POLYURETHANE EMULSION COMPOSITIONS HAVING ACTIVE AMINO GROUP

摘要

Polyurethane emulsion compositions into which a functional group (active amino group) being effective in the reaction with a cross-linking agent is positively introduced are disclosed. The polyurethane emulsion compositions are obtained by dispersing in water and emulsifying a urethane prepolymer having an isocyanate group at molecular terminal, then adding a polyamine having at least two primary amino groups and at least one secondary amino group in the molecule to the system and allowing the system to react. When used with a cross-linking agent such as an epoxy cross-linking agent, the compositions exhibit significant improvements in their physical properties, such as strength, after just air drying.