Contact lens material

Details Contact lens material Contact lens material

1986-07-22

1988-05-10

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526263, 526279, C08F 2022, C08F 3008

Patent

active

047436670

ABSTRACT:
The invention relates to novel multifunctional organosiloxane monomers which can be represented by the general formulas: ##STR1## wherein, at least one of "X.sup.1 "-"X.sup.7 " is a group of the following structure: ##STR2## and its copolymerization with monofunctional organosiloxane monomers which can be represented by the general formulas: ##STR3## and alkyl and/or cyclic alkyl esters of acrylic, methacrylic acids and/or itaconate esters, and in some cases fluoroalkyl esters of acrylic, methacrylic acids and/or fluoroalkyl itaconate esters to produce excellent oxygen permeable hard contact lens material.
Preferably, the copolymer includes cross-linking agents and wetting agents.
Contact lenses manufactured from the materials can be easily machined and polished into hard contact lenses having solvent-resistance and sufficient permeabilities.

REFERENCES:
patent: 4508884 (1985-04-01), Wittmann et al.
patent: 4525563 (1985-06-01), Shibato et al.
patent: 4602074 (1986-07-01), Mizutani et al.

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