Process for producing rigid polyurethane foam

Details Process for producing rigid polyurethane foam Process for producing rigid polyurethane foam

1976-02-03

1978-08-08

Ivy, C. Warren

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521167, C08G 1814, C08G 1850

Patent

active

041055993

ABSTRACT:
A process for producing a rigid polyurethane foam according to one-shot method which comprises reacting a polyol component with a polyfunctional isocyanate component in the presence of a polymerization catalyst, a foam stabilizer and a foaming agent, characterized in that said polyol component consists of 35 to 65 parts by weight of a sucrose polyether and 65 to 35 parts by weight of a polyoxyalkylene glycol of trihydroxyalkylamine and has an OH number of 420 to 530. According to this process, a rigid polyurethane foam having a very low density, low friability and excellent dimensional stability at low temperatures can be obtained.

REFERENCES:
patent: 3314902 (1967-04-01), Wismer
patent: 3424700 (1969-01-01), Booth
patent: 3471416 (1969-10-01), Fijal
patent: 3640997 (1972-02-01), Fijal
patent: 3746666 (1973-07-01), Neal
patent: 3763111 (1973-10-01), Fijal

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