Coating composition for back protection layer of diffusion membrane and diffusion membrane

A technology of back protective layer and coating composition, applied in the direction of coating, diffusing element, etc., can solve the problem of poor scratch resistance of the back protective layer, and achieve the effects of good adhesion, good scratch resistance, and high-efficiency adhesion

Inactive Publication Date: 2018-05-18
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of poor scratch resistance of the back protective layer of the existing diffusion film, the invention provides a coating composition for the back protective layer of the diffusion film and a diffusion film

Method used

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  • Coating composition for back protection layer of diffusion membrane and diffusion membrane

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preparation example Construction

[0056] The preparation method of the coating composition provided by the invention: mix the polyol copolymer, curing agent, polyurethane acrylate oligomer, monomer, photoinitiator, and diffusion particles according to the proportion, and then add diluent to adjust the viscosity Wait until 14-20s, stir evenly, and after filtration, the coating composition that can be coated on the substrate is obtained.

[0057] Further, attention should be paid to shading treatment during the preparation process.

[0058] Further, the viscosity of the coating composition is measured using a Tu-4 cup.

[0059] The coating composition provided by the present invention is applied to the use method of the diffusion film. A wire bar coater is used to evenly coat the uniformly mixed coating composition on a non-chemically treated common substrate, and bake at 100°C for 1 -2min, then UV curing under UV curing lamp, curing condition 200-800mj / cm 2 , and finally the coating and the substrate are cure...

Embodiment 1

[0067] The present invention provides a coating composition for a backside protective layer of a diffusion film and a diffusion film.

[0068] The coating composition comprises: 10% of polyol copolymer, 1% of curing agent, 20% of polyurethane acrylate oligomer, 10% of monomer, 1.5% of photoinitiator, 0.2% of diffusing particle and 57.3% of diluent. The polyol copolymer is polyethylene adipate diol; the curing agent is isocyanate trimer; the urethane acrylate oligomer is 12-functional aliphatic urethane acrylate resin. The monomer is tetrahydrofuran acrylate; the photoinitiator is Irgacure 184; the diffusion particles are polymethyl methacrylate particles with a particle size distribution of 1-40 μm; the diluent is toluene.

[0069] Mix the coating composition evenly, then coat it on a non-chemically treated common substrate, bake it at 100°C for 1 min, and then perform UV curing under a UV curing lamp, the curing condition is 400mj / cm 2 , and finally the coating and the subst...

Embodiment 2

[0071] The coating composition and the diffusion film used for the back protective layer of the diffusion film as provided in Example 1, the coating composition includes: polyol copolymer 30%, curing agent 3%, polyurethane acrylate oligomer 10 %, monomer 5%, photoinitiator 0.15%, diffusion particles 0.25%, diluent 51.60%. The polyol copolymer is polyethylene adipate-propylene glycol ester diol; the curing agent is an isocyanate trimer; the polyurethane acrylate oligomer is a 4-functional alicyclic polyurethane acrylic resin ester; the monomer is dipentaerythritol hexaacrylate; the photoinitiator is Irgacure369; the diffusion particles are polybutylmethacrylate particles with a particle size distribution of 1-40 μm; the diluent to ethyl acetate.

[0072] Mix the coating composition evenly, then coat it on a non-chemically treated common substrate, bake it at 100°C for 2 minutes, and then perform UV curing under a UV curing lamp, the curing condition is 800mj / cm 2 , and finall...

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Abstract

The invention relates to the technical field of high-performance coating materials, and particularly relates to a diffusion coating composition for a back protection layer of a diffusion membrane andthe diffusion membrane. In order to solve the problem of poor scratch resistance of the back protection layer of an existing diffusion membrane, the invention provides the coating composition for theback protection layer of the diffusion membrane and the diffusion membrane. The coating composition is prepared from 10%-30% of polyol copolymer, 1%-3% of a curing agent, 10%-20% of polyurethane acrylate oligomer, 5%-10% of monomers, 0.15%-1.5% of a photoinitiator, 0.2%-0.3% of diffusion particles and 36%-60% of a diluting agent. The coating composition provided by the invention is applied to a common substrate which is subjected to non-chemical treatment, and the back protection layer formed by curing has good scratch resistance and has good adhesive force with the substrate.

Description

technical field [0001] The invention relates to the technical field of high-performance coating materials, in particular to a diffusion coating composition used for a back protective layer of a diffusion film and a diffusion film. Background technique [0002] Diffusion films can achieve uniform and soft images, and are widely used in liquid crystal display devices, advertising light boxes, lighting devices, mobile communication equipment buttons, etc. At present, as the price of diffusion membranes has been falling all the way, domestic membrane manufacturers have become more and more strict in controlling the cost of raw materials. Non-chemically treated common substrates, especially corona treated substrates, are widely used in the production of diffusion films because of their low price. There is no chemical coating on the surface of these common substrates, so the surface cannot be efficiently combined with UV-curable glue (usually acrylate), and ordinary thermosetting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C09D7/65G02B5/02
Inventor 李刚叶群余洋宋庆欢于振江张毅唐海江张彦
Owner NINGBO EXCITON TECH
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