Process for preparing biodegradable resin foam

Details Process for preparing biodegradable resin foam Process for preparing biodegradable resin foam

1993-08-13

1994-05-03

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

106122, 264 53, 521 79, 5211091, 521141, C08J 912

Patent

active

053088794

ABSTRACT:
A process for producing a biodegradable resin foam, having the steps of mixing a starch polymer containing from 5% by weight to 30% by weight of water, a vinyl alcohol resin containing from 5% by weight to 30% by weight of water, a nonionic surfactant, an inorganic or organic filler, and optionally a thickening agent; optionally adjusting the water content of the mixture, to prepare a composition having from 5% by weight to 30% by weight of water on the whole, based on total weight of the composition; melting and expanding it to prepare a foam, which has a low density and fine closed cells, and shows a good surface condition in a molded body.

REFERENCES:
patent: 4133784 (1979-01-01), Otey et al.
patent: 4377440 (1983-03-01), Gasland
patent: 4506037 (1985-03-01), Suzuki et al.
patent: 4863655 (1989-09-01), Lacourse et al.
patent: 5035930 (1991-07-01), Lacourse et al.
patent: 5042196 (1991-08-01), Lacourse et al.
patent: 5095054 (1992-03-01), Lay et al.
patent: 5153037 (1992-10-01), Altieri

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