Phenol-formaldehyde foams

Details Phenol-formaldehyde foams Phenol-formaldehyde foams

C - Chemistry, Metallurgy

08

K

403/54

C08K 5/17 (2006.01) C08G 8/10 (2006.01) C08G 14/06 (2006.01) C08G 14/08 (2006.01) C08J 9/14 (2006.01) C08L 61/06 (2006.01) C08L 61/10 (2006.01)

Patent

CA 1107450

ABSTRACT OF THE DISCLOSURE A two component system, and method for its preparation, from which a phenol-formaldehyde resin foam may be prepared, which system comprises in a first component a phenol-formaldehyde resin, a blowing agent which is an inert, low boiling liquid, an effective amount of a nitrogenous modifier capable of per- mitting dispersion of the blowing agent in the resin, and a sur- factant; and in a second component an acid catalyst system dis- persed in a liquid polyhydroxy compound, in a weight ratio of polyhydroxy compound to acid catalyst of at least 1:1. These systems enable simpler handling and placement techniques being shelf storable, compared to the known shelf storable systems which involve three, or more, components. The foams provided by these systems find use as insulating materials, for example in buildings.

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