Coating material composition, and light-diffusing member manufactured using said coating material composition

Patent metadata

Field	Value
Publication number	US-9841540-B2
Application number	US-201415037131-A
Country	US
Kind code	B2
Filing date	Oct 9, 2014
Priority date	Nov 29, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A coating material composition include a hydroxyl group-containing acrylic resin, a fluororesin, and light diffusive particles, and the hydroxyl group-containing acrylic resin has a weight-average molecular weight in a range of 10,000 to 30,000 and a hydroxyl value in a range of 14 to 70, wherein a mass ratio of the fluororesin to the hydroxyl group-containing acrylic resin (the fluororesin/the hydroxyl group-containing acrylic resin) is in a range of 5/95 to 50/50. The coating material composition can provide the light diffusing properties capable of uniformly diffusing light while effectively masking a light source image.

First claim

The invention claimed is:

1. A coating material composition for forming a light diffusing layer comprising a hydroxyl group-containing acrylic resin, a polyfluoroolefin resin, and light diffusive particles, the hydroxyl group-containing acrylic resin having a weight-average molecular weight in a range of 10,000 to 30,000 and a hydroxyl value in a range of 14 to 70,
wherein a mass ratio of the polyfluoroolefin resin to the hydroxyl group-containing acrylic resin is in a range of 5/95 to 50/50.

2. The coating material composition for forming a light diffusing layer according to claim 1 , wherein a refractive index difference between the light diffusive particles and the hydroxyl group-containing acrylic resin is in a range of 0.05 to 0.25, and an average particle size (d 50 ) of the light diffusive particles is in a range of 0.8 μm to 15 μm.

3. A light diffusing member comprising a transparent substrate and a light diffusing layer applied on one surface of the transparent substrate, the light diffusing layer being formed of the coating material composition for forming a light diffusing layer according to claim 1 .

4. The light diffusing member according to claim 3 , wherein a proportion of the polyfluoroolefin resin with respect to the hydroxyl group-containing acrylic resin by mass in the light diffusing layer is larger on a surface side of the light diffusing layer than on a transparent substrate side.

5. The light diffusing member according to claim 3 , wherein an arithmetic mean roughness (Ra) of a surface of the light diffusing layer is in a range of 1 μm to 10 μm.

6. A cover for lighting comprising the light diffusing member according to claim 3 .

7. The coating material composition for forming a light diffusing layer according to claim 1 , wherein the light diffusive particles are contained in an amount from 25 to 150 parts by mass based on 100 parts by mass of the hydroxyl group-containing acrylic resin and the polyfluoroolefin resin combined together.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Uchiyama Shuhei
• Sako Toshiharu

Classifications

• C08J7/0427

  with only one layer of a composition containing a polymer binder (with more layers C08J7/042) · CPC title

• C09D133/066

  containing -OH groups · CPC title

• C09D7/69

  Particle size larger than 1000 nm · CPC title

• C09D7/65

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C08J2427/12

  containing fluorine atoms · CPC title