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A kind of modified acrylate pressure-sensitive adhesive prepolymer and its preparation method and application

A technology of acrylate and butyl acrylate, applied in the field of modified acrylate pressure-sensitive adhesive prepolymer and its preparation, can solve the problems of corrosion of substrates, low cost and energy consumption, residual glue, etc., and achieves environmental resistance Good properties, fast curing speed and excellent peeling performance

Active Publication Date: 2019-12-13
东莞市贝特利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent Application No. 201080022965.0 discloses a UV radiation-curable pressure-sensitive acrylic adhesive that can be applied at greater thicknesses and still achieve acceptable UV curing; however, the isocyanate-modified hydroxyl polymer it uses The hot-melt UV pressure-sensitive adhesive prepared by the method cannot meet the process of pressure-sensitive adhesive in the traditional sense.
The Chinese patent with the publication number CN104592903A discloses a UV-curable acrylate pressure-sensitive adhesive with a solid content of 100% and a coating thickness of 30 microns, which can achieve the performance of common solvent-based pressure-sensitive adhesives, with less coating amount, low cost and energy consumption. Low consumption; however, it uses simple free radical polymerization to add acrylic acid, which seriously affects the environmental resistance of pressure-sensitive adhesives, easily causing residual glue, corrosion of substrates, etc.

Method used

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  • A kind of modified acrylate pressure-sensitive adhesive prepolymer and its preparation method and application
  • A kind of modified acrylate pressure-sensitive adhesive prepolymer and its preparation method and application
  • A kind of modified acrylate pressure-sensitive adhesive prepolymer and its preparation method and application

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preparation example Construction

[0039] The present invention also provides a preparation method of a modified acrylate pressure-sensitive adhesive prepolymer, comprising the following steps:

[0040] a) Mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, glycidyl methacrylate, solvent and thermal initiator to obtain a reaction raw material mixture; the thermal initiator is selected from azobisisobutyronitrile , benzoyl peroxide or di-tert-butyl peroxide;

[0041] b) performing a prepolymerization reaction on the reaction raw material mixture obtained in step a), and then performing a polymerization reaction to obtain a reaction product of the structure shown in formula (II);

[0042]

[0043] c) reacting the reaction product obtained in step b) with acrylic acid, a catalyst and a polymerization inhibitor, then adding a diluent and carrying out vacuum distillation to obtain a modified acrylic pressure-sensitive adhesive prepolymer having a structure shown in formula (I) ; The diluent is selected...

Embodiment 1

[0082] (1) Add 30g butyl acrylate, 50g isooctyl acrylate, 10g hydroxyethyl acrylate, 10g glycidyl methacrylate, 100g A mixed solvent of toluene and ethyl acetate (1:1) and 0.8 g of azobisisobutyronitrile (AIBN) were mixed uniformly to obtain 195 g of reaction raw material mixture;

[0083] (2) Take one-third of the above-mentioned reaction raw material mixture and add it to the reaction kettle, turn on the stirring, raise the temperature to 80°C for 1.5h, then add one-third of the above-mentioned reaction raw material mixture, and react at the same temperature 1.5h, then add the remaining one-third of the above-mentioned reaction raw material mixture, react at the same temperature for 1.5h, adjust the temperature to 105°C for 8h after the reaction, and obtain the reaction product of the structure shown in formula (II);

[0084]

[0085] (3) Cool to room temperature, protect with nitrogen, then add 3.1g of acrylic acid, 0.1g of catalyst triphenylphosphine, 0.03g of polymeriz...

Embodiment 2

[0090] (1) Add 30g butyl acrylate, 50g isooctyl acrylate, 10g hydroxyethyl acrylate, 10g glycidyl methacrylate, 100g A mixed solvent of toluene and ethyl acetate (1:1) and 0.8 g of benzoyl peroxide (BPO) were mixed uniformly to obtain 196 g of reaction raw material mixture;

[0091] (2) Take one-third of the above-mentioned reaction raw material mixture and add it to the reaction kettle, turn on the stirring, raise the temperature to 90°C for 1.5h, then add one-third of the above-mentioned reaction raw material mixture, and react at the same temperature 1.5h, then add the remaining one-third of the above-mentioned reaction raw material mixture, react at the same temperature for 1.5h, adjust the temperature to 100°C for 8h after the reaction, and obtain the reaction product of the structure shown in formula (II);

[0092] (3) Cool to room temperature, protect with nitrogen, then add 3.1g of acrylic acid, 0.1g of catalyst tertiary amine (hexamethylenetetramine), 0.03g of polymer...

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Abstract

The invention provides modified acrylate pressure-sensitive adhesive prepolymer and a preparation method and application thereof. The modified acrylate pressure-sensitive adhesive prepolymer has a structure shown in a formula (I). According to the modified acrylate pressure-sensitive adhesive prepolymer and the preparation method and application thereof, a framework structure with the characteristic of pressure-sensitive adhesive is prepared by adopting free radical copolymerization, meanwhile, hydroxyl and epoxy groups are introduced, and the copolymer, eg., the modified acrylate pressure-sensitive adhesive prepolymer, with the performance of photo curing is prepared through acrylation of the epoxy groups; solvent is replaced by a specific diluent through vacuum distillation, so that theprepared prepolymer is solvent-free, and the modified acrylate pressure-sensitive adhesive prepolymer has the advantages of being good in pressure-sensitive and ultraviolet light curing property, andby adding specific content of photo-cured resin, the reactive diluent, a photoinitiator and assistants, the photo-cured pressure-sensitive adhesive which has the advantages of high curing speed, excellent peeling performance and good environment resistance performance can be obtained.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a modified acrylic pressure-sensitive adhesive prepolymer and its preparation method and application. Background technique [0002] Protective film pressure-sensitive adhesive is to apply the adhesive to the protective film by roller coating, which is realized by heat or ultraviolet light. Generally speaking, heat-cured pressure-sensitive adhesives are divided into acrylate type, silicone type, and polyurethane type. These pressure-sensitive adhesives all contain solvents and need to be cured by adding corresponding curing agents; in addition, the above-mentioned pressure-sensitive adhesives The glue also needs to be cured to achieve good performance, and the curing time is generally 3 to 7 days. Therefore, solvent-based pressure-sensitive adhesives have brought great pressure to the environment on the one hand, and restricted their application fields on the other hand. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/20C08F220/32C09J133/08
CPCC08F220/18C08F220/1808C09J133/068C08F220/1804C08F220/20C08F220/325
Inventor 周传玉雷学春杨美宾胡彬陶林华夏小华黄火轮
Owner 东莞市贝特利新材料有限公司
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