Preparation method of alcohol-water type environment-friendly and safe composite adhesive

Abstract

The technical problem to be solved in the present invention is to provide an adhesive compounded by an environmentally friendly nontoxic alcohol solvent-based acrylate adhesive and an environmentally friendly nontoxic water-based polyurea adhesive, that is, a method for preparing an alcohol-water environmentally safe composite adhesive; the method includes the following steps A, the preparation of alcohol solvent acrylate adhesive composition; B, the preparation of water-based polyurea adhesive composition; Components and polyol additives are materials, and the weight percentages are: alcohol solvent, acrylate adhesive components account for 60%, water-based polyurea adhesive components account for 35%, polyol additives account for 5%; slowly add water-based polyurea adhesive components to alcohol In the solvent acrylate adhesive component, heat up to 70-80°C under stirring for 3 hours to react; add polyol additive glycerin and continue to react for 1 hour; cool to obtain the finished product.

Description

technical field [0001] The invention relates to the technical field of composite adhesives, in particular to a method for preparing an alcohol-water environment-friendly and safe composite adhesive. Background technique [0002] For a long time, due to the composite paste of the same or different plastic thin sheets (including films), such as plastic composite sheets or composite membranes for pharmaceutical packaging and food packaging, it has been difficult. In order to achieve the ideal bonding strength, the adhesives used are solvent-based non-environmental-friendly organic adhesives that contain toxicity and bad smell, such as toluene solvent-based or ethyl acetate solvent-based polyurethane or other organic resin adhesives. The environment of the finished product will cause relatively large environmental pollution and human injury. For this reason, people thought of developing environment-friendly nontoxic alcohol-based adhesives and water-based adhesives again, but w...

AI Technical Summary

Problems solved by technology

[0002] For a long time, due to the compound paste of the same or different plastic thin sheets (including films), such as plastic composite sheets or composite films used in pharmaceutical packaging and food packaging, it has been difficult

In order to achieve the ideal bonding strength, the adhesives used are solvent-based non-environmental-friendly organic adhesives that contain toxicity and bad smell, such as toluene solvent-based or ethyl acetate solvent-based polyurethane or other organic resin adhesives. The environment of the product will cause relatively large environmental pollution and human injury

For this reason, people thought of developing environment-friendly nontoxic alcohol-based adhesives and water-based adhesives again, but when using these two types of adhesives separately, their bonding strength is not enough, and there is also a defect for water-based adhesives, which is exactly Due to its high boiling point and high vaporization heat value, the water molecules used as the dispersion medium are difficult to volatilize and dry during baking and drying, and the high temperature is not good for plastic thin sheets (including films), which will cause thermal shrinkage deformation and damage.