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US 9,752,020 B2Granted
Rubber composition having good wet-traction properties and a low aromatic-oil content
AssigneeBridgestone Corporation
InventorsXiaorong Wang, James E. Hall
Life of this patent
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Abstract
This invention relates to rubber compositions having a low aromatic-oil content, or no aromatic oils at all. The rubber composition contains a diene rubber, one or more fillers, and a low molecular weight, functionalized polymer than has the ability to interact with the fillers and act and as a replacement to the aromatic oil. The rubber compositions so produced may be used in tread rubbers and have exhibited good snow/wet traction properties and low rolling resistance.
Claims20
A tread rubber composition, comprising:
- a. 100 phr of a rubber polymer or copolymer;
- b. silica;
- c. 10 to 30 phr of a functionalized polyisobutylene having a molecular weight of about 1,000 to about 50,000;
- and
- d. 0 to 30 phr of an aromatic oil;
- wherein said functionalized polyisobutylene is a reaction product of an anhydride-functionalized polyisobutylene and an amine having the formula H2N—(CH2)x-A, wherein x is an integer ranging from 1 to 18 and A is an amino group;
- wherein the functionalized polyisobutylene contains functional groups at multiple points along the polymer backbone and is a liquid at 23° C.
4 more elements
A method of producing a tire having improved wet-traction properties, comprising:
- a. preparing a tread rubber composition comprising mixing:
- i. 100 phr of a rubber polymer or copolymer;
- ii. silica;
- iii. 10 to 30 phr of a functionalized polyisobutylene having a molecular weight of about 1,000 to about 50,000;
- and
- iv. 0 to 30 phr of an aromatic oil;
- b. vulcanizing the tread rubber composition to produce a tire having improved wet-traction properties;
- wherein said functionalized polyisobutylene is a reaction product of an anhydride-functionalized polyisobutylene and an amine having the formula H2N—(CH2)x-A, wherein x is an integer ranging from 1 to 18 and A is an amino group;
- wherein the functionalized polyisobutylene contains functional groups at multiple points along the polymer backbone and is a liquid at 23° C.
6 more elements
Dependencies are inferred from the claim text.