Preparation method of optical adhesion agent and AB glue protecting film

An adhesive, optical technology, used in adhesives, adhesive types, polyurea/polyurethane adhesives, etc. Suitable, reasonable molecular weight distribution, good weather resistance

Inactive Publication Date: 2018-12-11
JIANGYIN TONGLI OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic UV-curable optically transparent pressure-sensitive adhesives are only continuously improved on the basis of liquid adhesives, and have the disadvantages of low holding force, poor light transmittance, and poor anti-yellowing performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of embodiment 1 optical adhesive comprises the synthesis of acrylate reactive prepolymer, and the synthesis of acrylate reactive prepolymer comprises the following steps:

[0024] S1: Separate dehydration pretreatment of hydroxyl functionalized acrylate and polypropylene glycol;

[0025] S2: Under the protection of nitrogen, add polypropylene glycol to diisocyanate in batches, and heat to 53-55°C to react until the -NCO content in the reaction solution remains unchanged;

[0026] S3: adding hydroxyl-functionalized acrylate, polymerization inhibitor and first reactive diluent to the reaction system of S2, heating to 72-75° C. to react until the -NCO content is zero, and obtaining an acrylate reactive prepolymer;

[0027] The molar ratio of diisocyanate, polypropylene glycol and hydroxy-functional acrylate is 2:1:2, the weight percent of inhibitor in the acrylate-reactive prepolymer is 0.3%, the first active in the acrylate-reactive prepolymer The ...

Embodiment 2

[0031] The difference between embodiment 2 and embodiment 1 is that the molar ratio of diisocyanate, polypropylene glycol and hydroxyl-functionalized acrylate is 2.1:1:2, and the weight percentage of the polymerization inhibitor in the acrylate reactive prepolymer is 0.2%, The weight percent of the first reactive diluent in the acrylate reactive prepolymer is 20%; the content of 2,4-toluene diisocyanate in the diisocyanate is 93%.

Embodiment 3

[0033] The difference between embodiment 3 and embodiment 2 is that the molar ratio of diisocyanate, polypropylene glycol and hydroxyl-functionalized acrylate is 2.05:1:2, and the weight percentage of the polymerization inhibitor in the acrylate reactive prepolymer is 0.25%, The weight percent of the first reactive diluent in the acrylate reactive prepolymer is 17%; the content of 2,4-toluene diisocyanate in the diisocyanate is 97%.

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PUM

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Abstract

The invention discloses a preparation method of an optical adhesion agent. The method comprises synthesis of an acrylate reactive prepolymer. The synthesis of the acrylate reactive prepolymer comprises the following steps: S1, respectively dehydrating hydroxy functionalized acrylate and polypropylene glycol; S2, adding polypropylene glycol into diisocyanate under the protection of nitrogen, heating to 53-55DEG C, reacting until the content of NCO in reaction liquid is maintained to be unchanged; S3, adding hydroxy functionalized acrylate, a polymerization inhibitor and a first active diluent into the reaction system of S2, heating to 72-75DEG C, and reacting until the content of NCO is zero, so as to obtain the acrylate reactive prepolymer. Diisocyanate is formed by combining 2,4-toluene diisocynate with dicyclohexyl methane diisocyanate. Combined diisocyanate is few in byproduct reaction, the obtained prepolymer is moderate in viscosity and reasonable in molecular weight distribution.The invention also provides an AB glue protecting film.

Description

technical field [0001] The invention belongs to the technical field of screen protective films, and in particular relates to a preparation method of an optical adhesive and an AB glue protective film. Background technique [0002] AB adhesive protective film is used as a transitional adhesive film between the tempered glass film and the protected base surface. It can be used not only on the screen surface of electronic products, but also on glass surfaces such as doors, windows, tea tables, and shower rooms. The film structure of the preparation method of the optical adhesive includes an optical pressure-sensitive adhesive layer, a high-transparency PET (polyethylene terephthalate) film layer, and a silica gel layer from the outside to the inside. The product screen or glass fits together. "AB" in the preparation method of the optical adhesive refers to the adhesive glue of different materials located on both sides of the high-transparency PET film layer. When the optical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J7/25C09J7/38C08G18/67C08G18/48
CPCC08G18/4825C08G18/672C09J175/14C09J2203/318C09J7/25C09J7/38C09J2301/122C09J2301/302C08G18/48
Inventor 周永南
Owner JIANGYIN TONGLI OPTOELECTRONICS TECH
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