Manufacture of non-CFC cellular resol foams using perflurinated

Details Manufacture of non-CFC cellular resol foams using perflurinated Manufacture of non-CFC cellular resol foams using perflurinated

1998-03-31

1998-10-06

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 88, 521114, C08J 914

Patent

active

058177060

ABSTRACT:
The invention relates to a process for producing non-CFC resol foams of low density using perfluorinated ethers along with a HCFC or CFC blowing agent, and to foams produced by such a process. The process generally comprises: (a) forming a mixture by combining a resol resin with a blowing-agent blend comprising (i) at least one blowing agent selected from the group consisting of hydrogenated chlorofluorocarbons and hydrogenated fluorocarbons and (ii) at least one perfluoroether additive selected from the group consisting of peiurinated ethers; (b) adding an acid catalyst to the mixture to initiate foaming and form a foam; and (c) curing the foam to form a cured foam that is essentially free of CFCs.

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