Oxygen permeable hard and semi-hard contact lens...

Details Oxygen permeable hard and semi-hard contact lens... Oxygen permeable hard and semi-hard contact lens...

C - Chemistry, Metallurgy

08

F

402/9

C08F 230/08 (2006.01) C08F 220/10 (2006.01) C08F 222/10 (2006.01) C08F 226/10 (2006.01)

Patent

CA 1169187

IMPROVED OXYGEN PERMEABLE HARD AND SEMI-HARD CONTACT LENS COMPOSITIONS, METHODS AND ARTICLES OF MANUFACTURE ABSTRACT OF THE DISCLOSURE The invention relates to new monomers of a polysiloxanyl alkyl esters of acrylic and methacrylic acids and its copolymerization with alkyl esters of acrylic, methacrylic acids and/or itaconate esters to produce highly permeable contact lens material. The copolymer preferably includes a cross-linking agent and hydrophilic monomer. Contact lenses manufactured from the material are easily machined and polished into hard or semi-hard contact lenses having excellent dimensional stability.

391174

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