Auto tire

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Tire comprises side strip, carcass and crimp section Side strip is made from rubber mix (A) including rubber components (A) including (a1): 35 to 65 wt % of natural rubber and/or isoprene rubber, (a2): 15 to 55 wt % of butadiene rubber modified by tin or S-butadiene rubber and (a3): 0 to 50 wt % of butadiene rubber including syndiotactic crystals, epoxy natural rubber or modified butadiene-styrene rubber; 20 to 40 wt % of filler (A2). Filler is selected from group consisting of carbon black, silicon dioxide and calcium carbonate, or combination thereof per 100 wt % (A1). Rubber mix (A) also comprises vulcanising agent. Note here that complex elastic modulus E* varies from 2.0 to 3.5 MPa and tan δ makes less than 0.12. Rubber mix to cover carcass cord (B) comprises rubber component (B1), comprising (b1): 50 to 80 wt % of natural rubber and/or isoprene rubber, (b2): 20 to 45 wt % of diene rubber selected from modified butadiene-styrene rubber bonded with tin or silicon, modified butadiene-styrene rubber containing primary amino group or alkoxysilyl group modified by tin or S-modified butadiene rubber and epoxy natural rubber. Note here that amount of bound styrene makes 5-30 wt %. Rubber mix (B) also comprises 20-40 wt % of filler per 100 wt % of B1 and vulcanizing agent. Rubber mix for crimp section (C) contains rubber component (C1) containing 30-50 wt % of natural and/or isoprene rubber, 15-70 wt % of tin- or S-modified butadiene rubber, and 0-55 wt % of butadiene rubber including syndiotactic crystals, and 35-80 wt % of filler per 100 wt % of C1, and vulcanising agent. Complex elastic modulus E* of rubber mix (C1) varies from 4.5 to 9.0 MPa and tan δ makes less than 0.12.

EFFECT: low rolling resistance and higher strength.

4 cl, 5 tbl, 48 ex

 

The present invention relates to a tire with reduced rolling resistance and improved strength.

The low cost of fuel in the car traditionally receive, reducing the rolling resistance tires (improving characteristics of rolling resistance). The requirement of low cost fuel in the car recently tightened more and more, and required properties low dissipation. For example, as a method of reducing the rolling resistance tyres, carry out the reduction of the loss tangent tan δ of the rubber tread, sidewall, broker and crimp part, in ascending order of detention in these rubber elements.

In an attempt to reduce the rolling resistance of bus parts, for example as described in patent document 1, a modified tin butadiene rubber used for the rubber mixtures of the sidewall as a rubber component, and, as described in patent document 2, butadiene-styrene rubber, modified by polymerization in solution, and/or a butadiene rubber modified with tin, is used as the rubber component of the rubber mixture for coating steel cords of the carcass.

As a method of reducing the loss tangent tan δ sidewall mention a way to reduce the amount of filler in the mixture, the method of increasing the diameter of the soot particles and method of administration in cm is camping a modified butadiene rubber, but this reduces the elongation at break. Moreover, as a method of reducing the loss tangent tan δ of the rubber crimp part also mention a way to reduce the number of filler mixture, the method of increasing the diameter of the soot particles and the method of introduction of a modified butadiene rubber, but the elongation also decreases; therefore, it may corrupt the curb and damage when installed on the rim and, in addition, there is wear from the friction of the rim.

Thus, it is difficult to satisfy simultaneously the requirements of reducing rolling resistance and increasing the elongation at break and there is a need for tires with low rolling resistance and high strength.

[Patent document 1] unexamined patent application of Japan No. 5-320421

[Patent document 2] unexamined patent application of Japan No. 2007-161819

The purpose of this invention is the provision of a bus that meets the requirements of both low rolling resistance and high strength.

The present invention relates to a tire containing the sidewall, the frame and the clamp part. The sidewall is made of a rubber mixture (A)containing a rubber component (A1)comprising (A1): from 35 to 65 wt.% natural rubber and/or isoprene rubber (A2): from 15 to 55 the AC.% modified tin butadiene rubber or S-modified butadiene rubber and (A3)from 0 to 50 wt.% butadiene rubber, including syndiotactic crystals, epoxidizing natural rubber or a modified styrene-butadiene rubber; from 20 to 40 wt. parts of filler (A2)selected from the group consisting of carbon black, silica and calcium carbonate, or a combination of at least two of these substances, per 100 wt. parts of the rubber component (A1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 2.0 to 3.5 MPa and a loss tangent tan δ is less than 0.12. Cord of the carcass is covered with a rubber mixture (C) to cover the casing fabric containing rubber component (B1)includes (b1)from 50 to 80 wt.% natural rubber and/or isoprene rubber (b2)from 20 to 45 wt.% at least one diene rubber selected from the group consisting of modified styrene-butadiene rubber, associated with tin or silicon, modified the best choice of rubber containing a primary amino group or alkoxysilyl group modified with tin or S-modified butadiene rubber and epoxidizing natural rubber, and these modified best choice rubbers have the content of the bound styrene, from 5 to 30 wt.%; from 20 to 40 wt. parts of filler (B2)selected from the group consisting of carbon black, dioxide to Omnia and calcium carbonate, or a combination of at least two of these substances, per 100 wt. parts of the rubber component (B1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 2.0 to 3.5 MPa and a loss tangent tan δ is less than 0.12. The crimp portion is made of a rubber compound (C)containing a rubber component (C1)includes (C1): from 30 to 50 wt.% natural rubber and/or isoprene rubber, (C2): from 15 to 70 wt.% modified tin butadiene rubber or S-modified butadiene rubber and (C3)from 0 to 55 wt.% butadiene rubber, including syndiotactic crystals; from 35 to 80 wt. parts of filler (C2))selected from the group consisting of carbon black, silica and calcium carbonate, or a combination of at least two of these substances, per 100 wt. parts of the rubber component (C1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 4.5 to 9.0 MPa and a loss tangent tan δ is less than 0.12.

In the rubber blend (A) for sidewall preferably use natural rubber (A1), modified tin butadiene rubber (A2) and carbon black, specific surface, measured from the adsorption of nitrogen (N2UE), is less than 45 m2/g, as (A2).

Rubber is a mixture of (C) to cover the casing fabric preferably use natural rubber as (b1), modified styrene-butadiene rubber (b2) and carbon black with silica as (B2).

In the rubber compound (C) for crimping portion preferably use natural rubber as (C1), modified tin butadiene rubber (C2), butadiene rubber, including syndiotactic crystals, as (C3), and carbon black, specific surface, measured from the adsorption of nitrogen (N2Yn)is of at least 45 m2/g, and silicon dioxide, the specific surface, measured from the adsorption of nitrogen (N2UE), is at least 40 m2/g, as (C2).

The tire according to the present invention includes a sidewall that includes a rubber blend (A) for sidewall, with the specified composition and properties, the frame with cord, covered by a rubber mixture (C) to cover the cords of the carcass with the specified composition and properties, and the crimp portion comprising a rubber mixture (C) for crimping part with the specified composition and properties. Corresponding parts described below.

The rubber mixture (A) to sides

The rubber mixture (A) to the sidewall of the present invention contains a rubber component (A1) and the filler (A2).

The rubber component (A1) includes (A1): natural rubber (NC) and/or isoprene rubber (IR), and (A2): modified butadiene ka is Chuk (modified Bq).

NC is not restricted to a specific form, can be used the rubber, which is mainly used in rubber industry, and in particular using RSS#3 and TSR20.

