Process for the preparation of aqueous polyurethane-polyurea dis

Details Process for the preparation of aqueous polyurethane-polyurea dis Process for the preparation of aqueous polyurethane-polyurea dis

1989-10-02

1991-08-13

Welsh, Maurice J.

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, C08L 7500

Patent

active

050397338

ABSTRACT:
The present invention is directed to a process for the preparation of stable polyurethane-polyurea dispersion in a multi-stage process by forming an isocyanate-terminated prepolymer having an ionic group content of up to about 50 milliequivalents per 100 g of prepolymer by reacting an organic polyisocyanate a) with at least two isocyanate-reactive components b1) and b2) wherein component (b1) has at least one ionic or potential ionic hydrophilic group, characterized in that

REFERENCES:
patent: 4108814 (1978-08-01), Reiff et al.
patent: 4110284 (1978-08-01), Violland et al.
patent: 4652466 (1987-03-01), Thomas et al.

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