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Hard coating film

A hard coating film and hard coating technology, applied in coatings, cyclodextrin coatings, polyurea/polyurethane coatings, etc., can solve coatings that do not have mechanical properties, chemical resistance and abrasion resistance, scratches or external damage Insufficient self-healing ability, limited problems, etc., to achieve the effect of high elasticity or elastic recovery, excellent self-healing ability, and excellent mechanical properties

Active Publication Date: 2014-09-24
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, coatings using previously known polyrotaxane compounds do not have sufficient mechanical properties (such as scratch resistance, chemical resistance, and abrasion resistance) required for coatings, or do not have sufficient resistance to scratches or external damage. Self-healing capability, thus limited in commercialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] (1) Preparation of photocurable coating composition

[0120]100 parts by weight of the polyrotaxane obtained in Synthesis Example 1, 100 parts by weight of dipentaerythritol hexaacrylate, 50 parts by weight of pentaerythritol hexaacrylate, 50 parts by weight of UA-200PA (polyfunctional urethane acrylic acid ester, Shin-Nakamura Chemical Co., Ltd.) and 10 parts by weight of photoinitiator Irgacure-184 are mixed with a mixed solvent consisting of methyl ethyl ketone, ethyl acetate and butyl acetate, and the solid content is 50%, to A photocurable coating composition (E1) was prepared.

[0121] (2) Preparation of hard coating film

[0122] The resulting photocurable coating composition was coated on a TAC film (40 μm in thickness) with a wire bar (No. 8). The coated product was dried at 90°C for 2 minutes, followed by drying at 200mJ / cm 2 Under UV irradiation for 5 seconds to cure. The cured product was heated in an oven at 130° C. to prepare a hard coat film having a ...

Embodiment 2

[0124] (1) Preparation of photocurable coating composition

[0125] A photocurable coating composition (E2) was prepared by the same method as in Example 1 except that the polyrotaxane obtained in Synthesis Example 2 was used.

[0126] (2) Preparation of hard coating film

[0127] A hard coat film was prepared by the same method as in Example 1 except that the photocurable coating composition (E2) was used.

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Abstract

The present invention relates to a hard coating film including a hard coating layer comprising: a crosslinked product of (a) a polyrotaxane compound including a macrocycle to which a lactone-based compound is bonded, wherein a (meth)acrylate-based compound is introduced at the end of the lactone-based compound at a ratio of 40 mol % to 70 mol %, a linear molecule penetrating the macrocycle, and blocking groups arranged at both ends of the linear molecule and preventing the macrocycle from escaping; and (b) a binder resin.

Description

technical field [0001] The present invention relates to self-healing hard coating films, and more specifically, to hard coating films having both self-healing ability and excellent mechanical properties (such as high scratch resistance, high chemical resistance, high abrasion resistance, etc.), The hard coat film has high strength and can minimize curling of the film. Background technique [0002] Recently, with the development of mobile devices such as smartphones, tablets, etc., thinning and lightening of display substrates are required. As display windows or front windows of mobile devices, glass or tempered glass with excellent mechanical properties is usually used. However, glass leads to heavy weight of mobile devices due to its high specific gravity, and can be damaged by external impact. [0003] Therefore, plastic resins are being studied as a material to replace glass. Plastic resins fit in with the trend for lighter mobile devices because they are light and not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/04C08B37/16C08L83/04C08J7/043C08J7/046
CPCC08G18/8116C08B37/0015C09D105/16C08G18/4277C09D175/16C09D175/04C08J7/047C09D175/14C08J2333/12C08B37/0012C08G18/71C08L83/04C08G83/007C09D183/04Y10T428/25Y10T428/31855Y10T428/31786C08J7/0427C08J7/043C08J7/046C09D133/04C08G63/08
Inventor 郑顺和金宪张影来金惠珉
Owner LG CHEM LTD
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