Hydrophilic polymers and contact lenses of high water content

Details Hydrophilic polymers and contact lenses of high water content Hydrophilic polymers and contact lenses of high water content

G - Physics

02

B

88/40, 400/9047,

G02B 1/04 (2006.01) C08F 226/06 (2006.01) C08L 39/00 (2006.01) G02C 7/04 (2006.01)

Patent

CA 1119737

HYDROPHILIC POLYMERS AND CONTACT LENSES OF HIGH WATER CONTENT ABSTRACT Cross-linked hydrophilic interpolymers and contact lenses made therefrom, comprising hydrophilic units of which the only or major proportion are derived from an N-vinyl heterocyclic monomer and allylic cross-linking units containing more than one polymerizable double bond selected-from monoallyl itaconate, diallyl itaconate, triallyl cyanurate, triallyl isocyanurate, triallyl trimellitate, N,N-diallylmelamine, multifunctional allyl monomers formed by the esterification of polybasic acids with allyl alcohol, or mixtures thereof; the proportions of said monomers being adjusted to give the desired water content and resistance to dissolution when the polymer is swollen to equilibrium in an aqueous environment.

318422

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