysilane structure-Si(R')2R2where R' is in each case identical or different, their values are chosen from alkyl, alkoxy or oxirane, and R2denotes an organic radical that is compatible with the matrix polymer of the composite.

Other acceptable cause swelling agents include protonated amino acids and their salts containing 2-30 carbon atoms, such as 12-aminododecanoic acid, Epsilon-caprolactam and the like materials. Reasonable cause swelling agents and methods of intercalation of layered silicates described in US 4472538, 4810734, 4889885 and WO 92/02582.

In a preferred embodiment of the invention dissecting the additive is combined with halogenated polymer. In one embodiment, the additive includes all primary, secondary and tertiary amines and phosphines; alkyl and arylsulfonyl and thiols; and their multifunctional options. Suitable additives include long chain tertiary amines, such as N,N-dimethylethanolamine and N,N-dioctadecyl, the so-called allylmethylamine digidrirovannoe tall oil and the like, and polytetrahydrofuran with the terminal amino group, long-chain thiol and tio is ulfate connection like hexanitrocobaltate sodium. In another embodiment, the invention improved impermeability copolymer reach by adding a polyfunctional curing groups, such as hexamethylenediamine sodium and hexamethylenediamine aldehyde.

Clay or layered clay is introduced into the nanocomposites in accordance with the present invention in a quantity which is sufficient to achieve improved mechanical properties or barrier properties of the nanocomposites nanocomposite, such as tensile strength at break or permeability to air/oxygen. Usually these amounts are in the range from 0.5 to 15 wt.% in one embodiment, from 1 to 10 wt.% in another embodiment, however, from 1 to 5 in yet another variant in terms of nanocomposites nanocomposite polymer component. If expressed in parts per hundred parts of rubber, clay or layered clay can contain from 1 to 30 ppm 100 in one embodiment, and from 3 to 20 ppm 100 in another embodiment. In one embodiment, the layered clay is a clay, stratified by alkylamino.

Vulcanizing agents and accelerators

Compositions prepared in accordance with the present invention typically contain other components and additives usually used in rubber mixes, such as pigments, accelerators, cross-linking and curing materials, antioxidants, antiozonants and Omnitel. In one embodiment, the substance to improve the technological properties (resin), such as naphthenic, aromatic or paraffinic oil filling rubber phase latex, may be contained in an amount of from 1 to 30 ppm 100. In another embodiment, naphthenic, aliphatic, paraffinic and aromatic resins and oils in the composition is essentially absent. The term "essentially absent" means that naphthenic, aliphatic, paraffinic and aromatic resin contained in the composition, if they are generally, not more than 2 ppm 100.

Polymeric compositions, such as those used in the manufacture of tires, usually structure. It is known that the physical properties, performance characteristics and durability of vulcanized rubber compounds directly related to the number (density) of cross-links and the type of cross-links formed during the vulcanization reaction [see, e.g., Helt and others in The Post Vulcanization Stabilisation for NR, Rubber World, 18-23 (1991)]. Cross-linking and curing substances include sulfur, zinc oxide and fatty acids. Can also be used peroxide vulcanizing group. Typically, the polymer composition can be made by adding a curing substances, such as sulfur, oxides of metals (i.e. zinc oxide), ORGANOMETALLIC compounds, iniciativasverde-radical polymerization, etc., with further heating. Thus, in particular, the usual vulcanizing groups, which are typically used in the implementation of the present invention include the following substances: ZnO, CaO, MgO, Al2About3, CrO3, FeO, Fe2About3and NiO. These metal oxides can be used in combination with the corresponding complex stearate metal [e.g., Zn(stearate)2, CA(stearate)2, Mg(stearate)2and Al(stearate)3] or with stearic acid or a sulfur compound, or alkylperoxide connection [see also, Formulation Design and Curing Characteristics of NBR Mixes for Seals, Rubber World 25-30 (1993)]. The process is conducted under such a method can be accelerated, and when the rubber elastomer mixtures to accelerate use often.

