A water-based pressure-sensitive adhesive resistant to plasticizer migration and preparation method thereof

A technology resistant to plasticizers and pressure-sensitive adhesives, which is applied in the direction of adhesives, adhesive types, rosin adhesives, etc., and can solve problems such as degradation of polymer mechanical properties, difficulty in providing pressure-sensitive properties, and cohesive failure of the adhesive layer. , to achieve the effects of low overall cost, excellent weather resistance, and reduced processing costs

Active Publication Date: 2022-04-29
英创新材料(绍兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In CN 101376796A, due to the preparation of water-based primer, primer is the transition layer of traditional SPVC pressure-sensitive adhesive to improve the adhesion of pressure-sensitive adhesive layer, so high oil-resistant monomers can be selected, such as acrylonitrile, ethyl acrylate and methyl acrylate Ester, etc., the emulsion mainly composed of such monomers has good DOP resistance performance but is difficult to provide good pressure-sensitive performance, and in the technology disclosed in CN101372607A, it needs to use a large amount of butyl acrylate or acrylic acid in order to obtain good pressure-sensitive adhesive performance Soft monomers such as isooctyl ester, which are not resistant to DOP in conventional acrylate random copolymers, under the impact of high DOP mass concentration, the mechanical properties of the polymer will be greatly reduced, especially in some high temperature situations Under the condition, the cohesive failure of the adhesive layer is prone to occur, resulting in degumming

Method used

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  • A water-based pressure-sensitive adhesive resistant to plasticizer migration and preparation method thereof
  • A water-based pressure-sensitive adhesive resistant to plasticizer migration and preparation method thereof
  • A water-based pressure-sensitive adhesive resistant to plasticizer migration and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0046] Preparation of Block Copolymer BC-1 Latex

[0047] Wherein the parts by weight of monomers and other raw materials, and the product molecular weight are shown in Table 1 below.

[0048] Table 1

[0049]

[0050] Add 2 parts by weight of DR reagent and 30 parts by weight of water into the reactor, mix and stir for 30 minutes until completely dissolved, then add 10 parts by weight of styrene and 2.5 parts by weight of acrylonitrile, raise the temperature to 90 degrees, and blow in nitrogen, Drop into 2 parts by weight of ammonium persulfate, after 120 minutes of insulation, add 45 parts by weight of butyl acrylate, 15 parts by weight of ethyl acrylate, 5 parts by weight of acrylic acid, 5 parts by weight of hydroxyethyl acrylate, 5 parts by weight of Acrylonitrile, 0.2 parts by weight of ethylene glycol dimethacrylate, and 95 parts by weight of water are dropped into the reactor together to continue the reaction for 240 minutes, and finally the styrene of 10 parts by ...

Embodiment 1～3 and comparative example 1～2

[0057] The preparation of water-based pressure-sensitive adhesive, the weight ratio and type of each raw material are summarized in Table 3.

[0058] (1) Stir and mix the block copolymers BC-1 and BC-2 prepared in the above steps and the natural rubber emulsion at 300 rpm, add a pH regulator to adjust the pH value of the latex at 8 to 9, and stir until the pH value Stablize;

[0059] (2) Add plasticizer and deionized water dropwise to the latex of step (1), place 24h after stirring for 120 minutes at 600 rpm;

[0060] (3) Add water-based tackifying resin, wetting agent and antibacterial agent to the latex after step (2) standing still, and stir and mix at 600 rpm for 60 minutes to obtain the water-based pressure-sensitive adhesive.

[0061] Table 3 Raw materials and proportions for preparing water-based pressure-sensitive adhesives

[0062]

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Abstract

The invention relates to the technical field of adhesives, and discloses a water-based pressure-sensitive adhesive resistant to plasticizer migration and a preparation method thereof. The water-based pressure-sensitive adhesive comprises, in parts by weight: 20-60 parts of a block copolymer, 1 ~20 parts of natural rubber emulsion or styrene-butadiene latex, 0.1~2 parts of pH regulator, 1~15 parts of plasticizer, 1~15 parts of deionized water, 1~40 parts of water-based tackifying resin, 0.01 ~3 parts of wetting agent, 0.1~1 part of antibacterial agent; the water-based pressure-sensitive adhesive can resist plasticizer migration and provide long-lasting, excellent initial tack and high peel strength when used on soft PVC substrates And stay sticky. The preparation method is to adjust the pH value after mixing the block copolymer and the natural rubber emulsion, add a plasticizer and deionized water to mix and let stand, then add water-based tackifying resin and other auxiliary agents to obtain the water-based pressure-sensitive adhesive of the present invention, The preparation method has the advantages of simple process operation, no heating, low overall cost and easy realization of industrialized production.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a water-based pressure-sensitive adhesive resistant to plasticizer migration and a preparation method thereof. Background technique [0002] The pressure-sensitive tape based on soft polyvinyl chloride (SPVC) film is widely used in industries such as automobiles, home appliances, decoration and advertising due to its excellent flame retardancy, aging resistance and electrical insulation. At present, the soft PVC pressure-sensitive tape mainly uses solvent-based rubber pressure-sensitive adhesives. Solvent-type pressure-sensitive adhesives have high VOC emissions, which will pollute the environment. With the new "Coatings, inks and adhesives The Industrial Air Pollutant Emission Standard was promulgated, and soft PVC pressure-sensitive adhesives will face an urgent need to replace oil with water. [0003] The biggest problem with the pressure-sensitive adhesive based on soft po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/00C09J107/02C09J193/04C09J11/00C08F293/00
CPCC09J153/00C09J11/00C08F293/005C08L2205/03C08F2438/03C08L93/04C08L7/02
Inventor 罗英武吴荣生张天可
Owner 英创新材料(绍兴)有限公司
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