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US 5,070,215 AGranted
Novel vinyl carbonate and vinyl carbamate contact lens material monomers
AssigneeBausch & Lomb Incorporated
InventorsRonald E. Bambury, David E. Seelye
Life of this patent
Estimating the term…
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.
Claims8
Compounds of the general formula
- wherein
- R.sup.2 denotes --H or --CH.sub.3 ;
- b is 0 or 1;
- a is 1, 2, 3, or 4;
- and
- R is an organosilicon radical chosen from the groups of radicals represented by the formulae:
- ##STR62## wherein x is 25 on the average;
- ##STR63## where R.sup.1 denotes a monovalent organic radical selected from the group consisting of an alkyl radical with 1 to 6 carbon atoms, or a fluoroalkyl radical with 1 to 6 carbon atoms;
- R.sup.cl denotes ##STR64## p is 1 to 6;
- m is 0 to 5;
- and d is 1-200.
8 more elements
The compound 3-[tris(trimethylsiloxy) silyl]propylaminoethyl vinyl carbonate.
Dependencies are inferred from the claim text.