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Melt processable starch compositions

  • US 7,524,379 B2
  • Filed: 12/17/2003
  • Issued: 04/28/2009
  • Est. Priority Date: 03/08/1999
  • Status: Expired due to Fees
First Claim
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1. A composition comprising:

  • (a) from about 50 wt % to about 70 wt % of a starch, wherein the starch has a weight-average molecular weight ranging from about 1,000 to about 2,000,000; and

    (b) from about 30 wt % to about 50 wt % of water; and

    (c) a high polymer selected from the group consisting of;

    polyacrylamide and its derivatives;

    polyacrylic acid, polymethacrylic acid, and their esters;

    polyvinyl alcohol;

    polvethyleneimine;

    copolymers made from mixtures of monomers of the aforementioned polymer; and

    mixtures thereof;

    wherein the composition has a melt shear viscosity in the range of about 0.1 to about 40 Pa·

    s.

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