Process for the manufacture of a flame resistant, insulating, en

Details Process for the manufacture of a flame resistant, insulating, en Process for the manufacture of a flame resistant, insulating, en

1976-06-16

1978-08-15

Welsh, M. J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

89 5, 264 458, 521116, 521181, C08J 914

Patent

active

041071077

ABSTRACT:
A high compressive strength phenolic resin foam is made by: adding between about 0.5 to 5.0 parts of a dual surfactant system and about 8 to 25 parts of a blowing agent, to 200 parts of a phenolic resole resin to form a pre-mix; agitating this pre-mix with about 20 to 70 parts of an aqueous dual sulfuric-phosphoric acid solution to provide a foaming phenolic material; immediately thereafter pouring or injecting the material into a mold or onto a suitable substrate, to provide a phenolic foam having a substantially uniform compressive strength of at least 40 psi. at between about 20% to 50% compression, at a deflection rate of between about 2 in./min. to about 5 in./min.

REFERENCES:
patent: 3389094 (1968-06-01), D'Alessandro
patent: 3639303 (1972-02-01), Penfold
patent: 3766100 (1973-10-01), Meyer-Stoll et al.
patent: 3865757 (1975-02-01), Wade
patent: 3870661 (1975-03-01), Crook et al.
patent: 3872033 (1975-03-01), Boden et al.
patent: 3885010 (1975-05-01), Bruning et al.
patent: 3998765 (1976-12-01), Novak et al.

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