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METHOD FOR HEAT STABILIZING SILICONE ELASTOMERS

IP.com Disclosure Number: IPCOM000024323D
Original Publication Date: 1980-Apr-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 51K

Publishing Venue

Xerox Disclosure Journal

Abstract

This invention relates to a method for preparing heat-stablized elastomers, particularly silicone elastomers. Metal oxides, especially those of cerium, are effective heat stabilizers for the silicone elastomers. Such elastomers are used as fuser roll coatings in copying machines. The effectiveness of such metal oxides to heat stabilize the elastomers increases as their particle size decreases. Ac-cordingly, it is desired to obtain extremely fine metals and metal oxides in the elastomers.

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(EROX DISCLOSURE JOURNAL

METHOD FOR HEAT STABILIZING SILICONE EL ASTOM ERS
Charles Scouten

Proposed Classification
U.S. C1. 260/37

Int. C1. C081

This invention relates to a method for preparing heat-stablized elastomers, particularly silicone elastomers. Metal oxides, especially those of cerium, are effective heat stabilizers for the silicone elastomers. Such elastomers are used as fuser roll coatings in copying machines. The effectiveness of such metal oxides to heat stabilize the elastomers increases as their particle size decreases. Ac- cordingly, it is desired to obtain extremely fine metals and metal oxides in the elastomers.

In accordance with the present invention, metal oxalate corresponding to the metal oxide desired, for example, cerium oxalate, is incorporated in the elastomer prior to curing. During vulcanization of the elastomer, the metal oxalate is decomposed to form carbon dioxide and atomic metal. The metal will rapidly oxidize to form the metal oxide in situ. The extremely fine particle size of the metal oxides so generated provides effective heat stabilization for the elastomer. Metal whose oxides can be so generated include cerium, iron and cobalt.

Volume 5 Number 2 March/April 1980 189

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  XEROX DISCLOSURE JOURNAL Volume 5 Number 2 March/April 1980

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