Accelerators include amines, guanidine, thiourea, thiazole, tirami, sulfenamide, sulfonamide, thiocarbamates, xanthates, etc. accelerate the vulcanization process can be achieved by adding to the composition a quantity of the accelerator. The mechanism of accelerated vulcanization of natural rubber involves the complex interaction between the vulcanizing agent, a vulcanization accelerator, an activator, and polymers. Ideally, the formation of effective cross-links, which connect between the two polymer chains and increase the overall strength of the polymer matrix, consumes all available mekanizumu substance. In the art known for a variety of accelerators, which include, though not limited to, the following products: stearic acid, diphenylguanidine (FGD), tetramethylthiuramdisulphide (TMTD), 4,4'-dithiodimorpholine (DTDM), terabyteunlimited (TBTD), 2,2'-benzothiadiazole (MBTS), dihydrate disodium salt hexamethylen-1.6-bestialite, 2-(morpholinothio)benzothiazole (MBS or MOR), a mixture of 90% MOR and 10% MBTS (product MOR 90), N-tert-butyl-2-benzothiazolesulfenamide (TBBS) and N-oxydiethylene-N-oxydiethylene (HSSE), 2-ethylhexanoate zinc (AGC), N,N'-diethyltoluamide.

In one embodiment, at least one curing substance is contained in an amount of from 0.2 to 15 ppm 100 and from 0.5 to 10 ppm 100 in another embodiment. Curing substances include those described above components that contribute to or influence the vulcanization of elastomers, such as metals, accelerators, sulfur, peroxides and other substances which are conventional in the art.

Processing

The mixture components can be carried out by combining the polymer components and clay in the form of intercalate in any acceptable mixing device, such as a Banbury mixermixer Brabenderor preferably a mixer/syringe-car. The mixing is carried out at t is mperature in the range of from the melting point of the elastomer and/or auxiliary rubber, used in composition, in one embodiment, and from 80 to 340°in another embodiment, however, from 120 to 300°in yet another variant, under conditions of shear exposure, sufficient to clay intercalate stratified and become uniformly dispersed within the polymer with the formation of nanocomposites nanocomposite.

In the preparation of exemplary compositions of the mixing is carried out in a closed mixer BR Banburyaccording to the method known in the art. As a rule, first from 70 to 100% of the elastomer or elastomers is stirred for 20 to 90 seconds or until until the temperature reaches a range of from 40 to 60°C. Then, in the mixer usually add 3/4 of the filler and the remaining amount of elastomer, if any, and stirring is continued until, until the temperature reaches a range of from 90 to 150°C. Next add the remaining filler and the softening agent and the stirring is continued until, until the temperature reaches a range of from 140 to 190°C. further, the mixture is subjected to finishing listomania on an open mill and allowed to cool down to a temperature of from 60 to 100°With, then add vulcanizing group.

In one embodiment, the blending clays carried out by the method known to experts in the field of technology in which the clay is added to the polymer at the same time, that and black carbon. Polybutenes softening agent in the mixing cycle usually added later, after the carbon black and clay reach elastomeric matrix adequate dispersion.

Vulcanized rubber mixture according to the invention may include various elastomers and fillers together with polybutenes the softner. The composition of the invention typically include elastomers isobutilene basis, such as halogenated isobutylene/p-methylstyrene copolymer, butyl rubber and halogenated star-shaped butyl rubber (GSOB), either alone or in any combination with each other, and in one embodiment, polybutenes softening agent is contained in an amount of 5 to 30 ppm 100.

In one embodiment, the composition is a halogenated isobutylene/p-methylstyrene copolymer in an amount of from 50 to 100 ppm 100, which may include natural rubber in an amount of 5 to 50 ppm 100, polybutenes softening agent contained in an amount of 5 to 30 ppm 100, a filler such as carbon black, in an amount of from 20 to 80 ppm 100, and exfoliating the clay in an amount of from 0.5 to 20 ppm 100 in one embodiment, and from 2 to 15 ppm 100 in another embodiment. Vulcanizing agents such as phenolic resins, sulfur, stearic acid and zinc oxide may be contained in amounts of from 0.1 D. the 5 frequent./100.

In another embodiment, the composition may be GSOB contained in an amount of from 50 to 100 ppm 100, which may include halogenated isobutylene/p-methylstyrene copolymer in an amount of 5 to 95 ppm 100 in one embodiment, and from 20 to 70 ppm 100 in another embodiment, and polybutenes softening agent contained in an amount of from 3 to 30 ppm 100, a filler such as carbon black, in an amount of from 20 to 80 ppm 100 and exfoliating the clay in an amount of from 0.5 to 20 ppm 100 in one embodiment, and from 2 to 15 ppm 100 in another embodiment. Vulcanizing agents such as phenolic resins, sulfur, stearic acid and zinc oxide may be contained in an amount of from 0.1 to 5 ppm 100.

