Process for the continuous production of aqueous polyurethane di

Details Process for the continuous production of aqueous polyurethane di Process for the continuous production of aqueous polyurethane di

1988-09-08

1989-08-15

Ivy, C. Warren

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523324, 523340, 524591, 524840, C08L 7504

Patent

active

048575658

ABSTRACT:
The present invention is directed to a continuous process for the production of aqueous polyurethane dispersions by continuously mixing solutions of polyurethanes or isocyanate prepolymers dissolved in an organic solvent with water and subsequently continuously removing at least a portion of the solvent using a circulation-type evaporator. The present invention is also directed to the production of coatings or adhesives by applying the aqueous polyurethane dispersions to a substrate.

REFERENCES:
patent: 3036998 (1962-05-01), Rudner
patent: 3388087 (1968-06-01), Dieterich et al.
patent: 3479310 (1969-11-01), Dieterich et al.
patent: 3480592 (1969-11-01), Dieterich et al.
patent: 3686108 (1972-08-01), Reiff et al.
patent: 3756992 (1973-09-01), Dieterich
patent: 4086193 (1978-04-01), Reischl
patent: 4108814 (1978-08-01), Reiff et al.
Angewandte Chemie 82, p. 53, 1970.
Angew. Makromolekulare Chemie, 1972.
Ullmanns, p. 24, lines 21-22.

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