Active energy ray curable aqueous resin composition, active energy ray curable aqueous coating material, and article coated with the coating material

Patent metadata

Field	Value
Publication number	US-9605174-B2
Application number	US-201314356345-A
Country	US
Kind code	B2
Filing date	Jan 10, 2013
Priority date	Jan 17, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

The present invention provides an active energy ray curable aqueous resin composition prepared by reacting an acrylic resin (A), a polyisocyanate compound (B), and (meth)acrylate (C) having a hydroxyl group and dispersing the reaction product in an aqueous medium, the resin (A) being produced by copolymerizing an acrylic monomer (a1) having a polyoxyalkylene group, an acrylic monomer (a2) having a hydroxyl group, and an acrylic monomer (a3) other than the acrylic monomer (a1) and the acrylic monomer (a2) as essential raw materials. The active energy ray curable aqueous resin composition has excellent storage stability and forms a cured coating film with a good appearance and high adhesion to a substrate even after immersion in hot water, and thus can be desirably used for an active energy ray curable aqueous coating material.

First claim

The invention claimed is:

1. An active energy ray curable aqueous resin composition prepared by:
reacting an acrylic resin (A), a polyisocyanate compound (B), and a (meth)acrylate (C) having a hydroxyl group to form an active energy ray curable resin; and
dispersing the active energy ray curable resin in an aqueous medium,
wherein the acrylic resin (A) is produced by copolymerizing an acrylic monomer (a1) having a polyoxyalkylene group, an acrylic monomer (a2) having a hydroxyl group, and an acrylic monomer (a3) other than the acrylic monomer (al)) and the acrylic monomer (a2) as essential raw materials,
a ratio by mass of the acrylic monomer (a1) in the monomer components as the raw materials of the acrylic resin (A) is in a range of 30 to 90% by mass,
a ratio by mass of the acrylic monomer (a2) in the monomer components is in a range of 2 to 30% by mass, and
a mass ratio ((A)/(C)) of the acrylic resin (A) and the (meth)acrylate (C) is in a range of 0.2 to 8.0, and
wherein the active energy ray curable resin is curable by irradiation.

2. The active energy ray curable aqueous resin composition according to claim 1 , wherein the polyoxyalkylene group is a polyoxyethylene group.

3. The active energy ray curable aqueous resin composition according to claim 1 , wherein the polyisocyanate compound (B) is an aliphatic diisocyanate compound or an alicyclic diisocyanate compound.

4. The active energy ray curable aqueous resin composition according to claim 1 , wherein the (meth)acrylate (C) is pentaerythritol triacrylate.

5. The active energy ray curable aqueous resin composition according to Claiml, wherein the acrylic monomer (a3) is an alicyclic acrylic monomer.

6. An active energy ray curable aqueous coating material comprising the active energy ray curable aqueous resin composition according claim 1 .

7. An article coated with the active energy ray curable aqueous coating material according to claim 6 .

8. The active energy ray curable aqueous resin composition according to claim 2 , wherein the polyisocyanate compound (B) is an aliphatic diisocyanate compound or an alicyclic diisocyanate compound.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Miyake Masahiro
• Mukai Takashi

Classifications

• C09D5/02 Primary

  Emulsion paints {including aerosols} · CPC title

• C09D175/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08L75/04

  Polyurethanes · CPC title

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C08G18/673

  containing two or more acrylate or alkylacrylate ester groups · CPC title