Patent ID: 6361872
Filing Date: 2002-03-26
Classification: C08G,C09D,C23C,C23F,Y10T

Abstract:
A metal surface treatment agent for forming an anticorrosion coating on the surface of a metal, which agent consists essentially of:(A) a primary component of at least one kind of mercapto group-containing compounds selected from the following groups: (1) a mercapto group-containing compound (a) which is obtained by condensation from the esterification reaction of polyhydric alcohol having at least two hydroxyl groups per molecule and a mercapto group-containing acid compound having at least one mercapto group per molecule and at least one carboxyl group per molecule and also which has an equivalent weight of the mercapto groups in the range of 1 through 18 millimoles/g; (2) a mercapto group-containing compound (b) which is obtained by condensation from the esterification reaction of polyhydric alcohol having at least two hydroxyl groups per molecule, a mercapto group-containing acid compound having at least one mercapto group and at least one carboxyl group per molecule, and a polyacid compound having at least two carboxyl groups per molecule, and also which has an equivalent weight of the mercapto groups in the range of 1 through 18 millimoles/g; (3) a mercapto group-containing compound (c) which is obtained by condensation from the esterification reaction of a hydroxyl group-containing resin having a hydroxyl value of at least about 30 mg-KOH/g and a mercapto group-containing acid compound having at least one mercapto group per molecule and at least one carboxyl group per molecule, and also which has an equivalent weight of the mercapto groups in the range of 1 through 18 millimoles/g; and (4) a mercapto group-containing compound (d) which both contains at least one mercapto group per molecule and at least two cross-linking functional groups, and also which has an equivalent weight of the mercapto groups in the range of 1 through 18 millimoles/g; and (B) a curing agent component wherein said agent is at least one type of compound selected from the group consisting of aminoplast compounds, polyisocyanate compounds and epoxy compounds.