IN SITU PREPARATION OF PERACID-BASED REMOVABLE ANTIMICROBIAL COATING COMPOSITIONS AND METHODS OF USE
In situ preparation of peracid-based removable antimicrobial coating compositions and their methods of use for controlling microorganisms at various loci are disclosed.
1 . A method of providing control of microorganisms at a locus comprising the steps:
a) combining:
i) a water soluble or water-dispersible film-forming agent;
ii) at least one cationic or nonionic antimicrobial agent;
iii) an inert solvent;
iv) an acid activated rheology agent;
v) an acid in an amount effective to initiate thickening by the rheology agent of (iv) to obtain a removable coating composition; and
b) applying said coating composition to said locus.
2 . The method of claim 1 , wherein said coating composition further comprises: a first surfactant at a concentration from 0.001 to 5 wt % of said antimicrobial coating composition, and a second surfactant at a concentration of from 0.001 to 0.2 wt % of said antimicrobial coating composition; wherein said second surfactant is an alcohol ethoxylate.
3 . The method of claim 1 , wherein said antimicrobial agent comprises a quaternary ammonium compound.
4 . The method of claim 1 , wherein said rheology agent is an acrylic polymer comprising amine functional groups and hydrophobic functional groups.
5 . The method of claim 1 , wherein said acid is an alpha-hydroxy acid chosen from the group consisting of lactic acid or glycolic acid.
6 . The method of claim 1 , wherein the rheology agent and the acid are kept separated in a multi-compartment system prior to combining; wherein the rheology agent is part of a first liquid and the acid is part of a second liquid; wherein said coating composition is generated by mixing the first liquid and the second liquid prior to the application to the locus.
7 . The method of claim 1 , wherein said film-forming agent is polyvinylalcohol or copolymers thereof; wherein said antimicrobial agent comprises a quaternary ammonium compound; wherein said inert solvent is water and wherein said acid-activated rheology agent comprises an acrylic polymer comprising amine functional groups; and wherein the vapor pressure at 25° C. of said acid is below 1000 Pa.
8 . The method of claim 1 , wherein the viscosity of said coating composition measured at 10° C. and a shear rate of 1 s −1 , is between 0.5 and 100 Pa·s.
9 . A removable antimicrobial coating composition for application at a locus, said composition obtained by combining:
i) a water soluble or water-dispersible film-forming agent;
ii) at least one cationic or nonionic antimicrobial agent;
iii) an inert solvent;
iv) an acid activated rheology agent; and
v) an acid in an amount effective to initiate thickening by the rheology agent of (iv).
10 . The composition of claim 9 , wherein said composition further comprises: a first surfactant at a concentration from 0.001 to 5 wt % of said antimicrobial coating composition, and a second surfactant at a concentration of from 0.001 to 0.2 wt % of said antimicrobial coating composition; wherein said second surfactant is an alcohol ethoxylate.
11 . The composition of claim 9 , wherein said antimicrobial agent comprises a quaternary ammonium compound.
12 . The composition of claim 9 , wherein said rheology agent is an acrylic polymer comprising amine functional groups and hydrophobic functional groups.
13 . The composition of claim 9 , wherein said acid is an alpha-hydroxy acid chosen from the group consisting of lactic acid or glycolic acid.
14 . The composition of claim 9 , wherein the rheology agent and the acid are kept separated in a multi-compartment system prior to combining; wherein the rheology agent is part of a first liquid and the acid is part of a second liquid; wherein said coating composition is generated by mixing the first liquid and the second liquid prior to the application to the locus.
15 . The composition of claim 9 , wherein said film-forming agent is polyvinylalcohol or copolymers thereof; wherein said antimicrobial agent comprises a quaternary ammonium compound; wherein said inert solvent is water and wherein said acid-activated rheology agent comprises an acrylic polymer comprising amine functional groups; and wherein the vapor pressure at 25° C. of said acid is below 1000 Pa.
16 . The composition of claim 9 , wherein the viscosity of said composition measured at 10° C. and a shear rate of 1 s −1 , is between 0.5 and 100 Pa·s.
17 . An article comprising on at least one surface thereof a removable antimicrobial coating composition, wherein the composition comprises the reaction products obtained by combining:
i) a water soluble or water-dispersible film-forming agent;
ii) at least one antimicrobial agent;
iii) an inert solvent;
iv) an acid-activated rheology agent;
v) an acid in an amount effective to initiate thickening by the rheology agent of (iv).
18 . The article of claim 17 wherein the at least one surface of the article comprises a material selected from the group consisting of: metals; minerals; natural and synthetic polymers; plastics; brick; tile; ceramic; porcelain; vinyl; glass; linoleum; and wood.
19 . The article of claim 1 wherein the article is equipment used in the food or beverage industry.
20 . The article of claim 1 wherein the article has a fibrous surface.