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Browse Prior Art Database

FUSER ROLL COATINGS

IP.com Disclosure Number: IPCOM000024223D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 91K

Publishing Venue

Xerox Disclosure Journal

Abstract

In order to render an elastomeric material thermally conducting, large volume quantities of high thermal conductivity fillers are incorporated therein. In a paper en titled, Conductive Polymeric Compositions, Polymer Engineering and Science, Volume 17, December 1977, pages 842-847, there is a detailed discussion regarding the addition of conductive fillers to polymer materials to increase thermal conductivity. However, problems are encountered because the high volume loading of such fillers causes the elastomer to become weak; that is, the high volume loading causes low tensile strength, low percent elongation and low tear strength. Furthermore, the high volume loading of such fillers complicates the processing of the elastomeric material. The weakening effect has been visualized as being caused by a dewetting of the filler particles from the elastomer matrix. The material is hard to process because of insufficient dispersion of the filler particles within the elastomer matrix.

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CEIROX DISCLOSURE JOURNAL

FUSER ROLL COATINGS Proposed Arnold W. Henry Classifications

U.S. C1. 428/375 Int. Cl. D02g 3/00

In order to render an elastomeric material thermally conducting, large volume quantities of high thermal conductivity fillers are incorporated therein. In a paper en titled, Conductive Polymeric Compositions, Polymer Engineering and Science, Volume 17, December 1977, pages 842-847, there is a detailed discussion regarding the addition of conductive fillers to polymer materials to increase thermal conductivity. However, problems are encountered because the high volume loading of such fillers causes the elastomer to become weak; that is, the high volume loading causes low tensile strength, low percent elongation and low tear strength. Furthermore, the high volume loading of such fillers complicates the processing of the elastomeric material. The weakening effect has been visualized as being caused by a dewetting of the filler particles from the elastomer matrix. The material is hard to process because of insufficient dispersion of the filler particles within the elastomer matrix.

In accordance with the present disclosure, the filler is treated with an alkoxy o rgano titanate, for example, isopropoxy dime th ylacr ylti t anate, isostearoy 1 di- methacryltitanate, and the like, either prior to its addition.to the elastomer or immediately after the filler is added to the elastomer. The organotitanate bonds covalently to the high thermally conductive filler through the alkoxy group and allows the organo part of the titanate to intermix with the elastomeric material.

The alkoxy organotitanate imparts an organic coating around all of the filler pa...