MXPA96004946A - Disinfecc rinse method - Google Patents

Abstract

The present invention relates to a method for disinfecting and de-staining earthenware products, said method comprising the step of applying during the rinsing step, at least about 100 ppm of a disinfectant and disinfectant contracting composition comprising: a) of about 0.5% by weight to 25% by weight of peroxycarboxylic acid, b) from about 5% by weight to 75% by weight of carboxylic acid, in which carboxylic acid comprises a mixture of octanoic acid and acetic acid, c) from about 1% by weight to 40%. % by weight of hydrogen peroxide, and d) the remainder of a vehicle, wherein said composition of disinfectant and disinfectant concentrate is non-corrosive and does not form a film with said products of the same.

Description

DISINFECTION RINSE METHOD FIELD OF THE INVENTION The invention relates generally to methods for disinfecting and deburring earthenware products, including earthenware products made of metal alloys, such as steel, silver and silvered articles. More specifically, the invention relates to methods for rinsing and disinfecting articles of earthenware with peroxyacid compositions. The method is especially useful for disinfecting and deburring articles that comprise silver, due to its low corrosivity. The composition of the invention can be generally used in manual and automatic rinsing operations, as well as the rinsing cycle in the operation of commercial and institutional facilities. Environments, wherein the method of the invention can find use, include, for example, hospitals, restaurants, care centers, hotels, cafeterias, take-away food service establishments, and other facilities where cooking utensils, as As tables and tableware are frequently used and reused during meal times.

BACKGROUND OF THE INVENTION In the case of large-volume institutional waste and service depots, disinfectant chemical compositions are generally used in the automatic or manual earthenware wash to destroy the bacteria during the rinsing operations to satisfy the minimum standards of disinfection. In many facilities the disinfection standards are met through the use of rinse water at a very high temperature 82.2 ° -90.5 ° C. When such temperatures are not obtained, a chemical disinfectant agent is usually added to one or more aqueous materials that is brought into contact with kitchen or tableware to produce an effect to kill bacteria at low temperature conditions. approximately 48.8-60 ° C. The use of the terms "high temperature" and "low temperature", herein, refer to approximately the upper temperature ranges. The low temperature methods and equipment are illustrated in the following references, Fox et al., U.A. Nos. 2, 592,884, 2,592, 885 and 2, 592, 886, 3,044,092 and 3, 146, 718, as well as Fox, patent of E. U.A. No. 3, 370, 597. In large part, these machines follow a cleaning regime, where dirty kitchen or tableware can be pre-cleaned either manually or with an automatic machine cleaning step, involving a spray with water to remove a large volume of dirt. The articles can then be directed to an area where the articles are in contact with an alkaline, aqueous cleaning composition, which acts to remove dirt by chemically attacking the protein, fat or carbohydrate stains. Then, the cleaned articles can be directed to a disinfection stage, where the articles are contacted with the disinfectant material or are directed to a combined rinsing-disinfecting stage, where the articles are contacted with a combination of rinse and disinfectant agent. Finally, the articles can be directed to a stage where they are dried, either actively by heating or passively by means of environmental evaporation. The need for disinfection has led to the consideration of several agents. One of the most common disinfectants for washing articles is sodium, aqueous hypochlorite (NaOCI). However, although sodium hypochlorite is effective, inexpensive and generally available, sodium hypochlorite has several disadvantages. First, the hypochlorite can react with hardness ions in the service water, including calcium, magnesium, iron, manganese, etc. This chemical interaction can cause deposits of lime and minerals on the parts of the machine. Said deposits tend to be formed in and on the water passages of the article washing machine, which can substantially change the flow rates of various aqueous materials through the machine. Any of these changes can seriously reduce the effectiveness of the operation of the machine. Chlorine, as a constituent of sodium hypochlorite, can also present compatibility problems when used with other chemicals, which have desirable characteristics of sheeting and rinsing aid, such as nonionic surfactants. In addition, the interaction between sodium hypochlorite and various minerals in the service water can result in staining and film formation in chinaware. Sodium hypochlorite is also a strong oxidizing chemical and can corrode substantially a variety of materials used in the manufacture of the machine and in kitchen and tableware commonly used in the current institutional environment. Chlorine can also react and degrade or corrode tableware that comprises silver or a silver finish. The degradation product is the reaction product of ionic silver and other elemental ions, with which the silver metal is brought into contact. The silver rapidly combines to form, for example, silver oxides and silver halides, in particular silver chloride, when exposed to chlorine of, for example, sodium hypochlorite. Meanwhile, various rinse aid compositions have been developed for use in both low temperature and high temperature washing systems. For example, Fraula et al., Patent of E.U.A. No. 4,147,559 and Reissue patent of E.U.A. No. 30,537, teach an apparatus and method for rinsing and chemically disinfecting foodstuffs. The description is mainly directed to the components related to the machine to ensure proper cleaning and disinfection.

