Stable dispersions of polyhydrazodicarbonamides useful in the pr

Details Stable dispersions of polyhydrazodicarbonamides useful in the pr Stable dispersions of polyhydrazodicarbonamides useful in the pr

1990-01-23

1994-08-30

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 99, 521152, 521167, 524589, 524590, 524599, 524612, 524714, C08J 900

Patent

active

053428552

ABSTRACT:
This invention relates to a process for the preparation of stable dispersions of hydroxyl-containing polyhydrazodicarbonamides in a hydroxyl-containing compound. The dispersions are prepared by the reaction of organic isocyanates, isocyanate-reactive compounds having a molecular weight in the range from 400 to 10,000, relatively low molecular weight isocyanate-reactive compounds, and hydrazines or hydrazides. This invention further relates to the dispersions prepared by said process, the use of the dispersions to prepare polyurethane foams having exceptional hardness, and the foams prepared thereby.

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