Antimicrobial, beverage compatible conveyor lubricant
Lubricating solutions are used on conveying systems in the beverage industry during the filling of containers with beverages. Lubricating compositions of the present invention, especially those designed for use in beverage conveying systems for contained beverages, comprise at least the following components:a) an alkyl alkoxylated (e.g., ethoxylated or propoxylated, preferably ethoxylated) phosphate ester,b) aryl (e.g., aromatic, such as phenol) alkoxylated (e.g., ethoxylated or propoxylated) phosphate ester,c) an aromatic or linear quaternary ammonium antimicrobial agent, andd) a liquid carrier, such as water.These lubricating solutions are capable of providing good lubricity and antimicrobial activity over a prolonged time.
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Claims
1. An antimicrobial conveyor lubricant comprising:
- a) an alkyl phosphate ester,
- b) an aryl phosphate ester,
- c) a quaternary ammonium antimicrobial agent, and
- d) water.
2. The lubricant of claim 1 wherein said alkyl phosphate ester and said aryl phosphate ester are present in a weight to weight ratio of 1.5:1 to 10.0:1 with respect to the quaternary ammonium antimicrobial agent.
3. The lubricant of claim 1 wherein the total weight of said alkyl phosphate ester and said aryl phosphate ester are present in a weight to weight ratio of 2.0:1 to 10.0:1 with respect to quaternary ammonium antimicrobial agent, which is a linear quaternary ammonium antimicrobial agent.
4. The lubricant of claim 1 wherein sodium hydroxide is present in said lubricant.
5. The lubricant of claim 1 wherein a chelating agent for divalent cations is present in said lubricant.
6. The lubricant of claim 5 wherein said chelating agent comprises an amine-substituted acetic acid.
7. The lubricant of claim 1 wherein said aryl phosphate ester comprises a phenol ester wherein said phenol group is not substituted with alkyl groups.
8. The lubricant of claim 1 wherein the pH of the lubricant is less than 8.5.
9. The lubricant of claim 1 wherein the pH of the lubricant is between 4.5 and 8.0.
10. The lubricant of claim 1 comprising water, C.sub.10-12 alkyl phosphate ester, 5 ethylene oxide units, ethylenediamine tetraacetic acid alkalating agent, didecyl dimethyl ammonium chloride, C.sub.12-15 linear alcohol, and phenol ethoxylated phosphate ester.
11. A process for lubricating a conveyor used to transport containers, said process comprising applying a composition to the conveying surface of a conveyor, said composition comprising:
- a) an alkyl alkoxylated phosphate ester,
- b) an aryl alkoxylated phosphate ester,
- c) a quaternary ammonium antimicrobial agent, and
- d) water,
12. The process of claim 11 wherein said alkyl phosphate ester and said aryl phosphate ester are present in a weight to weight ratio of 1.5:1 to 10.0:1 with respect to the quaternary ammonium antimicrobial agent.
13. The process of claim 11 wherein the total weight of said alkyl phosphate ester and said aryl phosphate ester are present in a weight to weight ratio of 2.0:1 to 10.0:1 with respect to quaternary ammonium antimicrobial agent, which is a linear quaternary ammonium antimicrobial agent.
14. The process of claim 11 wherein sodium hydroxide is present in said lubricant.
15. The process of claim 11 wherein a chelating agent for divalent cations is present in said lubricant.
16. The process of claim 15 wherein said chelating agent comprises an amine-substituted acetic acid.
17. The process of claim 11 wherein said aryl phosphate ester comprises a phenol ester wherein said phenol group is not substituted with alkyl groups.
18. The process of claim 11 wherein the pH of the lubricant is less than 8.5.
19. The process of claim 11 wherein the pH of the lubricant is between 4.5 and 8.0.
20. The process of claim 11 wherein said composition comprises water, C.sub.10-12 alkyl phosphate ester, ethylene diamine tetraacetic acid or its salts, alkalating agent, didecyl dimethyl ammonium chloride, C.sub.12-15 linear alcohol, and phenol ethoxylated phosphate ester.
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Type: Grant
Filed: Jan 5, 1998
Date of Patent: Jan 26, 1999
Assignee: Ecolab Inc (St. Paul, MN)
Inventors: Michael E. Besse (Golden Valley, MN), Joy G. Dressel (Newport, MN), Kimberly L. Person Hei (Baldwin, WI)
Primary Examiner: Jacqueline V. Howard
Law Firm: Schwegman, Lundberg, Woessner, and Kluth, P.A.
Application Number: 0/2,976
International Classification: C10M14110;
