Vinyl carbonate and vinyl carbamate contact lens material monomers
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United States of America Patent
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Mar 11, 1997
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app pub date -
May 25, 1995
filing date -
May 2, 1989
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Abstract
Novel monomers of the general formula ##STR1## where b is 0 or 1, a is 1, 2, 3 or 4, R.sup.2 is a monovalent alkyl radical and R is an organic radical. The novel monomers may be employed to produce novel copolymers useful as hydrogel, soft non-hydrogel and/or rigid gas permeable contact lens materials.
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