Silicone-containing hard contact lens material

Details Silicone-containing hard contact lens material Silicone-containing hard contact lens material

1978-02-15

1979-05-01

Lilling, Herbert J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264 1, 351160H, 526 73, 526218, 526259, 526264, 526273, 526278, 526923, C08F 3008, C08F23008, C08F 404, B29D 1100

Patent

active

041525086

ABSTRACT:
An improved contact lens material is formed by a copolymer of a siloxanyl alkyl ester monomer, an itaconate ester and an ester of acrylic or methacrylic acid. The copolymer preferably includes a cross-linking agent and a hydrophilic monomer. Contact lenses made of the mterial can be readily machined and polished into hard contact lenses having excellent dimensional stability but also have extremely high permeability to oxygen.

REFERENCES:
patent: 3808178 (1974-04-01), Gaylord

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