Biodegradable expanded foam material
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United States of America Patent
Stats
-
Dec 21, 1993
Grant Date -
N/A
app pub date -
Nov 18, 1992
filing date -
Nov 18, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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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Family
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Cited Art Landscape
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