Coating composition

Patent metadata

Field	Value
Publication number	US-9783683-B2
Application number	US-201414780757-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Mar 29, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A coating composition contains (A) an acrylate component and (B) a metal oxide. A mass ratio (B)/(A) is from 0.6 to 1.3, (A) contains the components (a-1), (a-2) and (a-3), and a content ratio X of (a-1), a content ratio Y of (a-2) and a content ratio Z of (a-3) satisfies the conditions (1) and (2): (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): a modified acrylate compound having been modified with an alkylene oxide or ε-caprolactone. The condition (1): in (A), X is from 40 to 60% by mass, and a total of Y and Z is from 60 to 40% by mass, and the condition (2): in the total of Y and Z, Z is 30% by mass or more and less than 100% by mass.

First claim

The invention claimed is:

1. A coating composition comprising (A) an acrylate component and (B) a metal oxide, wherein a mass ratio (B)/(A) of (B) the metal oxide to (A) the acrylate component is from 0.6 to 1.3, (A) the acrylate component comprises the following components (a-1), (a-2) and (a-3), and a content ratio X of the component (a-1), a content ratio Y of the component (a-2) and a content ratio Z of the component (a-3) satisfies the following conditions (1) and (2):
(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): a modified acrylate compound having been modified with an alkylene oxide or ε-caprolactone,
the condition (1): in (A) the acrylate component, X is from 40 to 60% by mass, and a total of Y and Z is from 60 to 40% by mass, and
the condition (2): in the total of Y and Z, Z is 30% by mass or more and less than 100% by mass.

2. The coating composition according to claim 1 , wherein the component (a-3) is a modified acrylate compound that is pentaerythritol or dipentaerythritol having been modified with an alkylene oxide or ε-caprolactone.

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

4. The coating composition according to claim 1 , wherein the following condition (2-1) is satisfied:
the condition (2-1): in the total of Y and Z, Z is from 30 to 90% by mass.

5. The coating composition according to claim 1 , wherein (B) the metal oxide is silicon oxide.

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

7. The optical member according to claim 6 , wherein the optical member further comprises an antireflection film composed of an inorganic material on the hard coat film.

8. The coating composition according to claim 1 , wherein (a-3) the modified acrylate compound having been modified with an alkylene oxide has 3 or more of the number of acrylate groups in one molecule.

9. An optical member comprising a hard coat film that is formed with the coating composition according to claim 8 .

10. The optical member according to claim 6 , wherein the optical member is a spectacle lens.

Assignees

• Hoya Corp

Inventors

• Hamakubo Katsushi
• Ito Kae

Classifications

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• G02C7/02

  Lenses; Lens systems {; Methods of designing lenses} · CPC title

• C08F220/10

  Esters · CPC title

• C09D4/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C08F222/10

  Esters · CPC title