COATING AGENT FOR RUBBER-COATED CYLINDER HEAD GASKETS, AND CYLINDER HEAD GASKET

Title:

COATING AGENT FOR RUBBER-COATED CYLINDER HEAD GASKETS, AND CYLINDER HEAD GASKET

Document Type and Number:

WIPO Patent Application WO/2018/105531

Kind Code:

A1

Abstract:

A coating agent for rubber-coated cylinder head gaskets, which is characterized in that: a lubricant and a urethane resin are contained therein; the lubricant is composed of uncalcined polytetrafluoroethylene resin particles having an average primary particle diameter of 1 μm or less; and the content of the uncalcined polytetrafluoroethylene resin particles in the solid contents is 30-80% by volume. Consequently, the present invention is able to provide: a coating agent for rubber-coated cylinder head gaskets, which is capable of forming a coating film that has excellent wear resistance at high contact pressure under high temperature conditions, and makes the adhesion of a rubber layer to the sealing surface of a cylinder block or a cylinder head less likely after use at high contact pressure under high temperature conditions; and a cylinder head gasket which is obtained using this coating agent for rubber-coated cylinder head gaskets.

Inventors:

WATANABE TOMOKAZU (JP)
KITAJIMA NAHOKO (JP)
MORI HIDEAKI (JP)
NAKAJIMA YOU (JP)

Application Number:

PCT/JP2017/043338

Publication Date:

June 14, 2018

Filing Date:

December 01, 2017

Export Citation:

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Assignee:

NICHIAS CORP (JP)

International Classes:

F02F11/00; B32B15/06; C09D7/40; C09D175/04; C09K3/10; F16J15/08

Domestic Patent References:

WO2014050722A1

2014-04-03

Foreign References:

JP2014193454A	2014-10-09
JP2001031862A	2001-02-06
JP2004076699A	2004-03-11
JPH07233873A	1995-09-05
JP2016008254A	2016-01-18
JPH09157588A	1997-06-17
JPH03252442A	1991-11-11
JPH05341494A	1993-12-24
JP2008260809A	2008-10-30
JP2008189892A	2008-08-21

Other References: