Coating composition

Patent metadata

Field	Value
Publication number	US-9873799-B2
Application number	US-201414780693-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Mar 29, 2013
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

Coating composition containing (A) an acrylate component and (B) zirconia, wherein a mass ratio (B)/(A) of (B) to (A) is from 0.1 to 2.0, (A) contains components (a-1), (a-2) and (a-3), and a content ratio X of component (a-1), a content ratio Y of component (a-2) and content ratio Z of component (a-3) satisfies conditions (1) and (2), and optical member having hard coat film obtained by using coating composition.

First claim

The invention claimed is:

1. A coating composition comprising (A) an acrylate component and (B) zirconia, wherein a mass ratio (B)/(A) of (B) the zirconia to (A) the acrylate component is from 0.1 to 2.0, (A) the acrylate component comprises the following components (a-1), (a-2) and (a-3), wherein X represents a content ratio of the component (a-1), Y represents a content ratio of the component (a-2) and Z represents a content ratio of the component (a-3):
(a-1): a polyfunctional acrylate compound having 3 or more acrylate groups in one molecule;
(a-2): a dendritic aliphatic compound having an acrylate group at an end thereof; and
(a-3): at least one acrylate compound represented by the following formula (I):

wherein in the formula (I), R 1 , R 2 and R 3 each independently represent an alkylene group having from 1 to 6 carbon atoms; R 4 and R 5 each independently represent a hydrogen atom or a methyl group; and Q represents a hydrogen atom or a (meth)acryloyl group, provided that the component (a-3) contains at least one of said acrylate compounds wherein Q represents a hydrogen atom,
the content of X is from 40 to 60% by mass, and the total content of Y and Z is from 60 to 40% by mass, based on 100% by mass of (A), and
the content of Z is 20 to 90% by mass, based on the total content of Y and Z.

2. The coating composition according to claim 1 , wherein component (a-1) contains a linear acrylate compound having 3 or more acrylate groups in one molecule and having a hydroxyl group.

3. The coating composition according to claim 1 , wherein the content of Z is from 20 to 85% by mass, based on the total content of Y and Z.

4. An optical member comprising a hard coat film that is formed with the coating composition according to claim 1 .

5. The optical member according to claim 4 , wherein the optical member further comprises an antireflection film composed of an inorganic material on the hard coat film.

6. The coating composition according to claim 1 , wherein the mass ratio (B)/(A) is from 0.3 to 1.8.

7. The coating composition according to claim 1 , wherein the mass ratio (B)/(A) is from 0.9 to 1.6.

8. The coating composition according to claim 1 , wherein component (a-1) contains a mixture of (1) a polyfunctional acrylate compound having 3 or more acrylate groups in one molecule and having a hydroxyl group and (2) a polyfunctional acrylate compound having 3 or more acrylate groups in one molecule and having no hydroxyl group, obtained by replacing the hydroxyl group of (1) with an acrylate group.

Assignees

• Hoya Corp

Inventors

• Hamakubo Katsushi
• Ito Kae

Classifications

• C08F222/103

  of trialcohols, e.g. trimethylolpropane tri(meth)acrylate · CPC title

• C08F222/104

  of tetraalcohols, e.g. pentaerythritol tetra(meth)acrylate · CPC title

• C09D133/00

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers · CPC title

• C08K3/22

  of metals · CPC title

• C08K9/06

  with silicon-containing compounds · CPC title