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Hydrophilized polydiorganosiloxane vinylic crosslinkers and uses thereof

  • US 10,246,543 B2
  • Filed: 08/23/2018
  • Issued: 04/02/2019
  • Est. Priority Date: 12/15/2015
  • Status: Active Grant
First Claim
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1. A silicone hydrogel contact lens comprising a crosslinked polymeric material which comprises:

  • units of a hydrophilized polydiorganosiloxane vinylic crosslinker which comprises (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and siloxane unit having one methyl substituent and one monovalent C4-C40 organic radical substituent having two to six hydroxyl groups, wherein the molar ratio of the hydrophilized siloxane units to the dimethylsiloxane units is from about 0.035 to about 0.15 and (2) two terminal (meth)acryloyl groups, wherein the polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 3000 Daltons to about 80,000 Daltons;

    units of a siloxane-containing vinylic monomer; and

    units of at least one hydrophilic vinylic monomer,wherein the silicone hydrogel contact lens, when being fully hydrated, has an oxygen permeability (Dk) of at least about 70 barrers, a water content of from about 25% to about 70% by weight, and an elastic modulus of from about 0.2 MPa to about 1.2 MPa.

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