Phenol-formaldehyde based urethane foams

Details Phenol-formaldehyde based urethane foams Phenol-formaldehyde based urethane foams

1984-10-19

1986-02-04

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521136, 521137, 525456, C08J 908, C08J 910

Patent

active

045687048

ABSTRACT:
A process for the preparation of improved closed cell foams having improved toughness and improved stability to light by the reaction of a urethane polyol or an amide polyol with a liquid phenol-formaldehyde polyol and a polyisocyanate is described.

REFERENCES:
patent: 3271331 (1966-09-01), Ender
patent: 4260530 (1981-04-01), Reischl et al.
patent: 4461852 (1984-07-01), Nakamura et al.
patent: 4520141 (1985-05-01), Kumasaka et al.

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