Method of producing a urea formaldehyde combination foam with a

Details Method of producing a urea formaldehyde combination foam with a Method of producing a urea formaldehyde combination foam with a

1983-04-28

1984-12-18

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521121, 521188, 528259, 528260, C08J 930

Patent

active

044891750

ABSTRACT:
To obtain a UF foam which is low in formaldehyde, yet is dimensionally stable, up to 96% urea is dissolved in an approximately 10 to 30% aqueous extract of an alkyl, aryl or alkaryl sulphonic acid, said solution being mixed with a conventional hardener/foaming agent solution containing the sodium salt of an alkyl, aryl or alkaryl sulphonic acid in an aqueous diluent usually employed for foaming, in a ratio sulphonic acid solution to sodium sulphonate solution of 1:1 to 1:4, the pH value being adjusted to 0 up to 3 and said mixture being foamed together with a urea formaldehyde resin precondensate solution in the usual manner.

REFERENCES:
patent: 2559891 (1951-07-01), Meyer
patent: 3231525 (1966-01-01), Kelly et al.
patent: 4092277 (1978-05-01), Moore
patent: 4225680 (1980-09-01), Williams

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