Composition for making hard coating layer

Patent metadata

Field	Value
Publication number	US-9676960-B2
Application number	US-201514824823-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 13, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

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 is from 1.01 to 2.90, and wherein the first and second silsesquioxane resins are included at a weight ratio in a range of from 1:9 to 9:1, and
wherein the first and second silsesquioxane resins are selected from the group consisting of complete-cage type resins, incomplete-cage type resins, ladder type resins, random type resins and mixtures thereof, provided that the first and second silsesquioxane resins are not both complete-cage type resins.

2. The composition of claim 1 , wherein the hydrodynamic radius ratio of the first silsesquioxane resin to the second silsesquioxane resin is from 1.01 to 2.00.

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 from 1.01 to 1.50.

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 3:7 to 7:3.

5. 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.

6. 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.

7. The composition of claim 6 , wherein the oligomer is a (meth)acrylate oligomer, a vinyl oligomer or an epoxy oligomer.

8. 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.

9. The composition of claim 8 , wherein the reactive monomer is a (meth)acrylate monomer, a vinyl monomer or an epoxy monomer.

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

11. 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.

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

13. The film of claim 12 , 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.

14. The film of claim 12 , 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.

15. The film of claim 14 , wherein a crack-preventing layer is further formed on the anti-curl back coating layer.

16. The film of claim 12 , wherein the hard coating film is a window cover at an outermost surface of a display panel.

17. An image display device, comprising the hard coating film of claim 16 .

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 Youngjune

Classifications

• C08J7/0427

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

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title

• C08J2367/02

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

• C09D183/04

  Polysiloxanes · CPC title

• C09D183/06

  containing silicon bound to oxygen-containing groups (C09D183/12 takes precedence) · CPC title