Plasticizer-migration-resistant water-based pressure-sensitive adhesive and preparation method thereof

Abstract

The invention relates to the technical field of adhesives, and discloses a plasticizer-migration-resistant water-based pressure-sensitive adhesive and a preparation method of the plasticizer-migration-resistant water-based pressure-sensitive adhesive. The adhesive comprises the following components 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 a pH regulator, 1-15 parts of a plasticizer, 1-15 parts of deionized water, 1-40 parts of water-based tackifying resin, 0.01-3 parts of a wetting agent and 0.1-1 part of an antibacterial agent. The aqueous pressure-sensitive adhesive is resistant to plasticizer migration and provides lasting, excellent initial adhesion, high peel strength and persistent adhesionwhen used on a soft polyvinyl chloride substrate. The preparation method comprises the following steps of: mixing the block copolymer and the natural rubber emulsion, adjusting the pH value, adding the plasticizer and the deionized water, mixing, standing, and adding the water-based tackifying resin and other assistants to obtain the water-based pressure-sensitive adhesive. The preparation methodhas the advantages of simple process operation, no need of heating, low overall cost and easy realization of industrial 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...

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

Images