Medium and high viscosity emulsion type acrylic ester pressure-sensitive adhesive used for protective films, preparation method and application thereof

Abstract

The invention relates to a medium and high viscosity emulsion type acrylic ester pressure-sensitive adhesive used for protective films, a preparation method and application thereof. According to the scheme provided by the invention, a polyacrylic ester emulsion synthesized by adopting a pre-emulsification semi-continuous polymerization process is adopted by using acrylic acid-2-ethyl hexyl acrylate, butyl acrylate, butyl methacrylate, methyl acrylate, vinyl acetate, 2-hydroxypropyl acrylate, 2-hydroxyethyl acrylate, acrylic acid, an inner cross-linking agent, a latent curing agent and a chaintransferring agent. The obtained emulsion type acrylic ester pressure-sensitive adhesive is relatively high in solid content, few in gel, high in stability, high in peel strength and high in originaladhesion, has excellent damp-heat aging resistance, is a single-component adhesive, can be directly used, and can be prepared into various materials of protective films such as pitted fluorocarbon profiles, aluminum-plastic composite panels and plastic profile protective films.

Description

technical field [0001] The invention relates to an emulsion pressure-sensitive adhesive for surface protection film, in particular to an emulsion-type acrylate pressure-sensitive adhesive for surface protection film of pitted fluorocarbon profiles, aluminum-plastic composite panels and plastic profiles. Background technique [0002] Protective film is a protective and packaging material used to protect the surface of goods from pollution, scratches and oxidation during manufacturing, transportation, secondary processing, storage, and use. Profiles are one of the most widely used protective film products. There are many types of profiles, including fluorocarbon profiles, aluminum profiles, plastic profiles, etc. Different types of profiles have different surface energies and different types of protection requirements. [0003] Fluorocarbon spraying is to spray a layer of polyvinylidene fluoride resin nCH on the surface of the profile 2 CF 2 The coating made of aluminum as t...

AI Technical Summary

Problems solved by technology

[0003] Fluorocarbon spraying is to spray a layer of polyvinylidene fluoride resin nCH on the surface of the profile 2 CF 2 The coating made of aluminum powder as the base material or with metal aluminum powder as the colorant has a stable chemical structure, which makes the surface energy low, and the metal particles in the sprayed coating cause the surface to be rough and uneven, so that the product will protect the surface when it leaves the factory. The film has extremely high requirements, and ordinary protective films cannot stick to its surface. Although the protective film made by increasing the amount of pressure-sensitive adhesive can stick to its surface, it is very easy to cause large-scale degumming (especially in summer), resulting in product quality accidents

At present, such products on the market are directly wound and packaged with wrapping paper or polyethylene film. This packaging method is extremely unsightly and easily causes scratches and damages on the product surface during product transportation and post-processing, which greatly reduces the product grade

Some of the existing patents or literature have been researched on pressure-sensitive adhesives for fluorocarbon profile surface protection films, such as Feng Xiaoping’s "Preparation of Emulsion Pressure-Sensitive Adhesives for Fluorocarbon Profile Protection Films", which only targets a single fluorocarbon profile Profiles, pressure-sensitive adhesive applications are narrow

Chinese Invention Patent CN102234496A discloses "An Emulsion Pressure Sensitive Adhesive for Surface Protection Film and Its Preparation Method and Application", which mentions a two-component emulsion pressure sensitive adhesive for the protective film of fluorocarbon profiles , which is complicated to use and not easy to store

[0004] At present, the pressure-sensitive adhesive used for the protective film of fluorocarbon profiles in the domestic market has small initial adhesion, small peeling force, and poor adhesion to fluorocarbon profiles.