Aqueous polyurethane dispersions and adhesives based thereon

Details Aqueous polyurethane dispersions and adhesives based thereon Aqueous polyurethane dispersions and adhesives based thereon

C - Chemistry, Metallurgy

09

J

400/7412

C09J 175/04 (2006.01) C08G 18/08 (2006.01) C08G 18/12 (2006.01) C08G 18/28 (2006.01) C08G 18/50 (2006.01) C08G 18/78 (2006.01) C08L 75/04 (2006.01) C09J 175/12 (2006.01)

Patent

CA 2023840

Mo3284 PU-365 AQUEOUS POLYURETHANE DISPERSIONS AND ADHESIVES BASED THEREON ABSTRACT OF THE DISCLOSURE The invention is related to an adhesive comprising a stable, fine particle size aqueous dispersion of polyurethane-urea which is the reaction product of an isocyanate-terminated prepolymer with an amine-containing chain extending agent which is characterized in that the functionality of said agent is about 2.05 to about 2.50. The adhesive was surprisingly and unexpectedly found to exhibit an increased softening point temperature as compared to the corresponding temperature of related adhesives which contains no such chain extending agent. Mo3284

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