Title:
POLYMER FOR CONTACT LENSES
Document Type and Number:
WIPO Patent Application WO/2012/056195
Kind Code:
A3
Abstract:
The present invention relates to a polyurethane polymer composition prepared by reacting a mixture comprising: a} at least one polyethylene glycol, and either b) at least one poly-isocyanate, having a functionality greater than 2 or c) at least one di-isocyanate and at least one polyol or at least one macropolyol having a functionality greater than 2, wherein the polyol or macropolyol is present at an amount of 0.1 to 9 wt % of the mixture. The invention also relates to a process for preparing a polyurethane xerogel in the form of a moulded article, said process comprising the steps of: i.) preparing said mixture; ii. ) dispensing the reaction mixture formed in step i) into a mould; iii. ) allowing the reaction mixture to react and cure; iv. ) removing the moulded article from the mould; and v. ) hydrating the moulded article.
Inventors:
ABDUL RASHID (GB)
BONNETTE GRAHAM NEIL (GB)
BONNETTE GRAHAM NEIL (GB)
Application Number:
PCT/GB2011/001527
Publication Date:
September 27, 2012
Filing Date:
October 24, 2011
Export Citation:
Assignee:
OCUTEC LTD (GB)
ABDUL RASHID (GB)
BONNETTE GRAHAM NEIL (GB)
ABDUL RASHID (GB)
BONNETTE GRAHAM NEIL (GB)
International Classes:
C08G18/10; C08G18/12; C08G18/48; G02B1/04
Foreign References:
| US6930196B2 | 2005-08-16 | |||
| US5175229A | 1992-12-29 | |||
| FR2539135A1 | 1984-07-13 | |||
| US20030199644A1 | 2003-10-23 | |||
| US3322568A | 1967-05-30 |
Attorney, Agent or Firm:
MCNALLY, Roisin (3 Clark WayBellshill Industrial Estate, Bellshill ML4 3NX, GB)
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