The Goodyear & Tire Rubber Company

David Michael Smith, Sr

Adel Farhan Halasa

Wen-Liang Hsu

Richard Michael D'Sidocky

Warren James Busch

Bernard Matthew Bezilla, Jr

Leighton Randolph Spadone

Scott Edwards Johnson

Mark Andrew Marinko

John Kotanides, Jr

Daniel E Schuster

John R White

John Joseph Andre Verthe

Michael B Rodgers

Bina Patel Botts

Leh-Yeh Hsu, Legal Representative

Henry T Kwee

Jennifer Elizabeth Labbe

Ronald James Dill

A heterogeneous rubbery polymer is provided that includes a polymer chain derived from a vinyl aromatic monomer and a conjugated diolefin monomer, wherein from greater than 20 weight percent to about 40 weight percent of units in the rubbery polymer are derived from the vinyl aromatic monomer and from about 60 weight percent to about 80 weight percent of units in the rubbery polymer are derived from the conjugated diolefin monomer. The polymer chain is further characterized by having greater than zero and less than about 30 weight percent of the vinyl aromatic units in sequences containing 1 vinyl aromatic unit, from about 5 weight percent to about 20 weight percent of the vinyl aromatic units in sequences containing 5 to 8 vinyl aromatic units, and greater than zero and less than about 5 weight percent of the vinyl aromatic units in sequences containing 9 or more vinyl aromatic units.

Heterogeneous rubbery polymers having random, tapered, and block portions therein and methods of making same

The present invention reveals a tire having a tread that is comprised of (1) 30 phr to 80 phr of a non-random styrene-butadiene rubber comprised of polymer chains that are derived from styrene and 1,3-butadiene, wherein from about 10 weight percent to about 50 weight percent of the repeat units in the styrene-butadiene rubber are derived from styrene, wherein from about 60 weight percent to about 90 weight percent of the repeat units in the styrene-butadiene rubber are derived from 1,3-butadiene, wherein from about 30 weight percent to about 50 weight percent of the styrene repeat units are in sequences containing 5 to 20 styrene repeat units, wherein the bound styrene content found in the first half of the polymer chains differs from the bound styrene content found in the second half of the polymer chains by at least 5 weight percent, wherein the styrene-butadiene rubber has a 1,2-vinyl content which is within the range of about 8 percent to about 20 percent, wherein the styrene-butadiene rubber has a number average molecular weight which is within the range of 200,000 to 475,000, and wherein the styrene-butadiene rubber has a glass transition temperature which is within the range of &#x2212;82&#xb0; C. to &#x2212;50&#xb0; C. and (2) 20 phr to 70 phr of polybutadiene. The tire tread formulation can optionally contain silica and lignin.

Non-random styrene-butadiene rubber

This invention relates to a pneumatic tire with puncture sealing property and a method for preparing such tire. Such tire is prepared by building an uncured butyl rubber-based layer, which contains a peroxide and a dispersion therein of a particulate precured rubber selected from pre resin-cured butyl rubber and/or pre sulfur-cured diene-based elastomer, into an uncured tire and between an innerliner layer and the tire carcass. Upon curing the prepared tire under conditions of elevated temperature, a major portion of the uncured butyl rubber composition is depolymerized to form a tacky material, which contains said dispersion therein of said particulate precured rubber, which has puncture sealant properties. Such layer of depolymerized butyl rubber and dispersed precured rubber particles may be collectively referred to as the sealant layer.

Self-sealing pneumatic tire and preparation thereof

A method is disclosed for increasing the rate of vulcanization of a halogenated isobutylene sulfur rubber composition comprising heating said halogenated isobutylene rubber composition to a temperature ranging from 100&deg; C. to 200&deg; C., wherein said halogenated isobutylene rubber composition contains from 0.05 to 10 phr of sodium thiosulfate pentahydrate.

Halogenated isobutylene rubber composition containing sodium thiosulfate pentahydrate

Tire tread

Growing community of inventors

Wadsworth, OH, United States of America

David Michael Smith, Sr