Aqueous coating composition
AssigneeKansai Paint Co., Ltd.
InventorsTetsuo Aihara, Yasuharu Nakayama
Life of this patent
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Abstract
An aqueous coating composition which is characterized in that it contains an aqueous solution or dispersion of a resin formed through copolymerization of a monomeric mixture composed of (A) an ethylenically unsaturated monomer containing at least one urethane linkage and at least two non-conjugated double bonds per molecule 5-98 parts by weight, (B) an ethylenically unsaturated carboxylic 0.5-20 parts by weight, and (C) an ethylenically unsaturated monomer or monomers other than (A) and (B) 0-94.5 parts by weight, the total sum of (A), (B) and (C) components being 100 parts by weight.
Claims25
An aqueous coating composition which contains an aqueous solution or dispersion of a copolymer of
- (A) 5-98 parts by weight of an ethylenically unsaturated monomer containing at least one urethane linkage and at least two non-conjugated double bonds per molecule, which is a reaction product of an isocyanate-containing unsaturated monomer and a hydroxyl-containing compound having at least two non-conjugated double bonds, in which the isocyanate-containing unsaturated monomer is selected from the group consisting of (a) monomers of the formula (I) ##STR13## in which R.sub.1 stands for a hydrogen atom or a methyl group, and n is an integer of 1 through 8, (b) monomers of the formula (II) ##STR14## in which R.sub.1 and n are as above-defined, and R.sub.2 stands for a hydrogen atom or a C.sub.1 -C.sub.5 alkyl group, and (c) monomers obtained by reacting about 1 mol of a hydroxyl-containing monomer selected from hydroxyl-containing (meth)acrylic acid ester monomers of the formulae (III) and (IV) ##STR15## in which R.sub.1 and n are as above-defined, and a and b each denotes an integer of 0-8, provided a+b is 1-8, N-methylol(meth)acrylamide and allyl alcohol, with about 1 mol of a diisocyanate compound,
- (B) 0.5-20 parts by weight of an ethylenically unsaturated carboxylic acid, and
- (C) 0-94.5 parts by weight of an ethylenically unsaturated monomer or monomers other than those in said (A) and (B),
- the total sum of said (A), (B) and (C) components being 100 parts by weight, said copolymer having a number average molecular weight of from about 500 to 1,000,000.
An aqueous coating composition which contains an aqueous solution or dispersion of a copolymer of
- (A) 5-98 parts by weight of an ethylenically unsaturated monomer containing at least one urethane linkage and at least two non-conjugated double bonds per molecule, which is a reaction product of a hydroxyl-containing acrylic monomer and an isocyanate-containing compound having at least two non-conjugated double bonds,
- (B) 0.5-20 parts by weight of an ethylenically unsaturated carboxylic acid, and
- (C) 0-94.5 parts by weight of an ethylenically unsaturated monomer or monomers other than those in said (A) and (B),
- the total sum of said (A), (B) and (C) components being 100 parts by weight, said copolymer having a number average molecular weight of from about 500 to 1,000,000.
Dependencies are inferred from the claim text.