The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 19, 2013
Filed:
Nov. 14, 2011
Tomomitsu Nagareo, Moriyama, JP;
Yoshinori Kameda, Kusatsu, JP;
Keishi Matsumoto, Takarazuka, JP;
Takayuki Kamimura, Takarazuka, JP;
Masaru Takahashi, Nishinomiya, JP;
Kunio Goto, Kobe, JP;
Ryuichi Imai, Kainan, JP;
Tomomitsu Nagareo, Moriyama, JP;
Yoshinori Kameda, Kusatsu, JP;
Keishi Matsumoto, Takarazuka, JP;
Takayuki Kamimura, Takarazuka, JP;
Masaru Takahashi, Nishinomiya, JP;
Kunio Goto, Kobe, JP;
Ryuichi Imai, Kainan, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Vallourec Mannesmann Oil & Gas France, Aulnoye-Aymeries, FR;
Chugoku Marine Paints, Ltd., Hiroshima, FR;
Abstract
A thin and highly transparent coating having excellent air tightness, adhesion to a substrate, lubricating properties, galling resistance, and corrosion resistance is formed on the surface of a metal substrate and particularly on the surface of a threaded joint which is used for connection of oil country tubular goods. A photocurable composition comprising (A) a photocurable (meth)acrylate resin, (B) a (meth)acrylate monomer selected from a monofunctional (meth)acrylate monomer and a difunctional (meth)acrylate monomer, (C) a trifunctional or higher multifunctional (meth)acrylate monomer, (D) a photopolymerization initiator, (E) a benzotriazole anticorrosive agent, (F) an anticorrosive pigment selected from a phosphate anticorrosive pigment and calcium ion-exchanged silica, and (G) a phosphate ester is used to form a photocured coating.