Block polyisocyanate compound

Patent metadata

Field	Value
Publication number	US-10047189-B2
Application number	US-201214110168-A
Country	US
Kind code	B2
Filing date	Apr 5, 2012
Priority date	Apr 8, 2011
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

It is an object of the invention to provide a block polyisocyanate compound with excellent storage stability. The block polyisocyanate compound of the invention has the following construction. A block polyisocyanate compound having at least one block isocyanate group selected from the group consisting of a block isocyanate group represented by formula (I), block isocyanate group represented by formula (II) and block isocyanate group represented by formula (III), and a hydrophilic group.

First claim

The invention claimed is:

1. An aqueous coating composition comprising: a block polyisocyanate compound having a hydrophilic group and at least one block isocyanate group; and a hydroxyl-containing resin (A);
wherein the block isocyanate group in the block polyisocyanate compound is selected from the group consisting of:
a block isocyanate group represented by the following formula (I):

wherein R 1 is an isopropyl group,
R 2 , R 4 and R 5 each independently represent a C1-12 hydrocarbon group and
R 3 represents a C1-12 straight or branched alkylene group; and

a block isocyanate group represented by the following formula (II):

wherein R 2 , R 3 , R 4 and R 5 are as defined above;

wherein the hydrophilic group in the block polyisocyanate compound comprises at least one polyoxyalkylene group selected from a polyoxyethylene group and a polyoxyethyleneoxypropylene group, and
wherein the hydroxyl-containing resin (A) includes a hydroxyl-containing acrylic resin (A 1 ) and a hydroxyl-containing polyester resin (A 2 ), and wherein the hydroxyl-containing acrylic resin (A 1 ) comprises a core-shell-type water-dispersible hydroxyl-containing acrylic resin (A 111 ).

2. The aqueous coating composition according to claim 1 , wherein the core-shell type water-dispersible hydroxyl-containing acrylic resin (A 111 ) has a hydroxyl value in the range of about 1 to about 200 mgKOH/g.

3. The aqueous coating composition according to claim 1 , wherein the core-shell type water-dispersible hydroxyl-containing acrylic resin (A 111 ) comprises a copolymer as the core section whose copolymerizing components are a polymerizable unsaturated monomer having two or more polymerizable unsaturated groups in the molecule and a polymerizable unsaturated monomer having one polymerizable unsaturated group in the molecule.

4. A coated article with a coating film, obtained by coating an article with the aqueous coating composition according to claim 1 .

Assignees

• Kobata Masami
• Kitagawa Hiroshi
• Kitazono Kazuaki
• Kansai Paint Co Ltd

Inventors

• Kobata Masami
• Kitagawa Hiroshi
• Kitazono Kazuaki

Classifications

• C08L2201/54

  Aqueous solutions or dispersions · CPC title

• C08G18/6254

  Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• C08G18/4063

  Mixtures of compounds of group C08G18/62 with other macromolecular compounds · CPC title

• C08G18/4833 Primary

  Polyethers containing oxyethylene units · CPC title