Curable composition, laminate, and automobile headlamp lens

Patent metadata

Field	Value
Publication number	US-11021618-B2
Application number	US-201515300361-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Mar 31, 2014
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Provided are: a curable composition that makes it possible to form a cured film having excellent wear resistance and weather resistance; a laminate that is provided with the cured film; and an automobile headlamp lens. The curable composition makes it possible to obtain a cured film in which the relationship between a haze value (ΔHx) that is obtained by a wear resistance test and a haze value (ΔHy) that is obtained by a weather resistance test satisfies ΔHy≤−0.3 ΔHx+5.0 when a cured film having a thickness of 10 μm is produced.

First claim

The invention claimed is:

1. A curable composition, comprising:
(A) surface-modified silica particles obtained by reacting 5 to 20 parts by mass of a compound (a-2) of Formula (1) with 100 parts by mass of silica particles (a-1) having an average primary particle diameter of 500 am or less, the average primary particle diameter being calculated from a specific surface area measured by a BET adsorption method defined in JIS Z8830:
R 1 l —SiR 2 m R 3 n   (1),

where R 1 represents a functional group containing a (meth)acryloyl group, R 2 represents a hydrolyzable functional group or a hydroxyl group, R 3 represents a substituent other than R 1 and R 2 , l is an integer of 1 to 3, m is an integer of 1 to 3, and n is an integer of 0 to 2, provided that l+m+n=4;
(B) a compound that is at least one selected from the group consisting of tris(2-(meth)acryloxyethyl) isocyanurate; caprolactone-modified dipentaerythritol hexa(meth)acrylate, which is a (meth)acrylation product of an adduct of dipentaerythritol and ε-caprolactone; caprolactone-modified dipentaerythritol hydroxy penta(meth)acrylate; ditrimethylol propane tetra(meth)acrylate; an epoxy poly(meth)acrylate; and a urethane poly(meth)acrylate;
(C) a compound of the Formula (1) and/or a condensate thereof;
(D) a photopolymerization initiator; and
(E) an ultraviolet absorbing agent that is at least one compound derived from benzophenone, benzotriazole, and hydroxyphenyltriazine,
wherein
a content of (A) is 10 to 35% by mass with respect to 100% by mass of (A) to (C) in total,
a content of (B) is 65 to 90% by mass with respect to 100% by mass of (A) to (C) in total,
a content of (C) is 0 to 0.08 times in mass of content of (A),
a content of (D) is 0.01 to 10 parts by mass with respect to 100 parts by mass of (A) to (C) in total, and
a content of (E) is 1 to 5 parts by mass with respect to 100 parts by mass of (A) to (C) in total.

2. The curable composition according to claim 1 , further comprising a light stabilizer (F),
wherein a content of (F) is 0.01 to 3 parts by mass with respect to 100 parts by mass of (A) to (C) in total.

3. A laminate, comprising
a cured film of the curable composition according to claim 1 on a substrate.

4. The laminate according to claim 3 , wherein a thickness of the cured film is 5 to 20 μm.

5. An automobile headlamp lens, comprising
a cured film of the curable composition according to claim 1 on a surface of a resin molded article.

6. The automobile headlamp lens according to claim 5 , wherein a thickness of the cured film is 5 to 20 μm.

7. The automobile headlamp lens according to claim 5 , wherein the resin molded article is a polycarbonate resin molded article.

8. The curable composition according to claim 1 , wherein the curable composition does not contain urethane poly(meth)acrylate.

Assignees

• Mitsubishi Chem Corp

Inventors

• Ito Jun
• Serizawa Masashi
• Satou Hiroyuki
• Miyachi Akira
• Kanbara Riina

Classifications

• G02B1/18

  Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films (G02B1/16 takes precedence) · CPC title

• G02B1/111

  using layers comprising organic materials · CPC title

• C09D4/00

  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

• G02B27/0006

  with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B) · CPC title

• C08F290/00

  Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups · CPC title