In addition, a number of auxiliary rinse compositions are also known, largely based on nonionic surfactants without disinfectants. Altenschopfer, patent of E.U.A. No. 3,592,774 teaches noionic rinse agents, based on saccharide. Rue and others, patent of E.U.A. No. 3,625,901, teach surfactants used as rinse aids that have low foaming properties. Dawson et al., U.S. Patent. No. 3,941,713, teach rinse agents for dishwashing machines, which have a stainproof or non-sticky additive for treating aluminum or other metal kitchenware. Rodríguez and others, patent of E.U.A. No. 4,005,024, teach an auxiliary rinsing composition containing organosiloxane and monofunctional organic acids that act as rinsing agents. Herold et al., Patent of E.U.A. No. 4,187,121, teach a concentrate rinse agent based on glycolic saccharide ether technology. In addition, Morganson et al., Patent of E.U.A. No. 4,624,713, teach a solidified rinse agent composition containing a nonionic rinsing agent, urea, water and other components. Studies of nonionic surfactants and rinsing additives containing nonionic surfactants are found in Schick, "Nonionic Surface Agents" ("Nonionic Surfactants"), published by Marcel Dekker, and John L. Wilson, Soap and Chemical Specialties, February 1958 , p. 48-52 and 170-171. However, none of these rinses has been able to combine the effective action of sheeting and rinsing with effective disinfectant to create a disinfectant composition, which is favorable for silverware comprising silver. Accordingly, there is a strong need in the art to provide a disinfecting rinse agent that promotes film formation and stain removal, which provides a substantial disinfectant action and as a result operations without any substantial deposition formation on the articles. , washing machines or corrosion of the components of the machine or kitchenware, tableware, or tarnish of earthenware products comprising silver.

BRIEF DESCRIPTION OF THE INVENTION According to a first aspect of the invention, there is provided a method for disinfecting and de-staining earthenware products, comprising the step of applying a disinfecting rinse composition to the articles. The disinfecting rinse composition generally comprises a peroxycarboxylic acid, a carboxylic acid, hydrogen peroxide, and the remainder of an aqueous vehicle. According to a more preferred aspect of the invention, a method for disinfecting and deburring silver articles is provided. The method comprises the steps of washing the silver articles in an automatic dish washing machine and applying from about 100 ppm to 2000 ppm of a concentrated disinfectant composition. The concentrated disinfectant composition comprises from about 5% by weight to 75% by weight of a mixture of carboxylic acid comprising acetic acid and octanoic acid; from about 1% by weight to 40% by weight of hydrogen peroxide; and from about 0.5% by weight to 25% by weight of a peroxycarboxylic acid resulting from the reaction of the carboxylic acid and hydrogen peroxide, optionally a carboxylic acid solubilizer, and the remainder being an aqueous carrier. The rinse can be completed in water at high temperature or at low temperature. The invention is a method for removing and disinfecting earthenware products. The invention generally provides improved stain removal and disinfection, but does not cause significant corrosion of machine parts or articles. It has been found that the effective concentration of the materials results in low, solid, total formulations, which substantially resist staining. Finally, carboxylic acids, to which the peroxyacid materials are degraded, are non-toxic, non-corrosive, as well as non-film-forming and are compatible with commonly available materials used in the manufacture of dishwashing machines, kitchenware, tableware and articles of glass. For the purpose of this invention, the term "sheet-forming or rinsing agent" refers to chemical species that cause the aqueous rinse to become sheet. The term "rinse aid" reflects the concentrated material, which is diluted with an aqueous diluent to form an aqueous rinse. The terms "products, tableware, kitchenware, or articles of earthenware" refer to various types of articles subject to tarnish, discoloration or degradation, used in the preparation, service and consumption of food including casseroles, trays, plates for baking, processing equipment, trays, jars, bowls, plates, saucers, cups, glasses, forks, knives, spoons, spatulas, grills, pans, burners and the like, made or manufactured from thermoplastic or thermoplastic polymers, ceramics such as glasses and plates blown or lit, and elemental and alloy metal such as silver, copper, bronze, and steel among other materials. The term "silver articles" includes any of the "products, tableware, kitchenware or earthenware" that comprise silver, or a silver compound that includes silver salts, silver oxides, etc. The term "rinse" or "sheeting" refers to the ability of the aqueous rinse when in contact with the tableware to form a substantially continuous thin sheet of aqueous rinse, which is uniformly drained from the articles leaving very little stained or nothing stained after evaporation of water. The invention relates mainly to a device for cleaning and disinfecting articles, at low temperature, but can be applied to high temperature machines to provide an increased degree of confidence that the articles are properly desmanded and disinfected.

