Process for manufacturing high-resilient flexible urethan foams

Details Process for manufacturing high-resilient flexible urethan foams Process for manufacturing high-resilient flexible urethan foams

1976-02-10

1978-10-10

Ivy, C. Warren

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521137, 521904, C08G 1863, C08K 554

Patent

active

041195825

ABSTRACT:
A process for manufacturing high-resilient flexible urethan foams characterized by, reacting and foaming polyalkylene ether polyol and an organic polyisocyanate in the presence of a blowing agent, a surfactant and catalyst, (1) using as said polyalkylene ether polyol one which contains 2 to 10% by weight of a vinyl type polymer and in which its hydroxyl number ranges from 25 to 60 mg KOH/g, of its hydroxyl groups 20 to 70 mol% are primary hydroxyl groups and the remaining hydroxyl groups are secondary hydroxyl groups; (2) using as said organic polyisocyanate a mixture of tolylene diisocyanate with diphenylmethane diisocyanate or a crude diphenylmethane diisocyanate; and (3) using as said surfactant a mixture of a high-molecular-weight siloxane-oxyalkylene copolymer with a low-molecular-weight siloxane-oxyalkylene copolymer.

REFERENCES:
patent: 2834748 (1958-05-01), Bailey
patent: 3471465 (1969-10-01), Loen
patent: 3741917 (1973-06-01), Morehouse
"Niax Polyol 31-45, a Vinyl-Resin-Reinforced Polyol for Flexible Urethane Foam"; Union Carbide Corp.; published 1970; #F-41322A.

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