Method of producing polyester foams using borohydride...

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

C - Chemistry, Metallurgy

08

J

403/57

C08J 9/06 (2006.01)

Patent

CA 1209300

ABSTRACT OF THE DISCLOSURE A method of making a foamed, polyester resin comprises mixing a liquid unsaturated polyester composi- tion, 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 substan- tially non-reactive with the borohydride salt. The re- sulting 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 ad- mixed therewith. In this case a foamed, gelled and cured resin results. The borohydride complexes are usefully quaternary amine borohydrides.

443119

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