Biodegradable expanded foam material

Details Biodegradable expanded foam material Biodegradable expanded foam material

1992-11-18

1993-12-21

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

106122, 5211091, 521149, 527313, C08J 912

Patent

active

052721817

ABSTRACT:
Expanded foam materials having a high degree of biodegradability are prepared by combining a starch-graft copolymer (SGC) with grain based starch containing materials and 15-25% water and expanding the mixture either with or without blowing agents. The mixture of SGC and grain based material is directly expanded at elevated temperature with an extruder or other expansion means. The product may be customized for particular applications by manipulating the particular grafted monomer, manipulating the ratio of SGC to grain based material and/or by the addition of nucleators, blowing agents, plasticizers or other additives, and/or by varying moisture content and the conditions of expansion.

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