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EP0109355A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Silicon-containing polymers having an increased oxygen permeability

Assignee: Novartis AG
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Filing: 1983-10-06
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Granted: —
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Expires: 2003-10-06
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Abstract

Abstract Translated from German Es werden klare, hochfeste, vernetzte Polymere beschrieben, die man durch Copolymerisation von (A) 8-70% eines linearen oder verzweigten Polysiloxans mit einem Molekulargewicht (MG) von 400-100 000, welches mindestens zwei end- oder seitenständige polymerisierbare Vinylgruppen auf je eine Polysiloxaneinheit mij MG 5 000 enthält, wobei diese Gruppen über mindestens zwei Urethan-, Thiourethan-, Harnstoff- oder Amidbindungen mit dem Polysiloxan verknüpft sind, und (B) 30-92% einer zu 85 bis 100% aus wasserunlöslichen Monomeren bestehenden Mono- oder Divinylverbindung oder eines Gemischs solcher Monomeren erhält. Diese Polymeren sind zur Herstellung harter oder weicher Kontaktlinsen verwendbar. Clear, high-strength, crosslinked polymers are described which are obtained by copolymerizing (A) 8-70% of a linear or branched polysiloxane with a molecular weight (MW) of 400-100,000, which has at least two terminal or pendant polymerizable vinyl groups on each contains a polysiloxane unit with a MW 5,000, these groups being linked to the polysiloxane via at least two urethane, thiourethane, urea or amide bonds, and (B) 30-92% of a mono consisting of 85 to 100% water-insoluble monomers or divinyl compound or a mixture of such monomers. These polymers can be used to make hard or soft contact lenses.

Inventors

  • 👤 Karl Friedrich Mueller
  • 👤 Sonia Jaworiw Heiber
  • 👤 Walter L. Plankl

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-24 21:18
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C08F290/00; C08F290/08; C08F290/14; C08F290/148; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/61; C08G18/67; C08G18/671; C08G18/672

Claims Analysis

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References Cited (Backward Citations)

US4260725A Cited
US4341889A Cited

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