Reactive polyurethanes

Details Reactive polyurethanes Reactive polyurethanes

1993-06-15

1994-10-18

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521160, 521161, 521164, 521167, 528 45, C08G 1800

Patent

active

053569458

ABSTRACT:
The present invention relates to polyurethanes with softening temperatures above 80.degree. C. which are NCO-free, which are reactive via masked isocyanates, which are essentially linear and extensively pre-lengthened, and their preparation. The polyurethanes can be used as powders which can be processed like thermoplastics and post-cured.

REFERENCES:
patent: 3819586 (1974-05-01), Rudolph et al.
patent: 4044171 (1977-08-01), Muller et al.
patent: 4150211 (1979-04-01), Muller et al.
R. Pfriender, Kunststoffe 76 (1986), 10, p. 960 et seq.
Dr. M. Wachsmann, Kunststoffberater, Oct. 1987, pp. 27-28 (English Translation Attached).

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