Method for inhibiting microbial adhesion on surfaces

• US 6,241,898 B1
• Filed: 03/16/1998
• Issued: 06/05/2001
• Est. Priority Date: 04/19/1996
• Status: Expired due to Term

• Current Assignee: Solenis Technologies LP (Innovative Water Care, LLC)
• Original Assignee: BetzDearborn Inc. (Veolia Environnement SA)
• Inventors: Wright, J. Barry, Johnson, M. Christine
• Primary Examiner(s): Hruskoci, Peter A.
• Application Number:
  US09/039,967
• Time in Patent Office: 1,177 Days
• Field of Search: 162/161, 210/698-701, 210/749, 210/764, 210/928, 424/78.09
• US Class Current: 210/764
• CPC Class Codes: C02F 1/50 by addition or application of a germicide or by oligodynamic treatment C02F1/4606, C02F1/467, C02F1/76 take precedence
• CPC Class Codes: C02F 2103/023 Water in cooling circuits
• CPC Class Codes: C02F 2103/28 from the paper or cellulose industry
• CPC Class Codes: C10M 135/10 Sulfonic acids or derivatives thereof
• CPC Class Codes: C10M 145/34 of two or more specified different types
• CPC Class Codes: C10M 173/00 Lubricating compositions containing more than 10% water
• CPC Class Codes: C10M 2201/02 Water
• CPC Class Codes: C10M 2209/107 of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
• CPC Class Codes: C10M 2219/044 Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10N 2020/01 Physico-chemical properties
• CPC Class Codes: C10N 2040/20 Metal working
• CPC Class Codes: D21H 21/04 Slime-control agents

Abstract

A treatment for inhibiting the microbial adhesion on surfaces in contact with an aqueous system is disclosed, which comprises adding to the system the combination of an alkylsulfosuccinate surfactant and a block copolymer.

Claims

1. A method for inhibiting the microbial colonization of surfaces in contact with an aqueous system which comprises adding to said system from about 1 to 150 ppm of a combination of (a) alkylsulfosuccinate surfactant with alkyl chain lengths of from about 5 to 13 carbons and (b) polyoxyethylene-polyoxypropylene block copolymer surfactant to substantially prevent adhesion of microbes to said surfaces while preserving the viability of microbes in said system, allowing for discharge of the microbes from said system, said polyoxyethylene-polyoxypropylene block copolymer surfactant exhibiting no colonization inhibition or substantially no colonization inhibition at concentrations less than 100 mg/l when used alone.

2. The method of claim 1 wherein said polyoxyethylene-polyoxypropylene block copolymer surfactant exhibits no colonization inhibition or substantially no colonization inhibition at concentrations less than 200 mg/l when used alone.

3. The method of claim 1 wherein the alkylsulfosuccinate surfactant comprises at least one of diamylsulfosuccinate, diethylhexylsulfosuccinate and dinonylsulfosuccinate.

4. The method of claim 1 wherein the weight ratio of (a):

(b) is about from 4;

1 to 1;

10.

5. The method of claim 4 wherein the weight ratio of (a):

(b) is about 1;

2.

6. The method of claim 1 wherein said aqueous system comprises a pulping or papermaking system.

7. The method of claim 1 wherein said aqueous system comprises a cooling water system.

8. The method of claim 1 wherein said aqueous system comprises a metal working system.

9. The method of claim 1 wherein said aqueous system comprises an oil and gas system.

10. The method of claim 1 wherein said surfaces are acrylic, ceramic, or metal.

11. The method of claim 1 wherein said surfaces are stainless steel.