Method for providing rapid disinfection of contact lenses
First Claim
1. A method of cleaning and/or disinfecting a soft contact lens comprising:
- (a) rubbing the contact lens with an ophthalmically safe solution comprising the following components;
(i) a microbiocidally effective amount of the hydrorhloride salt of a bis(biguanide) in the amount of about 2.0 to about 8.0 ppm, or a corresponding molar amount of the bis(biguanide) in the form of another water-soluble salt or the free base thereof, which bis(biguanide) has the following general formula;
##STR13## wherein R1 and R4 are independently selected from the group consisting of branched or unbranched alkyl having 4-12 carbon atoms, alkoxyalkyl ether or alkylsulfide thioether radical having 4-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl radical having 5-12 carbon atoms;
R2 and R3 are independently selected from the group consisting of hydrogen, alkyl having 1-12 carbon atoms, alkoxyalkyl having 1-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl having 5-12 carbon atoms;
R6 and R7 are independently selected from the group consisting of hydrogen and alkyl radical having 1-6 carbon atoms, and A in the above formula is a divalent group having 4-16 carbon atoms and is selected from the group consisting of alkylene, alkyloxyalkyl, and alkylsufide radical, wherein the aforesaid alkyoxyalkyl or alkylsulfide radicals are either a polymethylene chain interrupted with one or more oxygen and/or sulfur atoms or a polymethylene chain substituted with an alkoxy (--OR8) or alkylthio (--SR9) group, wherein R8 and R9 are independently selected from the group consisting of alkyl having 1-12 carbon atoms, or a cycloalkyl or cycloalkyl-alkyl having 5-12 carbon, or wherein A is a divalent polymethylelne group having 8 to 16 carbon atoms interrupted with a divalent radical of cyclohexane or diaza-cyclohexane;
(ii) an effective amount of a buffering agent,(iii) an effective amount of a surfactant; and
(b) soaking the rubbed contact lens from step (a) in the solution for a total period of time that is within a range of about 5 minutes to about 75 minutes; and
(c) directly placing the treated lens on an eye of the wearer, such that a rinse with a different solution is not required.
9 Assignments
0 Petitions
Accused Products
Abstract
The present invention is directed to method of disinfecting a contact lens with an ophthalmically safe disinfecting aqueous solution comprising about 2.0 to about 8.0 ppm of a bis(biguanide) having the following formula: ##STR1## wherein R1 and R4 are independently selected from the group consisting of branched or unbranched alkyl having 4-12 carbon atoms, ether or thioether radical having 4-12 carbon atoms, or cycloalkyl or cycloalkyl-alky radical having 5-12 carbon atoms; R2 and R3 are independently selected from the group consisting of hydrogen, alkyl having 1-12 carbon atoms, alkoxyalkyl having 1-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl having 5-12, carbon atoms; R6 and R7 are independently selected from the group consisting of hydrogen and alkyl radical having 1-6 carbon atoms, and A in the above formula is selected from the group consisting of a divalent alkyl, alkyloxyalkyl, or alkylsufide radical each having 4-12 carbon atoms. The invention is also directed to a method of cleaning and/or disinfecting a contact lens within a minimum soaking period that is not more than about 75 minutes.
43 Citations
20 Claims
-
1. A method of cleaning and/or disinfecting a soft contact lens comprising:
-
(a) rubbing the contact lens with an ophthalmically safe solution comprising the following components; (i) a microbiocidally effective amount of the hydrorhloride salt of a bis(biguanide) in the amount of about 2.0 to about 8.0 ppm, or a corresponding molar amount of the bis(biguanide) in the form of another water-soluble salt or the free base thereof, which bis(biguanide) has the following general formula;
##STR13## wherein R1 and R4 are independently selected from the group consisting of branched or unbranched alkyl having 4-12 carbon atoms, alkoxyalkyl ether or alkylsulfide thioether radical having 4-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl radical having 5-12 carbon atoms;
R2 and R3 are independently selected from the group consisting of hydrogen, alkyl having 1-12 carbon atoms, alkoxyalkyl having 1-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl having 5-12 carbon atoms;
R6 and R7 are independently selected from the group consisting of hydrogen and alkyl radical having 1-6 carbon atoms, and A in the above formula is a divalent group having 4-16 carbon atoms and is selected from the group consisting of alkylene, alkyloxyalkyl, and alkylsufide radical, wherein the aforesaid alkyoxyalkyl or alkylsulfide radicals are either a polymethylene chain interrupted with one or more oxygen and/or sulfur atoms or a polymethylene chain substituted with an alkoxy (--OR8) or alkylthio (--SR9) group, wherein R8 and R9 are independently selected from the group consisting of alkyl having 1-12 carbon atoms, or a cycloalkyl or cycloalkyl-alkyl having 5-12 carbon, or wherein A is a divalent polymethylelne group having 8 to 16 carbon atoms interrupted with a divalent radical of cyclohexane or diaza-cyclohexane;(ii) an effective amount of a buffering agent, (iii) an effective amount of a surfactant; and (b) soaking the rubbed contact lens from step (a) in the solution for a total period of time that is within a range of about 5 minutes to about 75 minutes; and (c) directly placing the treated lens on an eye of the wearer, such that a rinse with a different solution is not required. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 19)
-
-
11. A method of cleaning and/or disinfecting a contact lens comprising:
-
(a) rubbing the contact lens with an ophthalmically safe solution comprising the following components; (i) microbiocidally effective amount of the hydrochloride salt of a bis(biguanide) in the amount of about 2.0 to about 8.0 ppm, or a corresponding molar amount of the bis(biguanide) in the form of another water-soluble salt or the free base thereof, which bis(biguanide) has the following general formula;
##STR15## wherein wherein R1 and R4 are independently selected from the group consisting of branched or unbranched alkyl having 4-12 carbon atoms, alkoxyalkyl or alkylsulfide radical having 4-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl radical having 5-12 carbon atoms;
R2 and R3 are independently selected from the group consisting of hydrogen, alkyl having 1-12 carbon atoms, alkoxyalkyl having 1-12 carbon atoms, or cycloalkyl or cycloalkyl-alkyl having 5-12 carbon atoms;
R6 and R7 are independently selected from the group consisting of hydrogen and alkyl radical having 1-6 carbon atoms, and A in the above formula is a divalent group having 4-16 carbon atoms and is selected from the group consisting of an alkylene, alkyloxyalkyl, and alkylsufide radical, wherein the aforesaid alkyoxyalkyl or alkylsulfide radicals are either a polymethylene chain interrupted with one or more oxygen and/or sulfur atoms or a polymethylene chain substituted with an alkoxy (--OR8) or alkylthio (--SR9) group, wherein R8 and R9 are independently selected from the group consisting of alkyl having 1-12 carbon atoms, or a cycloalkyl or cycloalkyl-alkyl having 5-12 carbon, or wherein A is a divalent polymethylene group having 8 to 16 carbon atoms interrupted with a divalent radical of cyclohexane or diaza-cyclohexane;(ii) one or more polymeric biguanides in the total amount of about 0.1 to about 3.0 ppm, which polymeric biguanides have the following formula;
##STR16## wherein Z is an organic divalent bridging group which may be the same or different throughout the polymer, n is at least 3, and X1 and X2 are independently selected from the groups --NH2 and ##STR17## (iii) an effective amount of a buffering agent;
(iv) an effective amount of a surfactant present; and(b) soaking the rubbed contact lens from step (a) in the solution for a total period of time that is within a range of about 5 minutes to about 75 minutes; and (c) directly placing the treated lens on an eye of the wearer, such that a rinse with a different solution is not required. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20)
-
Specification