Method of preparing phenolaldehyde foamed plastics

Details Method of preparing phenolaldehyde foamed plastics Method of preparing phenolaldehyde foamed plastics

1974-10-03

1976-12-21

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 49, 260 57A, 260 72R, 260838, C08J 928

Patent

active

039987655

ABSTRACT:
A method of preparing a phenolaldehyde foamed plastic which involves mixing (1) a phenolaldehyde oligomer, such as a resol-type resin, or a mixture of such a resol-type resin with a novolac-type resin, (2) an acidic catalyst, such as an oligomeric product obtained by the treatment of an aromatic sulphoacid with formaldehyde, or an oligomeric product obtained by the treatment of an aromatic sulphoacid with formaldehyde and a nitrogen-containing compound, such as urea, aniline, and 4.4-diaminodiphenolmethane, (3) a compound of a complex-forming metal, such as cobalt, magnesium, manganese, vanadium, chromium, nickel, copper, iron, titanium, and lead, in the form of its oxide, hydroxide, salt, or mixtures thereof, (4) a surfactant, and (5) a foaming agent. The resulting mixture is foamed and cured at a temperature up to 100.degree. C. Introduction of the complex-forming metal insures improved water-resistance of the resulting foamed plastic.

REFERENCES:
patent: 2089813 (1937-08-01), Rice
patent: 3813356 (1974-05-01), Lievremont et al.
patent: 3830894 (1974-08-01), Juenger et al.
patent: 3872033 (1975-03-01), Boden et al.
Hackh's Chem. Dict., McGraw-Hill Book Co., New York, 4ed., 1969.

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