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US 4,046,706 AGranted
Contact lens cleaning composition
AssigneeFlow Pharmaceuticals, Inc.
InventorJoseph Zenon Krezanoski
Life of this patent
Estimating the term…
Abstract
A composition for cleaning contact lenses is provided. The composition 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 gms per 100 ml, a cloud point in 1% aqueous solutions above about 30.degree. C, and a foam height in excess of 30 mm; a microbial growth inhibitor; ethyl or isopropyl alcohol; an amphoteric surfactant; and water.
Claims19
An aqueous composition for cleaning contact lenses which comprises:
- a. about 0.01% to about 40% of 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% aqueous solution above about 30.degree. C and a Foam Height in excess of 30 mm;
- b. about 2% to about 25% ethyl or isopropyl alcohol;
- and
- c. about 2% to about 25% of an amphoteric surfactant having the formula ##STR6## in which R is a C.sub.6 to C.sub.24 hydrocarbon radical, selected from straight or branch chain, saturated or unsaturated, aliphatic hydrocarbon or an alkyl-aryl group in which the alkyl group contains at least six carbon atoms;
- R.sub.1 is H, alkali metal, or CH.sub.2 COOM;
- R.sub.2 is a C.sub.1 to C.sub.4 alkylene group;
- Z is ##STR7## M is alkali metal, H or a nitrogen containing organic base;
- and G is OH, or a radical comprising the acid group of a C.sub.6 to C.sub.24 anionic surface active sulfate or sulfonate.
5 more elements
An aqueous composition for cleaning contact lenses which comprises:
- a. about 10% to about 25% of 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% aqueous solution above about 30.degree. C and a Foam Height in excess of 30 mm;
- b. about 5% to about 20% ethyl or isopropyl alcohol;
- and
- c. about 5% to about 15% of an amphoteric surfactant having the formula ##STR9## in which R is a C.sub.6 to C.sub.24 hydrocarbon radical, selected from straight or branch chain, saturated or unsaturated, aliphatic hydrocarbon or an alkyl-aryl group in which the alkyl group contains at least six carbon atoms;
- R.sub.1 is H, alkali metal, or CH.sub.2 COOM;
- R.sub.2 is a C.sub.1 to C.sub.4 alkylene group;
- Z is ##STR10## M is alkali metal, H or a nitrogen containing organic base;
- and G is OH, or a radical comprising the acid group of a C.sub.6 to C.sub.24 anionic surface active sulfate or sulfonate.
5 more elements
Dependencies are inferred from the claim text.