The Goodyear & Tire Rubber Company

Mark Leslie Kralevich, Jr

Paul Harry Sandstrom

Edward John Blok

Lawson G Wideman

Joseph Miles Ruscak

Adel Farhan Halasa

Wen-Liang Hsu

Shingo Futamura

Angelo Bergomi

Larry Ashley Gordon

James Anderson Schlademan

James Edward Taucher

The subject invention discloses a liquid isoprene-butadiene rubber (IBR) which is particularly valuable for use in making treads for high performance automobile tires, including race tires, that exhibit superior dry traction characteristics and durability. The isoprene-butadiene rubber of this invention is a liquid at room temperature and is comprised of repeat units which are derived from about 5 weight percent to about 95 weight percent isoprene and from about 5 weight percent to about 95 weight percent 1,3-butadiene, wherein the repeat units derived from isoprene and 1,3-butadiene are in essentially random order. The IBR of this invention also has a low number average molecular weight which is within the range of about 3,000 to about 50,000 and has a glass transition temperature which is within the range of about &minus;50&deg; C. to about 20&deg; C. This invention more specifically discloses a tire tread compound which is comprised of (a) a rubbery elastomer, (b) about 20 phr to about 80 phr of an aromatic process oil, (c) about 35 phr to about 130 phr of a filler and (d) about 4 phr to about 40 phr of a liquid isoprene-butadiene rubber having a number average molecular weight which is within the range of about 3,000 to about 50,000, a glass transition temperature which is within the range of about &minus;50&deg; C. to about 20&deg; C., and wherein the liquid isoprene-butadiene polymer exhibits only one glass transition temperature.

Liquid isoprene-butadiene rubber

A pneumatic tire with a rubber tread which utilized an alpha-methyl styrene oligomer

Tire with tread which utilizes an alpha-methyl styrene oligomer

Titanate compounds

Polymeric resinous material derived from limonene, dicyclopentadiene, indene and tertiary-butyl styrene

Polymeric resinous material derived from limonene, dicyclopentadiene, indene and alpha-methyl styrene

The present invention relates to titanate compounds of the formula

The invention relates to preparation of EPDM-based and EPR-based rubber compositions which are vulcanized with peroxide together with a specified combination of sulfur and acrylate co-agents. The invention further relates to articles having at least one component thereof.

Preparation of peroxide vulcanized rubber composition and articles having at least one component thereof

This invention relates to a novel class of polymeric resins which have a softening point ranging from about 50&deg; C. to about 220&deg; C. and a molecular weight ranging from about 500 to about 42,000. The resins comprise the polymers which result from the polymerization reaction between dimethyl dicyclopentadiene and limonene. The polymeric resins are particularly useful in improving traction of the rubber when used in tire treads.

Polymeric dimethyl-dicyclopentadiene/limonene resin

Polymeric resinous material derived from limonene, dicyclopentadiene and tertiary-butyl styrene

Polymeric resinous material derived from limonene dicyclopentadiene indene and alpha-methyl styrene

Polymeric dimethyl- dicyclopentadiene/limonene resin

This invention relates to a rubber composition composed of high Tg diene-based elastomers and which contains a high Tg liquid polymer of high vinyl polybutadiene and to such a composition being sulfur cured. The invention also relates to a tire having a tread of such rubber composition.

Rubber composition with liquid high Tg polymer and tire with tread thereof

Pneumatic tire characterized by improved dry traction and durability having a tread comprised of a diene-based elastomer containing olefinic unsaturation and 1-80 phr of a polymeric resinous material comprising: (1) from 5 to 70 weight % units derived from limonene; (2) from 5 to 70% units derived from dimethyl-dicyclopentadiene; (3) from 5 to 45 weight % units derived from indene; and (4) from 5 to 45 weight % units derived from vinyl toluene, wherein the sum of the weight percent units derived from limonene and dimethyl-dicyclopentadiene range from 40 to 75 weight percent units of the resin, and the sum of weight percent units derived from indene and vinyl toluene range from 25 to 60 weight percent units of the resin.

Polymeric resinous material derived from limonene, dimethyl-dicyclopentadiene, indene and vinyl toluene

The present application relates to a pneumatic tire having a tread comprised of (a) a diene-based elastomer containing olefinic unsaturation and (b) from 1 to 50 phr of polymeric resinous material comprising from about 4 to about 60 weight percent units derived from piperylene, from about 10 to about 35 weight percent units derived from 2-methyl-2-butene and from about 18 to about 50 weight percent units derived from dicyclopentadiene.

Growing community of inventors

Copley, OH, United States of America

Mark Leslie Kralevich, Jr