Patent ID: 6153568
Filing Date: 2000-11-28
Classification: A61L,C11D

Abstract:
An ophthalmically safe solution for treating contact lenses comprising an aqueous solution comprising, before mixing, the following components:(a) between about 10 and 400 ppm of a polyquaternium polymer comprising 10 to 45 mole percent of a quaternary-amine-functional repeat unit that is the copolymerization reaction product of one or more comonomers selected from the group consisting of substituted or unsubstituted vinylimidazoles or their vinylimidazoliuum salts, and mixtures thereof, which polymer has a weight average molecular weight of 5,000 to 5,000,000; and(b) a polymeric biguanide, in the total amount of between about 0.10 to about 3.0 ppm, having the formula: ##STR6## wherein Z is an organic divalent bridging group which may be the same or different throughout the polymer, n is on average at least 3, and X.sup.1 and X.sup.2 are independently selected from the groups ##STR7## (c) an effective amount of a buffering agent to buffer said composition; and(d) water in an amount of at least 80% by weight.