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Thermal responsive, water-soluble polymers

  • US 6,765,081 B2
  • Filed: 05/02/2002
  • Issued: 07/20/2004
  • Est. Priority Date: 12/19/2001
  • Status: Active Grant
First Claim
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1. A thermal responsive, water soluble polymer which comprises the copolymerization product of:



  • 95 wt % of N-isopropyl acrylamide (NIP);

    0.1˜

    80 wt % of 1-vinyl-2-pyrrolidinone (VPD); and

    optionally 0.1˜

    30 wt % of acrylic acid (AA).

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