Polyurethane-based thickeners for aqueous compositions

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...

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525409, 528 76, 528 77, 528 79, C08G 1812, C08G 1842

Patent

active

056124082

ABSTRACT:
The present invention relates to a process for the preparation of polyurethanes suitable for use as thickeners for aqueous compositions by reacting at an NCO/OH equivalent ratio of 0.9:1 to 1.2:1

REFERENCES:
patent: 3632780 (1968-01-01), Kuth et al.
patent: 4079028 (1978-03-01), Emmons et al.
patent: 4499233 (1985-02-01), Tetenbaum et al.
patent: 5023309 (1991-06-01), Kruse et al.
patent: 5378756 (1995-01-01), Thies et al.
patent: 5500475 (1996-03-01), Eicken et al.

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