However, in another embodiment, the composition may be a halogenated butyl rubber contained in an amount of from 50 to 100 ppm 100, which may include halogenated isobutylene/p-methylstyrene copolymer in an amount of 5 to 95 ppm 100 in one embodiment, and from 20 to 70 ppm 100 in another embodiment, and polybutenes softening agent contained in an amount of from 3 to 30 ppm 100, a filler such as carbon black, in an amount of from 20 to 80 ppm 100 and exfoliating the clay in an amount of from 0.5 to 20 ppm 100 in one embodiment, and from 2 to 15 ppm 100 in another embodiment. Vulcanizing agents such as phenolic resins, sulfur, stearic acid and the oxide Qing is a, may be contained in an amount of from 0.1 to 5 ppm 100.

The elastomer isobutilene basis, which can be used when implementing the invention can be mixed with various other rubbers or plastics, as set forth in the present description, in particular with thermoplastic resins, such as nylony and polyolefins such as polypropylene and copolymers of propylene. These compositions can be used as a pneumatic apertures, such as aperture vulcanizers and the inner shell, the pneumatic tubes (such as pneumatic shock absorbers), diaphragms, and for other purposes where high ability to retain air or oxygen. In one embodiment, the air permeability (air, oxygen or nitrogen at 65° (C) such vulcanized rubber mixture is between 1.2×10-8up to 4×10-8cm3·cm/cm2··at and from 1.5×10-8up to 3.5×10-8cm3·cm/cm2··at another option.

In one embodiment, the pneumatic diaphragm can be manufactured according to the method of combining at least one of a statistical copolymer comprising link derivateservlet from samanaleya with4With7at least one filler, polybutene oils with srednekamennogo the molecular the second weight greater than 400, and at least one vulcanizing agents and vulcanization of these combined components, as described above.

Test methods

Vulcanizing properties were determined with the help of the device ODR 2000 at the same temperature and 3-degree arc. The test samples were vulcanizable at a specified temperature, usually from 150 to 160°With, in the course of time, which corresponded to TS + appropriate warm-up time form. When it was possible to determine the physical properties (see Table 2) vulcanized rubber compounds were tested according to the ASTM standard. The characteristics of the stress/deformation (tensile strength, elongation at break, modulus, fracture energy) was determined at room temperature using a bursting machine Instron 4202. The hardness And the shore was determined at room temperature by means of a device Zwick Duromatic. Error 2σ) when determining the voltage when the elongation of 100% ±of 0.11 MPa; error (2σ) in determining relative elongation was ±13%.

Used here and throughout this description the value of "MN" and "ML" refer respectively to the maximum torque and minimum torque". Value : "PE" is the number of plasticity Mooney, the value of ML (1+4)of the criminal code which indicates the viscosity to Mooney viscometer. Error 2σ) when this last definition is ±0,65 units of viscosity to Mooney viscometer. The value of "Ts" indicates the vulcanization time in minutes, and the value of "Ts" indicates when podocarpaceae.

The molecular weight of polybutene softener PARAPOLwas determined by gel chromatography, and the error values established srednekamennogo molecular weight (Mn) was ±20%. The method of determining the molecular weight (Mn and Mw) and molecular mass distribution (MMD) in General presented in the patent US 4540753 (issued in the name of Cozewith and others), see to it the links and work Verstrate and others, Macromolecules 21 3360 (1988). During the typical definition of a set of 3 columns operates at 30°C. For elution of the solvent can be used stabilized tetrahydrofuran (THF) or 1,2,4-trichlorobenzene (TCB). These speakers are calibrated using polystyrene standards precisely known molecular masses. Using the correlation between the set held by the volume of polystyrene standards and held volume of the analyzed polymer determine the molecular weight of this polymer. Viscosity polybutene softener PARAPOL(table 1) was determined in accordance with ASTM D445-97.

Tensile strength was determined by matney temperature using an automated test system materials Instron series IX 6.03.08. This used microarray for tensile test in the form of dumbbells width of 0.08 inch (0,20 cm) and a length of 0.2 inches (0.5 cm) between the two extended ends). The thickness of the samples was varied and measured manually using a digital Mitutoyo measuring instrument connected to the system computer. The samples were stretched at a speed of movement of the slider 20 in/min (51 cm/min) and recorded the data voltage/strain. Recorded average values of stress/strain at least three samples. Error 2σ) when determining the ultimate tensile strength was ±to 0.47 MPa.

Adhesion was determined by adhesion odnogolosy strips, to establish which was preparing the adhesive connection one inch by three inches with Kraft paper. The samples were hung horizontally (by the method of exfoliation) in a drying Cabinet with circulating air and on the free end of the connection hung a weight of 100, the temperature in the oven every 15 min was increased by 10°F (4,1°C). The temperature of destruction of the connection due to the exfoliation is the average of three experiments.

