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US 2025/0084190 A1Published application
Compositions including functionalized silylated polymers, cured compositions and methods
AssigneeBridgestone Corporation
InventorsSem TAMANG, Shammi AHMED, Bret J. CHISHOLM
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Abstract
Polymer compositions including a silylated polymer derived from a polydiene polymer modified with a grafting agent including a silyl group and polar functional group. The polymer compositions are rubber blends that can be cured, wherein the silylated polymers aid in providing cured products thereof, such as tires, with improved properties. Methods for preparing the compositions and cured products such as tire components.
Claims18
A curable polymer composition, comprising:
- a silylated polydiene polymer comprising a reaction product of i) a polydiene and ii) a silylating grafting agent having the formula:
- wherein n is an integer from 0 to 150, and each R individually is a hydrogen atom, a halogen atom, Fg, or a monovalent organic group, or where two or more R groups join to form a bond or a polyvalent organic group, with the proviso that at least one R is a hydrogen atom;
- wherein Fg is derived from a compound having the formula CH2═C(R1)(R2), wherein at least one of R1 and R2 have a functionality that may participate in hydrogen bonding, a chemical reaction with a filler or polymer grafting and one of R, and R2 may be a hydrogen atom or an organic group, or
- wherein R is a hydrogen atom, a halogen atom, Fg or a monovalent organic group, Fg is as defined above, and n is 2 to 5;
- a non-silylated polydiene polymer comprising one or more of natural rubber, styrene-butadiene copolymer, and poly(1,3-butadiene);
- and
- a filler comprising one or more of carbon black and silica.
4 more elements
Dependencies are inferred from the claim text.