Fog-resistant aqueous pressure-sensitive adhesive and polyethylene protection film containing same

Abstract

The invention discloses a fog-resistant aqueous pressure-sensitive adhesive for a polyethylene protection film. The adhesive is prepared by using the manner of seeded emulsion polymerization. According to the invention, seeded emulsion is prepared at first, then pre-emulsion is added into the seeded emulsion drop by drop, the seeded emulsion and the pre-emulsion fully react by replenishing an initiator, cooling and pH value adjusting are carried out, and a discharged material is filtered. The invention also provides a polyethylene protection film containing the fog-resistant aqueous pressure-sensitive adhesive and a preparation method thereof. Through adjusting utilization amount of a cross-linking agent and gelatinizing content, an appropriate peeling strength of the emulsion pressure-sensitive adhesive prepared in the invention can be obtained; the prepared protection film has good fog resistance when applied on sheet materials like steel plates and titanium plates.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a pressure-sensitive adhesive for polyethylene protective film and a polyethylene protective film containing the pressure-sensitive adhesive. Background technique [0002] The protective film is a film-like material used to protect the surface of goods. It is mainly made of polyolefin film as the base material and rubber or acrylate polymer as the pressure-sensitive adhesive, which is coated and dried. Paste it on the surface of various metals, aluminum-plastic panels, plastic sheets, coated steel, stainless steel, titanium plates, aluminum profiles, stone, glass, instruments, furniture, etc. Protects surfaces during processing, storage and use, preventing contamination, scratching and slowing oxidation of product surfaces. The application of protective film can not only improve the appearance quality of products and facilitate material processing, but also improve t...

AI Technical Summary

Problems solved by technology

[0004] The enhancement of environmental protection awareness has led to the rapid development of water-based pressure-sensitive adhesives. However, due to the use of a large number of hydrophilic emulsifiers or protective colloids in general acrylic emulsion pressure-sensitive adhesives, the protective film is used to protect other products. When materials, especially stainless steel and titanium plates, are subjected to high temperature environments or have not been torn off for a long time, there will be obvious fogging problems (that is, there is obvious color difference between the place where the protective film is pasted and the part that is not pasted), which will cause pollution to the surface of the material , and even lead to the scrapping of materials, resulting in huge losses

[0005] There are patents on water-based pressure-sensitive adhesives related to surface protection films, such as "Peelable Emulsion Pressure-Sensitive Adhesive and Pressure-Sensitive Adhesive Sheet" (Patent Publication No. CN1517422A) describes the composition and preparation of a peelable emulsion PSA method, which includes an acrylate emulsion polymer and an external crosslinking agent containing a water-dispersible polyisocyanate, but the reaction of the water-dispersible polyisocyanate with water in the emulsion reduces the crosslinking efficiency, thereby reducing the non-fogging performance, and also leads to The pot life of the glue is significantly shortened

"Preparation Method of Emulsion Pressure Sensitive Adhesive for Moisture and Heat Resistance Surface Protection Film and Surface Protection Film" (Patent Publication No. CN200710018641.X) describes a kind of emulsion pressure sensitive adhesive for moisture and heat resistance protection film, but still uses more in its preparation process The non-reactive emulsifier, the risk of fogging on the titanium plate and mirror plate is still relatively large

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