Process for the manufacture of foamed plastics with improved com

Details Process for the manufacture of foamed plastics with improved com Process for the manufacture of foamed plastics with improved com

1979-01-04

1979-11-27

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521121, 521126, 521127, 521129, 521130, 521137, 521187, 521188, C08J 900

Patent

active

041762177

ABSTRACT:
Production of foamed plastics with improved combustion characteristics by condensing aqueous solutions of aminoplast precondensates with at least bifunctional organic isocyanate whereby an acid curing catalyst and an accelerator for polyurethane formation is used. For performing the condensation, the aqueous solution of the precondensate is added to the mixture of isocyanate and the accelerator at the same time as but separately from the acid curing catalyst.

REFERENCES:
patent: 2806006 (1957-09-01), Proctor
patent: 3632531 (1972-01-01), Rush

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