US6017985A
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Hydrosilated crystalline high trans polybutadine with silica filler, tires having a base of said composition and method of preparing same
Assignee: Bridgestone Corp
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Filing: 1997-04-21
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Granted: 2000-01-25
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Expires: 2017-04-21
Abstract
Abstract Novel silicon-containing derivatives of crystalline, high-trans-1,4 polybutadiene in which organosilicon-containing groups are bonded to the 1,2-vinyl carbon atoms along the main chain of the butadiene polymers through the carbon-silicon linkages. These derivatives of butadiene polymers are produced by the addition reaction of an organosilicon-compound having one hydrogen atom directly bonded to the silicon atom in the molecule to the double bonds in the 1,2-vinyl group butadiene polymers. These derivatives having good compatibility with siliceous fillers and when blended with filled diene rubbers are cured to elastomer compositions having excellent properties suitable for the production of tires.
Inventors
- 👤 Jung W. Kang
- 👤 Jason T. Poulton
- 👤 Takashi Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:54
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/25; C08L; C08L21/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
132 words
A tire, characterized in that a rubber composition comprising: (a) as a rubber ingredient, a blend of 70 to 99 parts by weight of a diene rubber and 30 to 1.0 parts by weight of a crystalline polybutadiene having a trans-1,4 content ranging between about 75% to 96% and having a 1,2-vinyl content ranging between about 5 to 20%, modified with a silane compound by reacting at least 1.0% of 1,2-vinyl groups with the silane compound represented by the formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are each the same or different non-hydrolyzable monovalent hydrocarbon groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3; and (b) 5 to 200 parts by weight of silica, based on 100 parts by weight of the rubber ingredient.
Claim 2
Dependent Claim
132 words
A tire, characterized in that a rubber composition comprising: (a) as a rubber ingredient, a blend of 70 to 99 parts by weight of a diene rubber and 30 to 1.0 parts by weight of a crystalline polybutadiene having a trans-1,4 content ranging between about 75% to 96% and having a 1,2-vinyl content ranging between about 5 to 20%, modified with a silane compound by reacting at least 1.0% of 1,2-vinyl groups with the silane compound represented by the formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are each the same or different non-hydrolyzable monovalent hydrocarbon groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3; and (b) 5 to 200 parts by weight of silica, based on 100 parts by weight of the rubber ingredient.
Claim 3
Dependent Claim
21 words
The tire as defined in claim 1 wherein the crystalline polybutadiene has a trans-1,4 content ranging between about 85% to 95%.
Claim 4
Dependent Claim
59 words
The tire as defined in claim 1 wherein R and R' are independently selected from the group consisting of one or more substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups.
Claim 5
Dependent Claim
84 words
A rubber tire tread comprising: (a) as a rubber ingredient, a crystalline polybutadiene having a trans-1,4 content ranging between about 75% to about 96% and having a 1,2-vinyl content ranging between about 5 to 20% having at least 1.0% of 1,2-vinyl groups bonded, through carbon-to-silicon linkages, silicon-containing groups having the general formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are each the same or different non-hydrolyzable monovalent hydrocarbon groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
Claim 6
Dependent Claim
84 words
A rubber tire tread comprising: (a) as a rubber ingredient, a crystalline polybutadiene having a trans-1,4 content ranging between about 75% to about 96% and having a 1,2-vinyl content ranging between about 5 to 20% having at least 1.0% of 1,2-vinyl groups bonded, through carbon-to-silicon linkages, silicon-containing groups having the general formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are each the same or different non-hydrolyzable monovalent hydrocarbon groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
Claim 7
Dependent Claim
58 words
The rubber tire tread as defined in claim 4 wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups.
Claim 8
Dependent Claim
23 words
The rubber tire tread as defined in claim 4 wherein the crystalline polybutadiene has a trans-1,4 content ranging between about 85% to 95%.
Claim 9
Dependent Claim
22 words
The rubber tire tread as defined in claim 4 wherein R and R' are alkyl groups having one to six carbon atoms.
Claim 10
Dependent Claim
108 words
A crystalline polybutadiene polymer having a trans-1,4 content of at least 75% and having a 1,2-vinyl content of at least 5%, and having at least 1% of 1,2-vinyl groups reacted to form monomer contributed units represented by one or more of the following units: ##STR4## wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups; X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
Claim 11
Dependent Claim
108 words
A crystalline polybutadiene polymer having a trans-1,4 content of at least 75% and having a 1,2-vinyl content of at least 5%, and having at least 1% of 1,2-vinyl groups reacted to form monomer contributed units represented by one or more of the following units: ##STR4## wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups; X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
Claim 12
Dependent Claim
58 words
The crystalline polybutadiene polymer as defined in claim 8 wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups.
Claim 13
Dependent Claim
19 words
The polymer as defined in claim 8 wherein the polymer has a trans-1,4 content ranging between 85% to 95%.
Claim 14
Dependent Claim
21 words
The polymer as defined in claim 8 wherein R' is an alkyl group having one to six carbon atoms and n=3.
Claim 15
Dependent Claim
118 words
A process of preparing a silicon containing crystalline polybutadiene having a trans-1,4 content ranging between about 75% to 96% and having a 1,2-vinyl content ranging between about 5 to 20%, modified with a silane compound by reacting at least 1.0% of 1,2-vinyl groups with the silane compound represented by the formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
Claim 16
Dependent Claim
118 words
A process of preparing a silicon containing crystalline polybutadiene having a trans-1,4 content ranging between about 75% to 96% and having a 1,2-vinyl content ranging between about 5 to 20%, modified with a silane compound by reacting at least 1.0% of 1,2-vinyl groups with the silane compound represented by the formula: R.sub.m (R'O).sub.n X.sub.3-m-n SiH wherein R and R' are independently selected from the group consisting of substituted and unsubstituted C 1 -C 20 alkyl groups, C 3 -C 20 cycloalkyl groups, and C 6 -C 20 aryl groups, and wherein the substituted groups are substituted with substituents that are non-reactive with vinyl groups, X=Cl, Br or I; m=0, 1 or 2; n=1, 2 or 3; and (n+m)≦3.
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