Ophthalmic lenses

Details Ophthalmic lenses Ophthalmic lenses

G - Physics

02

B

G02B 1/04 (2006.01) C08J 5/00 (2006.01) C08L 67/07 (2006.01) C08L 69/00 (2006.01)

Patent

CA 2305196

The invention relates to an ophthalmic lens comprising the cured product of a composition comprising: - 60 to 99 wt % of a poly(allyl carbonate) of a polyhydroxy alcohol, said polyhydroxy alcohol having from 2 to 20 carbon atoms and from 2 to 6 hydroxy groups in the molecule: - 0.01 to 10 wt % of at least one radical initiator - 0 to 20 wt % of comonomers; and - a cyclohexyl diallyl ester oligomer in an amount of 0.05 to 60 wt %, having the formula I (see formula I) wherein X denotes a divalent hydrocarbon residue derived from a diol having 2 to 20 carbon atoms, optionally partly replaced by a residue derived from a polyol having 3 or more carbon atoms and 3 to 10 hydroxy groups, and n=1 to 100.

L'invention concerne un verre ophtalmique composé du produit durci d'une composition comprenant: a) 60 à 99 % en poids d'un poly(allyl-carbonate) d'un alcool polyhydroxy possédant 2 à 20 atomes de carbones et 2 à 6 groupes hydroxy dans la molécule, b) 0,01 à 10 % en poids d'au moins un initiateur de radicaux, c) 0 à 20 % en poids de comonomères, et d) 0,05 à 60 % en poids d'un oligomère d'un ester de cyclohexyl-diallyle, correspondant à la formule (I) dans laquelle X représente un reste d'hydrocarbure divalent, dérivé d'un diol possédant 2 à 20 atomes de carbone, le cas échéant partiellement remplacé par un reste dérivé d'un polyol possédant 3 atomes de carbone ou davantage et 3 à 10 groupes hydroxy, et n = 1-100.

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