Phenolic foam composition and use thereof for "in place" foaming

Details Phenolic foam composition and use thereof for "in place" foaming Phenolic foam composition and use thereof for "in place" foaming

1994-10-25

1995-07-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 94, 521158, 521163, 521164, 521181, C08J 908, C08G 1404

Patent

active

054322073

ABSTRACT:
A process for the manufacture of a foamed product in which a reactive phenolic resin is mixed with urea and an isocyanate, and this mixture is then mixed with an acid catalyst. The phenolic resin polymerizes, thereby liberating water and formaldehyde. The water reacts with the isocyanate to liberate carbon dioxide and the formaldehyde reacts with the urea. As the phenolic resin polymerizes, it traps the carbon dioxide in bubbles, thereby forming a foamed product.

REFERENCES:
patent: 4427797 (1984-01-01), Smith
patent: 4579876 (1986-04-01), Illiopulos

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