Polybutadiene-based compositions for contact lenses
AssigneeBausch & Lomb Incorporated
InventorsYu-Chin Lai, Ronald E. Bambury
Life of this patent
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Abstract
Contact lenses are made from the polymerization product of a monomer mixture comprising a polybutadiene-based compound as represented by formula (I) E--B(AB).sub.a --E (I) wherein: A is selected from the group consisting of a chemical bond, --OCO--, --COO--, --CONH--, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--, a is zero or an integer of at least 1; each B is independently represented by the formula (II) ##STR1## where each of m, n, and p is independently 0 or greater, provided that m+n+p is at least 10; R is hydrogen or C.sub.1 -C.sub.4 alkyl; each E is independently a polymerizable terminal ethylenically unsaturated organic group.
Claims12
A contact lens formed from the polymerization product of a monomer mixture comprising a polybutadiene-based compound having the following structure
- E--B(AB).sub.a --E
- in which
- each A is independently selected from the group consisting of a chemical bond or --OCO--, --COO--, --CONH--, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--;
- a is zero or at least 1;
- each B is independently represented by the formula ##STR12## where each of m, n, and p is independently 0 or greater, provided such that m+n+p is at least 10;
- R is hydrogen or C.sub.1 -C.sub.4 alkyl;
- each E is independently a polymerizable terminal ethylenically unsaturated organic group having the formula:
- ##STR13## wherein R.sup.2 is hydrogen or methyl;
- R.sup.3 is selected from the group consisting of hydrogen, an alkyl having 1 to 6 carbon atoms, and a --CO--Y'--R.sup.1 radical wherein Y' is --O--, --S--, or --NH-- and R.sup.1 is a C.sub.1 to C.sub.12 alkyl;
- each of X and R.sup.4 is independently selected from the group consisting of --OCO--, --COO--, --CONH--, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--;
- Ar is an aromatic radical having 6 to 30 carbon atoms;
- each of t and y is independently 0 or an integer of 1 to 6;
- and each of u, v and w is independently 0 or 1.
A hydrogel that is the hydrated polymerization product of a monomer mixture comprising the polybutadiene-based compound having the following structure
- E--B(AB).sub.a --E
- in which
- each A is independently selected from the group consisting of a chemical bond or --OCO--, --COO--, --CONH--, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--;
- a is zero or of at least 1;
- each B is independently represented by the formula ##STR17## where each of m, n, and p is independently 0 or greater, provided such that m+n+p is at least 10;
- R is hydrogen or C.sub.1 -C.sub.4 alkyl;
- each E is independently a polymerizable terminal ethylenically unsaturated organic group having the formula:
- ##STR18## wherein R.sup.2 is hydrogen or methyl;
- R.sup.3 is selected from the group consisting of hydrogen, an alkyl having 1 to 6 carbon atoms, and a --CO--Y'--R.sup.1 radical wherein Y' is --O--, --S--, or --NH-- and R.sup.1 is a C1 to C12 alkyl;
- each of X and R.sup.4 is independently selected from the group consisting of --OCO--, --COO--, --CONH --, --NHCO--, --OCOO--, --NHCOO-- and --OCONH--;
- Ar is an aromatic radical having 6 to 30 carbon atoms;
- each of t and y is independently 0 or an integer of 1 to 6;
- and each of u, v and w is independently 0 or 1.
Dependencies are inferred from the claim text.