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Cellulose acetate and starch based biodegradable injection molded plastics compositions and methods of manufacture

  • US 5,288,318 A
  • Filed: 07/01/1993
  • Issued: 02/22/1994
  • Est. Priority Date: 07/01/1993
  • Status: Expired due to Fees
First Claim
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1. A biodegradable plastic comprising:

  • between about 10% to 60% by weight starch which contains more than 3% intact starch granules;

    between 30% to 70% cellulose acetate which has a molecular weight ranging from 28,000 to 62,000 Daltons and a viscosity of 3 to 44 seconds; and

    between 5% and 35% of a plasticizer selected from the group consisting of triacetin, diacetin, monoacetin, ethylene glycol, propylene glycol and glycerol.

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