The error in the determination of the values of the fatigue fracture was ±20%.

Permeability to oxygen was determined with the use of the device MOCONOxTran model 2/61, working on the principle dinamicheskoj the definition of penetration of oxygen through a thin film according to the publication R.A.Pasternak and other 8 Journal of Polymer Science: part a-2 467 (1970). The units are values cm3·mil/m2·day·mm Hg In General this method consists in the following: a flat film or samples of rubber clamp in diffusion cells, of which blowing with oxygen-containing gaseous medium to remove residual oxygen. This gaseous medium is directed to the sensor until then, until a stable set to zero. Next, from the outside into the chamber from the diffusion cells injected with pure oxygen or air. The oxygen diffusing through the film inside the camera, refer to the sensor, which determines the diffusion rate of oxygen.

Tests for determining the permeability to air is conducted according to the following method. Thin vulcanized test specimens from samples of tracks mounted in diffusion cells and kondicionirovanie on an oil bath at 65°C. To determine the permeability of the sample to air noted the time required for penetration of air through it. The test samples consisted of a circular plate with a diameter of 12.7 cm and a thickness of 0.38 mm Error 2σ) when determining the permeability is ±0,245 (×10-8) % Other test methods are presented in table 2.

Examples

The composition is 1 to 15 (tables 3 through 5) are examples of benefits achieved by the introduction polybutene softener in a mixture isobutilene copolymers containing kilometerstirana balance. Compositions 1, 6 and 11 are examples of halogenated isobutylene/p-methylstyrene copolymers comprising different amounts of halogen and the number of parts of p-methylstyrene (p-MS) (see table 3). Songs that have introduced product PARAPOLpossess superior breathability, while improving or maintaining the technological properties such as strength before treatment and the values of the ratio of the fatigue/fracture (tables 6 through 8).

Songs from 16 to 21 (table 9) are examples of the advantages achieved by the introduction polybutene softener in the mixture of polymer isobutilene basis, such as GTB, with another rubber such as natural rubber, and an exfoliating clay. Composition 16 consists of one GSUB (SBB-6222, 100 ppm 100), and the composition contains 17 natural rubber and only product PARAPOL(90 ppm 100 GOITER, 10 ppm 100 natural rubber). Generally, halogenated rubbers, such as GSOB have targeted low permeability in comparison, for example, with only one natural rubber. When these songs add natural rubber, breathability, as is known, increases, in particular as set out in working the Ah Inner Liners for High Performance Tires, C.W. van Hellens in Proceedings of the Rubber Division, American Chemical Society (Indianapolis, Indiana, may 1984) and Bromobutyl and Chlorobutyl: A Comparison of Their Chemistry, Properties and Uses, W.Hopkins, R.H.Jones, J.Walker in International Rubber Conference Proceedings 205 (Kyoto, October 1985). However, as can be seen in composition 17, in the case of polybutene breathability is maintained or improved, even when the composition contains natural rubber.

Adding exfoliating clays can further improve the permeability of these halogenated elastomer compositions. In the composition from 18 to 21 was injected different amounts exfoliating clay. Presented data show that natural rubber improves processability GSUB (tables 10A and 10B). Further improve the permeability (lower values) is achieved by the addition of clay and product PARAPOL. The introduction of a naphthenic oil (CALSOLin composition 19 in fact leads to an undesirable increase the permeability of the mixture.

Songs from 22 to 23 (table 11) are examples of the advantages achieved by the introduction polybutene softener in elastomeric blend of natural rubber, isobutilene copolymers containing kilometerstirana balance, and exfoliating clay. Presented data show that adding product PARAPOLtechnological properties improve who are, or remain, while the permeability is reduced.

Songs from 24 to 28 (table 12) are further examples of the benefits achieved by the introduction polybutene softener in elastomeric blend of natural rubber, isobutilene copolymers containing kilometerstirana balance, and exfoliating clay. Again softner PARAPOL, polybutene, improves the properties of the pneumatic diaphragm from such mixtures while maintaining or improving their technological properties. For example, the values of the ratio of the fatigue/fracture of the composition adding product PARAPOLimproved, and the durability to handle (tables 13A and 13B). Compositions 27 and 28 are preferred elastomeric mixtures with themselves low values of permeability when the product is EXXPRO89-4 contained with the product SBB-622, natural rubber and product PARAPOL.

