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Low-shrinkage photo-curable pressure-sensitive adhesive

A low-shrinkage, light-curing technology, used in adhesives, non-polymer organic compound adhesives, non-polymer adhesive additives, etc., can solve the problem of large volume shrinkage, low cross-link density, and substrate bonding. Insufficient power, etc.

Inactive Publication Date: 2020-10-27
SHENZHEN NIKTO TAPE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The volume shrinkage of the pressure-sensitive adhesive in the prior art is large after curing, which directly affects the adhesion strength of the pressure-sensitive adhesive to the substrate. When the shrinkage rate is too high, the internal stress generated at the interface of the substrate due to high volume shrinkage will lead to a decrease in the bonding strength. , will also cause poor positioning such as deviation; if the curable shrinkage rate is too low, the density of cross-linking points formed inside the cured pressure-sensitive adhesive will be low, that is, the cohesive strength of the adhesive after curing will be low. This in turn leads to insufficient adhesion of the pressure sensitive adhesive to the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A light-curable pressure-sensitive adhesive with low shrinkage rate, which is composed of the following components by weight: 50 parts of acrylate, 30 parts of isocyanate, 20 parts of natural rubber, 8 parts of styrene-butadiene rubber, 4 parts of nitrile rubber, rubber 20 parts of plasticizer, 3 parts of anti-aging agent, 2 parts of polymerization inhibitor, 2 parts of photoinitiator, 0.4 part of coupling agent.

[0021] The acrylates are 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 3-hydroxyl-2,2-dimethylpropyl-3-hydroxyl-2,2- Mixed combination of Dimethyl Propyl Diacrylate Polypropylene Glycol Diacrylate.

[0022] The isocyanate is formed by mixing diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate in a mass ratio of 3:2:1:1.

[0023] The rubber plasticizer is prepared by mixing silicone oil, glycerin, oil shale powder, mica, rosin, benzoic acid and sodium chloride in a mass ratio of 6:6:4:4:3:...

Embodiment 2

[0034] A light-curing pressure-sensitive adhesive with low shrinkage rate, which is composed of the following components by weight: 80 parts of acrylate, 50 parts of isocyanate, 30 parts of natural rubber, 12 parts of styrene-butadiene rubber, 2 parts of nitrile rubber, rubber 10 parts of plasticizer, 1.5 parts of anti-aging agent, 1.5 parts of polymerization inhibitor, 0.5 parts of photoinitiator, and 0.4 parts of coupling agent.

[0035] The acrylate is butyl acrylate.

[0036] The isocyanate is a mixture of diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate in a mass ratio of 3:2:1:1

[0037] The rubber plasticizer is prepared by mixing silicone oil, glycerin, oil shale powder, mica, rosin, benzoic acid and sodium chloride in a mass ratio of 6:6:4:4:3:2:1.

[0038] The anti-aging agent is made of the following raw materials in parts by mass: 30 parts of vinylated phenol, 20 parts of N-isopropyl-N'-phenyl-p-phe...

Embodiment 3

[0048] A low-shrinkage light-curing pressure-sensitive adhesive, which consists of the following components by weight: 65 parts of acrylate, 40 parts of isocyanate, 25 parts of natural rubber, 10 parts of styrene-butadiene rubber, 3 parts of nitrile rubber, rubber 15 parts of plasticizer, 2 parts of anti-aging agent, 1.8 parts of polymerization inhibitor, 1.2 parts of photoinitiator, and 1.2 parts of coupling agent.

[0049] The acrylates are 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 3-hydroxyl-2,2-dimethylpropyl-3-hydroxyl-2,2- Dimethylpropyl Diacrylate Polypropylene Glycol Diacrylate, Triethylene Glycol Diacrylate, Propoxylated Neopentyl Glycol Diacrylate, Polyethylene Glycol Diacrylate, Trimethylolpropane Triacrylate , a mixture of pentaerythritol tetraacrylate, epoxy acrylate, modified acrylate, ethyl acrylate and butyl acrylate.

[0050] The isocyanate is formed by mixing diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyana...

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Abstract

The invention relates to a low-shrinkage photo-curable pressure-sensitive adhesive, which is composed of the following components by weight: 50-80 parts of acrylate, 30-50 parts of isocyanate, 20-30 parts of natural rubber, 8-12 parts of styrene butadiene rubber, 2-4 parts of nitrile rubber, 10-20 parts of a rubber plasticizer, 1.5-3 parts of an anti-aging agent, 1.5-2 parts of a polymerization inhibitor, 0.5-2 parts of a photoinitiator and 0.4-2 parts of a coupling agent. The photo-curable pressure-sensitive adhesive has the advantages that: the raw material proportion design is reasonable, the prepared photo-curable pressure-sensitive adhesive is low in shrinkage rate and has a good market popularization prospect in the field of pressure-sensitive adhesives, and the adhesive tape prepared through the method is moderate in peel strength, resistant to high temperature, free of pollution, resistant to aging and high in stability, so that the prepared pressure-sensitive adhesive tape isstable in adhesive property and wide in application scene.

Description

technical field [0001] The invention relates to a light-curing pressure-sensitive adhesive with low shrinkage Background technique [0002] The volume shrinkage of the pressure-sensitive adhesive in the prior art is large after curing, which directly affects the adhesion strength of the pressure-sensitive adhesive to the substrate. When the shrinkage rate is too high, the internal stress generated at the interface of the substrate due to high volume shrinkage will lead to a decrease in the bonding strength. , will also cause poor positioning such as deviation; if the curable shrinkage rate is too low, the density of cross-linking points formed inside the cured pressure-sensitive adhesive will be low, that is, the cohesive strength of the adhesive after curing will be low. This in turn leads to insufficient adhesion of the pressure-sensitive adhesive to the substrate. How to provide a light-curable pressure-sensitive adhesive with low shrinkage and its production method has ...

Claims

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Application Information

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IPC IPC(8): C09J4/02C09J4/06C09J11/04C09J11/06C09J11/08
CPCC09J4/06C09J11/04C09J11/06C09J11/08
Inventor 齐登武吴卫均
Owner SHENZHEN NIKTO TAPE NEW MATERIAL CO LTD
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