Amino resin foam, one-phase solution foam precursor and method o

Details Amino resin foam, one-phase solution foam precursor and method o Amino resin foam, one-phase solution foam precursor and method o

1978-10-27

1980-03-11

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 65, 521131, 521187, 521188, 521913, 528254, 528259, C08J 930

Patent

active

041929233

ABSTRACT:
Amino resin foams of the urea-formaldehyde or urea-melamine-formaldehyde type formed from a one-phase solution of methylene chloride solvent, propylene glycol co-solvent, catalyst and polymer precursors which may be urea and formaldehyde or urea, melamine and formaldehyde. As reaction occurs between the polymer precursors in the solution, the methylene chloride in the solution vaporizes foaming the resin. In the product foam, the propylene glycol acts as a plasticizer and the methylene chloride as the blowing agent in a closed-cell foam having superior stability and insulative properties. The product foam is useful in building insulation and for other insulative purposes.

REFERENCES:
patent: 3793161 (1968-07-01), Avis

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