Moreover, IR is not restricted to a specific form, can be used the rubber, which is mainly used in the tire industry.

The content of the TC and/or IR (A1) in the rubber component (A1) is at least 35 wt.% and preferably at least 40 wt.%, because you get a high elongation at break. Moreover, the content of the TC and/or IR (A1) in the rubber component (A1) is not more than 65 wt.% and, preferably, not more than 60 wt.%, since it is necessary to add an effective amount of the modified BC, with high humidity.

Modified Bq is chemically modified terminal group of butadiene rubber and high strength of the chemical bond between the polymer and soot, and as preferred examples of the modified tin Bq and S-modified Bq.

In relation to the rubber mixture for sidewall among these modified Bq preferred is a modified tin Bq obtained by polymerization of 1,3-butadiene with a lithium initiator and then adding a compound of tin, in which the end group modi is Anna molecules Bq connected with tin-carbon connection.

Lithium initiator include lithium compounds such as alkyllithium, abillities, vinyllithium, organo-tin-lithium and nitrogen lithium compounds, and metallic lithium. Modified Bq with a high vinyl content and a low content of the CIS isomer can be obtained by using a lithium initiator as an initiator modified Bq.

The tin compounds include tin tetrachloride, trichloride butyanova, dichloride dibutylamine, dichloride dactylology, the presence of TBT chloride, chloride triphenylamine, diphenyldiisocyanate, ethylate triphenylamine, diphenylmethylene, chloride detailrow, dioctanoyl diphenylurea, divinylacetylene, tetrabenzoate, distearate dibutylamine, tetraallylsilane and p-tributylamine styrene. These tin compounds can be used alone or at least two kinds may be used in combination.

The content of tin atoms in a modified Bq is preferably at least 50 ppm (parts per million), and more preferably at least 60 ppm. If the content of tin atoms is less than 50 ppm, the effect of facilitating the dispersion of carbon black in a modified BK tends to decrease, a tan δ tends to increase. In addition, the content of tin atoms is preferably not more than 3000 ppm, more preferred is entrusted not more than 2500 ppm and even more preferably not more than 250 ppm. If the content of tin atoms exceeds 3000 ppm, cohesive ability to mix billet is reduced, and the edges can be decorated; thus extrusion properties beaten blanks tend to deteriorate.

The molecular weight distribution (Mw/Mn) of the modified tin Bq is preferably not more than 2 and preferably not more than 1.5. If Mw/Mn of the modified tin Bq exceeds 2, the dispersibility of carbon black deteriorates and tan δ tends to increase.

The amount of vinyl bonds in the modified tin Bq is preferably at least 5 wt.% and, more preferably, at least 7 wt.%. If the amount of vinyl bonds in the modified tin Bq is less than 5 wt.%, it can be difficult to carry out the polymerization of (getting) a modified BC. Moreover, the amount of vinyl linkages is preferably not more than 50 wt.% and more preferably not more than 20 wt.%. If the amount of vinyl bonds in the modified tin Bq exceeds 50 wt.%, the dispersibility of carbon black deteriorates and the tensile strength will be reduced.

As modified by tin Bq satisfying the above conditions can be mentioned, for example, BR1250H, manufactured by Zeon Corporation.

S-modified polybutadiene rubber is a product, the floor is Emim modification of polybutadiene and represents a butadiene rubber, modified celanova connection; it differs from the modified butadiene rubber (modified BSK)obtained by modification of styrene-butadiene rubber, described below.

S-modified Bq includes, for example, S-modified Bq, manufactured by Sumitomo Chemical Co., Ltd.

The content of the modified BC (A2) in the rubber component (A1) is at least 15 wt.% and, preferably, at least 20 wt.%, as tan δ can be reduced. The content of the modified BC (A2) in the rubber component (A1) is not more than 55 wt.% and, preferably, not more than 50 wt.%, as the effect of heat during the extrusion process can be suppressed, and the effect of reducing tan δ reaches its maximum extent and is not increased even with the introduction of a mixture of larger amounts of this component.

Further, as another rubber (A3)in the rubber component (A1) can be entered butadiene, including syndiotactic crystals (VCR), epoxydecane natural rubber (EHC) and the modified BSC.

Here syndiotactic crystals implies, for example, syndiotactic-1,2-polybutadiene fibers. The density of the stitching can be reduced by incorporating a VCR, even if you get the same complex elastic modulus E*, and if this can be improved PR is durability, durability, resistance to abrasive wear and property distribution of cracks.

Content syndiotactic crystals in VCR is preferably from 1 to 25 wt.% and, more preferably, from 5 to 20 wt.%. If the content is less than 1 wt.%, syndiotactic component is too small, and possibly will not receive the necessary rigidity, and if the content exceeds 25 wt.%, durability is reduced due to the fact that syndiotactic component form large aggregated fragments in the polybutadiene. VCR includes VCR-303, 412, and 617, manufactured by Ube Industries Ltd.

If the VCR is introduced into the mixture as another rubber (A3), its content in the rubber component (A1) is preferably not more than 50 wt.%, even not more than 45 wt.%, because the properties of the heat dissipation will be good. Moreover, it is preferable content of at least 10 wt.%, and more preferably not more than 15 wt.%, because when the abrasive wear resistance and E* will be good.

As EHC can be used commercially available ENCS and you can epoxidizing NC for use. The way epoxidation NC is not limited to particular types, and it can be done using methods such as treatment with chlorhydrin, the method of direct oxidation treatment with hydrogen peroxide, processing Alki what hydroperoxide and processing percolate. As a method of processing percolate should be mentioned, for example, the mode of interaction of organic percolate, such as peracetic acid and paranavitana acid, with NK.

The degree of epoxidation EHC is preferably at least 10 mole% of and, more preferably 20 mole percent. If the degree of epoxidation EHC is less than 10 mole percent, prevulcanized will become large, and the resistance to crack formation will be reduced. Moreover, the degree of epoxidation EHC is preferably not more than 60 mole.% and, more preferably 50 mole percent. If the degree of alexeievna EHC exceeds 60 mole.%, adaptability when mixing and workability of the sheet will be reduced.

EH, satisfy this condition, not limited to a specific type, but includes, in particular, ENR-25 and ENR-50 (Kumplan Guthrie Berhad). EHC can be used separately, and at least two types can be used in combination.

If EH is introduced into the mixture as another rubber (A3) in the rubber component (A1), its content is preferably at least 15 wt.% and, more preferably, at least 20 wt.%, because when the resistance to crack propagation is excellent. Moreover, the content of EHC in the rubber component (A1) is not more than 50 wt.% and, preferably, not more than 5 wt.%, because when the elongation at break is superior.

Examples of the filler (A2) include carbon black, silica and calcium carbonate, and these substances can be used alone, and at least two types can be used in combination. Among them, carbon black is preferred, because when the elongation at break, ozone resistance and weather resistance are excellent.

The quantity in the mixture of filler (A2) is at least 20 wt. parts per 100 wt. parts of the rubber component (A1), and preferably at least 23 wt. part, because when the elongation at break, the machinability of the sheet and the processability during extrusion are excellent. Moreover, the quantity in the mixture of filler (A2) is not more than 45 wt. parts per 100 wt. parts of the rubber component (A1), and preferably not more than 40 wt., parts, because tan δ can be reduced.

