Anhydride modified acrylate pressure-sensitive adhesive and preparation method thereof

A pressure-sensitive adhesive and acrylate technology, applied in the field of pressure-sensitive adhesives, can solve the problems of adverse side reactions, incomplete reaction, weak cross-linking reaction bonding force, etc., and achieves high cross-linking reaction efficiency and enhances the effect of cohesion.

Inactive Publication Date: 2019-02-19
佛山市顺德区永创翔亿电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When polyfunctional isocyanate and hydroxyl functional group crosslinking reaction, the reaction conditions are strict, afraid of moisture environment, easy to produce many adverse side effects
The crosslinking reaction between metal salts and carboxyl functional groups is weak, usually the reaction is incomplete, and metal pollution is easy to occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, which is an anhydride-modified acrylate pressure-sensitive adhesive, is prepared by the following steps: 40 parts of isooctyl acrylate (EHA), 10 parts of ethyl acrylate, 15 parts of butyl acrylate (BA), 3 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA), 3 parts of acrylonitrile, 0.01 part of free radical initiator peroxide After mixing tert-butyl maleate (TBMA), 0.1 part of ferric chloride, 0.2 part of triphenylphosphine and 100 parts of toluene, deoxygenate with nitrogen gas for 60 minutes, then control the temperature at 90 °C, under nitrogen protection Carry out reverse atom transfer radical polymerization (R-ARTP) polymerization reaction for 10 hours, the number average molecular weight (Mn) is controlled to 376900, the molecular weight polydispersity coefficient is controlled to 1.4, the reaction temperature is lowered to 30 ° C, and then 2 parts of epoxy are added The acid anhydride modified Non-toxic ac...

Embodiment 2

[0023] Embodiment 2, which is an anhydride-modified acrylate pressure-sensitive adhesive, is prepared by the following steps: 40 parts of isooctyl acrylate (EHA), 10 parts of stearyl acrylate (SA), 5 parts butyl acrylate (BA), 5 parts of 4-methacryloxyethyl trimellitic anhydride (4-META), 4 parts of methyl acrylate (MMA), 2 parts of isobornyl methacrylate, 0.04 parts After mixing the free radical initiator dibenzoyl peroxide (BPO), 0.1 part of copper bromide, 0.2 part of pentamethyldiethylenetriamine and 80 parts of ethyl acetate, nitrogen deoxygenation was performed for 90 minutes, The temperature was controlled at 80°C, and the reverse atom transfer radical polymerization (R-ARTP) polymerization reaction was carried out under nitrogen protection for 24 hours. The number average molecular weight (Mn) was controlled to 321400, the molecular weight polydispersity coefficient was controlled to 1.3, and the reaction temperature was reduced 25° C., add 1 part of epoxidized m-xylyl...

Embodiment 3

[0024] Example 3, which is an anhydride-modified acrylate pressure-sensitive adhesive, prepared by the following steps: 50 parts of isooctyl acrylate (EHA), 10 parts of ethyl acrylate (EA), 15 parts of Butyl acrylate (BA), 5 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 2 parts of methyl acrylate (MMA), 2 parts of cyclohexyl methacrylate, 0.06 parts After mixing the free radical initiator dibenzoyl peroxide (BPO), 0.1 part of ferric chloride, 0.2 part of triphenylphosphine and 70 parts of ethyl acetate, nitrogen deoxygenation was carried out for 120 minutes, and the temperature was controlled At 85°C, reverse atom transfer radical polymerization (R-ARTP) polymerization reaction was carried out under nitrogen protection for 20 hours, the number average molecular weight (Mn) was controlled to 265400, the molecular weight polydispersity coefficient was controlled to 1.2, and the reaction temperature was lowered to 20°C , and then add 1 part of trimethylolpropane...

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Abstract

The invention relates to the field of pressure-sensitive adhesives, in particular to an anhydride modified acrylate pressure-sensitive adhesive and a preparation method thereof. The anhydride modifiedacrylate pressure-sensitive adhesive comprises 1-80 parts of low-transition-temperature acrylate monomer, 1-40 parts of high-transition-temperature acrylate monomer, 1-20 parts of anhydride functional monomer, 20-200 parts of organic solvent, 0.001-1 part of free radical initiator, 0.1-1 part of reverse atom transfer free radical polymerization catalyst, 0.1-1 part of curing promoter and 0.1-10 parts of multifunctional epoxy crosslinking agent. The anhydride modified adhesive narrow in molecular weight distribution and uniform in structure is obtained by adopting a reverse atom transfer freeradical polymerization method for polymerization, and the multifunctional epoxy crosslinking agent is added for crosslinking, so that cohesion is improved, the novel acrylate pressure-sensitive adhesive is obtained, and cohesion of the adhesive is improved effectively. By the adhesive, the problem that conventional pressure-sensitive adhesives are wide in molecular weight distribution is solved, and the defect that the conventional pressure-sensitive adhesives are less prone to degumming and insufficient in heat resistance.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesives, in particular to acid anhydride-modified acrylate pressure-sensitive adhesives and a preparation method thereof. Background technique [0002] Polyacrylate pressure-sensitive adhesive refers to the acrylate glue prepared by free radical polymerization of monomers with unsaturated double bonds under the action of initiators. Polyacrylate pressure-sensitive adhesive has good weather resistance and can be prepared into various pressure-sensitive adhesive tapes. Acrylic pressure-sensitive adhesive is currently the most widely used pressure-sensitive adhesive. It has good transparency, excellent weather resistance and heat resistance, no phase separation and migration, and is especially suitable for the field of electronic machinery manufacturing. Acrylic pressure-sensitive adhesives usually cannot be used alone because they are prone to debonding or ghosting due to their insufficient cohe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J11/08C08F220/18C08F220/30C08F220/14C08F220/44C08F212/08
CPCC09J11/06C09J11/08C09J133/08C08F220/18C08F220/1808C08L15/00C08F220/1804C08F220/302C08F220/14C08F220/1806C08F220/1818C08F220/1811C08F220/1802C08F220/1812C08F212/08C08F220/44
Inventor 叶志斌曾丽娟
Owner 佛山市顺德区永创翔亿电子材料有限公司
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