The Goodyear & Tire Rubber Company

Jerry L Brenner

Paul Harry Sandstrom

Syed K Mowdood

Eilert A Ofstead

Walter H Waddell

Jimmy L Richards

Eric C Mizner

Derek Shuttleworth

Richard G Bauer

William Paul Francik

George Philemon Patitsas

Kevin James Pyle

Mark S Sinsky

Samson Samuel Apticar

David Allan Kindry

A pneumatic tire, which has belts, gum strips and an overlay, which contain 2-15 phr of thermoplastic reinforcing polymer as an addition to a compound or as a replacement for 5-25 phr of carbon black, has good high speed properties.

Tires having improved high speed properties

In a tire having a tread with cap/base construction, a regulated amount of partially crosslinked natural rubber in a tire tread compound increases the uncured ('green') stiffness, tensile strength and tear resistance of a green compound used for the base without adversely affecting physical properties of the tread after it is cured. Such green stiffness is particularly useful in the construction of a tread for a pneumatic tire, which tread is of cap/base construction because stiffness provides requisite dimensional stability of both cap and base (in the tread) during the curing of the tire. The amount of partially crosslinked natural rubber used in a tread compound depends upon the extent of crosslinking in the natural rubber, the non-crosslinked remainder being virgin latex.

Tire tread compounds comprising partially crosslinked natural rubber

This invention is directed to treating the surfaces of rubber-reinforcing materials with a gas plasma of O.sub.2 and CF.sub.4 to activate the surfaces to make them more receptive to adhesives. Optionally the surfaces of the reinforcing materials may be exposed to a polymerizing gas plasma such as a thio-carbon to coat the surfaces of the reinforcing material with substances that promote adhesion to rubber. The treated surfaces have been shown to adhere directly to rubber when vulcanized in the normal fashion.

Process for the surface treatment of polymers for

The present invention relates to a rubber stock comprising

Rubber stock containing high trans polybutadiene

The present invention relates to a rubber stock containing 0.1 to 10.0 phr of a polyhydric phenoxy resin. The polyhydric phenoxy resins may be used as a replacement for resorcinol and function as a methylene acceptor. The rubber stocks of the present invention exhibit improved tensile strength at break without the inherent fuming problems associated with resorcinol containing rubber stocks. These beneficial properties are obtained while maintaining high low strain stiffness and cord adhesion associated with resorcinol containing stocks.

Rubber stock containing a polyhydric phenoxy resin

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Copley, OH, United States of America

Jerry L Brenner