Specific surface of the carbon black measured from the adsorption of nitrogen (N2UE), is preferably at least 20 m2/g and, more preferably, at least 30 m2/g, because the elongation and workability are excellent. N2Pack of carbon black is preferably less than 45 m2/g and more preferably less than 42 m2/g because it tan δ to be reduced. The preferred carbon black include, for example, N550 and N660.

Silicon dioxide can be used in combination with soot. When using such combinations, if silicon dioxide is from about 25 to 50 wt. parts per 100 wt. parts of carbon black, the machinability of the sheet is improved and the elongation at break is additionally improved.

N2Pack of silicon dioxide is preferably at least 40 m2/g and, more preferably, at least 50 m2/g, because when the elongation at break is superior. Moreover, N2Pack of silica is preferably not more than 200 m2/g and, more preferably, not more than 180 m2/g, because the effect of reducing tan δ (low heat generation) is excellent.

In particular silicon dioxide includes Ultrasil VN3, manufactured by Degussa Corporation, Z115GR manufactured by Rhodia S.A., and Ultrasil 360, manufactured by Degussa Corporation. When using silicon dioxide, in combination with it, you can use a silane bonding agent. Silane binding agent described below.

The rubber mixture (A) to the sidewall of the present invention may respectively include additives, mainly used in the tire industry, such as, for example, a vulcanizing agent such as sulfur, vulcanization accelerator, zinc oxide, antioxidant, aromatic Mac is on, stearic acid and wax, in addition to the rubber component (A1) and the filler (A2).

The complex elastic modulus E*measured at 70°C., is preferably at least 2.0 MPa, more preferably at least 2.5 MPa and, more preferably, at least 2,7 MPa, due to the fact that the rubber mixture for the sides (A) of the present invention has an excellent elongation at break. Moreover, the complex elastic modulus E*measured at 70°C. is preferably not more than 3.5 MPa, more preferably not more than 3.3 MPa, due to the fact that the rubber mixture for the sides (A) easily bent and has low rolling resistance when a load is applied.

The lower tan δ, measured at 70°C., especially preferred compound (A) to the sidewall of the present invention, but the lower limit is typically 0,03. Moreover, the loss tangent, tan δ, measured at 70°C, preferably less than 0.12 and more preferably not more than 0.11, because when the rubber mixture for the sides (A) has a low tan δ and excellent characteristics of low heat dissipation and low rolling resistance.

Here, under the complex elastic modulus E* and loss tangent tan δ, measured at 70°C, mean complex modulus (E*) and the tangent of the angle p is losses (tan δ), measured under the following conditions: a temperature of 70°C., frequency of 10 Hz, initial strain of 10% and dynamic strain of 2% in the measurement of viscoelastic properties by means of the spectrometer.

(C) Rubber compound for covering the casing fabric

The rubber mixture (C) to cover the casing fabric used in the present invention, includes a specific rubber component (B1) and the filler (B2).

The rubber component (B1) includes (b1): natural rubber (NC) and/or isoprene rubber (IR), (b2)at least one diene rubber selected from the group consisting of a modified butadiene rubber (modified BSC), a modified butadiene rubber (modified Bq) and epoxidizing natural rubber (EHC) and (b3): another rubber, if necessary.

NK and IK in (b1) is not limited to a specific type, and preferably you can use the TC and IR, described in the case of rubber compounds (A) to the sides.

The content of the TC and/or IR (b1) in the rubber component (B1) is at least 50 wt.% and, preferably, at least 55 wt.%, because when the elongation at break is superior. Moreover, the content is not more than 80 wt.% and, preferably, not more than 75 wt.%, because even add an effective amount of diene rubber (b2), excellent for long is enosti at high temperature (from 150 to 250°C) and properties of prevalently.

Diene rubber (b2) is at least one rubber selected from the group consisting of modified BSK modified BC and EH.

Modified BSK is a polymer, where in the end the group of styrene-butadiene polymer or in the polymer chain entered the modifying group having a strong interaction with the silicon dioxide or soot.

As modified BSK are preferred these types, which have a small amount of bound styrene, for example HPR340, manufactured by JSR Co., Ltd.

The amount of bound styrene in modified BSK is preferably at least 5 wt.% and, more preferably, at least 7 wt.%, because when the property prevalently in the preparation of the rubber mixture is optimal. Moreover, the amount of bound styrene in modified BSK is preferably not more than 30 wt.% and, more preferably, not more than 20 wt.%, because it provides low heat.

Modified BSC BSC includes modified by emulsion polymerization (modified e-BSC and BSC-modified polymerization in solution (modified P-BSK), but modified P-BSK is preferred because by strengthening communication between the at the silicon dioxide and the polymer chain can reduce fuel consumption and tan δ.

As modified BSK preferably used rubbers associated with tin or silicon. As the method of binding of the modified BSC use way interaction of an alkali metal (such as Li) and alkaline earth metal (such as Mg) at the end of the chain of the modified BSC with tin halides and silicon halides.

Modified BSK is a (co)polymer obtained (co)polymerization of only one of the paired diolefin or paired diolefin with an aromatic vinyl compound, and preferably contains a primary amino group and alkoxysilyl group.

The primary amino group can be associated with either end group at the initiation of polymerization, the terminal group at the termination of polymerization, either with the main chain of the polymer and the side chain, but it is preferable to introducing it into the end group at the initiation of polymerization or into the end group at the termination of the polymerization, due to the fact that the energy losses of the end groups of the polymer decreases and the properties of the hysteresis loss improved.

The mass-average molecular weight (Mw) of the modified BSC is preferably at least one million and more preferably at least 1.2 million, because you can get the required SV is istwa fracture (cracking). Moreover, the Mw of the modified BSC is preferably not more than 2 million and, more preferably, not more than 1.8 million, because it is possible to adjust the viscosity of rubber and easily perform the process of kneading.

If the modified BSC is included as another rubber (b2) in the rubber component (B1), its content is at least 20 wt.% and preferably at least 25 wt.%, because the properties of prevulcanized and durability are predominant. Moreover, the content of the modified BSC in the rubber component (B1) is not more than 45 wt.% and, preferably, not more than 40 wt.%, because the composition of the mixture enter the appropriate number of NK and/or IR, excellent elongation at break.

As modified Bq can be preferable to use a modified BC, described in the case of rubber compounds (A) to the sides.

If the modified BC used as the diene rubber (b2), the content in the rubber component (B1) is preferably at least 20 wt.% and, more preferably, at least 25 wt.%, because this resistance to the development of cracks is excellent and tan δ can be reduced. Moreover, the content is preferably not more than 45 wt.% and, more prefer is Ino, not more than 40 wt.%, because the properties of prevulcanized and elongation at break are predominant.

Moreover, as EHC can preferably be used EHC described in rubber compounds (A) to the sides.

If EH is included in the composition of the mixture, its content in the rubber component (B1) is at least 20 wt.% and preferably at least 30 wt.%, because when the property prevalently is predominant. Moreover, its content is not more than 45 wt.% and, preferably, not more than 40 wt.%, because when the elongation at break is predominant.

Among these diene rubbers (b2) modified BSK is especially preferred because it provides good heat dissipation and elongation at break.

The total content of the diene rubber (b2) in the rubber component (B1) is preferably from 20 to 45 wt.%.

An example of the filler (B2) includes carbon black, silicon dioxide and calcium carbonate, and these substances can be used singly or at least two types can be used in combination. Among them, it is preferable to use silicon dioxide and/or carbon black, because when the elongation at break and tan δ can be reduced.

