Prepn of water-base composite acrylic adhesive

Abstract

The water-base composite acrylic adhesive is prepared through first pre-emulsifying partial deionized water, partial emulsifier and partial reaction monomer to obtain the pre-emulsion I; pre-emulsifying the rest deionized water, emulsifier and reaction monomer to obtain the pre-emulsion II; adding partial initiator to the pre-emulsion II for emulsion polymerization to prepare seed, adding molecular weight regulator, dropping the pre-emulsion I, adding rest initiator, and controlling the pH value in the required range to complete the reaction and to obtain the water-base composite acrylic adhesive. The preparation process has low emulsifier consumption and stable emulsion reaction, and the product has high stability and high adhesion strength, and may be used in the adhesion of plastic film and aluminum film.

Description

technical field

[0001] The invention belongs to the technical field of adhesives for plastic film compounding of food packaging bags, and in particular relates to a preparation method of emulsion polymerization water-based acrylic adhesives. Background technique

[0002] For a long time, the adhesives used for compounding food packaging bags have all used organic solvent-based adhesives, which are toxic to the environment and the human body. The water-based composite adhesive uses water as a solvent, which is completely non-toxic and harmless. It is an environmentally friendly adhesive and is very suitable for the compounding of food packaging materials. The main advantages of water-based composite adhesives are: (1) There will be no solvent residue in the composite film, and the odor of residual solvent in packaging materials will be reduced; (2) No solvent recovery device is required, which is conducive to the sanitation of the working environment in the factory; (3) There...