Optical adhesive and preparation method thereof

An adhesive and optical technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problem of poor performance such as boiling water resistance and solvent resistance, and it is difficult to meet the requirements of 5B adhesion of 100 grids. Curing Slow speed and other problems, to achieve superior moisture and heat resistance, promote light curing reaction, increase the effect of crosslinking density

Inactive Publication Date: 2017-09-15
COLLTECH DONGGUAN BONDING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Optical adhesives are widely used in the electronics industry. OCA film and LOCA are commonly used in the market. The main components are acrylate polymers and rubber-modified elastomers. The cured cross-linking density is low, and they are mainly used for LCD touch screens. In the bonding process of the screen, the filling and bonding between the touch screen and the LCD module has the advantages of yellowing resistance, elasticity, low hardness, high light transmittance, low haze, etc., and also has the advantages of slow curing speed and sticky Disadvantages such as poor relay, poor colloidal body strength, and poor solvent resistance
At present, most of OCA and LOCA can only play the role of filling, and the adhesion to the glass surface is not enough, especially in the case of a thin adhesive layer (below 50 microns), it is difficult to meet the requirement of 5B adhesion of 100 cells, and the resistance Boiling w

Method used

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  • Optical adhesive and preparation method thereof
  • Optical adhesive and preparation method thereof
  • Optical adhesive and preparation method thereof

Examples

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preparation example Construction

[0053] An embodiment of the present invention proposes a preparation method of an optical adhesive, which comprises: 50-70 parts of polyester polyurethane acrylate, 10-40 parts of reactive diluent, 1-5 parts of photoinitiator, defoamer 0.2-0.8 parts, 0.5-1.0 parts of wetting and leveling agent, 0.2-0.4 parts of surfactant, 0.5-4 parts of siloxane coupling agent, 0.5-2.0 parts of thixotropic agent, 1-10 parts of filler, after planetary Type defoaming mixer 1800-2200r / min, after stirring for 5-10min, filter and pack into the needle tube, and use a high-speed centrifugal defoamer to defoam again, the defoaming rate is 2300-2800r / min, and the defoaming time is 3-5min , to obtain the above-mentioned optical adhesive.

[0054] A kind of polyester polyurethane acrylate A that an embodiment of the present invention proposes, methyl propylene glycol 180g, propylene glycol 76g, trimethylolpropane 70g, adipic acid 145g, succinic acid 177g under the condition of band water solvent Esteri...

Embodiment 1

[0057] The preparation method of the optical adhesive proposed by an embodiment of the present invention, accurately weighed by weight (using an electronic scale with an accuracy of 0.01g), self-synthesized polyester urethane acrylate A: 20g, self-synthesized polyester urethane acrylate B: 35g; THFA: 18g; HPMA: 20g; AA: 6.6g; Coupling agent A-174: 1.5g; LBR-307: 2g; Photoinitiator 1173: 2.0g; Photoinitiator TPO: 1.5g; Leveling agent WT270: 0.5g; defoamer 931: 0.3g; thixotropic agent 3440: 1.3g; surfactant FL2300: 0.2g; After 10 minutes, filter through a filter with a mesh size of 1000 or more and pack into needle tubes, and use a high-speed centrifugal defoamer to defoam again. The defoaming rate is 2300-2800r / min, and the defoaming time is 3-5min. The optical adhesive is obtained; the appearance of the optical adhesive Colorless and transparent, the viscosity is controlled at 350mPa.s / 25℃.

[0058] The optical adhesive proposed by an embodiment of the present invention is pr...

Embodiment 2

[0074] The preparation method of the optical adhesive proposed by an embodiment of the present invention, accurately weighed by weight (using an electronic scale with an accuracy of 0.01g), self-synthesized polyester urethane acrylate A: 35g, self-synthesized polyester urethane acrylate B: 35g; THFA: 16g; HPMA: 15g; AA: 5.0g; DMAA: 10g; coupling agent A-174: 2.0g; filler LBR-307: 3g; photoinitiator 1173: 2.5g; g; leveling agent WT270: 0.5g; defoamer 931: 0.5g; thixotropic agent 3440: 1.0g; surfactant FL2300: 0.2g; min, after stirring for 5-10 minutes, filter through a filter of 1000 mesh or more and put it into a needle tube, and use a high-speed centrifugal defoamer to defoam again. The defoaming rate is 2300-2800r / min, and the defoaming time is 3-5min. Adhesive; optical adhesive is colorless and transparent in appearance, and its viscosity is controlled at 420mPa.s / 25℃.

[0075] The optical adhesive proposed by an embodiment of the present invention is prepared by the above...

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Abstract

The invention relates to an optical adhesive and a preparation method thereof, the optical adhesive comprises, by weight 45-80 parts of polyester polyurethane acrylate; 10-40 parts of a reactive diluent; 0.5-6 parts of a photoinitiator; 1-10 parts of a filler and 0.5-5 parts of an additive. The optical adhesive is mainly applied to mobile phone, tablet personal computer and other electronics industries, aims at slow OCA and LOCA curing speed, poor adhesion strength, poor solvent resistance, poor adhesive body strength and other defects, can achieve the functions of protective coating, adhesion and filling and the like of glass surface or the glass surface treated with a coating , and has the advantages of no solvent, single component, fast curing speed, excellent adhesion, high adhesive body strength, good solvent resistance, good damp heat resistance and the like.

Description

technical field [0001] The invention relates to an adhesive and a preparation method thereof, in particular to an optical adhesive and a preparation method thereof. Background technique [0002] Optical adhesives are widely used in the electronics industry. OCA film and LOCA are commonly used in the market. The main components are acrylate polymers and rubber-modified elastomers. The cured cross-linking density is low, and they are mainly used for LCD touch screens. In the bonding process of the screen, the filling and bonding between the touch screen and the LCD module has the advantages of yellowing resistance, elasticity, low hardness, high light transmittance, low haze, etc., and also has the advantages of slow curing speed and sticky Disadvantages such as poor relay, poor colloid body strength, and poor solvent resistance. At present, most of OCA and LOCA can only play the role of filling, and the adhesion to the glass surface is not enough, especially in the case of a...

Claims

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Application Information

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IPC IPC(8): C09J175/14
Inventor 李兆国黄成生
Owner COLLTECH DONGGUAN BONDING TECH CO LTD
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