Oxygen permeable hard and semi-hard contact lens compositions me

Details Oxygen permeable hard and semi-hard contact lens compositions me Oxygen permeable hard and semi-hard contact lens compositions me

1979-09-04

1981-12-01

Wong, Jr., Harry

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

351160R, 351160H, 526264, C08F22026, G02C 704

Patent

active

043037720

ABSTRACT:
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.

REFERENCES:
patent: 4056496 (1977-11-01), Mancini et al.
patent: 4120570 (1978-10-01), Gaylord
patent: 4139513 (1979-02-01), Tanaka et al.
patent: 4139692 (1979-02-01), Tanaka et al.

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