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A polyacrylate pressure sensitive adhesive

A technology of pressure-sensitive adhesives and polyacrylates, applied in the direction of ester copolymer adhesives, adhesive types, etc., can solve the problems of insufficient compatibility with diimonium salt dyes, etc., and achieve good bonding performance and internal High poly strength and good optical stability

Active Publication Date: 2016-11-23
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polyacrylate pressure-sensitive adhesive to solve the problem of insufficient compatibility between the existing acrylic pressure-sensitive adhesive and diimonium salt dye, which can improve the compatibility with the existing acrylic pressure-sensitive adhesive while maintaining good peel strength and cohesive strength. Compatibility of diimonium salts

Method used

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  • A polyacrylate pressure sensitive adhesive
  • A polyacrylate pressure sensitive adhesive
  • A polyacrylate pressure sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In access N 2 In the case of 300 parts of n-butyl acrylate, 100 parts of ethoxyethyl acrylate, 400 parts of cyclohexyl acrylate, acrylic acid accounting for 1% of the total amount of the above-mentioned monomers is proportionally mixed with 1% of the total amount of monomers. Dibenzoyl oxide and 300 parts of ethyl acetate were mixed and added to the reaction flask at one time. Stirring was started and the temperature was raised to 75°C by heating in a water bath, and the reaction was refluxed for 2 hours. The initiator solution consisting of 0.1% dibenzoyl peroxide and 150 parts of ethyl acetate, which accounts for 0.1% of the total amount of monomers, was added dropwise at a constant speed under continuous reflux, and the reflux reaction was continued for 4 hours. Then, the initiator solution consisting of 0.1% dibenzoyl peroxide and 150 parts of ethyl acetate was added dropwise at a constant speed under continuous reflux, and the temperature was raised to 80°C, and t...

Embodiment 2

[0039] The type and proportion of raw materials are adjusted to 50 parts of isooctyl acrylate, 100 parts of methoxyethyl methacrylate, 180 parts of cyclohexyl methacrylate, acrylic acid accounting for 4.2% of the total amount of the above monomers, and the polymerization temperature is changed to 80°C , and the temperature was raised to 85° C. in the later stage, and the rest of the polymerization method was the same as that of Example 1.

[0040] The pressure-sensitive adhesive solution is light yellow and transparent, with a solid content of 34% and a viscosity of 2320 mPa•s.

[0041] After the pressure-sensitive adhesive was mixed with hexafluorophosphate-N,N,N′,N′-tetrakis[p-bis(cyclohexylmethyl)aminophenyl]-p-phenylene diimmonium dye, the dye did not flocculate after one week Precipitation, transmission spectrum change rate 0.6%, peel strength 4.7N / 25mm (relative to optical glass, 180°peel), no adhesive residue on the bonding surface.

Embodiment 3

[0043] The type and proportion of raw materials are adjusted to 300 parts of ethylhexyl acrylate, 100 parts of methoxyethyl acrylate, 600 parts of cyclohexyl acrylate, hydroxypropyl acrylate accounting for 4% of the total amount of the above monomers, and the initiator is azobis Isobutyronitrile, all the other polymerization methods are with embodiment one.

[0044] The pressure-sensitive adhesive solution is colorless and transparent, without gel, with a solid content of 59% and a viscosity of 5120 mPa•s.

[0045] After the pressure-sensitive adhesive was mixed with 4% hexafluorophosphate-N,N,N',N'-tetrakis[p-bis(cyclohexylmethyl)aminophenyl]-p-phenylene diimmonium dye, after one week the dye No flocculation precipitation, transmission spectrum change rate 0.3%, peel strength 3.5N / 25mm (relative to optical glass, 180°peel), no adhesive residue on the bonding surface.

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Abstract

The invention belongs to the technical field of organic synthesis. Using alkoxy acrylate to partially replace alkyl acrylate can improve the compatibility with diimonium salt and achieve a balance between peel strength and cohesive strength. The polyacrylate pressure-sensitive adhesive involved in the present invention comprises at least 100 parts of alkoxy acrylate, 50-400 parts of alkyl acrylate, and 50-600 parts of cycloalkyl acrylate, and the cross-linking monomer accounts for the above-mentioned 1-5% of the total amount of the three monomers. The polyacrylate pressure-sensitive adhesive prepared by conventional solution polymerization has good adhesive performance, high cohesive strength, good optical stability, and has good compatibility with diimonium salt dyes. Capacitive, suitable for occasions with optical requirements, especially suitable for the preparation of functional optical films such as blocking films in flat panel displays with light transmission requirements.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and relates to the synthesis technology of polyacrylate optical adhesives, in particular to the technology of polyacrylate pressure-sensitive adhesives with good compatibility with near-infrared absorption dye diimonium salt. Background technique [0002] Diimonium salt near-infrared absorbing dyes have good solubility in organic solvents, and have a wide range of near-infrared absorption at 800-1100 nm, strong absorption, and high transmittance in the visible light region (400-800 nm), which is ideal near-infrared absorbing dyes, but the diimonium salt dye has poor compatibility with ordinary polyacrylate pressure-sensitive adhesives. After the two are mixed, the diimonium salt will gradually re-flocculate from the pressure-sensitive adhesive, resulting in phase separation, which is difficult to exist in a homogeneous phase. , affecting its visible light transmittance. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J133/10C08F220/18C08F220/28C08F220/06C08F220/56
Inventor 王益珂于名讯潘士兵邱桂花张瑞蓉赵均英孙芳兵张宝芹贾增民
Owner NO 53 RES INST OF CHINA NORTH IND GRP
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