Song from 29 to 44 are examples of the advantages achieved by the introduction polybutenes a softener in different mixtures of copolymers on isobutilene basis. Song from 29 to 32 are a mixture of the brominated butyl rubber (Bromobutyl 2222) with the product PARAPOLtogether with clays and without them. Presented data show that the addition of a product PARAPOLin song (to the position 31) and without (composition 30) stratifying clay improves technological properties, such as fatigue fracture, while increasing values of permeability. Compositions with clay, and polybutene possess improved properties in comparison with other bronirovannymi butyl rubber compositions.

Composition 33 to 36 are examples of the application of elastomers EXXPROcontaining the links of p-MS in an amount of 5 wt.% in terms of the whole copolymer. Presented data show that the addition of only one polybutene softener (song 34) improves the quality of the mixture for pneumatic diaphragm and adding only one exfoliating clay (track 35) improves quality pneumatic diaphragm. Add as polybutenes softener, and clay (track 36) improves quality pneumatic diaphragm. Technological properties of mixtures with product EXXPROwith 5 wt.% parts of p-MS improve when contains polybutene and clay (independently or together), as evidenced by, for example, values of strength before treatment and the values of the fatigue fracture.

Songs from 37 to 40 are examples of applications of elastomers EXXPROcontaining the links of p-MS in the amount of 7.5 wt.% in terms of the whole copolymer. In General, when adding a product PARAPOLand/or stratifying clay permeability Ulu who agrees. Finally, the composition of 41 to 44 are examples of the application of elastomers EXXPROcontaining the links of p-MS in the amount of 12 wt.% in relation to the entire copolymer. Again adding polybutene PARAPOLand/or stratifying clay improves breathability, as well as technological properties. In addition, in comparison with the copolymers with 7.5 wt.% parts of p-MS improves the values of the fatigue fracture of the copolymer with 12 wt.% parts of p-MS.

The introduction of polybutene in the composition of bromobutyl rubber, brominated isobutylene/p-methylstyrene copolymer and nanoglide accompanied by a trend towards improvement in air permeability, as demonstrated by the compositions from 29 to 44 in table 15B. In one embodiment, the air permeability (at 65° (C) in these compositions is in the range from 1.20×10-8to 1.90×10-8cm3·cm/cm2··at and from 1.30×10-8to 1.8×10-8cm3·cm/cm2··at another option.

In the General introduction polybutenes a softener having srednekamennogo molecular weight of from 400 to 6000 in one embodiment, and a viscosity of 10 to 10,000 Centistokes at 100°in another embodiment, improves the durability to handle and improves or maintains processability, and also improves (lowers) the permeability. For example, the introduction polybut is on the composition of the elastomer improves (increases) the value of the fatigue fracture. In particular, when the composition of the elastomer/nanoglide add polybutene, improved values of the ratio of the fatigue fracture.

In one embodiment, the compositions of elastomeric nanocomposites nanocomposite, where the elastomer is a bromobutyl rubber, is the fatigue/fracture to aging exceed 40000 units exceed 50000 in another embodiment, however, exceed 60000 in yet another variant. In another embodiment, when the elastomer is a commercially available brominated isobutylene/p-methylstyrene copolymer, the values of the fatigue fracture exceeds exceeds 70,000 and 80,000 in another embodiment. The ascending order of values in the fatigue/fracture at the introduction of polybutene in the composition is particularly advantageous in the presence of clays, because adding clay in the elastomer, these values attach a tendency to decrease. In another embodiment, the elastomeric compositions strength to handle more than 45% and more than 50% in another embodiment. These values can, of course, to further improve the change quantities of the various components in the compositions or the viscosity and/or molecular weight of polybutene.

Variants of the final nanocomposites nanocomposite of the present invention can be used as a pneumatic diaphragms, such as used in the manufacture of the inner shells or chambers for car tire or hose for automobiles. the AK, in particular, these nanocomposites can be used in the material of the inner shell such products as tires for trucks, tires for buses, car tyres, motorcycle tires, flotation tires, etc. Increased resistance against thermal aging of the proposed composition for the inner shells of the tire makes it particularly suitable for use in tires for trucks to increase the acceptability of tires for retreading.

Although the present invention is described and illustrated with reference to specific ways of its implementation, to the ordinary person skilled in the field of technology is apparent that the invention leads to many different variants, which in the present description is not illustrated. For these reasons, in order to determine the actual scope of the present invention should apply only to the attached claims.

All mentioned in the present description priority documents included in full in accordance with all jurisdictions in which such incorporation permit. Moreover, in accordance with all jurisdictions in which such incorporation allow, in the present description in full includes all mentioned in the present description documents, and test methods.

