Ph-controlled protein removing cleaner

Details Ph-controlled protein removing cleaner Ph-controlled protein removing cleaner

C - Chemistry, Metallurgy

11

D

134/34

C11D 7/10 (2006.01) A61L 12/08 (2006.01) C11D 3/00 (2006.01) C11D 3/02 (2006.01) C11D 7/16 (2006.01) C11D 11/00 (2006.01) C11D 17/00 (2006.01) G02C 13/00 (2006.01) C11D 3/386 (2006.01)

Patent

CA 2032236

A pH controlled protein removal system and a method of using it in the substantial absence of a protein digesting enzyme and, preferably, in the substantial absence of a surfactant is disclosed. The system is a pH-controlled protein-cleaning composition for e.g. contact lenses comprising (a) water; (b) a tonicity builder sufficient to render said composition ophthalmically acceptable; and (c) a pH regulator sufficient to provide and maintain the pH of the composition at a pH of about 7.5 to about 11.5; in the substantial absence of a protein-digesting enzyme. The inventive method is for removing proteinaceous deposits from a polymeric substrate, e.g, a contact lens, in the substantial absence of a proteinaceous deposit digesting enzyme, comprising contacting said polymeric substrate having a proteinaceous deposit thereon with an aqueous solution at a pH of about 7.5 to about 11.5 to free at least a significant portion of said proteinaceous deposit from said substrate and removing said proteinaceous deposit reduced substrate from said solution.

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