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Environment-friendly OCA (Optical Clear Adhesive) and preparation method thereof

An environmentally friendly, optical adhesive technology, applied in the field of optical adhesives, can solve the problems of touch screen detachment and reduced bonding strength of optical adhesives, and achieve the effects of reducing damage, improving light transmission performance, and improving anti-glare performance

Pending Publication Date: 2022-07-12
深圳市创新精细玻璃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is moisture in the air. After long-term use of the touch screen, the optical glue at the corners will be infiltrated by contact with water molecules in the air for a long time, resulting in a decrease in the bonding strength of the optical glue and the problem of detachment of the touch screen.

Method used

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  • Environment-friendly OCA (Optical Clear Adhesive) and preparation method thereof
  • Environment-friendly OCA (Optical Clear Adhesive) and preparation method thereof
  • Environment-friendly OCA (Optical Clear Adhesive) and preparation method thereof

Examples

Experimental program
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Effect test

preparation example 1

[0042] The acrylate prepolymer of this preparation example is obtained by the following method:

[0043] (1) Pre-reaction: After mixing 10kg of 3,3,5-trimethylcyclohexanol and 7kg of acrylic acid, the temperature was raised to 60°C under a nitrogen atmosphere. After mixing and stirring for 3 minutes, 2kg of p-toluenesulfonic acid was added, and the temperature was continued to rise to 110°C. , after mixing and stirring for 2h, the reactant was obtained;

[0044] (2) Refining: the reactant is subjected to pH adjustment treatment and then subjected to reduced pressure distillation to obtain 3,3,5-trimethylcyclohexanol acrylate; the pH adjustment treatment is as follows: adding 3kg to the reactant with a concentration of 0.1 mol / L sodium hydroxide solution, mixed and stirred to obtain a neutralization solution; the neutralization solution was left to stand for stratification, and the oil phase was washed with water until the pH was 7.

[0045](3) Preparation of acrylate prepolym...

preparation example 2-3

[0047] The difference between Preparation Example 2-3 and Preparation Example 1 is that the ratio of raw materials in each step is different.

preparation example 2

[0049] (1) Pre-reaction: After mixing 15kg of 3,3,5-trimethylcyclohexanol and 11kg of acrylic acid, the temperature was raised to 60°C under a nitrogen atmosphere. After mixing and stirring for 3 minutes, 3kg of p-toluenesulfonic acid was added, and the temperature was continued to rise to 110°C. , after mixing and stirring for 2h, the reactant was obtained;

[0050] (2) Refining: the reactant is subjected to pH adjustment treatment and then vacuum distillation to obtain 3,3,5-trimethylcyclohexanol acrylate; the pH adjustment treatment is as follows: adding 4.5kg to the reactant with a concentration of 0.1 mol / L sodium hydroxide solution, mixed and stirred to obtain a neutralization solution; the neutralization solution was left to stand for stratification, and the oil phase was washed with water until the pH was 7.

[0051] (3) Preparation of acrylate prepolymer: take 40% mass fraction of 3,3,5-trimethylcyclohexanol acrylate in step (2), 22.5kg acetone, 9kg dodecyl mercaptan,...

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Abstract

The invention relates to the technical field of optical cement, in particular to environment-friendly OCA (Optical Clear Adhesive) and a preparation method thereof. The environment-friendly OCA optical adhesive comprises the following raw materials in parts by weight: 40-60 parts of an acrylate prepolymer; 0.5 to 2 parts of a photoinitiator; 30 to 60 parts of a reactive diluent; 1 to 3 parts of diglycolamine; 6-10 parts of a waterproof agent; the waterproof agent comprises fluorosilane and a mercapto compound which are mixed according to the mass ratio of (2-4): (6-9). The preparation method of the environment-friendly OCA optical adhesive comprises the following steps: mixing and stirring the acrylate prepolymer, the photoinitiator, the reactive diluent and the waterproof agent according to the formula, and irradiating for 20-40 minutes by ultraviolet light to obtain the environment-friendly OCA optical adhesive. The environment-friendly OCA optical cement disclosed by the invention has the advantage that the bonding strength is not easy to reduce after long-term use; in addition, the preparation method has the advantage of being green and environmentally friendly.

Description

technical field [0001] The present application relates to the technical field of optical adhesives, and more particularly, to an environment-friendly OCA optical adhesive and a preparation method thereof. Background technique [0002] OCA Optical Adhesive is a specialty adhesive used to bond transparent optical components. It is required to have the characteristics of colorless and transparent, excellent light transmittance, good bonding strength, curing at room temperature or medium temperature, and small curing shrinkage. [0003] Optical glue is often used as an adhesive for touch screens. One side is bonded to the touch screen glass, and the other side is bonded to a peelable polyester film. When the touch screen is installed, tear off the polyester film to expose one side of the optical adhesive, and then bond the optical adhesive on the side to the object to be adhered, so as to realize the installation of the touch screen. However, there is moisture in the air. Afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/06
CPCC09J4/06C09J11/06
Inventor 伍委洲陈瑞平赖湘洪潘爱平朱桂林
Owner 深圳市创新精细玻璃有限公司
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