1. An elastomeric composition comprising an elastomer, a filler, a stratified clay and polybutenes softner with srednekamennogo molecular weight of from 400 to 10,000, and a vulcanizing agent.

2. The composition according to claim 1, in which the elastomer is a statistical copolymer comprising link derivateservlet from samanaleya with4With7.

3. The composition according to p., in which the elastomer is chosen from halogenated isobutylene/p-methylstyrene copolymer, halogenated star-shaped butyl rubber, halogenated butyl rubber and mixtures thereof.

4. The composition according to claim 3, in which the elastomer is chosen from halogenated isobutylene/p-methylstyrene copolymer containing from 0.1 to 5.0 wt.% p-bromoethylene groups in terms of the weight of the copolymer.

5. The composition according to claim 1, in which the polybutene is contained in an amount of from 2 to 40 ppm 100.

6. The composition according to claim 1, in which the polybutene at 100°has a viscosity from 10 to 6000 cSt. (ASTM D445-97).

7. The composition according to claim 1, additionally comprising a thermoplastic resin.

8. The composition according to claim 1, in which the filler is selected from calcium carbonate, clay, mica, silica and silicates, talc, titanium dioxide, starch and other organic fillers such as wood flour, carbon black and mixtures thereof.

9. The composition according to claim 1, in which the layered clay selected from a stratified natural or synthetic montmorillonite, nontronite, beidellite, volkonskoit, laponite, hectorite, saponite, Aconite, magarita, kenyata, stevensite, vermiculite, halloysite, aluminated, hydrotalcite and mixtures thereof.

10. The composition according to claim 1, in which polybutenes softening agent is a copolymer of units, deri is alizirovannaya of isobutylene, and links, derivatizing from 1-butene.

11. The composition according to claim 4, further including additional elastomer selected from natural rubber, composition of polyisoprene rubber, styrene butadiene rubber (BSC), polybutadiene rubber, isoprene-butadiene rubber (CSI), sterilizable-butadiene rubber (SIBC), ethylene-propylene rubber, ethylene-propylene-diene rubber (tapd), polysulfide, nitrile butadiene rubber, propylenoxide polymers, star-shaped butyl rubber and halogenated star-shaped butyl rubber, brominated butyl rubber, chlorinated butyl rubber, star-shaped polyisobutylene rubber, star of the brominated butyl rubber (polyisobutylene-isoprene copolymer, isobutylene-methylstyrene copolymers such as isobutylene/meta-bromomethylbiphenyl, isobutylene-bromomethylbiphenyl, isobutylene-chloromethylstyrene, halogenated isobutylene-cyclopentadiene, isobutylene-chloromethylstyrene and mixtures thereof.

12. Pneumatic diaphragm, such as the inner shell for bus, containing the composition according to claim 1.

13. The method of obtaining the elastomeric composition according to claim 1, comprising combining the elastomer, filler, stratified clay, polybutenes softener with srednekamennogo molecular weight of from 400 to 1000, and vulcanizing agents and vulcanization of the blend composition.



 

Same patents:

FIELD: rubber industry; automotive industry; production of the sealing layer at manufacture of the tubeless tires and the pneumatic constructions.

SUBSTANCE: the invention is pertaining to rubber industry and the automotive industry and is dealt with production of the sealing layer at manufacture of the tubeless tires and the pneumatic constructions. The rubber mixture contains the isoprene rubber, the filled chlorbutyl rubber produced by interaction at comixing of the butyl rubber and the hlorinated hydrocarbon of the common formulaСnН(2n+2)С1х, where n = 10-30, х = 7-24, at the temperature of 80-150°С at the presence of the colloid silicon dioxide introduced into the mixture in the process of their comixing, brimstone, the sulfonamide accelerant, the stearic acid, zinc oxide, the high-pressure polyethylene, the engineering carbon, the alkylphenolamide resin. The technical result of the invention consists in the increased protection of the rubber mixture from the possible premature vulcanization in the processes of its preparation and reprocessing.

EFFECT: the invention ensures the increased protection of the rubber mixture from the possible premature vulcanization in the processes of its preparation and reprocessing.

2 tbl, 1 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to elevated-viscosity thermoplastic halogenated elastomer compositions and to a process for preparing the same. Composition according to invention contains thermoplastic polymer, at least one isoolefin copolymer comprising unit derived from halomethylstyrene, and at least one hindered amine or phosphine compound having the respective structure R1R2 R3N or R1R2R3P wherein R1 is H or C-1-C6-alkyl, R2 is C1-C30-alkyl and R3 is C4-C30-alkyl and further wherein R3 represents alkyl higher than R-1. A process for preparing elevated-viscosity thermoplastic composition consists in mixing thermoplastic polymer, at least one isoolefin copolymer comprising unit derived from halomethylstyrene, and at least one hindered amine or phosphine compound to obtain thermoplastic elastomer compositions, including dynamically cured ones, containing more finely dispersed elastomer.

