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Acrylic-ester hot-melt pressure-sensitive adhesive and preparing method thereof

A technology of hot-melt pressure-sensitive adhesive and acrylate, which is applied in the direction of adhesives, ester copolymer adhesives, adhesive types, etc., and can solve the problems of affecting the aging resistance of pressure-sensitive adhesives, easy degumming, and high volume shrinkage , to achieve the effect of solving the problem of residual migration, not easy to glue transfer, and small volume shrinkage

Active Publication Date: 2016-05-18
KUNSHAN JIUQING PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above UV-cured pressure-sensitive adhesives have obvious technical defects. The main problem is that these UV-cured acrylate pressure-sensitive adhesive systems all use prepolymers or monomers containing unsaturated double bonds, adding additional photoinitiated agent monomer for cross-linking and curing
Before UV curing, due to the presence of a large number of unsaturated functional groups in the adhesive of the acrylate pressure-sensitive adhesive system, it is easy to self-polymerize when heated or exposed to light, and the storage stability is poor; when UV curing, the conversion rate of unsaturated monomers is generally not high. Residual unsaturated monomers have a strong odor; a large number of unsaturated double bonds in the adhesive have a high volume shrinkage when UV-cured into a network structure, resulting in poor adhesion of the pressure-sensitive adhesive layer to the coated substrate and prone to degumming ; After UV curing is completed, the remaining photoinitiator fragments will migrate and affect the aging resistance of the pressure-sensitive adhesive; the special odor and toxicity of the added photoinitiator limit the application of such UV-cured pressure-sensitive adhesives in medical and food Applications in areas such as direct or indirect contact

Method used

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  • Acrylic-ester hot-melt pressure-sensitive adhesive and preparing method thereof
  • Acrylic-ester hot-melt pressure-sensitive adhesive and preparing method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] 2 parts by weight of methyl acrylate, 95 parts of butyl acrylate, 2 parts of hydroxyethyl acrylate, 1 part of ABP, 0.2 parts of azobisiso Butyronitrile and 0.01 parts by weight of dodecyl mercaptan were added into a three-necked flask, stirred at a constant speed for 15 minutes, and a mixed solution was prepared for use.

[0029] Add 5% of the above mixed solution into a three-neck flask equipped with a stirrer, thermometer, reflux condenser and dropping funnel, stir slowly, raise the temperature to 88°C for 0.5h, and then add the remaining 95% dropwise in 6-8h The mixed solution can be kept for 1 hour after the dropwise addition, and then packaged and discharged.

Embodiment 2

[0031] The parts by weight are 5 parts of methyl methacrylate, 90 parts of acrylate-2-ethylhexyl, 3 parts of methacrylic acid, 2 parts of AEBP, 0.2 parts by weight of Azobisisobutyronitrile and 0.01 part by weight of dodecylmercaptan were added into a three-necked flask, stirred at a constant speed for 15 minutes, and a mixed solution was prepared for use.

[0032] Add 5% of the above mixed solution into a three-neck flask equipped with a stirrer, thermometer, reflux condenser and dropping funnel, stir slowly, raise the temperature to 88°C for 0.5h, and then add the remaining 95% dropwise in 6-8h The mixed solution can be kept for 1 hour after the dropwise addition, and then packaged and discharged.

Embodiment 3

[0034] 8 parts by weight of acrylamide, 84 parts by weight of ethyl acrylate, 5 parts by weight of hydroxypropyl methacrylate, 3 parts by weight of AHBP, 0.2 parts by weight of azobis Add isobutyronitrile and 0.01 parts by weight of dodecyl mercaptan into a three-necked flask, stir at a constant speed for 15 minutes, and prepare a mixed solution for use.

[0035] Add 5% of the above mixed solution into a three-neck flask equipped with a stirrer, thermometer, reflux condenser and dropping funnel, stir slowly, raise the temperature to 88°C for 0.5h, and then add the remaining 95% dropwise in 6-8h The mixed solution can be kept for 1 hour after the dropwise addition, and then packaged and discharged.

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Abstract

The invention discloses an acrylic-ester hot-melt pressure-sensitive adhesive and a preparing method thereof. The acrylic-ester hot-melt pressure-sensitive adhesive comprises, by weight, 1-10 parts of hard monomer, 70-95 parts of soft monomer, 1-5 parts of functional monomer, 1-5 parts of polymerizable UV photoinitiator, 0.2-0.5 part of free radical polymerization initiator and 0.01-0.1 part of molecular weight modifier. According to the acrylic-ester hot-melt pressure-sensitive adhesive, storage stability and weather resistance can be improved, the size shrinkage is small during cure crosslinking, coated base material adhesive force is large, adhesive shifting is not prone to occurrence, and the acrylic-ester hot-melt pressure-sensitive adhesive can be widely applied to the food contact field and the medical field. In addition, the body polymerization technology is adopted and is different from the conventional solution polymerization technology and the conventional emulsion polymerization technology, the amount of residual monomer in macromolecule prepolymers is quite small, the content of solid of a polymerization product is 100%, solvent discharging and water volatilization are avoided in the coating process of the pressure-sensitive adhesive, energy consumption is low, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to an acrylate hot-melt pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Hot-melt pressure-sensitive adhesives generally refer to pressure-sensitive adhesives whose main components are thermoplastic elastomers, tackifying resins, plasticizers and antioxidants. Among them, thermoplastic elastomer mainly refers to block copolymers such as SIS, SBS, SEBS, etc., tackifying resin mainly refers to rosin resin, C5 petroleum resin, C9 petroleum resin or C5 / C9 copolymerized petroleum resin, and plasticizer mainly includes naphthenic oil , white oil and low molecular weight polyisobutylene, etc. Compared with solvent-based acrylic pressure-sensitive adhesives and emulsion-type acrylic pressure-sensitive adhesives, hot-melt pressure-sensitive adhesives have no solvent and water discharge during the coating process, and t...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J7/02C08F220/18C08F220/14C08F220/28C08F220/30C08F220/06C08F220/56
CPCC08F220/18C08F220/1804C08F220/1806C09J7/255C09J133/08C09J2301/122C09J2301/302C09J2433/00C08F220/56C08F220/281C08F220/302C08F220/14C08F220/06C08F220/301
Inventor 何敏瞿平刘钊
Owner KUNSHAN JIUQING PLASTIC
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