As silica and carbon black included in the rubber composition is a mixture to cover the cords of the carcass (In), you can use silicon dioxide and soot in the case of the rubber (A) to the sides.

The number part of the filler (B2) is at least 20 wt. parts per 100 wt. parts of the rubber component (B1) and, preferably, at least 23 wt. part, because when the elongation at break is superior. Moreover, the number included in the filler (B2) is not more than 40 wt. parts per 100 wt. parts of the rubber component (B1) and, preferably, not more than 35 wt. parts, because tan δ can be reduced.

In the rubber compound (C) to cover the casing fabric is preferable as the filler (B2) use a combination of silica and carbon black, because it achieves good heat dissipation and elongation at break. The mass ratio of silicon dioxide to soot is preferably from 10/1 to 1/1, even from 5/1 to 2/1, because you get a good elongation at break (durability).

If silicon dioxide is used as the filler (B2), preferably used in combination with silane bonding agent.

Silane bonding agent is not limited to a specific type, and can be used such agents, which are traditionally injected into the rubber compound with silica in the tyre industry. In particular,note the following sulfides, such as

bis(3-triethoxysilylpropyl)tetrasulfide,

bis(2-triethoxysilyl)tetrasulfide,

bis(4-triethoxysilylpropyl)tetrasulfide,

bis(3-triethoxysilylpropyl)tetrasulfide,

bis(2-trimethoxysilyl)tetrasulfide,

bis(4-trimethoxysilyl)tetrasulfide,

bis(3-triethoxysilylpropyl)trisulfide,

bis(2-triethoxysilyl)trisulfide,

bis(4-triethoxysilylpropyl)trisulfide

bis(3-triethoxysilylpropyl)trisulfide,

bis(2-trimethoxysilyl)trisulfide,

bis(4-trimethoxysilyl)trisulfide,

bis(3-triethoxysilylpropyl)disulfide,

bis(2-triethoxysilyl)disulfide,

bis(4-triethoxysilylpropyl)disulfide

bis(3-triethoxysilylpropyl)disulfide,

bis(2-trimethoxysilyl)disulfide,

bis(4-trimethoxysilyl)disulfide,

3-triethoxysilylpropyl-N,N-diethylthiocarbamoyl,

3-triethoxysilylpropyl-N,N-diethylthiocarbamoyl,

2-triethoxysilyl-N,N-diethylthiocarbamoyl

2-trimethoxysilyl-N,N-diethylthiocarbamoyl,

3-trimethoxypropylsilane,

3-triethoxycaprylylsilane, 3-triethoxysilylpropyl Methacrylonitrile and 3-trimethoxypropylsilane; mercaptans such as 3-mercaptopropionylglycine, 3-mercaptopropionate, 2-IU is optoelectromechanical and 2-mercaptoacetyltriglycine; vinyls, such as vinyltriethoxysilane and VINYLTRIMETHOXYSILANE; amines, such as 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-(2-amino-ethyl)aminopropyltriethoxysilane, 3-(2-amino-ethyl)aminopropyltriethoxysilane and 3-(2-amino-ethyl)aminopropyltrimethoxysilane; glycidate-compounds such as γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane and

γ-glycidoxypropyltrimethoxysilane; nitro compounds such as 3-nitropropionate and 3-nitropyridinium; chlorine compounds such as 3-chloropropionitrile,

3-chloropropionitrile, 2-chloroethylthioethyl and

2-chloroethylthiomethyl. Data silane bonding agents can be used singly or at least two types can be used in combination. Among them, preferably used bis(3-triethoxysilylpropyl)tetrasulfide and

bis(3-triethoxysilylpropyl)disulfide.

If the silane bonding agent is introduced into the mixture, the content of the silane coupling agent is preferably at least 6 wt. parts per 100 wt. parts of silica, and more preferably at least 8 wt. parts because it manufacturability and dissipation are predominant. Moreover, the content of the silane is of the first coupling agent is preferably not more than 12 wt. parts per 100 wt. parts of silicon dioxide and, more preferably, not more than 10 wt. parts due to the fact that when the silane bonding agent is injected in larger quantities, the excess bonding agent releases sulfur and rubber is excessively cured; therefore the elongation at break decreases, and increases the cost.

The rubber mixture (C) to cover the casing fabric of the present invention may respectively include additives commonly used in the tire industry, such as, for example, a vulcanizing agent such as sulfur, vulcanization accelerator, zinc oxide, antioxidant, aromatic oil and stearic acid, in addition to the rubber component (B1) and the filler (B2).

The complex elastic modulus E*measured at 70°C., is preferably at least 2.0 MPa, more preferably at least 2.5 MPa and even more preferably at least 2.7 MPa, because the rubber mixture (C) to cover the cords of the carcass according to the present invention has excellent elongation. Moreover, the complex elastic modulus E*measured at 70°C. is preferably not more than 3.5 MPa, more preferably not more than 3.2 MPa, because the rubber mixture for coating steel cords of the carcass (C) has excellent resistance to rolling.

Than lower tan δ, var is provided at 70°C, especially preferred compound (B) to cover the casing fabric of the present invention, but the lower limit is typically 0,03. Moreover, the loss tangent tan δ, measured at 70°C, preferably less than 0.12 and more preferably, not more than 0.11, since the rubber mixture (C) to cover the casing fabric has excellent resistance to rolling.

Cord frame in the present invention may be either a steel cord carcass, or fibrous cord of the carcass.

Steel cord carcass means a steel cord coated with rubber mixture (In) to cover the frame using a rubber mixture (C) to cover the cords of the carcass as rubber for coating steel cords of the carcass.

Further, the fibrous cord of the frame means fiber cord coated with rubber mixture (In) to cover the frame using a rubber mixture (C) to cover the cords of the carcass as rubber for coating steel cords of the carcass.

Here fibrous cord obtained from such raw materials as complex polyester, nylon, viscose fiber, polyethylene, and aramid. Among them as the source material preferably use complex polyester, due to the fact that he has an excellent thermal stability and, moreover, reduces the value.

(C) Rubber compound for OBGYN the part I

The rubber mixture (C) for crimping portion in the present invention includes a rubber component (C1)includes MK and/or IR (C1), modified Bq (C2) and another rubber (C3), and filler (C2).

The crimp part of the present invention means the entire part that comes in contact with the rim of the tire, and includes a filler bead, bead tape and toe of the tire bead.

NC and IC (C1) is not limited to a specific type and preferably you can use the TC and IR, described in the case of rubber compounds (A) to the sides.

The content of the TC and/or IR (C1) in the rubber component (C1) is at least 25 wt.% and preferably at least 30 wt.% and, more preferably, at least 32 wt.%, because when the elongation at break is superior. Moreover, the content is not more than 70 wt.% and, preferably, not more than 65 wt.%, more preferably not more than 50 wt.%, due to the fact that it is necessary to add a sufficient quantity of the modified Bq (C2), which have better characteristics durability at high temperature (from 150 to 250°C) and prevalently.

As modified Bq (C2) preferably use a modified BC, described in the case of the rubber (A) for the sides. As modified Bq (C2) is particularly preferred is a modified tin BC, in the later good heat dissipation.

The content of the modified Bq (C2) in the rubber component (C1) is preferably at least 15 wt.%, more preferably at least 35 wt.% and even more preferably at least 40 wt.%, because this resistance to the development of cracks is excellent and tan δ can be reduced. Moreover, the content is preferably not more than 80 wt.% and, more preferably, not more than 75 wt.%, and, even more preferably not more than 70 wt.%, because when the property prevalently and elongation at break are predominant.

