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A preparation method of organosilicon-modified polyacrylate pressure-sensitive adhesive and the obtained pressure-sensitive adhesive

A technology of polyacrylate and butyl acrylate, which is applied in the field of preparation of silicone-modified polyacrylate pressure-sensitive adhesives and silicone-modified polyacrylate pressure-sensitive adhesives. Application and other issues, to achieve the effect of improving polymerization efficiency, reducing residual glue, and strong cohesion

Active Publication Date: 2021-02-26
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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  • A preparation method of organosilicon-modified polyacrylate pressure-sensitive adhesive and the obtained pressure-sensitive adhesive
  • A preparation method of organosilicon-modified polyacrylate pressure-sensitive adhesive and the 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

This application relates to a preparation method of silicone-modified polyacrylate pressure-sensitive adhesive. The mixture of butyl ester, acrylic acid functional monomer and a part of the initiator is continuously added dropwise for reaction. After the drop is completed, methyl methacrylate as acrylic acid hard monomer is added to the reactor at one time, and then the remaining part of the initiator is added to the reactor at one time. , continue the reaction. Since the present invention adopts SPS, and adopts the process of adding dropwise reaction first and then adding methyl methacrylate and the remaining initiator to react, the prepared silicone modified polyacrylate pressure-sensitive adhesive can guarantee a certain degree of peeling Strength while reducing the growth of peel strength, and 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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Patent Type & Authority Patents(China)
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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