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Liquid optical clear adhesive for liquid crystal display touch screen and preparation method thereof

An optically transparent adhesive, touch screen technology, applied in the direction of adhesives, rubber-derived adhesives, adhesive types, etc., can solve the problems of low transmittance, adhesive discoloration, yellowing, etc., to achieve good fluidity, easy adhesive layer thickness , Adhesive strength and anti-yellowing effect

Inactive Publication Date: 2012-10-17
烟台伟昌电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves the problems of discoloration, yellowing and low transmittance of the adhesive used for touch screen lamination

Method used

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  • Liquid optical clear adhesive for liquid crystal display touch screen and preparation method thereof
  • Liquid optical clear adhesive for liquid crystal display touch screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 55g of maleic anhydrided isoprene telomer with molecular weight between 12000~18000, 30g of liquid butadiene rubber, 4g of liquid polybutadiene and its derivatives, 4g of cyanide terpene resin, formazan Acrylic acid-2-hydroxypropyl ester 4g (Germany Connect Chemical Company); 4,6-bis(dodecylthiomethyl)-O-cresol 0.2g (Germany Bayer (Bayer) company); Japan Fuji Chemical 1020 ( Latent modified amine curing agent) 0.2g was stirred at 60°C for 3 hours to make it evenly mixed.

[0034] Lower the temperature to 40°C, add 1.2 g of photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and 1.4 g of α-hydroxy ketone to the mixture obtained in the above steps, and continue stirring for 2 hours , until the materials are completely miscible.

[0035] After checking that the viscosity is between 600-800cps, the material is filtered through a 1800-mesh stainless steel screen, vacuumed and kept at a vacuum degree of -0.1MPa for 60 minutes, and the air bubbles in the mixt...

Embodiment 2

[0037] Weigh 50 g of maleic anhydrided isoprene telomer with a molecular weight of 12,000 to 18,000, 5 g of a maleic anhydrided isoprene telomer with a molecular weight of 32,000 to 38,000, and 30 g of liquid butadiene rubber Liquid polybutadiene and derivatives thereof 4g; Cyanide terpene resin 4g; Methacrylate-2-hydroxypropyl 4g (Germany Connect chemical company); 4,6-bis(dodecylthiomethyl)- O-cresol 0.2 g (Bayer, Germany); Japan Fuji Chemical 10200.2 g (latent modified amine curing agent) were stirred at 60° C. for 3 hours to make them evenly mixed.

[0038] Lower the temperature to 40°C, add 1.2 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and 1.4 g of α-hydroxy ketone to the mixture obtained in the above steps, and continue stirring for 2 hours until the material Completely miscible.

[0039] After checking that the viscosity is between 1200 and 1600cps, the material is filtered through a 1800-mesh stainless steel sieve, vacuumed and maintained at a vacuum degree ...

Embodiment 3

[0041] Weigh 45 g of maleic anhydrided isoprene telomer with a molecular weight of 12,000 to 18,000, 10 g of a maleic anhydrided isoprene telomer with a molecular weight of 32,000 to 38,000, and 30 g of liquid butadiene rubber Liquid polybutadiene and derivatives thereof 4g; Cyanide terpene resin 4g; Methacrylate-2-hydroxypropyl 4g (Germany Connect chemical company); 4,6-bis(dodecylthiomethyl)- 0.2 g of O-cresol (Bayer, Germany); 0.2 g of Fuji Chemical 1020 (latent modified amine curing agent) were stirred at 60° C. for 3 hours to make them evenly mixed.

[0042] Lower the temperature to 40°C, add 1.2 g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and 1.4 g of α-hydroxy ketone to the mixture obtained in the above steps, and continue stirring for 2 hours until the material Completely miscible.

[0043] After checking that the viscosity is between 1800 and 2200cps, the material is filtered through a 1800-mesh stainless steel sieve, vacuumed and maintained at a vacuum degre...

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Abstract

The invention relates to a liquid optical clear adhesive (LOCA) for a liquid crystal display (LCD) touch screen and a preparation method thereof. The adhesive comprises 0-75 weight parts of liquid synthetic rubber A or B in primary forms, 10-30 weight parts of butadiene polymer, 3-5 weight parts of liquid polybutadiene and its derivative, 1-5 weight parts of terpene resin, 1-5 weight parts of modifier, 0.1-1 weight parts of antioxidant, 0.1-1 weight parts of latent curing agent, and 0.1-3 weight parts of photoinitiator, wherein the A is maleated isoprene telomer with the molecular weight being between 12000-18000, the B is maleated isoprene telomere with the molecular weight being between 32000-38000, and A and B are not 0 weight part simultaneously. The preparation method comprises the steps of mixing and dissolving, filtering, conducting vacuum pumping, etc. The LOCA of the invention has high bonding strength, high light transmittance, good ductility, small cure shrinkage, and yellowing resistance, and the preparation method is simple and green. The invention has a wide scope of application.

Description

technical field [0001] The invention relates to a special adhesive mainly used for bonding transparent optical elements, in particular to a liquid optical transparent adhesive (LOCA) for a liquid crystal touch screen and a preparation method thereof. Background technique [0002] (Liquid Optical Clear Adhesive) The application market of liquid optical clear adhesive in touch screen is very huge. The touch screen is undergoing a revolution, and the traditional resistive touch screen is gradually being replaced by the capacitive touch screen, all of which originate from the use of new materials of liquid optical transparent glue. LOCA is a special adhesive used for the bonding of transparent optical components. It is required to be colorless and transparent, with a light transmittance above 98; good bonding strength, good softness and ductility, suitable for bonding of different materials; it can be used at room temperature or medium temperature Curing under the same conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J115/00C09J109/00C09J11/06C09J11/08
Inventor 刘晓彦杜燃利董新超刘晓霞刘长柱
Owner 烟台伟昌电子材料有限公司
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