Another rubber (C3) can be up to 55 wt.% the rubber component (C1), but as another rubber can be used butadiene, including syndiotactic crystals (VCR). When this VCR is preferred. As VCR preferably, you can use the VCR as described in the case of rubber compounds (A) to the sides.

If the VCR is introduced into the mixture as another rubber (C3), preferred is a content of not more than 55 wt.% and not more than 50 wt.%, due to the good heat dissipation in the rubber component (C1). Moreover, the number of at least 10 wt.% and at least 15 wt.% are preferred, because when the abrasive wear resistance and E* are good.

An example of a filler (C2) includes soot, diox the d silicon and calcium carbonate, and these substances can be used singly or at least two types can be used in combination. Among them, silicon dioxide and/or carbon black are preferred, because when the elongation at break and tan δ can be reduced.

As silicon dioxide, is included in the rubber compound (C) for crimping part, it is possible it is preferable to use silicon dioxide as described in the case of the rubber (A) for the sides. Silicon dioxide slows down the rate of vulcanization, and you can adjust the speed of vulcanization, using it in combination with a vulcanization accelerator, described later (for example, TACKIROL V200). When using silicon dioxide, in combination with it, you can optionally use a silane bonding agent. As the silane coupling agent can be used such agents described in the case of the rubber (B) to cover the cords of the carcass.

Further, the specific surface of the carbon black measured from the adsorption of nitrogen (N2UE), is preferably at least 45 m2/g, more preferably at least 50 m2/g, because when the abrasive wear resistance is excellent. Moreover, N2UE is preferably not more than 90 m2/g and, more preferably, not more than 85 m2/g, since it is possible to achieve the izkuyu heat dissipation. The preferred carbon black include, for example, N330 and N351.

The quantity in the mixture of filler (C2) is at least 35 wt. parts per 100 wt. parts of the rubber component (C1) and, preferably, at least 37 wt. parts as the abrasive wear resistance is excellent. Moreover, this amount is not more than 80 wt. parts per 100 wt. parts of the rubber component (C1) and, preferably, not more than 70 wt. parts, as tan δ can be reduced.

In the rubber compound (C) for crimping part as filler (C2) is preferably used silicon dioxide and carbon black in combination, because this heat and elongation at break are satisfactory. The mass ratio of silicon dioxide to the soot is from 0.10 to 0.30, and even from 0.15 to 0.27, because this heat, elongation and resistance to abrasive wear are good.

The rubber mixture (C) for crimping part of the present invention may respectively include additives, mainly used in the tire industry, such as, for example, a vulcanizing agent such as sulfur, hybrid crosslinking agent, a vulcanization accelerator, accelerating the vulcanization Supplement, zinc oxide, antioxidant, aromatic oil and stearic acid, in addition to rubber comp is the component (C1) and the filler (C2).

As accelerating the vulcanization additives you can use the product of the condensation of the modified resorcinol (or condensation products of modified cresol), and while providing the same complex elastic modulus E* a product of the condensation of the modified resorcinol is preferred due to the fact that Hs (=E*) can be increased without increasing the points of crosslinking using a crosslinking agent (sulfur) and elongation at break UR is excellent. Moreover, the product of condensation of the modified resorcinol is granular and has a reinforcing effect.

The product of the condensation of the modified resorcinol includes, for example, a compound represented by the following formula:

where n is an integer and preferably n is an integer from 1 to 3, R is a alkyl group containing from 1 to 3 carbon atoms. For example, TACKIROL V200, manufactured by Taoka Chemical Co., Ltd., the copolymer resorcinol-alkylphenol-formalin (SUMIKANOL 620, manufactured by Sumitomo Chemical Co., Ltd.) and condensation products of resorcinol-formaldehyde (Penacolite Resin B-18-S and b-20, manufactured by INDSPEC Chemical Corporation).

Especially preferably the condensation product modified resorcinol includes SUMIKANOL 620, and the condensation products of modified cresol includes SUMIKANOL 610.

The content of the product of the condensation of the modified resorcinol is at least 0.5. parts per 100 wt. parts of the rubber component (C1) and, preferably, at least 0.8 wt. parts, from the point of view of heat dissipation. Moreover, its content is not more than 5 wt. parts and preferably not more than 3 wt. parts, because when the kneading processability is good.

Hybrid crosslinking agent can be added to the mixture to suppress prevalently. Hybrid crosslinking agent includes, for example, HTS and PK900 manufactured by Flexsys Chemicals Sdn Bhd, and KA 9188, manufactured by Bayer AG.

The product of the condensation of the modified resorcinol and hybrid crosslinking agent can increase the complex elastic modulus E* and reduce the loss tangent tan δ without the formation of ineffective lateral cross-linked and branched structures of cross-linked structures and without relative reduction of the elongation at rupture (UR).

If the complex elastic modulus E* is too low in the crimp portion, the clamp portion excessively deformed due to compression deformation of the tyre when moving on the ground, and due to such deformation and heat dissipation delamination easily occurs between the crimp portion and the frame.

The complex elastic modulus E*measured at 70°C., is preferably at least 4.5 MPa and, more preferably, at least 4,8 MPa, because the rubber mixture for crimping part of this image is to be placed has excellent elongation. Moreover, the complex elastic modulus E*measured at 70°C, preferably is not more than 9,0 MPa and, more preferably, not more than 8.0 MPa, because the rolling resistance is excellent.

For rubber compound (C) for crimping part of the present invention, tan δ, measured at 70°C, preferably less than 0.12 and more preferably, not more than 0.11, the rolling resistance is low. The lower limit usually is 0.03.

The tire of the present invention is made in the usual way, using the rubber mixture (A) to the sides as the sides, the rubber mixture (C) to cover the casing fabric as cover for the casing fabric and rubber compound (C) for crimping part as crimping part. Namely, the rubber mixture (A) for the sides and the rubber mixture (C) for crimping part ekstragiruyut and adjust the shape of the sidewall and a crimping part on stage before vulcanization, fabric frame cover rubber mixture (C) to cover the cords of the carcass to form the frame and stack with other elements of the tire in the machine for molding tires; thus receive devulcanizing bus. The tire according to the present invention can be manufactured by heating under pressure devulcanizing tires placed in the vulcanizer.

Even if you set the UNC modulus E* of the sidewall is reduced, influence on the rolling resistance is small for tires with high internal pressure (from 700 to 1000 kPa (7 to 10 kgf/cm2)), but bending the sidewalls of the tire, that is, a complex elastic modulus E*, affects the rolling resistance of the tyres used at low internal pressure (not more than 300 kPa); thus, the tire according to the present invention can preferably be used as tires for passenger cars and tires for trucks light-duty trucks that use at low internal pressure (not more than 300 kPa).

EXAMPLES

The present invention is specifically described based on examples, but is not limited to these examples.

In the examples and comparative examples used the following chemical substances.

Natural rubber (NC): RSS#3

Modified tin butadiene rubber (modified tin Bq): N (modified tin Bq, lithium initiator:

lithium; the content of tin atoms: 250 ppm; Mw/Mn: 1.5 and the amount of vinyl linkages: from 10 to 13 wt.%), manufactured by ZEON Corporation.

