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US 10,501,584 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.
Claims18
A rubber composition comprising
- (a) 10-100 phr of a terminal-functionalized polymer having a vinyl bond content of at least about 20% and the following structure
- wherein P is a polymer chain comprising a randomized configuration of at least one type of conjugated-diene monomer and at least one type of vinyl aromatic monomer;
- Ra, Rb, Rc and Rd are the same or different and each is independently selected from H, alkyl groups having 1 to 20 carbon atoms, cycloalkyl groups having 3 to 20 carbon atoms, alkylaryl groups having 7 to 20 carbon atoms,
- Re is independently selected from:
- (i) H, an alkyl group having 1 to 20 carbon atoms, and an alkoxy group having 1 to 20 carbon atoms,
- (ii) cycloalkyl group or cycloalkoxy groups having 3 to 20 carbon atoms, and
- (iii) alkylaryl or alkaryloxy groups having 7 to 20 carbon atoms;
- and m is 1 to 20;
- (b) 0-90 phr of at least one rubber;
- and
- (c) about 10 to about 150 phr of silica filler.
8 more elements
A method for improving the filler dispersion in a silica-filled rubber composition, the method comprising
- utilizing 10-100 phr of a terminal-functionalized polymer having a vinyl bond content of at least about 20% and the following structure
- wherein, P is a polymer chain comprising a randomized configuration of at least one type of conjugated-diene monomer and at least one type of vinyl aromatic monomer,
- Ra, Rb, Rc and Rd are the same or different and each is independently selected from H, alkyl groups having 1 to 20 carbon atoms, cycloalkyl groups having 3 to 20 carbon atoms, alkylaryl groups having 7 to 20 carbon atoms,
- Re is independently selected from:
- (i) H, an alkyl group having 1 to 20 carbon atoms, and an alkoxy group having 1 to 20 carbon atoms,
- (ii) cycloalkyl group or cycloalkoxy groups having 3 to 20 carbon atoms, and
- (iii) alkylaryl or alkaryloxy groups having 7 to 20 carbon atoms;
- and m is 1 to 20;
- 0-90 phr of at least one rubber,
- 10-200 phr of silica filler, and
- a cure package
- to produce a silica-filled rubber composition.
9 more elements
Dependencies are inferred from the claim text.