METHOD OF PREPARING POLYMER MATERIAL FOR FLEXIBLE CONTACT LENS Russian patent published in 2002 - IPC

Abstract RU 2187515 C2

FIELD: polymer materials. SUBSTANCE: polymer material for hydrogel contact lens is prepared by radical synthesis, in particular copolymerization of 50-80% N- vinylpyrrolidone, 10-40% 2-hydroxyethyl methacrylate, 5-15% methyl methacrylate in presence of 0.005 to 5% cross-linking agent, more specifically bifunctional methacrylic acid derivatives, and 0.01 to 1% radical (co)polymerization initiator, more specifically azodiisobobutyronitrile. Reaction is carried out utilizing 72-h heating from 30 C to 130 C according to exponential low. EFFECT: improved physico-mechanical properties of material in hydrated state. 2 cl, 1 tbl, 5 ex

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RU 2 187 515 C2

Authors

Sirik E.V.

Dates

2002-08-20Published

2000-08-28Filed