METHOD FOR PRODUCING WATER-BASED POLYURETHANE EMULSION, AND ADHESIVE

摘要

Provided is a method for producing a water-based polyurethane emulsion, which simultaneously solves the problems of hydrolysis resistance and offensive odors that are inherent to water-based polyurethane emulsions. Also provided is an adhesive. The method for producing a water-based polyurethane emulsion entails neutralizing a urethane polymer with a first tertiary amine, and subsequently performing chain extension and water dispersion. The method also has a step in which a second tertiary amine having weaker basic properties than the first tertiary amine is added to the emulsion dispersed in water, and an alkali metal base is subsequently added.