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Preparation method of organosilicon modified polyacrylate pressure-sensitive adhesive and obtained pressure-sensitive adhesive

A technology of polyacrylate and butyl acrylate, which is used in the preparation of silicone-modified polyacrylate pressure-sensitive adhesives and silicone-modified polyacrylate pressure-sensitive adhesives, can solve the problems of complex process, low addition amount, and high addition amount. Many other problems, to achieve the effect of improving polymerization efficiency, good adhesion, and reducing residual glue

Active Publication Date: 2019-03-29
深圳市益达兴科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the invention patents disclosed above are commonly used methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, octamethylcyclotetrasiloxane, trimethoxysilane, Organosilane coupling agents such as tetramethoxysilane and silicone resins are used to modify polyacrylate pressure-sensitive adhesives, so there are still many deficiencies
For example, for organosilane coupling agent modified polyacrylate pressure sensitive adhesive, because organosilane coupling agent is easy to hydrolyze and condense, it is easy to generate cross-linking structure in the polymerization process and cause coagulation, adding a large amount will reduce the reaction system. Stability and adhesive performance of polyacrylate pressure-sensitive adhesives, if the amount added is small, the performance improvement of polyacrylate pressure-sensitive adhesives is not good
Silicone resin modified polyacrylate pressure sensitive adhesive is prone to microphase separation, and the bonding performance is not ideal
The process of the above method is complicated, the cost is high, and the adhesive performance of the obtained silicone-modified acrylate pressure-sensitive adhesive is not ideal, and the requirements for water resistance and weather resistance are not up to standard, so it is difficult to apply industrially

Method used

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  • Preparation method of organosilicon modified polyacrylate pressure-sensitive adhesive and obtained pressure-sensitive adhesive
  • Preparation method of organosilicon modified polyacrylate pressure-sensitive adhesive and obtained pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Prepare 2g SPS, 19g 2-ethylhexyl acrylate, 19g butyl acrylate, 5.5g methyl methacrylate, 2.5g hydroxypropyl acrylate, 2g acrylic acid, 0.2g dibenzoyl peroxide, 49.8 g ethyl acetate;

[0026] (2) Add SPS, 2-ethylhexyl acrylate, butyl acrylate, hydroxypropyl acrylate, acrylic acid and three-quarters of dibenzoyl peroxide into the monomer mixing kettle, and stir while feeding, Obtain mixed material A;

[0027] (3) Add one-third of the ethyl acetate into the reaction kettle, while stirring and raising the temperature to 82° C., then dropwise add the mixed material A to the reaction kettle, and finish dropping after 4 hours;

[0028] (4) Add methyl methacrylate into the reaction kettle, stir for 2 minutes, then add the remaining dibenzoyl peroxide and one-sixth of ethyl acetate, and react at a constant temperature of 82° C. for 2 hours;

[0029] (5) Lower the temperature of the reaction kettle to 40° C., add the remaining ethyl acetate, and discharge after stirring for...

Embodiment 2

[0031] (1) Prepare 6g SPS, 17g 2-ethylhexyl acrylate, 17g butyl acrylate, 5.5g methyl methacrylate, 2.5g hydroxypropyl acrylate, 2g acrylic acid, 0.5g dibenzoyl peroxide, 49.5 g ethyl acetate;

[0032] (2) Add SPS, 2-ethylhexyl acrylate, butyl acrylate, hydroxypropyl acrylate, acrylic acid and three-quarters of dibenzoyl peroxide into the monomer mixing kettle, and stir while feeding, Obtain mixed material A;

[0033] (3) Add one-third of the ethyl acetate into the reaction kettle, while stirring and raising the temperature to 82° C., then dropwise add the mixed material A to the reaction kettle, and finish dropping after 4 hours;

[0034] (4) Add methyl methacrylate into the reaction kettle, stir for 2 minutes, then add the remaining dibenzoyl peroxide and one-sixth of ethyl acetate, and react at a constant temperature of 82° C. for 2 hours;

[0035] (5) Lower the temperature of the reaction kettle to 40° C., add the remaining ethyl acetate, and discharge after stirring for...

Embodiment 3

[0037] (1) Prepare 10g SPS, 15g-2-ethylhexyl acrylate, 15g butyl acrylate, 5.5g methyl methacrylate, 2.5g hydroxypropyl acrylate, 2g acrylic acid, 0.8g dibenzoyl peroxide, 49.2 g ethyl acetate;

[0038] (2) Add SPS, 2-ethylhexyl acrylate, butyl acrylate, hydroxypropyl acrylate, acrylic acid and three-quarters of dibenzoyl peroxide into the monomer mixing kettle, and stir while feeding, Obtain mixed material A;

[0039] (3) Add one-third of the ethyl acetate into the reaction kettle, while stirring and raising the temperature to 82° C., then dropwise add the mixed material A to the reaction kettle, and finish dropping after 4 hours;

[0040] (4) Add methyl methacrylate into the reaction kettle, stir for 2 minutes, then add the remaining dibenzoyl peroxide and one-sixth of ethyl acetate, and react at a constant temperature of 82° C. for 2 hours;

[0041] (5) Lower the temperature of the reaction kettle to 40° C., add the remaining ethyl acetate, and discharge after stirring fo...

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Abstract

The invention relates to a preparation method of an organosilicon modified polyacrylate pressure-sensitive adhesive. The method includes: continuously adding a mixture of a single end double-bond terminated organosilicon polymer (SPS), 2-ethylhexyl acrylate and butyl acrylate that serve as acrylic soft monomers, an acrylic functional monomer and a part of an initiator dropwise for reaction, then adding methyl methacrylate serving as an acrylic hard monomer into a reaction kettle at one time, and then adding the remaining initiator into the reaction kettle at one time for further reaction. As the method provided by the invention adopts SPS, and employs the technology of first dropwise adding reaction and then adding of methyl methacrylate and the remaining initiator at one time for reaction, the prepared organosilicon modified polyacrylate pressure-sensitive adhesive can ensure certain peeling strength and reduce the peeling strength increase, and also has high temperature resistance.

Description

technical field [0001] The invention relates to the technical field of acrylate pressure-sensitive adhesives, in particular to a method for preparing an organosilicon-modified polyacrylate pressure-sensitive adhesive and the prepared organosilicon-modified polyacrylate pressure-sensitive adhesive. Background technique [0002] Acrylic pressure-sensitive adhesives are the most widely used pressure-sensitive adhesives at present. Compared with other types of pressure-sensitive adhesives, they have better weather resistance and durability without adding anti-aging agents, and have no phase separation and migration, and are transparent. Good sex. However, acrylate pressure-sensitive adhesives have insufficient cohesion and poor high-temperature resistance. Under high-temperature conditions, chain breaks are prone to occur, resulting in a smaller molecular structure, which leads to a greater increase in the peeling force between the pressure-sensitive adhesive and the adhesive su...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J183/07C08F283/12C08F220/18C08F220/14C08F220/20C08F220/06
CPCC08F283/124C09J133/066C08L83/04C08F220/1808
Inventor 樊勤海樊秋实胡文光
Owner 深圳市益达兴科技股份有限公司
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