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US 6,552,108 B1Granted
Rubber blends having improved stability and green strength
AssigneeExxonMobil Chemical Patents Inc.
InventorsHsien Chang Wang, Ilan Duvdevani, Connie R. Qian, Pawan Kumar Agarwal
Life of this patent
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Abstract
The present invention relates generally to rubber compositions having improved green strength and thermal stability. These compositions comprise blends of a first rubber component, an isoolefin/para-alkylstyrene copolymer component, and an amine component reacted in situ prior to curing. The present invention further relates to methods for preparing these compositions.
Claims36
A blend composition comprising:
- from about 5% to about 95% by weight of a rubber component;
- an amine compound represented by the formula (R1R2R3)N, wherein R1 is either hydrogen or a C4 to C30 hydrocarbyl group, R2 is either hydrogen or a C1 to C30 hydrocarbyl group;
- and R3 is either hydrogen or a C1 to C30 hydrocarbyl group, provided that at least one of R1, R2 and R3 is not hydrogen;
- and
- from about 95% to about 5% by weight of a component A, wherein said component A consists essentially of an isoolefin/para-alkylstyrene copolymer, said isoolefin having between 4 and 7 carbon atoms and said copolymer containing from about 0.5% to about 20% by weight para-alkylstyrene, and wherein from about 0.01 mole % to about 60 mole % of the alkyl groups present on the benzene ring of the para-alkylstyrene contain a halogen atom.
2 more elements
A method of forming a blended composition comprising combining:
- from about 5% to about 95% by weight of a rubber component;
- an amine compound represented by the formula (R1R2R3)N, wherein R1 is either hydrogen or a C4 to C30 hydrocarbyl group, R2 is either hydrogen or a C1 to C30 hydrocarbyl group;
- and R3 is either hydrogen or a C1 to C30 hydrocarbyl group, provided that at least one of R1, R2 and R3 is not hydrogen;
- and
- from about 95% to about 5% by weight of a component A, wherein said component A consists essentially of an isoolefin/para-alkylstyrene copolymer, said isoolefin having between 4 and 7 carbon atoms and said copolymer containing from about 0.5% to about 20% by weight para-alkylstyrene, and wherein from about 0.01 mole % to about 60 mole % of the alkyl groups present on the benzene ring of the para-alkylstyrene contain a halogen atom.
2 more elements
Dependencies are inferred from the claim text.