Asahi Kasei Kogyo Kabushiki Kaisha

Tsunesuke Doi

Masazumi Chono

Hiroshi Komoto

Kazuaki Saito

Akira Inoue

Isao Shinozuka

Yasushi Kishimoto

Shizuo Ishijima

Akira Ide

4-Isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I), ##STR1## and a method of preparing 4-isocyanate methyl-1,8-octamethylene diisocyanate of the formula (I) which comprises reacting 4-aminomethyl-1,8-diaminooctane of the formula (II), ##STR2## or its salt with phosgene at a temperature of about 70.degree. C. to about 220.degree. C. in an inert reaction medium.

Aliphatic triisocyanate, a method for preparing it and the preparation

A novel aqueous aluminum paste composition comprising specific amounts of a fatty acid, a fatty acid alkanolamide and a nonionic surface active agent other than the fatty acid alkanolamide as well as aluminum flakes, and water. The aqueous aluminum paste composition is well dispersible and stably storable in water and has good bubble retention characteristics when used as a foaming agent in the manufacture of light-weight foamed concrete.

Aqueous aluminum paste composition

A method of inhibiting corrosion of metals comprising applying to a metal surface in an effective concentration a saturated aliphatic triamine of 9 carbon atoms having at each terminal position a primary amino group and being branched in the 4-position of the main chain Such specific triamines include 1,3,6-triaminomethylhexane and 1,2,3-triaminoethylpropane. Addition products and condensation products derived from these organic triamines are also effective. The present anti-corrosive agents show a remarkable rust preventive effect to metals even when used in a small amount and are non-toxic.

Anti-corrosive agent for metals

A method of inhibiting corrosion of metals comprising applying to a metal surface in an effective concentration a saturated aliphatic triamine of 9 carbon atoms having at each terminal position a primary amino group and being branched in the 4-position of the main chain. Such specific triamines include 1,3,6-triaminomethylhexane and 1,2,3-triaminoethylpropane. Addition products and condensation products derived from these organic triamines are also effective. The present anti-corrosive agents show a remarkable rust preventive effect to metals even when used in a small amount and are non toxic.

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Tama, Japan

Tsunesuke Doi