Polymer compositions for contact lenses

Details Polymer compositions for contact lenses Polymer compositions for contact lenses

C - Chemistry, Metallurgy

08

F

C08F 220/54 (2006.01) C08F 220/28 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2150673

Copolymers useful as a contact lens material are prepared from a mixture comprising: (a) an N,N-dialkyl(meth)acrylamide monomer; and (b) a monomer represented by formula (I) wherein: R1 is methyl or hydrogen; R2 is -O- or-NH-; R3 and R4 are independently a divalent radical selected from the group consisting of -CH2- -CHOH- and -CHR6-; R5 and R6 are independently a branched C3-C8 alkyl group; and n is an integer of at least 1, and m and p are independently 0 or an integer of at least 1, provided that the sum of m, p and n is 2, 3, 4 or 5.

Copolymères utiles comme constituants pour verres de contact, préparés à partir d'un mélange renfermant : a) un monomère de N,N-dialkyl(méth)acrylamide; b) un monomère représenté par la formule (I), où R1 est un méthyle ou un hydrogène; R2 est -O- ou -NH-; R3 et R4 sont indépendamment l'un de l'autre CH2-, -CHOH- ou -CHR6-; R5 et R6 sont indépendamment l'un de l'autre un alkyle C3-C8 ramifié; n est un entier d'au moins 1, m et p sont indépendamment l'un de l'autre 0 ou un entier d'au moins 1, à la condition que la somme de m, p et n soit 2, 3, 4 ou 5.

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