×

Novel Polymers

  • US 20080015315A1
  • Filed: 07/10/2007
  • Published: 01/17/2008
  • Est. Priority Date: 07/12/2006
  • Status: Active Grant
First Claim
Patent Images

1. An actinically crosslinkable prepolymer that is obtained by:

  • (a) copolymerizing a polymerizable mixture to obtain a copolymer with first functional groups, wherein the polymerizable mixture comprises a first hydrophilic monomer, at least one polysiloxane-containing crosslinker, a chain transfer agent having a first functional group, a second hydrophilic monomer; and

    (b) reacting an organic compound with the copolymerization product to form the crosslinkable prepolymer having ethylenically unsaturated groups, wherein the organic compound comprises an ethylenically unsaturated group and a second functional group, wherein the second functional group of the organic compound reacts with one of the first functional groups of the copolymerization product, wherein the second hydrophilic monomer is present in an amount sufficient to produce the resultant prepolymer which, after purification, can be crosslined actinically or thermally to form a silicone hydrogel material, wherein the silicone hydrogel material having a reduced amount of non-volatile extractables.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×