Urethane resin composition, coating agent, and article

Patent metadata

Field	Value
Publication number	US-9969915-B2
Application number	US-201414781010-A
Country	US
Kind code	B2
Filing date	Feb 25, 2014
Priority date	Mar 29, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The present invention provides a urethane resin composition containing a urethane resin having polymerizable unsaturated groups and an aqueous medium. The urethane resin is obtained by reacting a polyol with a polyisocyanate. The polyol contains an alkylenediol having two or more polymerizable unsaturated groups or an oxyalkylenediol having two or more polymerizable unsaturated groups. The alkylenediol is represented by general formula (1):

HO—R 1 —OH  (1)

(where R 1 is a linear alkylene group of one to nine carbon atoms having two or more atomic groups containing a polymerizable unsaturated group in side chains thereof). The oxyalkylenediol (a1-2) is represented by general formula (2):

HO—R 1 O—R 2 —OR 3 —OH  (2)

(where R 1 and R 3 are ethylene groups having a total of two or more atomic groups containing a polymerizable unsaturated group in side chains thereof, and R 2 is an alkylene group of one to five carbon atoms). This urethane resin composition can form a coating with good elongation and flexibility and high hardness.

First claim

The invention claimed is:

1. A urethane resin composition comprising a urethane resin (A) having polymerizable unsaturated groups and an aqueous medium (B), the urethane resin (A) being obtained by reacting a polyol (a1) with a polyisocyanate (a2), the polyol (a1) comprising an oxyalkylenediol (a1-2) having two or more polymerizable unsaturated groups, the oxyalkylenediol (a1-2) being represented by general formula (2):
[Chem. 2]
HO—R 1 O—R 2 —OR 3 —OH  (2)

(wherein R 1 and R 3 are ethylene groups having atomic groups comprising a polymerizable unsaturated group in side chains thereof, and R 2 is an alkylene group of one to five carbon atoms).

2. The urethane resin composition according to claim 1 , wherein the oxyalkylenediol (a1-2) is present in a total amount of 0.1% to 49% of the total mass of the ingredients used to produce the urethane resin (A).

3. The urethane resin composition according to claim 1 , wherein the polyol (a1) further comprises a polyester polyol, a polyether polyol, or a polycarbonate polyol.

4. A coating agent comprising the urethane resin composition according to claim 1 .

5. An article coated with the coating agent according to claim 1 .

Assignees

• Dainippon Ink & Chemicals

Inventors

• Miyake Junichi
• KANNARI Hiroyoshi
• Shirakami Jun

Classifications

• C09D5/02

  Emulsion paints {including aerosols} · CPC title

• C08G18/44

  Polycarbonates · CPC title

• C08G18/67

  Unsaturated compounds having active hydrogen · CPC title

• C09D175/06

  from polyesters · CPC title

• C08G18/672 Primary

  Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen · CPC title