Water soluble barrier film conformal coating composition and method of cleaning contaminated surfaces
View Patent ↗An alkaline composition is described having a first nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 10 to about 15, a second nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 16 to 20, an aqueous solvent, and a bio-film permeation agent. A total amount of the first surfactant and the second surfactant in the composition ranges from about 2 to about 20 percent by weight of a total weight of the composition.
1. An alkaline composition having a pH ranging from about 8.5 to about 10 consisting essentially of:
a first substantially hydrophilic nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 12 to about 15;
a second substantially hydrophilic nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 16 to 20;
a bio-film permeation agent; and
an aqueous solvent, wherein a total amount of the first substantially hydrophilic nonionic alkoxylated alcohol surfactant and the second substantially hydrophilic nonionic alkoxylated alcohol surfactant in the alkaline composition ranges from about 2 to about 20 percent by weight of a total weight of the alkaline composition.
2. The alkaline composition of claim 1 , wherein the bio-film permeation agent comprises a fatty acid sulfate.
3. The alkaline composition of claim 2 , wherein the bio-film permeation agent is selected from the group consisting of sodium lauryl sulfate, sodium lauryl ether sulfate, ammonium lauryl sulfate, ammonium lauryl ether sulfate, sophorose biosurfactant, sodium lauroyl sarcosinate, triethanolamine lauroyl-L-glutamate, sodium myristyl sarcosinate, sodium dodecyl sulfate, potassium laurate, sodium dodecane sulfonates, and sodium lauryl ethoxysulfate.
4. The alkaline composition of claim 1 , further comprising a chelating agent.
5. The alkaline composition of claim 4 , wherein the chelating agent comprises an alkylenediamine tetraacetate compound.
6. The alkaline composition of claim 1 , further comprising a biocide agent.
7. The alkaline composition of claim 1 , wherein the alkaline composition has a pH ranging from about 9.0 to about 9.5.
8. The alkaline composition of claim 1 , wherein the first substantially hydrophilic alkoxylated alcohol surfactant is present in an amount from about 1 to about 5 percent by weight; the second substantially hydrophilic alkoxylated alcohol surfactant is present in an amount from about 5 to about 10 percent by weight; and the bio-film permeation agent is present in an amount from about 5 to about 20 percent by weight, based on the total weight of the alkaline composition.
9. The alkaline composition of claim 8 , further comprising a weak base in an amount sufficient to provide the alkaline composition with a pH in the range of from about 9.0 to about 9.5.
10. The alkaline composition of claim 9 , further comprising a chelating agent in an amount ranging from about 0.05 to about 1.0 percent by weight of the total weight of the alkaline composition.
11. A rinse solution comprising the alkaline composition of claim 1 .
12. A soak solution comprising the alkaline composition of claim 10 .
13. A alkaline rinse solution having a pH ranging from about 8.5 to about 10 for applying a protective film to surfaces of medical equipment consisting essentially of:
a first substantially hydrophilic nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 12 to about 15;
a second substantially hydrophilic nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 16 to 20;
a bio-film permeation agent in an amount from about 3 to about 5 percent by weight; and
an aqueous solvent, wherein a total amount of the first substantially hydrophilic nonionic alkoxylated alcohol surfactant and the second substantially hydrophilic nonionic alkoxylated alcohol surfactant in the solution ranges from about 8 to about 10 percent by weight of a total weight of the alkaline rinse solution.
14. The alkaline rinse solution of claim 13 , further comprising a chelating agent.
15. The alkaline rinse solution of claim 13 , wherein the alkaline rinse solution has a pH ranging from about 8.0 to about 9.5.
16. The alkaline rinse solution of claim 13 , wherein the first alkoxylated alcohol surfactant is present in an amount from about 1 to about 5 percent by weight, and the second alkoxylated alcohol surfactant is present in an amount from about 5 to 10 percent by weight, based on the total weight of the alkaline rinse solution.
17. A alkaline soak solution having a pH ranging from about 8.5 to about 10 for initially cleaning surfaces of medical equipment consisting essentially of:
a first substantially hydrophilic nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 12 to about 15;
a second nonionic alkoxylated alcohol surfactant having an HLB value ranging from about 16 to 20;
a bio-film permeation agent in an amount from about 5 to about 15 percent by weight; and
an aqueous solvent, wherein a total amount of the first hydrophilic nonionic alkoxylated alcohol surfactant and the second hydrophilic nonionic alkoxylated alcohol surfactant in the alkaline solution ranges from about 5 to about 10 percent by weight of a total weight of the soak solution.
18. The soak solution of claim 17 , comprising a chelating agent.