Coating composition having smooth texture for one-coat-one bake coating

Patent metadata

Field	Value
Publication number	US-9920158-B2
Application number	US-201514933569-A
Country	US
Kind code	B2
Filing date	Nov 5, 2015
Priority date	Dec 12, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A coating composition for one-coat-one bake coating includes a resin, a pigment, a solvent, and a general additive. The resin is an acryl modified urethane resin manufactured by polymerizing polycarbonate diol, polyester diol, an acryl resin, and an isocyanate monomer. The coating composition using one-coat-one bake coating can provide soft texture, excellent chemical resistance, and adhesion.

First claim

What is claimed is:

1. A coating composition for one-coat-one bake coating, the coating composition comprising: a resin; a pigment; a solvent; and a general additive,
wherein the resin is an acryl modified urethane resin manufactured by polymerizing polycarbonate diol, polyester diol, an acryl resin, and an isocyanate monomer,
wherein the acryl modified urethane resin is manufactured by polymerizing, a resin, which contains 30 to 60 wt % of polycarbonate diol, 20 to 40% of polyester diol, and 10 to 30 wt % of an acryl resin based on a total weight of the acryl modified urethane resin, and an amount of the isocyanate monomer to provide a molar ratio of [NCO]/[OH] 1 to 1.2
wherein the acryl resin has a weight average molecular weight of 20,000 to 40,000 and a hydroxyl group content of 0.5 to 3.0%.

2. The coating composition of claim 1 , wherein the coating composition contains 30 to 70 wt % of the acryl modified urethane resin, 5 to 30 wt % of the pigment, 20 to 50 wt % of the solvent, and 0.1 to 10 wt % of the general additive based on a total weight of the coating composition.

3. The coating composition of claim 1 , wherein the acryl modified urethane resin has a weight average molecular weight of 30,000 to 50,000 and a hydroxyl group content of 0 to 2 mol %.

4. The coating composition of claim 1 , wherein the polycarbonate diol has a weight average molecular weight of 500 to 5,000 and a hydroxyl group content of 0.7 to 7%.

5. The coating composition of claim 1 , the polyester diol has a weight average molecular weight of 500 to 5,000 and a hydroxyl group content of 0.7 to 7%.

6. The coating composition of claim 1 , wherein the isocyanate monomer is at least one selected from the group consisting of toluene diisocyanate, 4,4-diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane diisocyanate.

7. The composition of claim 1 , wherein the general additive is at least one selected from the group consisting of a UV stabilizing agent, a slip agent, a catalyst, and a silver adhesion promoter.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Noroo Bee Chemical Co Ltd

Inventors

• Noh Eun Ju
• Jung Woo Chul
• Lee Min Hee
• Lee Yong Chul
• Oh Dea Geun
• Kim Young Seok
• Jung Ji Yeon
• Ahn Jae Beom

Classifications

• C08G18/4063

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

• C08G18/758

  containing two or more cycloaliphatic rings · CPC title

• C08G18/44

  Polycarbonates · CPC title

• C08G18/73

  acyclic · CPC title

• C08G18/6216 Primary

  Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof · CPC title