Oxygen permeable hard and semi-hard contact lens compositions, m

Details Oxygen permeable hard and semi-hard contact lens compositions, m Oxygen permeable hard and semi-hard contact lens compositions, m

1979-08-13

1980-12-30

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

351160H, 526279, C08F22028

Patent

active

042424836

ABSTRACT:
The invention relates to new monomers of polysiloxanyl alkyl esters of acrylic and methacrylic acids and their copolymerization with alkyl esters of acrylic, methacrylic acids and/or itaconate esters to produce highly permeable contact lens material. The copolymers preferably include 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: 4152508 (1979-05-01), Ellis et al.

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