Improved itaconate copolymeric compositions for contact lenses

Details Improved itaconate copolymeric compositions for contact lenses Improved itaconate copolymeric compositions for contact lenses

C - Chemistry, Metallurgy

08

F

C08F 283/12 (2006.01) C08F 222/10 (2006.01) C08F 230/08 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2159327

Copolymers useful as contact lens materials are the polymerization product Image (I)of a mixture comprising: (a) an itaconate; (b) a compound represented by formula (I), wherein each A is independently an activated unsaturated radical; each R is independently selected from the group consisting of a C1-C12 monovalent hydrocarbon radical, a C1-C12 monovalent hydrocarbon radical containing ether linkages, a halogen-substituted C1-C12 monovalent hydrocarbon radical, and a halogen-substituted C1-C12 monovalent hydrocarbon radical containing ether linkages; each R' is independently a C1-C22 divalent hydrocarbon radical; and n averages about 15 to about 50; (c) an ethylenically unsaturated organoxiloxane monomer; and (d) a hydrophilic monomer.

L'invention concerne des copolymères utiles en tant que matériaux pour lentilles de contact qui sont le produit de la polymérisation d'un mélange constitué: (a) d'un itaconate; (b) d'un composé représenté par la formule (I), dans laquelle chaque A représente indépendamment un radical insaturé activé; chaque R est choisi indépendamment dans le groupe comprenant un radical d'hydrocarbure monovalent C1-C12, un radical d'hydrocarbure monovalent C1-C12 contenant des liaisons éther, un radical d'hydrocarbure monovalent C1-C12 à substitution halogène, et un radical d'hydrocarbure monovalent C1-C12 à substitution halogène contenant des liaisons éther; chaque R' représente indépendamment un radical d'hydrocarbure divalent C1-C22; et n correspond à un entier de 15 à 50; (c) d'un monomère d'organosiloxane éthylénique insaturé; et (d) d'un monomère hydrophile.

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