Tokai Rubber Industries, Ltd.

Motohide Nishimura

Hiroyoshi Mori

Shinobu Kanbe

Masashi Noda

Akira Takayanagi

Chiaki Yuzuriha

Masashi Kondo

Tetsuya Souji

An acrylic rubber composition in which the base material is an acrylic rubber comprising monomer units of ethyl acrylate, n-butyl acrylate, and cure site monomer, with a ratio (B/A) of the amount of n-butyl acrylate (B) with respect to ethyl acrylate (A) of 1.0 or less by weight. A heat-resistant hose having a layer of this acrylic rubber composition as the innermost layer. The above constitution of the invention provides the acrylic rubber composition effective for preventing aluminum fixing while retaining the material properties of acrylic rubber and its excellent characteristics. The present invention also provides a heat-resistant hose using this acrylic rubber composition at the surface which is to be fitted with an aluminum member.

Joining structure for an acrylic rubber composition and heat-resistant hose

A quick connector is provided with a connector housing and a wire retainer. The connector housing has a retainer mounting portion which is formed with engagement slits. The wire retainer is mounted on the retainer mounting portion such that engaging arms enter the engagement slits and project in the retainer mounting portion. Each of the engaging slits has a width larger than a diameter of the engaging arm in order to generate a collision noise by collision between the engaging arm and the connector housing or the pipe upon completion of closing motion of the engaging arms.

Quick connector

A first quick connector is provided with a connector housing and a wire retainer. The connector housing has a retainer mounting portion which is formed with engagement slits. The wire retainer is mounted on the retainer mounting portion such that engagement arms enter the engagement slits and project in the retainer mounting portion. Each of the engagement slits has a first slit part on one circumferential end and a second slit part on the other circumferential end with intervening a divider portion therebetween.

Acrylic rubber composition and heat-resistant hose

A hose clamping structureincludes: a metal pipehaving an inserting end portionstraightly extending in an axial direction at one end and having a ring-shaped projecting portionat a leading end of the inserting end portion; a rubber hoseinsertedly fitted to the entire outer surface of the inserting end portion by press-fitting and secured thereto in an unbonded manner; and a tubular sleeve membermounted to the outer surface of the rubber hose and extending over the substantially full length of the inserting end portion, and tightened from outside so as to clamp the rubber hose. The sleeve member includes a second tightening portionand a first tightening portionapart from each other in an axial direction. The first tightening portion includes a tubular portionsubstantially parallel with the axial direction at the side of the second tightening portion, and a tapered portiontapered and widened into a conical shape from the tubular portion toward the leading end of the inserting end portion.

Hose clamping structure

A fuel hose comprising an inner layer formed of FKM and an outer layer formed of an NBR.PVC blend that are adhered well by vulcanization and having an excellent resistance to gasoline and an excellent weatherability, wherein the polymerization degree and the amount of PVC in the blend are specified in fixed ranges a carboxylic acid 1,8-diazabicyclo(5,4,0)-undecene-7 salt is incorporated in the NBR.PVC blend, and a polyol-type vulcanizing agent is incorporated in the FKM.

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Kani, Japan

Motohide Nishimura