Coating material for formation of matte hard coat, and decorative sheet using same

Patent metadata

Field	Value
Publication number	US-2019382613-A1
Application number	US-201716464068-A
Country	US
Kind code	A1
Filing date	Nov 14, 2017
Priority date	Nov 25, 2016
Publication date	Dec 19, 2019
Grant date	—

Abstract

Embodiments provide a coating material containing: (A) 100 parts by mass of an acrylic curable resin; (B) 5-200 parts by mass of aluminum oxide particles having an average particle size of 1-100 μm; (C) 0.1-20 parts by mass of aluminum oxide fine particles having an average particle size of 1-100 nm; and (D) 1-100 parts by mass of a compound having two or more isocyanate groups per molecule. In one embodiment, the acrylic curable resin (A) includes: (a1) a structural unit derived from a hydroxy group-containing (meth)acrylic acid ester; (a2) a structural unit derived from a vinyl aromatic compound; and (a3) a structural unit derived from a (meth)acrylic acid alkyl ester. In one embodiment, the acrylic curable resin (A) may contain, in addition to the structural units (a1) and (a2): (a3-1) a structural unit derived from methyl methacrylate; and (a3-2) a structural unit derived from an aliphatic (including alicyclic) alkyl ester having 4 or more carbon atoms of a (meth)acrylic acid.

First claim

1 . A coating material comprising:
(A) 100 parts by mass of an acrylic curable resin; (B) 5-250 parts by mass of aluminum oxide particles having an average particle diameter of 1-100 μm; (C) 0.1-20 parts by mass of aluminum oxide fine particles having an average particle diameter of 1-100 nm; and (D) 1-100 parts by mass of a compound having two or more isocyanate groups per molecule, wherein the acrylic curable resin (A) comprises:
(a1) a structural unit derived from a hydroxyl group-containing (meth)acrylic acid ester;
(a2) a structural unit derived from a vinyl aromatic compound; and
(a3) a structural unit derived from a (meth)acrylic acid alkyl ester.

2 . The coating material according to claim 1 , wherein the acrylic curable resin (A) comprises the structural unit derived from a hydroxyl group-containing (meth)acrylic acid ester (a1) in an amount of 5 to 40 mol %, with respect to 100 mol % of the total sum of structural units derived from all constituent monomers.

3 . The coating material according to claim 1 or 2 , wherein the acrylic curable resin (A) comprises the structural unit derived from a vinyl aromatic compound (a2) in an amount of 10 to 50 mol %, with respect to 100 mol % of the total sum of structural units derived from all constituent monomers.

4 . The coating material according to claim 1 , wherein the acrylic curable resin (A) comprises the structural unit derived from a (meth)acrylic acid alkyl ester (a3) in an amount of 20 to 85 mol %, with respect to 100 mol % of the total sum of structural units derived from all constituent monomers.

5 . The coating material according to claim 1 , wherein the acrylic curable resin (A) comprises:
(a1) a structural unit derived from a hydroxyl group-containing (meth)acrylic acid ester; (a2) a structural unit derived from a vinyl aromatic compound; (a3-1) a structural unit derived from methyl methacrylate; and (a3-2) a structural unit derived from an aliphatic alkyl ester having 4 or more carbon atoms of a (meth)acrylic acid.

6 . The coating material according to claim 5 , wherein the acrylic curable resin (A) comprises the structural unit derived from methyl methacrylate (a3-1) in an amount of 10 to 50 mol %, with respect to 100 mol % of the total sum of structural units derived from all constituent monomers.

7 . The coating material according to claim 5 , wherein the acrylic curable resin (A) comprises the structural unit derived from an aliphatic alkyl ester having 4 or more carbon atoms of a (meth)acrylic acid (a3-2) in an amount of 5 to 40 mol %, with respect to 100 mol % of the total sum of structural units derived from all constituent monomers.

8 . An article comprising a hard coat formed from the coating material according to claim 1 .

9 . A decorative sheet comprising a hard coat formed from the coating material according to claim 1 .

10 . An article comprising the decorative sheet according to claim 9 .

Assignees

• Riken Technos Corp

Inventors

• Ito Shigekazu
• Inagaki Koji

Classifications

• C09D133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08K2201/005

  Additives being defined by their particle size in general · CPC title

• C09D7/62

  modified by treatment with other compounds · CPC title

• C09D7/67

  Particle size smaller than 100 nm · CPC title