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LOCA (Liquid Optical Clear Adhesive) and preparation method thereof

An optically transparent and adhesive technology, applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of insufficient elasticity and hardness, poor yellowing resistance, and high optical radiation energy, to prevent Free radical polymerization, effect of good photocuring properties

Active Publication Date: 2016-04-27
矽时代材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing UV-moisture dual-curable liquid optically transparent adhesive LOCA has defects such as low photocuring rate or high light radiation energy required, insufficient elasticity and hardness, and poor yellowing resistance.

Method used

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  • LOCA (Liquid Optical Clear Adhesive) and preparation method thereof
  • LOCA (Liquid Optical Clear Adhesive) and preparation method thereof
  • LOCA (Liquid Optical Clear Adhesive) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] S1. Add 0.4 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) to 40 parts of AS-1 with a viscosity of 20000cps and 60 parts of AS-2 with a viscosity of 3000cps, and heat Dehydration under vacuum conditions for 2h;

[0077] S2. After cooling to room temperature, add 4 parts of methyltrimethoxysilane to the above base polymer, and continue to stir for 30min under vacuum;

[0078]S3. Add 0.4 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone and 0.15 parts of dibutyltin dilaurate to the above base polymer, and continue to stir for 0.5h under vacuum mix it well;

[0079] S4. After vacuum defoaming and sealed storage, the product is a liquid optically transparent adhesive.

Embodiment 2

[0081] S1. Add 0.5 parts of p-methoxyphenol to 100 parts of AS-2 with a viscosity of 3000cps and 60 parts of methyldimethoxy-terminated polydimethylsiloxane with a viscosity of 30000cps, and heat it at 600pa, 120°C and Dehydration under vacuum conditions for 2h;

[0082] S2. After cooling to room temperature, add 8 parts of methyltrimethoxysilane to the above base polymer, and continue to stir for 50min under vacuum;

[0083] S3. 0.5 part of 2-hydroxyl-2-methyl-1-phenyl-1-propanone, 0.2 part of diisopropoxy bis(ethyl acetoacetate)titanium are added together in the above-mentioned basic polymer, and in Continue to stir for 0.5h under vacuum to make it fully mixed;

[0084] S4. After vacuum defoaming and sealed storage, the product is a liquid optically transparent adhesive.

Embodiment 3

[0086] S1. Add 0.5 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) to 100 parts of AS-2 synthesized in Example 1, 40 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 30000 cps and 10 parts methyl MQ resin ({(CH 3 ) 3 SiO 1 / 2} 0.44 (SiO 4 / 2 ) 0.56 ), and dehydrated at 600Pa, 120°C and vacuum for 2 hours;

[0087] S2. After cooling to room temperature, add 9 parts of methyltrimethoxysilane to the gum base, and continue stirring for 60 minutes under vacuum;

[0088] S3. Add 0.5 part of 1-hydroxycyclohexyl benzophenone and 0.2 part of stannous octoate to the above-mentioned base polymer, and continue stirring for 0.5 h under vacuum to make it fully mixed;

[0089] S4. After vacuum defoaming and sealed storage, the product is a liquid optically transparent adhesive.

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Abstract

The invention discloses an LOCA (Liquid Optical Clear Adhesive), and a preparation method and application of the LOCA. The LOCA is prepared from (A) 100 parts of (methyl) acryloyloxy alkylate polysiloxane, (B) 0 to 200 parts of hydroxyl or alkoxyl end-capping poly dialkyl siloxane, (C) 0 to 100 parts of organic silicon resin, (D) cross-linking agent which occupies 0 to 10 percent of the total amount of (A), (B) and (C) and connected with silicon and can be used for hydrolyzing groups, (E) 0.01 to 5 parts of photoinitiator, (F) 0.01 to 5 parts of polymerization inhibitor and (G) 0.0001 to 2 parts of condensation catalyst. The LOCA disclosed by the invention not only can be cured through an ultraviolet irradiation mode, but also can be cured through a moisturizing mode, and the LOCA can be widely applied to the adhesion of display screens, touch screens and optical devices.

Description

technical field [0001] The invention relates to the field of organosilicon polymer materials, more specifically, to a liquid optically transparent adhesive LOCA capable of dual curing by ultraviolet light and moisture and a preparation method thereof. Background technique [0002] With the advent of the smart era, tablet computers and touch-screen mobile phones have become increasingly popular, and the excellent visual effects of display panels will be favored by more people. Using liquid optically clear adhesive (LOCA) to fill the air layer between the touch screen and the display panel can reduce glare and light loss, increase the contrast, especially under strong light, and significantly improve the visual effect of the display panel . [0003] LOCA, a liquid optically transparent adhesive based on acryloyloxyalkyl modified polyorganosiloxane modified materials, has the characteristics of non-toxic, odorless, high light transmittance and good adhesion. The dual characte...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/08C09J11/06
CPCC08L2201/08C08L2201/10C08L2205/025C08L2205/03C09J11/06C09J11/08C09J183/06C08L83/06C08L83/04C08K5/5419
Inventor 康润华许静文
Owner 矽时代材料科技股份有限公司
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