Urea-formaldehyde polymers having reduced formaldehyde emission

Details Urea-formaldehyde polymers having reduced formaldehyde emission Urea-formaldehyde polymers having reduced formaldehyde emission

1980-04-08

1981-06-16

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, 528261, 528265, C08J 930

Patent

active

042738830

ABSTRACT:
Urea-formaldehyde polymers having reduced formaldehyde emissions are produced by incorporating in the prepolymer an aromatic substance incapable of reacting with urea formaldehyde in alkaline media but capable of reacting with urea formaldehyde in acid media in an amount sufficient to reduce or eliminate the free formaldehyde emissions therefrom. Also disclosed is a cellular urea-formaldehyde foam which is resistant to acid-induced hydrolysis, the foam prepared by incorporating a polyalkyl polynuclear metal sulfonate foaming agent in the acid catalyst solution for the urea-formaldehyde prepolymer.

REFERENCES:
patent: 3160596 (1964-12-01), Spencer
patent: 3231363 (1966-01-01), Renner
patent: 3631134 (1971-12-01), Scheuermann et al.
patent: 4208487 (1980-06-01), Wang et al.

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