Aqueous polyurethane dispersions and adhesives based thereon

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

1989-09-25

1992-06-23

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524839, 524840, 524871, 524874, 528 48, 528 60, 528 61, 528 68, 528 76, 528 80, C08L 7512, C08G 1832, C09J17512

Patent

active

051244004

ABSTRACT:
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.

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