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:
Sep. 20, 1994
Filed:
Apr. 22, 1993
Yoshinori Kato, Mie, JP;
Ryutaro Hayashi, Mie, JP;
Takeo Tsukamoto, Mie, JP;
Masahiro Aoki, Mie, JP;
Mitsubishi Yuka Badische Co., Ltd., Yokkaichi, JP;
Abstract
A crosslinking aqueous pigment dispersion is disclosed, comprising (A) an aqueous resin dispersion, (B) a pigment, (C) a carbonyl-containing copolymer resin having an aldo group or a keto group, and (D) a hydrazine derivative having at least two hydrazino groups (--NHNH.sub.2) per molecule, in which said carbonyl-containing copolymer resin (C) is a copolymer resin obtained by copolymerizing a monomer mixture consisting of (a) from 1 to 30% by weight of a carbonyl-containing unsaturated monomer having an aldo group or a keto group, (b) from 10 to 65% by weight of an ethylenically unsaturated carboxylic acid monomer, (c) from 5 to 89% by weight of at least one unsaturated monomer selected from the group consisting of an alkyl acrylate or alkyl methacrylate having from 1 to 10 carbon atoms in the alkyl moiety thereof, an aromatic vinyl monomer, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate, a vinyl halide, a vinylidene halide, butadiene, and ethylene, and (d) not more than 50% by weight of an unsaturated monomer other than the unsaturated monomers (a) to (c), and said carbonyl-containing copolymer resin (C) is present in an amount of from 0.1 to 10% by weight based on said pigment (B) and has been solubilized to a degree of at least 90% by weight by addition of an alkali and/or an organic solvent. The pigment dispersion provides a dry film excellent in gloss, water resistance, alkali resistance and weather resistance.