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4 cl, 10 tbl

Rubber composition // 2254348

FIELD: rubber industry.

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EFFECT: increased shock-absorbing capacity of products.

14 cl, 5 dwg, 5 tbl, 3 ex

FIELD: plastic, rubber, chemical, petrochemical, paint-vehicle, air and other industrials.

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EFFECT: butene-1 (co)polymer, article and composition therefrom with increased controlling strength, elasticity, fire-retarding, as well as controlling flow point, percent elongation, etc.

FIELD: plastic, rubber, chemical, petrochemical, paint-vehicle, air and other industrials.

SUBSTANCE: halogenated or halosulfonated butene-1 (co)polymer is obtained in tetrachloroethane or chlorobenzene solution and contains chemically coupled chlorine and/or bromine, or chlorine and sulfur, or bromine and sulfur, or simultaneously chlorine, bromine and sulfur in form of groups -SO2Cl and -SO2Br, wherein content of chlorine and/or bromine and sulfur is 1-73 mass % and 0,2-4,0 mass %, respectively. Also disclosed are polymer, elastomer composition, binding agent and articles based on halogenated and halosulfonated butene-1 (co)polymer.

EFFECT: butene-1 (co)polymer, article and composition therefrom with increased controlling strength, elasticity, fire-retarding, as well as controlling flow point, percent elongation, etc.

9 cl, 19 tbl, 6 dwg

FIELD: polymer materials.

SUBSTANCE: invention, in particular, relates to isobutylene-based halogenated polymers showing elevated pre-treatment strength and elevated impermeability as well as to and a method for preparation thereof. Non-cured thin barrier layer for rubber products comprises 3-95% isobutylene-based polymer and 95-3% semicrystalline polymer having melting temperature from about 25 to about 105°C and melting heat from about 9 to about 50 J/g as measured by differential scanning calorimetry. This barrier layer is used for inside tire envelope and as inner tube. Rubber compound contains semi-crystalline propylene polymer with about 75 wt % propylene units and is prepared on common rubber manufacture equipment.

EFFECT: improved pre-treatment strength, pre-treatment elongation, and pre-treatment relaxation properties at elevated temperature and improved aging resistance and barrier properties.

35 cl, 8 tbl

Polymer composition // 2084473
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Polymer composition // 2045552
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FIELD: rubber industry; automotive industry; production of the sealing layer at manufacture of the tubeless tires and the pneumatic constructions.

SUBSTANCE: the invention is pertaining to rubber industry and the automotive industry and is dealt with production of the sealing layer at manufacture of the tubeless tires and the pneumatic constructions. The rubber mixture contains the isoprene rubber, the filled chlorbutyl rubber produced by interaction at comixing of the butyl rubber and the hlorinated hydrocarbon of the common formulaСnН(2n+2)С1х, where n = 10-30, х = 7-24, at the temperature of 80-150°С at the presence of the colloid silicon dioxide introduced into the mixture in the process of their comixing, brimstone, the sulfonamide accelerant, the stearic acid, zinc oxide, the high-pressure polyethylene, the engineering carbon, the alkylphenolamide resin. The technical result of the invention consists in the increased protection of the rubber mixture from the possible premature vulcanization in the processes of its preparation and reprocessing.

EFFECT: the invention ensures the increased protection of the rubber mixture from the possible premature vulcanization in the processes of its preparation and reprocessing.

2 tbl, 1 ex

FIELD: polymers, in particular transparent and colorable elastomer compositions.

SUBSTANCE: claimed composition being base of master batch contains at least one elastomer with units derived from C4-C7-isoolefin and p-methylstyrene; at least one non-carbon black filler; and polybutene softener with number average molecular mass (Mn) from 400-10000. Method for production of said composition includes combining of components thereof.

EFFECT: elastomer composition with improved adhesion ability and attrition strength without losses of transparency and colorability.

22 cl, 16 tbl, 12 ex

FIELD: rubber industry; production of elastomer compositions on base of ethylene-propylene-diene rubber; production of roofing materials for hydraulic insulation of buildings, bridges, tunnels, roof coats.

