Nonflammable light foams containing urea and urethane groups in

Details Nonflammable light foams containing urea and urethane groups in Nonflammable light foams containing urea and urethane groups in

1982-03-22

1983-09-13

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521109, 521172, C08G 1814

Patent

active

044042949

ABSTRACT:
Light foams containing urea and urethane groups and having a density of at most 0.025 g/cc are produced by reacting a polyisocyanate with at least one equivalent of water in which mono- and/or oligo-saccharides have been dissolved (as blowing agent) in the presence of organic compounds containing at least two hydroxyl groups and having an OH number of from 30 to 250, a catalyst and a flameproofing agent. Chain extending agents having a molecular weight of from 32 to 62 and other known auxiliaries and additives may also be used. The foams thus produced are nonflammable and are particularly useful in insulation applications.

REFERENCES:
patent: 4291129 (1981-09-01), Kennedy

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