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US 5,616,757 AGranted
Organosilicon-containing materials useful for biomedical devices
AssigneeBausch & Lomb Incorporated
InventorsRonald E. Bambury, Jay F. Kunzler
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Abstract
Organosilicon-containing materials are useful in articles such as biomedical devices, including contact lenses.
Claims36
A polymer containing repeating units of the formula:
- ##STR25## wherein:
- each Y is --O-- or --NR.sup.30 -- wherein R.sup.30 is H or C.sub.1 -C.sub.6 alkyl;
- each R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is independently selected from the group consisting of H, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 haloalkyl, C.sub.2 -C.sub.6 alkyl wherein at least one methylene group is replaced with --O--, C.sub.2 -C.sub.6 haloalkyl wherein at least one methylene group is replaced with --O--, and --R.sup.Si ;
- m and n are independently 0 or an integer of 1 to 6;
- each R.sup.Si is independently an organosilicon radical;
- and
- R is the divalent residue of an .alpha.,.omega.-dihydroxyl compound or an .alpha.,.omega.-diamino compound.
4 more elements
A shaped article which is formed of a polymer containing repeating units of the formula:
- ##STR32## wherein:
- each Y is --O-- or --NR.sup.30 -- wherein R.sup.30 is H or C.sub.1 -C.sub.6 alkyl;
- each R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is independently selected from the group consisting of H, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 haloalkyl, C.sub.2 -C.sub.6 alkyl wherein at least one methylene group is replaced with --O--, C.sub.2 -C.sub.6 haloalkyl wherein at least one methylene group is replaced with --O--, and --R.sup.Si ;
- m and n are independently 0 or an integer of 1 to 6;
- each R.sup.Si is independently an organosilicon radical;
- and
- R is the divalent residue of an .alpha.,.omega.-dihydroxyl compound or an .alpha.,.omega.-diamino compound.
4 more elements
Dependencies are inferred from the claim text.