Anti-reflective coating composition providing improved scratch resistance, anti-reflective film using the same, and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9447288-B2
Application number	US-201214237523-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Sep 29, 2011
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

The present invention relates to an anti-reflective coating composition providing improved scratch resistance, a method for manufacturing an anti-reflective film using the same, and an anti-reflective film manufactured thereby. According to the present invention, provided are a composition that is able to form a coating layer having improved surface scratch resistance, while forming one or more layers by a single coating process, and an anti-reflective film manufactured by using the same.

First claim

The invention claimed is:

1. An anti-reflective coating composition comprising
a (meth)acrylate-based compound;
5 to 50 parts by weight of hollow particles;
1 to 30 parts by weight of a first initiator having a molecular weight of less than 420;
1 to 20 parts by weight of a second initiator having a molecular weight of 420 to 1000; and
100 to 500 parts by weight of a solvent,
based on 100 parts by weight of the (meth)acrylate-based compound.

2. The anti-reflective coating composition according to claim 1 , wherein the (meth)acrylate-based compound includes a multifunctional (meth)acrylate-based compound having 2 to 10 functional groups and a (meth)acrylate-based compound having a fluorine-containing substituent.

3. The anti-reflective coating composition according to claim 2 , wherein the (meth)acrylate-based compound includes the (meth)acrylate-based compound having a fluorine-containing substituent and the multifunctional (meth)acrylate-based compound having 2 to 10 functional groups at a weight ratio of 1:10 to 1:300.

4. The anti-reflective coating composition according to claim 2 , wherein the (meth)acrylate-based compound having a fluorine-containing substituent and the multifunctional (meth)acrylate-based compound have a surface energy difference of 5 mN/m or higher.

5. The anti-reflective coating composition according to claim 2 , wherein the multifunctional (meth)acrylate-based compound is one or more compounds selected from the group consisting of dipentaerythritol hexaacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, trimethylenepropane triacrylate, ethylene glycol diacrylate, 9,9-bis(4-(2-acryloxyethoxy)phenyl)fluorene, and bis(4-methacryloxy thiophenyl)sulfide.

6. The anti-reflective coating composition according to claim 2 , wherein the (meth)acrylate-based compound having a fluorine-containing substituent is one or more selected from the group consisting of compounds of the following Chemical Formulae 1 to 5:

wherein R1 is a hydrogen group or an alkyl group having 1 to 6 carbon atoms, a is an integer of 0 to 7, and b is an integer of 1 to 3;

wherein c is an integer of 1 to 10;

wherein d is an integer of 1 to 11;

wherein e is an integer of 1 to 5;

wherein f is an integer of 4 to 10.

7. The anti-reflective coating composition according to claim 1 , wherein the hollow particles have a number average diameter of 1 to 200 nm.

8. The anti-reflective coating composition according to claim 1 , wherein the hollow particles are hollow silica particles.

9. The anti-reflective coating composition according to claim 1 , wherein the solvent has a dielectric constant (25° C.) of 20 to 30, and a dipole moment of 1.7 to 2.8.

10. The anti-reflective coating composition according to claim 1 , wherein the solvent is one or more selected from the group consisting of methyl ethyl ketone, ethyl acetate, acetyl acetone, isobutyl ketone, methanol, ethanol, n-butanol, i-butanol, and t-butanol.

11. The anti-reflective coating composition according to claim 1 , further comprising inorganic nanoparticles having a number average diameter of 1 to 50 nm.

12. A method for manufacturing an anti-reflective film, comprising the steps of:
preparing the anti-reflective coating composition according to claim 1 ;
applying the composition onto at least one surface of a substrate film;
drying the applied composition; and
curing the dried composition layer.

13. The method for manufacturing an anti-reflective film according to claim 12 , wherein the composition applied onto the substrate film is spontaneously phase-separated into a first layer containing the initiator having the first molecular weight; and a second layer containing the hollow particles and the initiator having the second molecular weight, these layers are formed sequentially from the substrate film.

14. The method for manufacturing an anti-reflective film according to claim 12 , wherein the drying process of the composition is performed at a temperature of 5 to 150° C. for 0.1 to 60 minutes.

15. The method for manufacturing an anti-reflective film according to claim 12 , wherein the curing process of the composition is performed at a UV radiation dose of 0.1 to 2 J/cm2 for 1 to 600 seconds.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Heon
• Kang Joon-Koo
• Chang Yeong-Rae
• Kim Hye-Min

Classifications

• Y10T428/249974

  Metal- or silicon-containing element · CPC title

• Y10T428/24967

  Absolute thicknesses specified · CPC title

• C09D5/006 Primary

  Anti-reflective coatings · 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

• C08K7/26

  Silicon- containing compounds · CPC title