US4111867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition for tire treads
Assignee: Zeon Corp
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Filing: 1977-03-29
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Granted: 1978-09-05
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Expires: 1997-03-29
Abstract
Abstract A rubber composition for tire treads includes (Ia) an oil-extended rubber having a Mooney viscosity (ML 1+4 , 100° C) of 20 to 70 which is prepared by adding 20 to 80 parts of a hydrocarbon oil to 100 parts by weight of a rubber terpolymer which is composed of 2 to 13% by weight of combined styrene, 15 to 70% by weight of combined 1,3-butadiene and 17 to 83% by weight of combined 1,3-pentadiene with the dienes having a total 1,4-bond content of at least 65 mole%, (II) vulcanization additives, and (III) 30 to 110 parts by weight, per 100 parts by weight of the oil-extended rubber (Ia), of a carbon black for rubber having an average particle diameter of not more than 60 mμ the rubbery copolymer has a glass transistion temperature of -70° to -20° C., and is produced by emulsion-polymerization at 0° to 30° C.
Inventors
- 👤 Keiji Komuro
- 👤 Tetsu Ohishi
- 👤 Tetsuo Waku
- 👤 Nagatoshi Sugi
- 👤 Souichi Suzuki
- 👤 Akio Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
B; B60; B60C; B60C1/00; B60C1/0016; C; C08; C08L; C08L9/00; C08L9/06; C08L7/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
149 words
A rubber composition for tire treads, said composition consisting essentially of (Ia) an oil-extended rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 20 to 70 and prepared by adding 20 to 80 parts of a hydrocarbon oil to 100 parts by weight of a rubbery terpolymer which is composed of 2 to 13% by weight of combined styrene, 15 to 70% by weight combined of 1,3-butadiene and 17 to 83% by weight of combined 1,3-pentadiene with the dienes having a total 1,4-bond content of at least 65 mole%, has a glass transition temperature of -70° to -20° C., and is produced by emulsion-polymerization at 0° to 30° C., (ii) vulcanization additives, and (III) 30 to 110 parts by weight, per 100 parts by weight of the oil-extended rubber (Ia), of a carbon black for rubber having an average particle diameter of not more than 60 mμ.
Claim 2
Dependent Claim
149 words
A rubber composition for tire treads, said composition consisting essentially of (Ia) an oil-extended rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 20 to 70 and prepared by adding 20 to 80 parts of a hydrocarbon oil to 100 parts by weight of a rubbery terpolymer which is composed of 2 to 13% by weight of combined styrene, 15 to 70% by weight combined of 1,3-butadiene and 17 to 83% by weight of combined 1,3-pentadiene with the dienes having a total 1,4-bond content of at least 65 mole%, has a glass transition temperature of -70° to -20° C., and is produced by emulsion-polymerization at 0° to 30° C., (ii) vulcanization additives, and (III) 30 to 110 parts by weight, per 100 parts by weight of the oil-extended rubber (Ia), of a carbon black for rubber having an average particle diameter of not more than 60 mμ.
Claim 3
Dependent Claim
181 words
A rubber composition for tire treads, said composition consisting essentially of (I) a mixture consisting of at least 20% by weight of (Ia) an oil-extended rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 20 to 70 and (Ib) another hydrocarbon rubber in an amount of at most 80% by weight, said hydrocarbon rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 10 to 100, said oil-extended rubber being prepared by adding 20 to 80 parts by weight of a hydrocarbon oil to 100 parts by weight of combined styrene, 15 to 70% by weight of combined 1,3-butadiene and 17 to 83% by weight of combined 1,3-pentadiene with the dienes having a total 1,4-bond content of at least 65 mole%, has a glass transition temperature of -70° to -20° C., and is produced by emulsion-polymerization at 0° to 30° C., (ii) vulcanization additives, and (III) 30 to 110 parts by weight, per 100 parts by weight of the mixture (I), of a carbon black for rubber having an average particle diameter of not more than 60 mμ.
Claim 4
Dependent Claim
181 words
A rubber composition for tire treads, said composition consisting essentially of (I) a mixture consisting of at least 20% by weight of (Ia) an oil-extended rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 20 to 70 and (Ib) another hydrocarbon rubber in an amount of at most 80% by weight, said hydrocarbon rubber having a Mooney viscosity (ML 1+4 , 100° C.) of 10 to 100, said oil-extended rubber being prepared by adding 20 to 80 parts by weight of a hydrocarbon oil to 100 parts by weight of combined styrene, 15 to 70% by weight of combined 1,3-butadiene and 17 to 83% by weight of combined 1,3-pentadiene with the dienes having a total 1,4-bond content of at least 65 mole%, has a glass transition temperature of -70° to -20° C., and is produced by emulsion-polymerization at 0° to 30° C., (ii) vulcanization additives, and (III) 30 to 110 parts by weight, per 100 parts by weight of the mixture (I), of a carbon black for rubber having an average particle diameter of not more than 60 mμ.
Claim 5
Dependent Claim
36 words
The composition of claim 1 wherein the rubbery terpolymer consists of 4 to 11% by weight of combined styrene, 25 to 60% by weight of combined 1,3-butadiene and 29 to 71% by weight of combined 1,3-pentadiene.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein the hydrocarbon oil is an aromatic, aliphatic or naphthenic hydrocarbon oil.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the carbon black (III) is a member selected from the group consisting of SAF, ISAF, HAF, FEF and EPC.
Claim 8
Dependent Claim
37 words
The composition of claim 2 wherein the other hydrocarbon rubber (Ib) is a rubber selected from the group consisting of polybutadiene rubber, styrene/butadiene copolymer rubber, synthetic polyisoprene rubber, natural rubber and trans-polypentenamer, or an oil-extended product thereof.
Claim 9
Dependent Claim
36 words
The composition of claim 2 wherein the rubbery terpolymer consists of 4 to 11% by weight of combined styrene, 25 to 60% by weight of combined 1,3-butadiene and 29 to 71% by weight of combined 1,3-pentadiene.
Claim 10
Dependent Claim
17 words
The composition of claim 2 wherein the hydrocarbon oil is an aromatic, aliphatic or naphthenic hydrocarbon oil.
Claim 11
Dependent Claim
25 words
The composition of claim 2 wherein the carbon black (III) is a member selected from the group consisting of SAF, ISAF, HAF, FEF and EPC.
Claim 12
Dependent Claim
33 words
The composition of claim 2 wherein the rubber mixture (I) consists of 40 to 95% by weight of the oil-extended rubber (Ia) and 5 to 60% by weight of the hydrocarbon rubber (Ib).
References Cited (Backward Citations)
US2384545A
Cited
US3401213A
Cited
US3496154A
Cited
US3498960A
Cited
US3795651A
Cited
US3795652A
Cited
US3868344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |