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Solvent-free UV curing hardening liquid, preparation method thereof and hardened film

A curing hardening, solvent-free technology, applied in the field of hardening film, solvent-free UV curing hardening liquid, to achieve good hydrophobicity, enhanced hardness and scratch resistance

Active Publication Date: 2022-03-08
SHENZHEN TONGTAIYING ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Known application number 201310059035.8, titled as a PET three-layer anti-scratch protective film prior art, which discloses a three-layer anti-scratch protective film including PET release film, PET substrate and PET protective film, but its hardness can only reach 4H

Method used

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  • Solvent-free UV curing hardening liquid, preparation method thereof and hardened film
  • Solvent-free UV curing hardening liquid, preparation method thereof and hardened film

Examples

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preparation example Construction

[0038] Wherein, the preparation method of the special silicon-modified resin comprises the following steps:

[0039] S01: acrylic acid soft monomer, acrylic hard monomer, and carboxyl group-containing acrylic acid monomer and photoinitiator are stirred and mixed, and UV light is reacted;

[0040] S02: adding monomers containing siloxane groups dropwise, and performing UV light reaction to obtain a special silicon-modified resin with a molecular weight of 5000-15000.

[0041] The solvent-free UV curing liquid of the present invention is introduced into the hardening liquid by using special silicon-modified resin, which can significantly enhance the hardness and scratch resistance of the cured film compared with other similar hardening liquids on the market; The introduction also makes the hardened film have good hydrophobic properties.

[0042] The specific embodiment of the present application also provides a solvent-free UV curing solution, which is prepared by the above-men...

Embodiment 1

[0066] This embodiment provides a method for solvent-free UV curing of the hardening solution and its hardening film, specifically:

[0067] Polyurethane or acrylate prepolymer 50 parts

[0068] Dilute monomer 5 parts

[0069] 1 part photoinitiator

[0070] Special silicon modified resin 5 parts

[0071] Weigh the above components respectively, put them into a stirring tank, and stir at a constant speed for 1-2 hours to obtain a solvent-free UV curing hardening solution with a measured viscosity of 4000mPa.s. Use the above hardening solution to coat / coat on PET, and cure by UV lamp irradiation for 15s to obtain a cured film. The thickness of the PET substrate is 188 μm, and the thickness of the coating is 7 μm. According to GB / T 6739-2006, the film hardness is 5H; 0000# steel wool scratch resistance test, 1kg load, 10,000 times back and forth without scratches; according to GB / T 30693-2014, the water contact angle is 102°.

Embodiment 2

[0073] This embodiment provides a method for solvent-free UV curing of the hardening solution and its hardening film, specifically:

[0074] 80 parts polyurethane or acrylate prepolymer

[0075] Dilute monomer 40 parts

[0076] 8 parts of photoinitiator

[0077] 20 parts of special silicon modified resin

[0078] Weigh the above components respectively, put them into a stirring tank, and stir at a constant speed for 1-2 hours to obtain a solvent-free UV curing hardening solution with a measured viscosity of 2600mPa.s. Use the above hardening solution to coat / coat on PET, and cure by UV lamp irradiation for 45s to obtain a cured film. The thickness of the PET substrate is 188 μm, and the thickness of the coating is 15 μm. According to GB / T 6739-2006, the film hardness is 8H; 0000# steel wool scratch resistance test, 1kg load, 12000 times back and forth without scratches; according to GB / T 30693-2014, the water contact angle is 105°.

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Abstract

The invention provides a solvent-free UV curing hardening liquid, a preparation method thereof and a hardening film. The solvent-free UV curing hardening liquid is prepared by mixing a polyurethane prepolymer or an acrylate prepolymer, a diluting monomer, a photoinitiator and special silicon modified resin, the preparation method of the special silicon modified resin comprises the following steps: S01, stirring and mixing an acrylic acid soft monomer, an acrylic acid hard monomer, an acrylic acid monomer containing a carboxyl group and a photoinitiator, and carrying out UV illumination reaction; and S02, dropwise adding a monomer containing a siloxane group, and carrying out a UV illumination reaction to obtain the special silicon modified resin with the molecular weight of 5000-15000. The special silicon modified resin is introduced into the hardening liquid, so that compared with other similar hardening liquids in the market, the hardness and scratch resistance of a hardened film can be remarkably enhanced; in addition, along with the introduction of silicon, the hardened film also has good hydrophobicity.

Description

technical field [0001] The invention relates to a UV curing solution for preparing a cured film, in particular to a solvent-free UV curing solution, a preparation method thereof and a cured film. Background technique [0002] Hardening solution can be used to prepare hardened film, which is mainly used in consumer electronics, household and other scenarios. [0003] Existing hardening fluids usually contain solvents, which need to be removed by heating during use, which consumes a lot of energy and pollutes the environment. Existing hardening fluids are usually cured by thermal curing or photothermal dual curing. Similar products that use pure UV curing usually have low hardness and poor scratch resistance; in addition, the common hardened coatings currently on the market are hard and brittle, and do not have hydrophobic and oleophobic properties themselves. [0004] Known application number 201310147481.4, the name is a kind of anti-scratch PC film for optical display scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D175/14
CPCC09D4/06C09D175/14Y02E10/50
Inventor 王江章彦莫海彬何云蔚胡涢波
Owner SHENZHEN TONGTAIYING ELECTRONICS TECH CO LTD
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