Bq with a high content of CIS-links: BR150B (mass-average molecular weight: 5,0·105; distribution of molecular weight: 3,3; the type with a high content of CIS-links (the number of 1,4-CIS butadiene units: 97 wt.%), manufactured by Ube Industries Ltd.

Modified BSK: HPR 340 (modi is p butadiene-styrene rubber, obtained by polymerization in solution (modified P-BSC): the amount of bound styrene: 10 wt.%, binding was performed using alkoxysilane and was introduced in end groups), manufactured by Japan Synthetic Rubber Co., Ltd.

Butadiene-styrene rubber, obtained by emulsion polymerization (e-BSC), SBR1502, manufactured by Japan Synthetic Rubber Co., Ltd.

VCR: VCR412 manufactured by Ube Industries Ltd.

Carbon black 1: SHOWBLACK N550 (N2UE: 41 m2/g), manufactured SWOT JAPAN LTD.

Carbon black 2: SEAST V (N660, N2UE: 27 m2/g)manufactured by TOKAI CARBON CO. LTD.

Soot 3: SHOWBLACK N351H (N2UE: 73 m2/g), manufactured SWOT JAPAN LTD.

Silicon dioxide: Z115Gr (N2UE: 112 m2/g), manufactured by RHODIA S.A.

Silane bonding agent: Si75 (bis(3-triethoxysilylpropyl)disulfide), manufactured by Degussa Huls Co.

Zinc oxide: GINREI R, manufactured by Toho Zinc Co., Ltd.

Stearic acid: TSUBAKI, manufactured by NOF Corporation.

Aromatic oil: PROCESS X-140, manufactured by Japan Energy Co., Ltd

Antioxidant: NOCRAC 6C (N-(1,3-dimethylbutyl)-N-phenyl-p-phenylenediamine), manufactured by OUCHISHINKO CHEMICAL INDUSTRIAL CO., LTD.

Wax: SUNNOC WAX, manufactured by OUCHISHINKO CHEMICAL INDUSTRIAL CO., LTD.

Insoluble sulfur: SEIMISULFUR (insoluble sulfur in carbon disulfide: 60% and 10% oil), manufactured by NIPPON KANRYU INDUSTRY CO., LTD.

The vulcanization accelerator CBS: NOCCELER CZ-G, manufactured by TSURUMI CHEMICAL INDUSTRIAL CO., LTD.

The vulcanization accelerator HTM: NOCCELER H (hexamethylenetetramine), the issue is Amy OUCHISHINKO CHEMICAL INDUSTRIAL CO., LTD.

The vulcanization accelerator DPG: SOXINOL D, manufactured by Sumitomo Chemical Co., Ltd.

The vulcanization accelerator TBBS: NOCCELER NS (N-tert-butyl-2-benzothiazolylsulfenamide)manufactured by OUCHISHINKO CHEMICAL INDUSTRIAL Co., LTD.

Accelerating the vulcanization Supplement: SUMIKANOL 620 (copolymer of resorcinol-alkyl phenol-formaldehyde), manufactured by Sumitomo Chemical Co., Ltd.

Technological examples 1-5 obtain and comparative technological examples 1-6 (rubber compound for sidewall)

Chemical substances, except for sulfur and a vulcanization accelerator were added in accordance with the compositions of the mixtures are presented in Table 1 and kneaded at a maximum temperature of 165°C for 5 min, using a Bunbury mixer, obtaining beaten the workpiece. After this was added sulfur and a vulcanization accelerator to the resulting mix the workpiece, and the mixture was kneaded in a biaxial open the mixer at a maximum temperature of 97°C for 3 min with getting devulcanizing rubber mixture to the sides. Received devulcanizing rubber mixture was extrudible and gave the prescribed form for bus, and the vulcanized rubber sheets of examples 1-5 (SWJ 1-5 and comparative examples 1-6 (SWH 1-6) were obtained by performing the vulcanization in a press at 170°C for 12 minutes

The extrusion processability was evaluated for data vulcanized rubber sheet and performed tests on viscoelasticity and tension test. The results are presented in table 1.

The extrusion processability

State during extrusion in the extruder was evaluated as •: very good, about: satisfactory, Δ: poor (= necessary countermeasures) and x: unsuitable.

Test viscoelasticity

The complex modulus (E*) and loss tangent (tan δ) of the vulcanized rubber were measured under the following conditions: temperature 70°C, 10 Hz, initial strain of 10% and dynamic strain of 2%using a spectrometer VES for measuring viscoelastic properties, manufactured by Iwamoto Seisakusyo K.K. Measurement for rubber mixtures sidewall of the frame and the inner layer showed that the lower E*, the lower the rolling resistance. Measurements have shown that the smaller the tan δ is, the more reduced rolling resistance and reduced fuel consumption.

Tensile test

Samples of the vulcanized rubber of a certain size cut from the vulcanized rubber mixture and measured the elongation at rupture (UR) corresponding compositions in accordance with JIS K 6251 "Vulcanized rubber and thermoplastic rubber - method for determination of tensile properties". Furthermore, measurements have shown that more than UR, the more suppressed the propagation of cracks after application of the cut.

The technology is ski examples 6-10 and comparative technological examples 7-12 (rubber compound for covering the casing fabric)

Chemical substances, except for sulfur and a vulcanization accelerator were added in accordance with the compositions of the mixtures are presented in Table 2 and kneaded at a maximum temperature of 165°C for 5 min, using a Bunbury mixer to obtain a mix of the workpiece. After this was added sulfur and a vulcanization accelerator to the resulting mix the workpiece, and the mixture was kneaded in a biaxial open the mixer at a maximum temperature of 97°C for 3 min with getting devulcanizing rubber compound for covering the casing fabric. The carcass cord (cord of polyester fiber produced Tijin Limited) was coated received devulcanizing rubber mixture, and the vulcanized rubber sheets for covering the casing fabric for technological examples 6-10 (CAJ 1-5 and comparative technological examples 7-12 (SAN 1-6) were obtained by performing the vulcanization in a press at 170°C for 12 minutes

The processability was evaluated data for vulcanized rubber sheets for covering the casing fabric. The results are presented in Table 2.

Manufacturability sheets

The condition of the surface of the vulcanized rubber sheets to cover the cords of the carcass was evaluated as •: very good, about: satisfactory: unsatisfactory (= necessary countermeasures) and x: unsuitable.

Vulcanizer the bathrooms rubber sheets for tests made, by vulcanization under pressure at 170°C for 12 min, and tested on the viscoelasticity and the tensile test was performed in the same manner as in process example 1.

The results are presented in Table 2.

Technological examples 11-15 and comparative technological examples 13-18 (rubber compound for crimping part)

Chemical substances, except for sulfur and a vulcanization accelerator were added in accordance with the compositions of the mixtures are presented in Table 3, and were kneaded with a maximum temperature of 165°C for 5 min, using a Bunbury mixer with getting beaten workpiece. After this was added sulfur and a vulcanization accelerator to the resulting mix the workpiece, and the mixture was kneaded in a biaxial open the mixer at a maximum temperature of 97°C for 3 min with getting devulcanizing rubber compound for crimping part. Received devulcanizing rubber mixture is rolled in the form of sheets and vulcanized rubber sheets for technological examples 11-18 (CLJ 1-5 and comparative technological examples 13-18 (CLH 1-6) were obtained by performing the vulcanization in a press at 170°C for 12 minutes

On data from the vulcanized sheets were completed tests on viscoelasticity and tension test, as in those is technological in example 1. Moreover, also performed tests for maximum abrasive wear. The results are presented in Table 3.

