Process for producing phenolic foams with a uniform appearance

Details Process for producing phenolic foams with a uniform appearance Process for producing phenolic foams with a uniform appearance

C - Chemistry, Metallurgy

08

K

403/54

C08K 5/34 (2006.01) C08J 9/14 (2006.01) C08L 61/08 (2006.01)

Patent

CA 1117700

ABSTRACT OF THE DISCLOSURE Improved phenolic foams are produced having a more uniform cell structure, improved mechanical and thermal properties, and improved foam structure by foaming a phenol-aldehyde aligomer condensate such as a resole, an extended resole, or a mixture of a resole and a novolac resin in the presence of N-methyl-2-pyrrolidone.

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