Patent Number: 6,309,596

Title: Treatment of contact lenses with aqueous solution comprising a biguanide disinfectant stabilized by a poloxamine

Abstract: The present invention is directed to a biguanide-containing disinfecting solution containing a particular type of poloxamine for stabilizing a polymeric biguanide. The poloxamine surfactant comprises at least about 90 weight percent of poly(oxyethylene) and poly(oxypropylene) segments, in one or more copolymer chains, wherein the weight average molecular weight of said surfactant is from about 10,000 to about 30,000 and wherein at least about 70 weight percent of said poly(oxyethylene) and poly(oxypropylene) segments are poly(oxyethylene) segments, and wherein the HLB value is at least 27. The method of the present invention comprises cleaning and disinfecting a contact lens with the above-described solution. Products according to the present invention provide enhanced cleaning while maintaining biocidal efficacy.

Inventors: Xia; Erning (Penfield, NY), Heiler; David J. (Avon, NY)

Assignee: Bausch & Lomb Incorporated

International Classification: A61L 12/14 (20060101); A61L 12/00 (20060101); A01N 002/08 (); A61L 002/00 ()

Expiration Date: 10/30/2018