Deviation rim

Devulcanizing rubber mixture is extruded in the form of a crimp part and the layers were applied with other elements of the tire molding machine to obtain devulcanizing tires, and they were vulcanizable under pressure at 170°C and 25 kgf/cm2within 15 min, to obtain tires for trucks (tire size: 225/70R16 117/115) for industrial production cars.

Tires were tested on a drum at a speed of 20 km/h under the conditions of 230% load of the maximum load (maximum internal pressure) by specification JIS for 600 h, and then measured the depth of abrasion of the contact portion of the bead of the rim, the rate of deflection of the rim of production example 11 was taken as 100, and expressed a measure of the deviation of the rim through the depth of abrasion, calculated using the formula presented below. It was found that the higher the rate of deflection of the rim, the harder deviation and this is preferred.

The rate of deflection of the rim = (Depth of abrasive wear process of example 11)/(Depth of abrasive wear of the respective mixtures)×100

Examples 1-10 and comparative examples 1-10

Rubber compound, etc is dostavlennya in Table 4, related to devulcanizing rubber mixtures for sidewall, received respectively in the technological examples 1-5 and comparative technological examples 1-6 were formed in the sidewall; a cord (a cord of closepreview fiber produced Tijin Limited) covered with rubber mixtures are presented in Table 4 related to devulcanizing rubber mixtures for coating steel cords of the carcass, respectively, obtained in the process examples 6-10 and comparative technological examples 7-12, to form a frame; devulcanizing rubber compound for crimping part, respectively, obtained in the process examples 10-15 and comparative technological examples 13-18, extruded in the form of a crimping part; they were laid with other member of the tire, in combination, are shown in Table 4; respectively, received devulcanization tires of examples 1-10 and comparative examples 1-10, and tires for testing (size: 195/65R15 GTO65, for a summer tire for passenger cars) were made by vulcanization under pressure at 170°C for 12 minutes

Rolling resistance and durability of the drum these tires for testing was determined by the following methods. The results for the examples presented in Table 4 and the results for comparative examples shown in Table 5.

With the resistance to rolling.

The rolling resistance of the tires for test conditions: rim size (15×6JJ), internal tire pressure (200 kPa), the load (to 4.41 kN) and speed (80 km/h), was measured using the device for measuring rolling resistance. Further indicator of rolling resistance of comparative example 1 taken as 100, and the rolling resistance of the respective mixtures were reflected in the indicators calculated by the formula below. It was found that the lower the figure the rolling resistance, the more reduced rolling resistance and characteristics of rolling resistance is better.

Index of rolling resistance = (rolling resistance of the respective mixes)/(rolling resistance of comparative example 1)×100

The indicator of the durability of the drum

Tires were tested on a drum at a speed of 20 km/h under the conditions of 230% load, which was the maximum load (maximum internal pressure) by specification JIS, and tested the durability of the sidewall. Measured distance (distance to the origin of bulges in the sidewall) to the formation of cracks at the boundary between the cord of the carcass and the sidewall in the rubber sidewall and the beginning of the separation, the distance of the tire of comparative example 1 taken as 100 and distance mileage corresponding mixtures, respectively, were expressed in the indicators, a measure of debt is knosti bus), calculating according to the formula below. Believed that the bulging sidewall occurred when the sidewall appeared circular and semi-circular swelling with a diameter of at least 5 cm, or on the sidewall formed of damage in the form of holes. Further, it was found that the higher the indicator of the durability of the drum, the better the durability of the sidewall. Basically, the more UR less tan δ, the harder it occurs stratification. Stratification does not extend to the inner layer, but tan δ affects the temperature of the sidewall. Frame, sides and clamp part are related to durability. Losses do not occur in the crimping part as such, but with the appropriate E* and a small tan δ, the rift between the cord of the carcass and the sidewall occurs harder.

(Indicator durability 36 and reel) = (the Distance of the respective mixes)/(Distance of comparative example 1)×100

From table 4 and 5 it is evident that the examples satisfy both the requirements of durability and rolling resistance, and achieved improvements.

In accordance with this invention a tire that meets the requirements of both low rolling resistance and superior strength, can be produced by a combination of sides, a frame and a crimping part comprising the definitely the rubber mixture.

1. Bus containing the sidewall, the frame and clamp the part where
the sidewall is made of a rubber mixture (A)containing a rubber component (A1)comprising (A1) from 35 to 65 wt.% natural rubber and/or isoprene rubber (A2) from 15 to 55 wt.% modified tin butadiene rubber or S-modified butadiene rubber and (A3) from 0 to 50 wt.% butadiene rubber, including syndiotactic crystals, epoxidizing natural rubber or a modified styrene-butadiene rubber; from 20 to 40 parts by weight of filler (A2)selected from the group consisting of carbon black, silica and calcium carbonate, or a combination of at least two of these substances on 100 parts by weight of rubber component (A1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 2.0 to 3.5 MPa and a loss tangent (tg δ is less than 0.12;
cord of the carcass is covered with a rubber mixture (C) to cover the casing fabric containing rubber component (B1)includes (b1) from 50 to 80 wt.% natural rubber and/or isoprene rubber (b2) from 20 to 45 wt.% at least one diene rubber selected from the group consisting of modified best choice of rubber associated with tin or silicon, modified the best choice of rubber containing the primary the second amino group or alkoxysilyl group, modified tin or S-modified butadiene rubber and epoxidizing natural rubber, and these modified best choice rubbers have the content of the bound styrene, from 5 to 30% wt.; from 20 to 40 parts by weight of filler (B2)selected from the group consisting of carbon black, silica and calcium carbonate, or a combination of at least two of these substances on 100 parts by weight of rubber component (B1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 2.0 to 3.5 MPa and a loss tangent (tg δ is less than 0.12 and (b3)from 0 to 30 wt.% other rubber and from 20 to 40 parts by weight of filler (B2) per 100 parts by weight of rubber component (B1), for which complex elastic modulus E*measured at 70°C., is from 2.0 to 3.5 MPa and a loss tangent (tg δ is less than 0.12 and
the crimp portion is made of a rubber compound (C)containing a rubber component (C1)includes (C1) from 30 to 50 wt.% natural rubber and/or isoprene rubber, (C2) from 15 to 70 wt.% modified tin butadiene rubber or S-modified butadiene rubber and (C3) from 0 to 55 wt.% butadiene rubber, including syndiotactic crystals; from 35 to 80 parts by weight of filler (C2)selected from the group consisting of carbon black, silicon dioxide and the carbonate is calcium, or a combination of at least two of these substances on 100 parts by weight of rubber component (C1), as well as vulcanizing agent, for which complex elastic modulus E*measured at 70°C., is from 4.5 to 9.0 MPa and a loss tangent (tg δ is less than 0.12.

2. The tire according to claim 1, in which the rubber mixture (A) sidewall contains natural rubber (A1), modified tin butadiene rubber (A2), and carbon black, specific surface, measured from the adsorption of nitrogen (N2UE) is less than 45 m2/g, as (A2).

3. The tire according to claim 1, in which the rubber mixture (C) coating the casing fabric contains natural rubber (b1), the modified rubber is the best choice as (b2) and carbon black with silica as (B2).

4. Tire according to any one of claims 1 to 3, in which the rubber mixture (C) crimp part contains natural rubber as (C1), a modified butadiene rubber (C2), butadiene rubber, including syndiotactic crystals, as (C3), and carbon black, specific surface, measured from the adsorption of nitrogen (N2Yn)is of at least 45 m2/g, and silicon dioxide, the specific surface, measured from the adsorption of nitrogen (N2UE), is at least 40 m2/g, as (C2).



