The Goodyear & Tire Rubber Company

Arindam Mazumdar

Frank James Feher

Paul Harry Sandstrom

Ceyhan Celik

Liqing Ma

Nihat Ali Isitman

Lucas Manuel Dos Santos Freire

The present invention is directed to a pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr),

Pneumatic tire

The present invention is directed to a method of making a copolymer, comprising the steps of at least partially epoxidizing a polyisoprene to produce an epoxidized polyisoprene; reacting the epoxidized polyisoprene with a dithiol to produce a thiol functionalized polyisoprene; and reacting the thiol functionalized polyisoprene with a thiolophile-functionalized polymer derived from a monomer having a hydrogen bond donor site and hydrogen bond acceptor site to form the copolymer.

Method of making functionalized elastomer

The present invention is directed to a bifunctionalized elastomer comprising the reaction product of (1) a living anionic elastomeric polymer initiated with a functional initiator and (2) a functional polymerization terminator.

Bifunctionalized polymer

The present invention is directed to a rubber composition comprising a bifunctionalized elastomer comprising the reaction product of 1) a living anionic elastomeric polymer initiated with a functional initiator and 2) a functional polymerization terminator; and a filler selected from silica and carbon black. The invention is further directed to a pneumatic tire comprising the rubber composition.

Rubber composition and pneumatic tire

The present invention is directed to a copolymer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diolefin monomer and optionally at least one vinyl aromatic monomer; and a polymeric side-chain bonded exclusively to a terminal end of the backbone chain, the side-chain comprising a polymer derived from a monomer having a hydrogen bond donor moiety and a hydrogen bond acceptor moiety.

Functionalized elastomer

The present invention is directed to a copolymer comprising: a polyisoprene backbone chain with a microstructure comprising grater than 98 percent by weight of cis 1,4 linkages; and polymeric sidechains bonded to the backbone chain, the sidechains comprising a polymer derived from a monomer having a hydrogen bond donor site and a hydrogen bond acceptor site.

The present invention is directed to a method of making a functionalized elastomer, comprising the steps of polymerizing at least one diene monomer and optionally a vinyl aromatic monomer in the presence of an initiator of formula (II) to produce a protected hydroxyl end-terminated polymer where R, R, Rcan all be the same or different and are selected from the group consisting of alkyls having from 1 to 8 carbon atoms, cycloalkyls having from 3 to 11 carbon atoms, or aryls having from 6 to 14 carbon atoms, Ris an alkylene having from 1 to 8 carbon atoms, a cycloalkylene having from 3 to 11 carbon atoms, or an arylene having from 6 to 14 carbon atoms, X is S, O or NH, and Li is lithium; de-protecting the protected hydroxyl end-terminated elastomer to produce a hydroxyl end-functionalized polymer; reacting the hydroxyl end-funtionalized polymer with a maleimido acid chloride to produce a maleimido end-functionalized polymer; and reacting the maleimido end-functionalized polymer with a thiol-terminated polymer derived from a monomer having a hydrogen bond donor site and a hydrogen bond acceptor site to produce the functionalized elastomer.

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Stow, OH, United States of America

Arindam Mazumdar