합성피혁용 수분산 폴리우레탄의 물성과 응용

Abstract

Application and Properties of Water Based Polyurethane for Synthetic Leather *

By

Seung-Yeol Lee Department of Industrial Chemistry Graduate School of Industry Pukyung National University

Abstract

Waterborne resins can be classified as polymers with ionic stabilization (self-emulsifying binders)or external emulsifiers. The "core-shell" emulsions of the self-emulsifying polymer generation give excellent results in the industrial coating field. The methods of synthesis are polycondensation, polyaddition, polymerization or combinations of themselves. By these method resins with very low VOC-values are obtained. These resins can be alkyds, acrylics, epoxies, polyurethanes or combinations of themselves. they are used as binders in top coats and primers (air-drying or stoving) for metal, plastics or wood in different industrial areas. Polyurethane dispersions ( PUD) show very good properties in coatings for plastic materials, even by low temperatures as -25°C (-13°F) as required in the car industry. 2-Component epoxy-polyamine sytems give outstanding results on metal, concrete and plastics. The main technological and ecological advantages are remarkable chemical and mechanical characteristics, field-proven application properties, noninflammability, interesting recycling possibilities and biodegradability.