Finnegan, Henderson, Farabow, Garrett & Dunner LLP
Method of preparing water-dispersible poly (urethane-urea) having aromatic-aliphatic isocyanate
The present invention relates to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, more particularly to a method of preparing water-dispersible poly (urethane-urea) having aliphatic-aromatic isocyanate, with improved mechanical/thermal properties, such as heat resistance, chemical resistance and adhesion, good cost competitiveness and environmental friendliness, by reacting polyester polyol, dimethylol propionic acid and an aromatic isocyanate compound to obtain a hydroxyl (OH)-terminated prepolymer, adding an aliphatic isocyanate compound to said OH-terminated prepolymer to obtain an isocyanate (NCO)-terminated prepolymer wherein aromatic-aliphatic isocyanate is hybridized, neutralizing, water-dispersing and chain extending said NCO-terminated prepolymer.
Yonsei University
C C C
C08G C08G C08G
inventional inventional inventional
Kyoung Min Jung Hyun In Woo
Ahn Kim Cheong