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The Goodyear & Tire Rubber Company

William R Krumm

Richard L Antrim

David Andrew Benko

James Gregory Gillick

Barbara A Metz

Walter H Waddell

Gordon E Pickett

Larry R Evans

Deborah H Carter

Heikki Lommi

Benjamin F Benton

Gary W Stuhlfauth

Adsorption material, preferably substantially spherical, wherein support particles having cellulose capable of binding charged particles such as proteins, are distributed over the exterior surfaces thereof, and a method for generating substantially spherical adsorption material.

Adsorption material and method

There is disclosed the use of microencapsulated antidegradants in rubber and a process for the production of microencapsulated antidegradants. More specifically, this invention is directed to the cellulose acetate microencapsulation of para-phenylene diamine based antiozonants at wall to core ratios greater than 1:1 but less than 4:1. The microcapsules preferably have a particle diameter of less than 50 microns. The microencapsulated antidegradant prepared and used according to this invention provides long term protection to rubber articles that are subject to ozone and oxygen attack.

Rubber containing microencapsulated antidegradants

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Reynoldsburg, OH, United States of America

William R Krumm