US3881536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber vulcanizates
Assignee: PPG Industries Inc
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Filing: 1974-05-13
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Granted: 1975-05-06
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Expires: 1994-05-13
Abstract
Abstract Improved siliceous pigment reinforced rubber vulcanizates are provided by incorporating into the vulcanizable rubber composition a coupling amount of silanated rubber coupling agent that is the catalytic reaction product of an organohydrosilane, such as triethoxysilane, and unsaturated synthetic rubber polymer having pendant vinyl groups, such as polybutadiene rubber and styrene-butadiene rubber.
Inventors
- 👤 Jr Thomas J Doran
- 👤 Roland H Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; C08C; C08C19/00; C08C19/25; C08K; C08K3/00; C08K3/34; C08K3/36; C08K5/00; C08K5/54; C08K5/5406; C08L; C08L15/00; C08L21/00; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
124 words
IN THE PROCESS OF COMPOUNDING A SILICEOUS PIGMENT REINFORCED SULFUR CURABLE RUBBER TO PROVIDE A VULCANIZABLE COMPOSITION SUITABLE FOR USE IN THE MANUFACTURE OF TIRES, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE COMPOSITION A SILANATED RUBBER COUPLING AGENT CONSISTING ESSENTIALLY OF THE CATALYTIC REACTION ADDITION PRODUCT OF (1) ORGANOHYDROSILANE HAVING THE DUAL FUNCTIONALITY, A AND B, WHEREIN A IS A FUNCTIONAL GROUP CAPABLE OF FORMING A BOND WITH A SILICEOUS PIGMENT PARTICLE AND B IS A HYDROXILYL GROUP AND (2) SYNTHETIC UNSATURATED RUBBER POLYMER HAVING AT LEAST 1 PERCENT BY WEIGHT OF ITS OLEFINIC UNSATURATION PRESENT, AS PENDANT VINYL GROUPS, SAID COUPLING AGENT FURNISHING FROM ABOUT 0.1 TO ABOUT 3 PARTS OF ORGANOHYDROSILANE EQUIVALENT PER 100 PARTS OF TOTAL RUBBER IN THE VULCANIZABLE COMPOSITION.
Claim 2
Dependent Claim
124 words
IN THE PROCESS OF COMPOUNDING A SILICEOUS PIGMENT REINFORCED SULFUR CURABLE RUBBER TO PROVIDE A VULCANIZABLE COMPOSITION SUITABLE FOR USE IN THE MANUFACTURE OF TIRES, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE COMPOSITION A SILANATED RUBBER COUPLING AGENT CONSISTING ESSENTIALLY OF THE CATALYTIC REACTION ADDITION PRODUCT OF (1) ORGANOHYDROSILANE HAVING THE DUAL FUNCTIONALITY, A AND B, WHEREIN A IS A FUNCTIONAL GROUP CAPABLE OF FORMING A BOND WITH A SILICEOUS PIGMENT PARTICLE AND B IS A HYDROXILYL GROUP AND (2) SYNTHETIC UNSATURATED RUBBER POLYMER HAVING AT LEAST 1 PERCENT BY WEIGHT OF ITS OLEFINIC UNSATURATION PRESENT, AS PENDANT VINYL GROUPS, SAID COUPLING AGENT FURNISHING FROM ABOUT 0.1 TO ABOUT 3 PARTS OF ORGANOHYDROSILANE EQUIVALENT PER 100 PARTS OF TOTAL RUBBER IN THE VULCANIZABLE COMPOSITION.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the synthetic unsaturated rubber polymer having pendant vinyl groups is styrene-butadiene rubber, butadiene rubber, ethylene-propylene-diene rubber or mixtures of such rubber.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein the sulfur curable rubber is styrene-butadiene rubber, natural rubber, butadiene rubber, ethylene-propylene-diene rubber, synthetic 1,4-polyisoprene rubber, butadiene-acrylonitrile rubber or polychloroprene rubber.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the organohydrosilane is represented by the general formula:
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein the organohydrosilane is trimethoxysilane or triethoxysilane.
Claim 7
Dependent Claim
25 words
The process of claim 1 wherein the synthetic unsaturated rubber polymer has from 1 to 50 percent of its olefinic unsaturation as pendant vinyl groups.
Claim 8
Dependent Claim
25 words
The process of claim 5 wherein the synthetic unsaturated rubber polymer has from 5 to 30 percent of its olefinic unsaturation as pendant vinyl groups.
Claim 9
Dependent Claim
121 words
A vulcanizate of a vulcanizable rubber composition comprising (a) sulfur curable rubber, (b) from 10 to 90 parts of siliceous pigment per 100 parts of sulfur curable rubber, and (c) silanated rubber coupling agent consisting essentially of the catalytic reaction addition product of (1) organohydrosilane having the dual functionality, A and B, wherein A is a functional group capable of forming a bond with a siliceous pigment particle and B is a hydrosilyl group and (2) synthetic unsaturated rubber polymer having from 5 to 50 percent by weight of its olefinic unsaturation present as pendant vinyl groups, said coupling agent furnishing from about 0.1 to about 3 parts of organohydrosilane equivalent per 100 parts of total rubber in the vulcanizable composition.
