Flexible contact lens cleaning, storing, and wetting composition

Details Flexible contact lens cleaning, storing, and wetting composition Flexible contact lens cleaning, storing, and wetting composition

1973-07-09

1976-05-04

Miller, Edward A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

424 78, 424317, 424320, 424329, C11D 348

Patent

active

039546446

ABSTRACT:
A contact lens cleaning, storing and wetting solution is provided for cleaning, storing and wetting flexible silicone contact lenses. The solution comprises a poly (oxyethylene)- poly (oxypropylene) block copolymer having a molecular weight between about 1900 and 15,500, a water solubility in excess of about 10 grams per 100 ml., a cloud point in 1 percent aqueous solution above about 30.degree.C., and a Foam Height in excess of 30 mm; a microbial growth inhibitor, such as benzalkonium chloride; purified water; and a sufficient amount of at least one essentially neutral, water-soluble compatible salt to provide a solution salt content equivalent to about 0.5 to 1.8 percent sodium chloride. The solution can also contain disodium or trisodium ethylenediamine tetraacetate and a polymeric viscosity building agent, if desired.
A cleaning composition for polyhydroxylated alkyl methacrylate soft contact lenses includes the above poly(oxyethylene)-poly(oxypropylene) block copolymer and sorbic acid as a germicidal ingredient.

REFERENCES:
patent: 2703777 (1955-03-01), Feinstein et al.
patent: 2921885 (1960-01-01), Bouchal
patent: 3052604 (1972-09-01), Davis et al.
patent: 3171752 (1965-03-01), Rankin
patent: 3183152 (1965-05-01), Szekely et al.
patent: 3240709 (1966-03-01), Rankin
patent: 3539520 (1970-11-01), Cantor et al.

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