Polyol compositions for producing rigid polyurethane foams

Details Polyol compositions for producing rigid polyurethane foams Polyol compositions for producing rigid polyurethane foams

1989-11-30

1993-07-06

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521131, 521170, 521174, C08G 1848

Patent

active

052254534

ABSTRACT:
A polyol composition for producing rigid polyurethane foams is disclosed which contains adducts of ethylene oxide or propylene oxide or both to resorcinol, catechol, cresorcinol or their homologues having two hydroxyls at the ortho or meta positions to each other, or adducts of ethylene oxide or propylene oxide or both to bisphenol A in combination with a second polyol and a low molecular weight glycol as a crosslinking agent.
The resultant rigid polyurethane foams have such a high heat resistance as to stand the use over a long period under high temperature circumstances.

REFERENCES:
patent: 4299924 (1981-11-01), Nomura et al.
patent: 4542165 (1985-09-01), Kumata et al.

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