Claim 10
Dependent Claim
121 words
A vulcanizate of a vulcanizable rubber composition comprising (a) sulfur curable rubber, (b) from 10 to 90 parts of siliceous pigment per 100 parts of sulfur curable rubber, and (c) silanated rubber coupling agent consisting essentially of the catalytic reaction addition product of (1) organohydrosilane having the dual functionality, A and B, wherein A is a functional group capable of forming a bond with a siliceous pigment particle and B is a hydrosilyl group and (2) synthetic unsaturated rubber polymer having from 5 to 50 percent by weight of its olefinic unsaturation present as pendant vinyl groups, said coupling agent furnishing from about 0.1 to about 3 parts of organohydrosilane equivalent per 100 parts of total rubber in the vulcanizable composition.
Claim 11
Dependent Claim
27 words
The vulcanizate of claim 8 wherein the synthetic unsaturated rubber polymer having pendant vinyl groups is styrene-butadiene rubber, butadiene rubber, ethylene-propylene-diene rubber or mixtures of such rubber.
Claim 12
Dependent Claim
28 words
The vulcanizate of claim 8 wherein the sulfur curable rubber is styrene-butadiene rubber, natural rubber, butadiene rubber, an ethylene-propylene-diene rubber, synthetic 1,4-polyisoprene rubber, butadiene-acrylonitrile rubber or polychloroprene rubber.
Claim 13
Dependent Claim
14 words
The vulcanizate of claim 8 wherein the organohydrosilane is represented by the general formula:
Claim 14
Dependent Claim
23 words
The vulcanizate of claim 11 wherein n is 3 and X is an alkoxy group containing from 1 to 5 carbon atoms inclusive.
Claim 15
Dependent Claim
22 words
The vulcanizate of claim 12 wherein the synthetic unsaturated rubber polymer is styrene-butadiene rubber and the sulfur curable rubber is natural rubber.
Claim 16
Dependent Claim
26 words
The vulcanizate of claim 11 wherein the synthetic unsaturated rubber polymer has from 5 to 30 percent of its olefinic unsaturation present as pendant vinyl groups.
Claim 17
Dependent Claim
52 words
A rubber tire having as a tread component thereof a vulcanizate of a vulcanizable rubber composition comprising (a) sulfur curable rubber, (b) from 30 to 75 parts of siliceous pigment, and (c) silanated rubber coupling agent consisting essentially of the catalytic reaction addition product of (1) organohydrosilane represented by the general formulA:
Claim 18
Dependent Claim
52 words
A rubber tire having as a tread component thereof a vulcanizate of a vulcanizable rubber composition comprising (a) sulfur curable rubber, (b) from 30 to 75 parts of siliceous pigment, and (c) silanated rubber coupling agent consisting essentially of the catalytic reaction addition product of (1) organohydrosilane represented by the general formulA:
Claim 19
Dependent Claim
27 words
The tire of claim 15 wherein the synthetic unsaturated rubber polymer having pendant vinyl groups is styrene-butadiene rubber, butadiene rubber, ethylene-propylene-diene rubber or mixtures of such rubbers.
Claim 20
Dependent Claim
27 words
The tire of claim 16 wherein the sulfur curable rubber is styrene-butadiene rubber, natural rubber, butadiene rubber, ethylene-propylene-diene rubber, synthetic 1,4-polyisoprene rubber, butadiene-acrylonitrile rubber or polychloroprene rubber.
Claim 21
Dependent Claim
89 words
A rubber additive comprising siliceous pigment and from 1 to 50 percent by weight of silanated rubber consisting essentially of the catalytic reaction addition product of (1) 0.2 to 50 parts of organohydrosilane having the dual functionality, A and B, wherein A is a functional group capable of forming a bond with a siliceous pigment particle and B is a hydrosilyl group and (2) 100 parts of synthetic unsaturated rubber polymer having from 1 to 60 percent by weight of its total olefinic unsaturation present as pendant vinyl groups.
Claim 22
Dependent Claim
89 words
A rubber additive comprising siliceous pigment and from 1 to 50 percent by weight of silanated rubber consisting essentially of the catalytic reaction addition product of (1) 0.2 to 50 parts of organohydrosilane having the dual functionality, A and B, wherein A is a functional group capable of forming a bond with a siliceous pigment particle and B is a hydrosilyl group and (2) 100 parts of synthetic unsaturated rubber polymer having from 1 to 60 percent by weight of its total olefinic unsaturation present as pendant vinyl groups.
Claim 23
Dependent Claim
15 words
The rubber additive of claim 18 wherein the organohydrosilane is represented by the general formula:
Claim 24
Dependent Claim
46 words
The rubber additive of claim 18 wherein the synthetic unsaturated rubber polymer pendant vinyl groups is styrene-butadiene rubber, butadiene rubber, ethylene-propylene-diene rubber or mixtures of such rubber and said polymer has from 5 to 30 weight percent of its olefinic unsaturation present as pendant vinyl groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |