Acrylic metal surface treatment composition with hydroxy and amino/ammonium functionality
AssigneeNippon Paint Co., Ltd.
InventorsYasuhiro Shibata, Tomoyuki Kanda, Atsuhiko Tounaka, Susumu Maekawa, Kiyotada Yasuhara
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Abstract
A metal surface treatment composition is provided which improves corrosion resistance and film adhesion, and confers slip properties. This composition is an acrylic resin-containing metal surface treatment composition which is water-soluble, water-dispersible or emulsifiable, which comprises an acrylic resin, this resin comprising either or both of an amino group and an ammonium group together with a hydroxyl group and a hydrophobic group, and which further comprises a heavy metal or one of its salts.
Claims25
An acrylic resin-containing metal surface treatment composition that confers lubricity on metal surfaces comprising:
- (1) a water-soluble, water-dispersable or emulsifiable acrylic resin comprising (1a) an amino group, an ammonium group, or both;
- (1b) a hydroxyl group;
- and (1c) at least one hydrophobic group, introduced by copolymerization of a monomer having the structure shown by the following chemical formula (VI):
- where R16 is a straight, branched or cyclic group having from 4-20 carbon atoms, and R17 is hydrogen or methyl, and
- (2) a heavy metal or one of its salts;
- wherein said acrylic resin comprises 1-10 of at least one group selected from amino and ammonium, 1-10 of hydroxyl groups and 1-5 of hydrophobic groups per 1000 units of its molecular weight;
- and
- wherein the copolymerization ratios of the monomers of the acrylic resin copolymer comprising said acrylic resin are from 5-60 weight percent of amino or ammonium group-containing acrylic monomer, from 20-80 weight percent of hydroxyl group-containing acrylic monomer, from 5-50 weight percent hydrophobic group-containing acrylic monomer, and from 0-30 weight percent of at least a monomer selected from acrylic acid, methacrylic acid, maleic acid, itaconic acid and acrylonitrile.
Dependencies are inferred from the claim text.