SUBSTANCE: proposed rubber mix contains the following components: ethylene-propylene-diene rubber, butyl rubber or regenerate on base of butyl rubber, anti-oxidant, plasticizing agent (paraffin, mineral oil, chloro-paraffin), commercial carbon, chalk and/or kaolin and bitumen, colophony or benzoic acid, if necessary. Rubber mix may also contain Captax (rubber accelerating agent), thiuram or zinc ethyl diethyl dithiocarbomate, antimony trioxide, aluminum hydroxide, stearic acid and zinc oxide at definite ratio. Rubber mix is prepared on standard equipment of rubber industry.

EFFECT: enhanced resistance to burning and frost.

4 cl, 4 tbl

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to isobutylene-base polymeric composition, namely to mixtures of semicrystalline ethylene copolymers with brominated butyl rubber. Semicrystalline ethylene copolymers represent a statistic copolymer prepared from ethylene monomers, one or some other monomers taken among the order comprising alpha-olefins comprising from 4 to 10 carbon atoms and optionally one or some dienes. Semicrystalline ethylene copolymer comprises ethylene links in the amount, at least, 45 wt.-% as measured for mass of this semicrystalline copolymer. Polymeric composition is prepared by mixing isobutylene-base polymer and semicrystalline ethylene polymer and the polymeric composition can comprise additionally amorphous polymer, oil, low-molecular polybutenes, antioxidants, stabilizing agents, filling agents, pigments and carbon black. Prepared polymeric mass shows the stress value from 0.1 to 1 MPa at elongation of sample by 100% at 50°C, air penetrability of vulcanized mixture is less 8 x 10-8 cm3 x cm/cm2 x s x atm at 65°C.

EFFECT: improved properties of mixtures.

4 cl, 5 tbl

FIELD: polymers, in particular diene rubber compositions reinforced with carbon white for production of pneumatic tire and intermediate therefor.

SUBSTANCE: sulfur-vulcanizing rubber composition for pneumatic tire production includes at least one diene elastomer (A component), carbon white as reinforcing filler (B component), binder of carbon white/elastomer having at least two functional groups, named as "X" and "Y" (C component), which may be grafted on the one side to carbon white via Y group, and on the other side to elastomer via X group, wherein X group represents α,β-unsaturated fatty acid ester having carbonyl group of general formula X 1 in γ-position. In formula R, R1 and R2 are monovalent hydrocarbon radical or R1 and R2 may be additionally hydrogen atoms. Also disclosed are pneumatic tire in raw and cured form, semimanufactured tire, in particular thread running surface from said rubber composition. Method for production of rubber composition, method for binding of carbon white with diene elastomer includes thermomechanical blending of A, B, and C components in one or more steps up to maximum temperature of 110-190°C.

EFFECT: rubber composition with improved hysteretic properties, high mechanical and technological characteristics; pneumatic tires and intermediates made of the same with low rolling resistance and increased endurance.

30 cl, 3 dwg, 6 tbl, 4 ex

FIELD: polymer materials.

SUBSTANCE: invention, in particular, relates to isobutylene-based halogenated polymers showing elevated pre-treatment strength and elevated impermeability as well as to and a method for preparation thereof. Non-cured thin barrier layer for rubber products comprises 3-95% isobutylene-based polymer and 95-3% semicrystalline polymer having melting temperature from about 25 to about 105°C and melting heat from about 9 to about 50 J/g as measured by differential scanning calorimetry. This barrier layer is used for inside tire envelope and as inner tube. Rubber compound contains semi-crystalline propylene polymer with about 75 wt % propylene units and is prepared on common rubber manufacture equipment.

EFFECT: improved pre-treatment strength, pre-treatment elongation, and pre-treatment relaxation properties at elevated temperature and improved aging resistance and barrier properties.

35 cl, 8 tbl

The invention relates to the production of materials designed to absorb vibration vehicles

The invention relates to sealing compositions and applies, in particular, in the construction for sealing joints and leaks in vehicles

The invention relates to the manufacturing of artificial leather and can be used in the manufacture of materials for technical use, operated for a long time outdoors, especially in conditions of high humidity

The invention relates to ionomer polymer mixture, in particular the partially crosslinked thermoplastic and elastomeric polyolefin blends having a low hardness

FIELD: polymer materials.

SUBSTANCE: mixture, in particular, is stabilized by system containing lactone, spatially hindered phenol, and phosphite. Mixture can be processed at temperature above 330°C resulting in increased heat resistance of optical data carriers without loss in molecular weight of polymer.

EFFECT: improved heat-resistance characteristics.

9 cl, 2 tbl

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