Improved method of forming shaped hydrogel articles including contact lenses using inert, displaceable diluents
    4.
    发明公开
    Improved method of forming shaped hydrogel articles including contact lenses using inert, displaceable diluents 失效
    用于生产水凝胶的制品,包括隐形眼镜,用惰性溶剂可更换的辅助下的改进方法。

    公开(公告)号:EP0642039A3

    公开(公告)日:1995-07-26

    申请号:EP94305394.2

    申请日:1994-07-21

    CPC classification number: G02B1/043 C08F2/00 Y10S524/916 C08L33/14

    Abstract: Shaped hydrogel articles such as soft contact lenses are prepared by the steps of:
    (1) molding or casting a polymerization mixture comprising:
    (a) a monomer mixture comprising a major proportion of one or more hydrophilic monomers such as 2-hydroxyethyl methacrylate, and one or more cross-linking monomers; and (b) an inert, displaceable diluent selected from the group consisting of:
    (i) ethoxylated alkyl glucoside; (ii) ethoxylated bisphenol A; (iii) polyethylene glycol; (iv) mixture of propoxylated and ethoxylated alkyl glucoside; (v) single phase mixture of ethoxylated or propoxylated alkyl glucoside and C₂₋₁₂ dihydric alcohol; (vi) adduct of ε-caprolactone and C₂₋₆alkanediols and triols; (vii) ethoxylated C₃₋₆alkanetriol; and (viii) mixtures of one or more of (i) through (vii), under conditions to polymerize said monomer mixture to produce a shaped gel of a copolymer of said monomers and said diluent; and (2) thereafter replacing said diluent with water.

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