 

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2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing completely para-substituted aromatic polyamide particles for use as filler, which comprises the following steps: a) adding an aramide polymer solution to a water-based coagulation liquid to obtain a hydrogen-containing moulded product and b) crushing the frozen non-dried or partially dried moulded product, having water content from 10 to 99 wt %.

EFFECT: method enables simple and efficient production of small aromatic polyamide particles which cannot be obtained through traditional grinding methods.

8 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of obtaining particles with a defined average diameter based on a thermoplastic polymer and powder. A molten mixture of thermoplastic material P with an additive A is prepared. The additive A contains a portion which is compatible with the thermoplastic material P and a portion which is incompatible with the thermoplastic material P and insoluble therein. The mixture is cooled and then treated with a compound B for layering. The compound B has a structure which is compatible with part of the structure of additive A. The weight ratio of components of the mixture is calculated using the formula: (weight of additive A + weight of compound B)/(weight of additive A + weight of compound B + weight of material P) and ranges from 0.01 to 0.6.

EFFECT: method enables to obtain particles with controlled geometry and given size.

34 cl, 3 tbl, 44 ex

FIELD: chemistry.

SUBSTANCE: disclosed is a single-component anhydrous coating composition based on silane-modified polymers, consisting of (wt %) a mixture of polyoxypropylene products with a terminal methoxy-alkyl-silane group with controlled viscosity (20-50), chalk powder (30-70), drying agents (0.5-5), curing agents (0.1-5), adhesion accelerator (0.2-5) and, if desired, pigments, plasticisers, filling materials, light stabilisers and heat stabilisers (total of 0-20). The invention also discloses a method of preparing the disclosed composition and use thereof in sealing building structures or flat roofs.

EFFECT: composition does not contain water and other solvents, is elastic and is capable of self-levelling; simultaneously hydraulic resistance sufficient for its use in sealing slanted or vertical surfaces.

8 cl, 1 tbl, 2 ex

Polymer composition // 2420544

FIELD: chemistry.

SUBSTANCE: invention discloses 2 versions of polymer compositions which contain a polymer and a copper hexadecabromo-phthalocyanine additive with the following content of components in pts. wt: polymer 85-95, said additive 15-5. In one of the versions of the composition, the polymer is a product of copolycondensation of terephthalic and para-toluic acid and hydrazine sulphate; in another version, the polymer is a product of copolycondensation of a mixture of terephthalic, isophthalic, para-toluic, meta-toluic acid and hydrazine sulphate.

EFFECT: high fire resistance of articles, ensuring processability when producing films, fibres and moulded articles.

2 cl, 1 tbl, 18 ex

FIELD: chemistry.

SUBSTANCE: composition contains a mixture of polyamide, where the ratio of terminal amino groups in the terminal carboxyl groups of the polyamide polymer is less than 0.2, polyester which is capable of crystallising and an interfacial tension reducing agent.

EFFECT: composition enables to obtain dispersed particles with average size of less than 200 nm when stretched, good colour composition which will not exhibit high increase in turbidity with increase in the amount of dispersed material, or has acceptable turbidity during production, and has good colour, especially in the absence of cobalt.

7 cl, 3 tbl, 18 ex, 8 dwg

FIELD: chemistry.

SUBSTANCE: composition contains a mixture of polyamide, where the ratio of terminal amino groups in the terminal carboxyl groups of the polyamide polymer is less than 0.2, polyester which is capable of crystallising and an interfacial tension reducing agent.

EFFECT: composition enables to obtain dispersed particles with average size of less than 200 nm when stretched, good colour composition which will not exhibit high increase in turbidity with increase in the amount of dispersed material, or has acceptable turbidity during production, and has good colour, especially in the absence of cobalt.

7 cl, 3 tbl, 18 ex, 8 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing frictional polymer materials and can be used in making brake shoes of railway wagons and locomotives, for motor transport, cranes, clutch plates and other articles. The method is realised by processing butadiene or butadiene-nitrile rubber on plastification equipment and mixing the rubber with curing agents, with fibre and powdered filling materials. Aromatic polyamine is simultaneously added with curing additives. The aromatic polyamine is an aniline-formaldehyde condensate consisting of 75% isomers of diaminodiphenylmethane and 3-4 benzene-nuclear primary amines bound by methylene bridges. The fibre filler is pre-saturated for 15 minutes with aqueous solution of epoxy resin which is a product of reacting a mixture of diane and aliphatic epoxy resins with glycols or derivatives thereof, in ratio A:B between 95:5 and 60:40, and then dried to moisture not higher than 1%. The composition of the material contains the following in pts. wt: rubber 100, aromatic polyamine 2-20, sulphur 1-15, thiuram 0.04-2.0, 2-mercaptobenzothiazole 0.3-4.0, fibre filler 15-100, powdered filler 10-100.

EFFECT: invention improves strength characteristics of frictional polymer materials and increases labour safety.

2 tbl, 7 ex

Pigment composition // 2418829

FIELD: chemistry.

SUBSTANCE: pigment composition contains at least 35 wt % one pigment and at most 65 wt % polymer-dispersant per total weight of the pigment and the polymer-dispersant. Said polymer-dispersant contains a polymer backbone chain obtained via chain-transfer polymerisation, having hydrophilic polyalkylene oxide side groups. The pigment contained in the composition is selected from a wide range of pigments and has average particle size between 50 nm and 5000 nm. Described also is a method of preparing said pigment composition, a coating composition based on said composition and use in preparing a mixed pigment composition.

EFFECT: composition ensures easy mixture with aqueous and organic media.

11 cl, 1 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to marble chips, method of making said chips and artificial marble made from said chips. The marble chips are made from hardening a polymer composition which contains an acrylic monomer which forms cross bonds, and binding substance selected from a group consisting of halogenated urethane acrylate, halogenated epoxy acrylate and a mixture of said compounds. The method of obtaining the marble chips involves preparation of a polymer composition by adding an acrylic monomer, which forms cross bonds, to the binding substance, hardening the polymer composition and crushing the hardened article.

EFFECT: artificial marble containing marble chips disclosed by the invention may have appearance and texture similar to that of synthetic stone, as well as good thermal processability and mouldability, which are advantages of acrylic artificial marble.

21 cl, 1 tbl, 4 dwg, 10 ex

FIELD: machine building.

SUBSTANCE: invention refers to rubber industry, particularly to development of powder fillers for thermo-plastic elastomer materials on base of rubber and can be implemented at fabrication of various extrusive profiles and moulded flexible parts made of rubber mixtures for automobile, cable, light and building industries. For elastomer materials on base of rubber, particularly, poly-chloroprene, sulpho-chlorinated polyethylene powder filler contains natural mineral schungite and as modifier - methane-amine and/or teotropine. Also, size of powder particles of filler with modifier is chosen from 100 nm to 20 mcm, and external specific surface of filler with modifier is from 20 to 40 m2/g. Methane-amine and/or teotropine are introduced by dissolution or after their intermixing with schungite, for example, in a ball mill or in impact mill.

EFFECT: increased strength of elastomer materials on base of rubber at stretching, maintaining percent elongation of elastomer materials on base of rubber and maintaining process characteristics during treatment of materials.

6 cl, 1 tbl

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