Rubber-metal laminated gasket material

Patent metadata

Field	Value
Publication number	US-10280869-B2
Application number	US-201414901273-A
Country	US
Kind code	B2
Filing date	Jan 24, 2014
Priority date	Jun 25, 2013
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A rubber-metal laminated gasket material comprising a metal plate, a surface treating agent layer, an adhesive layer, and a rubber layer, the layers being sequentially laminated on the metal plate; wherein the surface treating agent layer is formed by applying a surface treating agent so that the coating amount on one surface is 30 to 1,000 mg/m2, and the surface treating agent is free from chromium, has a mixing ratio of 20 to 90 wt. % of a fluorine-free titanium compound and 10 to 80 wt. % of alumina, and has a metal titanium content of 1 to 20 wt. %. The rubber-metal laminated gasket material has excellent LLC resistance under high temperature conditions.

First claim

The invention claimed is:

1. A rubber-metal laminated gasket material comprising a metal plate, a surface treating agent layer, an adhesive layer, and a rubber layer, the layers being sequentially laminated on the metal plate in the recited order;
wherein the surface treating agent layer is formed by applying a surface treating agent so that the coating amount on one surface is 30 to 1,000 mg/m 2 , and the surface treating agent is free from chromium, has a mixing ratio of 20 to 90 wt. % of a fluorine-free titanium compound and 10 to 80 wt. % of alumina, and the surface treating agent has a metal titanium content of 1 to 20 wt. %,
wherein the fluorine-free titanium compound is at least one of titanium lactate, ammonium titanium lactate, titanium sulfate, titanium oxysulfate, ammonium titanium sulfate, titanium nitrate, titanium oxynitrate, and ammonium titanium nitrate.

2. The rubber-metal laminated gasket material according to claim 1 , wherein the alumina is alumina sol.

3. The rubber-metal laminated gasket material according to claim 1 , wherein the rubber is fluororubber or nitrile rubber.

4. The rubber-metal laminated gasket material according to claim 1 , which is used as an engine cylinder head gasket.

5. An engine cylinder head gasket using the rubber-metal laminated gasket material according to claim 4 .

Assignees

• Nok Corp

Inventors

• Tanaka Nobuaki
• Sato Takeshi
• Abe Katsumi

Classifications

• B32B2307/7265

  Non-permeable · CPC title

• B32B2581/00

  Seals; Sealing equipment; Gaskets · CPC title

• B32B15/06 Primary

  of {natural rubber or synthetic} rubber · CPC title

• B32B2255/06

  on metal layer · CPC title

• B32B2255/26

  Polymeric coating · CPC title