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US 11,111,338 B2Granted
Terminal-functionalized polymer and related methods
AssigneeBridgestone Corporation
InventorYuan-Yong Yan
Life of this patent
Estimating the term…
Abstract
Disclosed herein are terminal-functionalized polymers functionalized with silicon-containing functionalizing agents, rubber compositions including the polymers, methods for improving the cold flow resistance of a polymer, methods for improving the filler dispersion of a silica-filled rubber composition, and processes for preparing the terminal-functionalized polymer.
Claims33
A rubber composition comprising:
- 10-100 phr of a terminal-functionalized polymer having the following formula (II):
- wherein P is a polymer chain comprising at least one type of conjugated-diene monomer;
- Ra and Rc are the same or different and each is independently selected from vinyl-containing groups,
- Rb is selected from:
- (i) an alkyl group having 1 to 20 carbons,
- (ii) a cycloalkyl group having 3 to 20 carbons, and
- (iii) an alkylaryl group having 7 to 20 carbons;
- and
- n is 2 to 20;
- silica filler;
- no more than about 10 phr of oil;
- and a cure package.
9 more elements
A rubber composition comprising:
- about 40 to about 60 phr of a terminal-functionalized polymer having the following formula (II):
- wherein P is a polymer chain comprising at least one type of conjugated-diene monomer;
- Ra and Rc are the same or different and each is independently selected from H, alkyl groups having 1 to 20 carbons, cycloalkyl groups having 3 to 20 carbons, alkylaryl groups having 7 to 20 carbons, and vinyl-containing groups,
- Rb is selected from:
- (i) an alkyl group having 1 to 20 carbons,
- (ii) a cycloalkyl group having 3 to 20 carbons, and
- (iii) an alkylaryl group having 7 to 20 carbons;
- and
- n is 2 to 20;
- silica filler;
- no more than about 10 phr of oil;
- and a cure package.
9 more elements
Dependencies are inferred from the claim text.