Composition for making hard coating layer

Patent metadata

Field	Value
Publication number	US-2016046830-A1
Application number	US-201514824823-A
Country	US
Kind code	A1
Filing date	Aug 12, 2015
Priority date	Aug 13, 2014
Publication date	Feb 18, 2016
Grant date	—

Abstract

The present invention relates to a composition for forming a hard coating layer, which may form a hard coating layer having significantly improved hardness as well as excellent flexibility such that curling is minimized.

First claim

What is claimed is:

1 . A composition for forming a hard coating layer, comprising:
a first silsesquioxane resin and a second silsesquioxane resin, which have a weight average molecular weight of 500 or more but less than 30,000 and are substituted with a substituent of a (meth)acrylate group, a vinyl group or an epoxy group, the substituent having an equivalent ratio of 50% or more, wherein a hydrodynamic radius ratio of the first silsesquioxane resin to the second silsesquioxane resin represented by the following Equation 1 is more than 1.00 but 3.00 or less:
Hydrodynamic radius of second silsesquioxane resin/hydrodynamic radius of first silsesquioxane resin  [Equation 1]

2 . The composition of claim 1 , wherein the hydrodynamic radius ratio of the first silsesquioxane resin to the second silsesquioxane resin is more than 1.00 but 2.00 or less.

3 . The composition of claim 1 , wherein the equivalent ratio of the substituent of the first silsesquioxane resin and second silsesquioxane resin is 80% or more, and the hydrodynamic radius ratio of the first silsesquioxane resin to the second silsesquioxane resin is more than 1.00 but 1.50 or less.

4 . The composition of claim 1 , wherein the first silsesquioxane resin and the second silsesquioxane resin are included at a weight ratio in a range of 1:9 to 9:1.

5 . The composition of claim 1 , wherein the first silsesquioxane resin and the second silsesquioxane resin are included at a weight ratio in a range of 3:7 to 7:3.

6 . The composition of claim 1 , wherein a total content of the first silsesquioxane resin and the second silsesquioxane resin is 10 to 90 wt % based on a total weight of the composition.

7 . The composition of claim 1 , further comprising an oligomer having a functional group which is crosslinkable with the first silsesquioxane resin and the second silsesquioxane resin.

8 . The composition of claim 7 , wherein the oligomer is a (meth)acrylate oligomer, a vinyl oligomer or an epoxy oligomer.

9 . The composition of claim 1 , further comprising a reactive monomer having a functional group which is crosslinkable with the first silsesquioxane resin and the second silsesquioxane resin.

10 . The composition of claim 9 , wherein the reactive monomer is a (meth)acrylate monomer, a vinyl monomer or an epoxy monomer.

11 . The composition of claim 1 , further comprising an inorganic filler.

12 . The composition of claim 1 , further comprising at least one type selected from the group consisting of a photo-radical polymerization initiator, a photo-cationic polymerization initiator and a thermal polymerization initiator.

13 . A hard coating film, comprising a base material of which at least one surface has a hard coating layer formed of the composition of any one of claims 1 to 12 .

14 . The film of claim 13 , wherein the base material is made from least one resin selected from the group consisting of a polyester-based resin, a cellulose-based resin, a polycarbonate-based resin, an acrylic resin, a styrene-based resin, a polyolefin-based resin, a polyimide-based resin, a polyether sulfone-based resin and a sulfone-based resin.

15 . The film of claim 13 , wherein one surface of the base material has the hard coating layer, and another surface of the base material has an anti-curl back coating layer.

16 . The film of claim 15 , wherein a crack-preventing layer is further formed on the anti-curl back coating layer.

17 . The film of claim 13 , wherein the hard coating film is a window cover at an outermost surface of a display panel.

18 . An image display device, comprising the hard coating film of claim 17 .

Assignees

• Sk Innovation Co Ltd

Inventors

• Kim Won-Yeob
• Moon Chul-Soon
• Kim Hye-Jin
• Yoon Ho-Chul
• Lee Jae-Eun
• Ahn Jong-Nam
• Park Young-June

Classifications

• C08J7/0427

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

• C08J2483/04

  Polysiloxanes · CPC title

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title

• C08G77/045

  containing less than 25 silicon atoms · CPC title

• C08J2367/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title