Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1976-11-08
1980-01-08
Lilling, Herbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526227, 526279, C08F 2610, C08F 3008
Patent
active
041828224
ABSTRACT:
A new composition of matter specially adapted for the production of contact lenses, artificial eyes or other prosthetic devices. The composition has the characteristics of increased hydrophilicity, softness after hydration and oxygen permeability. The composition is a solid copolymer of comonomers consisting essentially of about 15 to 65 parts by weight of one or more of the amide group containing monomers and about 10 to 85 parts by weight of one or more of the polysiloxanylalkyl ester of acrylate or methacrylate. Optionally, 0 to 75 parts by weight of at least one of the property modifier vinyl monomers such as methyl methacrylate, ethylacrylate, etc., can be employed into the copolymers. The inventive material is optionally transparent, translucent or opaque depending on the type, composition and relative content of the comonomers. In general, the transparent composition is suitable for use in making contact lenses.
REFERENCES:
patent: 3808178 (1974-04-01), Gaylord
patent: 3948871 (1976-04-01), Butterfield et al.
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