Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using disinfecting or sterilizing substance
Patent
1997-10-23
1999-10-12
Thornton, Krisanne
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Using disinfecting or sterilizing substance
422 1, 424429, 424464, 514839, 514840, A61L 200
Patent
active
059650885
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 R.sup.1 and R.sup.4 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; R.sup.2 and R.sup.3 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; R.sup.6 and R.sup.7 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.
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Lever Andrea M.
Lever, Jr. O. William
Konkol Chris P.
Thornton Krisanne
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