Method of producing rigid foams and products produced therefrom

Details Method of producing rigid foams and products produced therefrom Method of producing rigid foams and products produced therefrom

1993-09-16

1994-08-30

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521155, 521170, 521174, 521902, 521159, C08G 1818, C08G 1822, C08J 908

Patent

active

053428595

ABSTRACT:
In a method of producing a polyurethane modified polyisocyanurate foam, at least one alkali metal organo-salt catalyst is utilized in an aqueous solution free of aliphatic glycols. The catalyst preferably contains more chemical equivalents of at least one carboxylic acid than chemical equivalents of at least one alkali metal hydroxide dissolved in water. The use of extra or undissolved carboxylic acid, preferably 2-ethyl-hexoic acid, advantageously creates flame resistant amides, as well as creating carbon dioxide as a blowing agent. The use of extra or undissolved carboxylic acid can also reduce the water content of catalysts of the present invention which might have a water content in excess of the desired.

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N. Malwitz, P. A. Manis, S. W. Wong and K. C. Frisch, "Amine Catalysis of Polyurethane Foams" Annual Polyurethane Conference-Oct. 15-17-1986-pp. 338-353.

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