Method of producing polyester foams using borohydride dispersion

Details Method of producing polyester foams using borohydride dispersion Method of producing polyester foams using borohydride dispersion

1984-05-04

1985-04-30

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521138, 521910, C08J 906

Patent

active

045145237

ABSTRACT:
A method of making a foamed, polyester resin comprises mixing a liquid unsaturated polyester composition, with a liquid borohydride blowing agent which is a liquid borohydride complex, a borohydride complex in organic liquid medium or a borohydride salt dispersed in an organic liquid medium, which medium is at least substantially non-reactive with the borohydride salt. The resulting mixture is permitted to foam and gel under the initial influence of the blowing agent. In one embodiment the liquid unsaturated polyester includes a peroxide as a curing agent and an amine promoter is additionally admixed therewith. In this case a foamed, gelled and cured resin results. The borohydride complexes are usefully quaternary amine borohydrides.

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