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A coating composition and a polarizer

A technology of coating composition and copolymer, which is applied in the field of polarizers, can solve the problems of low adhesion and easy falling off of polyvinyl alcohol layer, and achieve the effect of good adhesion, not easy falling off, and reduced thickness

Active Publication Date: 2022-01-25
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the hardened coating in the existing polarizer has low adhesion to the polyvinyl alcohol layer and is easy to fall off, the invention provides a coating composition and a polarizer

Method used

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  • A coating composition and a polarizer
  • A coating composition and a polarizer
  • A coating composition and a polarizer

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation method of the coating composition provided by the present invention: mix and stir acrylate copolymer, epoxy resin polyol, isocyanate oligomer and diluent according to a certain ratio for 10 minutes, then add organic particles and photoinitiator according to the corresponding proportion Stir for 30 minutes to mix evenly, then add diluent to adjust the viscosity to 13-18s, stir evenly, and after filtering, the coating composition can be coated on the polyvinyl alcohol layer.

[0039] Further, the viscosity of the coating composition is measured using a Tu-4 cup.

[0040] The method for applying the coating composition provided by the invention to the protective layer of a polarizer adopts a micro-grain anilox roller coating method, uniformly coats the uniformly mixed coating composition on the polyvinyl alcohol layer, and bakes it at 100°C Bake for 1-2 minutes, then cure the coating with UV lamp, the UV lamp capacity is 200-400mj / cm 2 , After curing and m...

Embodiment 1

[0048] The invention provides a coating composition and a polarizer.

[0049] The coating composition comprises: 25% of hydroxyl acrylate copolymer, 20% of epoxy resin polyol, 5% of hexamethylene diisocyanate derivative, 0.1% of photoinitiator, 2% of adhesion promoter, organic particle 0.30%, diluent 50%; Said percentage content is weight percentage content. The total amount of the hydroxyacrylate copolymer, epoxy resin polyol, hexamethylene diisocyanate derivative and diluent is 100%, and the percentage of the photoinitiator, adhesion promoter, organic microparticles is Based on the percentage of hydroxyacrylate copolymer. The photoinitiator is TPO, the organic particles are polymethyl methacrylate particles, and the particle size distribution is 5-8 μm; the diluent is a combination of ethyl acetate and butyl acetate, ethyl acetate and acetic acid The weight ratio of butyl ester is 1:1.

[0050] The polarizer includes an anti-scratch coating, a polyvinyl alcohol layer, a c...

Embodiment 2

[0053] As the coating composition and polarizer provided in Example 1, the coating composition includes: 25% of hydroxyl acrylate copolymer, 22% of epoxy resin polyol, 5% of hexamethylene diisocyanate derivative, optical Initiator 0.1%, adhesion promoter 2%, organic particles 0.30%, diluent 48%. The photoinitiator is TPO, the organic particles are polymethyl methacrylate particles, and the particle size distribution is 5-8 μm; the diluent is ethyl acetate and butyl acetate, and the weight ratio is 1:1.

[0054] Mix the coating composition uniformly in proportion, and then apply the uniformly mixed coating composition on the polyvinyl alcohol layer by using a micro-gravure roller coating method, and bake at 100°C for 1-2min , and then the coating and the polyvinyl alcohol layer are cured by a UV lamp. After curing, bake at 60°C for 24 hours to obtain a coating with high adhesion and high scratch resistance, and the coating thickness is 6 μm.

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Abstract

The invention relates to the field of production of liquid crystal display polarizers, in particular to a coating composition and a polarizer. In order to solve the problems of low adhesion and easy peeling off of the hardened coating to the polyvinyl alcohol layer in the existing polarizer, the invention provides a coating composition and a polarizer. The coating composition comprises 20-30% of acrylate copolymer, 20-30% of epoxy resin polyol, 0.01%-0.15% of photoinitiator, 1.5-2.5% of adhesion promoter, 2-2% of polyisocyanate monomer 5%, organic microparticles 0.1%-0.5%, diluent 38%-58%, and described percentage is percentage by weight; The total amount of described acrylate copolymer, epoxy resin polyol, polyisocyanate monomer and diluent is 100%; the percentage content of the photoinitiator, adhesion promoter, and organic microparticles is based on the percentage content of the acrylate copolymer. The coating formed by the coating composition provided by the invention has good adhesion performance and is not easy to fall off, so that the thickness of the polarizer is thin and the service life of the polarizer is long.

Description

technical field [0001] The invention relates to the field of production of liquid crystal display polarizers, in particular to a coating composition and a polarizer. Background technique [0002] With the continuous development of liquid crystal display technology, the application of liquid crystal display is more and more extensive, and the products cover TV, computer, navigator, automobile, mobile phone and other fields. At the same time, people have higher and higher requirements for thinner and higher performance of mobile display products. As an important part of liquid crystal modules, the development and improvement of polarizers in liquid crystal displays is becoming more and more important. The general structural composition of the polarizer is that the middle layer is a polyvinyl alcohol layer, and the upper and lower layers of the polyvinyl alcohol layer are triacetate cellulose layers. The polyvinyl alcohol layer mainly plays the role of polarized light, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D163/00C09D175/04C09D7/65C09J7/29C09J7/24G02B1/14
CPCC09D133/066C09D163/00C09D7/65C09J7/29G02B1/14C09J2203/318C09J2401/006C09J2429/006C08L2201/08C08L63/00C08L75/04C08L33/12C08L33/066
Inventor 于振江李刚余洋叶群张毅朱建辉陈胜蔡群唐海江张彦
Owner NINGBO EXCITON TECH
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