Nok Corporation

Taichi Kano

Tomohiro Kaise

Isao Watanabe

Atsushi Yokota

An object is to provide a metal surface treatment agent which can be coated by screen printing, and can be effectively used for metal surface treatment at the time of forming a rubber-metal complex excellent in water resistance and heat resistance, and the object can be solved by a metal surface treatment agent which comprises an organometallic compound, silica, magnesium silicate hydrate, and an organic solvent represented by the following general formula (I):R&#x2014;O&#x2014;(CH2)2OH&#x2003;&#x2003;General formula (I)[wherein R represents an alkyl group having 3 or more carbon atoms or an aryl group.]

Metal surface processing agent

A rubber metal adhesive can be coated by screen printing, and can be effectively used for metal surface treatment at the time of forming a rubber-metal complex excellent in water resistance and heat resistance. The rubber metal adhesive comprises an organometallic compound, silica, magnesium silicate hydrate, and an organic solvent represented by the following general formula (I):R&#x2014;O&#x2014;(CH2)2OH&#x2003;&#x2003;General formula (I)[wherein R represents an alkyl group having 3 or more carbon atoms or an aryl group.]

Rubber-metal adhesive

The purpose of the present invention is to provide a gasket material that is capable of preventing corrosion caused by sulfur element, can be used as a seal part for a product that is easily damaged by corrosion, such as an electronic part, and is capable of forming a tight seal under low surface pressure with a material having low rigidity and inadequate reliability such as to have a blowhole, and that can prevent reduction in bolt axial load without producing plastic flow (setting) under pressure. The purpose is achieved by a gasket material in which a foamed rubber layer having a closed cell structure is formed, via an adhesive layer, on at least one side of a metal plate, wherein the foamed rubber layer comprises a carboxyl group-modified nitrile rubber, the expansion ratio of the foamed rubber layer is 2.0 to 3.0, and the foamed rubber layer is crosslinked with an epoxy compound.

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Kanagawa, Japan

Taichi Kano