Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1977-01-21
1978-01-17
Foelak, Morton
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 294R, 260 39SB, C08V 930
Patent
active
040691756
ABSTRACT:
Method of producing a dimensionally stabilized urea-formaldehyde foam which comprises preparing a neutral concentrated partially cured aqueous urea-formaldehyde resin, combining said neutral resin with a froth produced by forcing air through a dilute acidic aqueous surfactant solution to activate the urea-formaldehyde foam cure, immediately thereafter combining the curing urea-formaldehyde foam with a substantially non-ionic liquid additive containing dissolved urea and suspended linearly shaped refractory solid particles, completing the acid catalyzed foam cure, and drying. Foam dimensional stability is maximized when the non-ionic liquid additive contains 10-20% by weight dissolved urea and 10-20% by weight suspended attapulgite clay.
REFERENCES:
patent: 2273367 (1942-02-01), Meyer
patent: 2947647 (1960-08-01), Hart et al.
patent: 3457199 (1969-07-01), Wells
Foelak Morton
Waverly Chemical Co.
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