POLYURETHANE RESIN HEAVY CORROSION-RESISTANT COATED STEEL MATERIAL HAVING NORMAL TEMPERATURE COATING EPOXY PRIMER

Japanese Patent JP2016203388

A

PROBLEM TO BE SOLVED: To provide a method for capable of bonding an epoxy resin having good anticorrosion property and a polyurethane resin corrosion prevention layer even in normal temperature production which solves the problem that the kind of steel material applicable to a polyurethane resin heavy corrosion-resistant primer is restricted because heating is essential so as to stably secure adhesiveness between the epoxy resin and the polyurethane resin corrosion prevention layer when the epoxy resin is used in the primer.SOLUTION: A curing agent obtained by modifying 80% or more of specific amine is used as a curing agent component of a solventless epoxy resin, and thereby production of carbonate serving as a normal temperature adhesion inhibitor factor is suppressed. A method for coating a polyurethane resin after epoxy curing prevents an urea bond of an amine in epoxy and isocyanate in a polyurethane resin serving as the adhesion inhibitor factor. The methods enable a conventional steel material which is hardly heated to be subjected to polyurethane resin heavy corrosion resistance having high anticorrosion property using the epoxy as a primer.SELECTED DRAWING: Figure 1

YOSHIZAKI NOBUKI
URATA SHINYA
SASAKI TORU
NAKAJIMA TAIJI

JP2015083538A

December 08, 2016

April 15, 2015

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NIPPON STEEL & SUMITOMO METAL CORP
NITTO CHEMICAL CO LTD

B32B15/08; C09D5/00; C09D7/12; C09D163/00; C09D175/00; C23C28/00

JP2008075033A	2008-04-03
JP2006110753A	2006-04-27
JP2007321363A	2007-12-13

Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Fukuchi Ritsuo
Yoshihiro Kobayashi
Satoshi Deno

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