Amphoteric surfactant solution for cleaning or preserving...

Details Amphoteric surfactant solution for cleaning or preserving... Amphoteric surfactant solution for cleaning or preserving...

C - Chemistry, Metallurgy

11

D

134/6

C11D 1/88 (2006.01) A61L 2/18 (2006.01) A61L 12/14 (2006.01) C11D 1/90 (2006.01) C11D 3/00 (2006.01) G02C 13/00 (2006.01)

Patent

CA 1301583

4-15760/+/CGC 1180 Amphoteric surfactant solution for cleaning or preserving soft contact lenses Abstract of the Disclosure The instant invention relates to an aqueous self-preserving soft contact lens cleaning or preserving solution comprising, as its only preservative agent, an effective surfactant and solution preserving amount of a water-soluble amphoteric surfactant of the formula I Image (I) wherein R is alkyl, alkenyl or alkanedienyl of 6 to 18 carbon atoms each of which are unsubstituted or substituted by halo, hydroxy or amino; A is -O-, -S-, -C(O)O- or -C(O)NR'- where R' is hydrogen or lower alkyl; R1 is alkylene of 2 to 6 carbon atoms which is unsub- stituted or substituted by hydroxy; R2 and R3 are independently hydrogen or lower alkyl, which is unsubstituted or substituted by carboxy or by one or two hydroxyls, one of which may be esterified with phosphoric o. sulfuric acid; and R4 is alkylene of up to 3 carbon atoms which is unsubstituted or substituted by hydroxy; or an ophthalmologically acceptable salt thereof.

529874

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