Sumitomo Metal Industries, Inc.

Nippon Paint Compnay, Ltd.

Nitto Electric Industrial Co., Ltd.

Seitetsu Kagaku Co., Ltd.

Tetsuzo Arai

Kunihiro Fukui

Iwao Sumiyoshi

Kunioki Kato

Isao Fujita

Minoru Nishihara

Yoshiyasu Morita

Masakazu Ohkita

Hisakazu Kawashima

Koichi Fujiki

Hiroshi Matsuoka

Miyoshi Koyama

Toshiharu Nakagawa

Ryoii Ishihara

Koichi Yamada

Yasushi Yamamoto

Manasori Yoshiiwa

Yasuhiko Okamoto

Kunitoshi Kimura

Mitsuyuki Raijo

Kohji Noji

A radiation curable primer coating composition is provided comprising (a) a reaction product of an epoxide compound and an ethylenically unsaturated monocarboxylic acid, (b) a compound of the formula: ##STR1## wherein R is hydrogen atom or methyl, A is a C.sub.2 -C.sub.4 alkylene group, and n is 0, 1 or 2; and (c) a compound having at least one epoxy group per molecule. The composition may be applied onto a steel substrate and cured by the irradiation of an actinic radiation for improving properties of subsequently applied polyolefin coatings thereon.

Radiation curable primer coating compositions

An actinic radiation-curable, rust-preventive coating composition suitable for use in temporary protection of steel products from rusting and having improved rust preventing property even in the presence of oil on the steel surface is disclosed. The coating composition comprises: (A) from 10 to 50 parts by weight of a vinyl polymer having a glass transition temperature of not lower than 5.degree. C. and a solubility parameter in the range of 9 to 11.5; (B) from 50 to 90 parts by weight of one or more polymerizable compounds having at least one unsaturated group capable of initiating reaction by actinic radiation; and (C) from 0.1 to 20 parts by weight of an organic phosphate of the formula: ##STR1## wherein R.sub.1 is hydrogen or methyl; Y is a straight or branched chain alkylene having 2 to 20 carbon atoms which may be interrupted by one or more ester or oxy linkages and/or aromatic rings; and n is an integer of 1 to 3.

Actinic radiation-curable rust-preventive coating compositions for steel

An FRP pipe having threaded ends at both ends, such as casing, tubing, and coupling, is disclosed, which is characterized in that metal plating is formed on the surface of at least one of the threaded ends.

FRP pipe with threaded ends

Oil well pipe joint and manufacturing method therefor

A coating composite containing sulfochlorinated polyolefin having a sulfur content ranging from 0.2 to 2.5% by weight and a chlorine content ranging from 18 to 37% by weight is applied directly as an adhesive layer or is applied on one surface of a thermoplastic resin base to be contacted with a metal surface, which resin base is coated on the metal surface. When the coating composite is pressed thereafter under a pressure, a coating on the metal surface with excellent adhesion, water and impact resistances is provided.

Process for adhering polyethylene to steel substrates

Growing community of inventors

Takarazuka, Japan

Tetsuzo Arai