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Thermoplastic silicone-containing hydrogels

  • US 5,969,076 A
  • Filed: 05/15/1998
  • Issued: 10/19/1999
  • Est. Priority Date: 05/15/1998
  • Status: Expired due to Term
First Claim
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1. A thermoplastic polymer including units of the formula:

  • ##STR6## wherein M is a hydrophilic radical derived from a hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000;

    each R is independently selected from an alkylene group having 1 to 10 carbon atoms wherein the carbon atoms may include ether, urethane or ureido linkages therebetween;

    each R'"'"' is independently selected from hydrogen, monovalent hydrocarbon radicals or halogen substituted monovalent hydrocarbon radicals wherein the hydrocarbon radicals have 1 to 18 carbon atoms which may include ether linkages therebetween;

    a is an integer equal to or greater than 1;

    each Z is independently a divalent urethane or ureido segment;

    and x is greater than or equal to 1, and y is greater than or equal to 1.

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