DETAILED DESCRIPTION OF THE INVENTION The invention is a method for disinfecting and dismantling earthenware products, including articles, of silver. The method of the invention includes the application of a disinfectant composition comprising a reaction product of peroxycarboxylic acid of one more carboxylic acids and an oxidant. Optionally, the composition of the invention may also comprise a stable sequestering agent, oxidant, and solubilizers, as well as other auxiliaries such as vehicles, sheet-forming agents, etc. , which are also stable in the presence of an oxidant. The disinfectant, stain remover composition is typically formulated in a liquid diluent compatible with any rinsing aid present in the system, in concentrated or diluted form. The uniqueness of the invention relates to the fact that the active components (1) are stable at substantial concentrations in the undiluted concentrate, (2) they are significant improvements with respect to the use of sodium hypochlorite in an aqueous rinse, and (3) ) provide effective disinfection and improved appearance of the items. Finally, the compositions of the invention are non-corrosive and non-film forming in contact with common materials in automatic dishwashing machines and in articles, particularly silver articles.

A. The Disinfectant and Spotting Concentrate The composition of the invention contains a peroxycarboxylic acid disinfectant composition. The peroxycarboxylic disinfectant material generally comprises at least two monocarboxylic acids having from 2 to about 18 carbon atoms. Commonly, the peroxycarboxylic material can be made by oxidizing a monocarboxylic acid directly to the peroxycarboxylic material, which is then solubilized in the compositions of the invention. In addition, the materials can be made by combining the non-oxidized acid with hydrogen peroxide to generate the acid, in situ, either before mixing the fatty substance with any of the added components or after the added components are formulated. Generally, when the peroxycarboxylic acid is formulated according to the invention, a monocarboxylic acid, such as acetic acid, is combined with an oxidant such as hydrogen peroxide. The result of this combination is a reaction that produces a peroxycarboxylic acid, such as peroxyacetic acid, and water. The reaction follows an equilibrium according to the following equation: H2O2 + RCOOH = = = = = = RCOOOH + H20 where Keq is 2.0. The importance of balance comes from the presence of hydrogen peroxide, carboxylic acid and peroxycarboxylic acid, in the same composition, at the same time. This combination provides improved disinfection without presenting any of the corrosive or damaging film-forming effects of the other rinse agents, additives or compositions. The first constituent of the equilibrium mixture comprises one or more carboxylic acids. The carboxylic acids function as a precursor for the reaction product, peroxycarboxylic acid, while providing a source of acidity and antimicrobial efficacy. The acidity stabilizes and in another way helps maintain the equilibrium concentration of the peroxycarboxylic acid. Specific examples of suitable C 2 -C 8 carboxylic acids, which can be used to make the perishable materials or combine with the hydrogen peroxide to form perishable materials, include fatty acids, and octanoic acids. These acids can be extracted from natural or synthetic sources. Natural sources include animal or vegetable fats or oils, which must be completely hydrogenated. Synthetic acids can be produced by the oxidation of petroleum wax. It has been found that the claimed method provides a preferable result of disinfection and rinsing when any number of carboxylic acids is used. Nevertheless, the highly preferred embodiments of the invention comprise the combined use of acetic and octanoic acids or derivatives thereof. Derivatives of these acids include acid salts, acid esters, as well as all naturally occurring derivatives found in commercial preparations of fatty acids, such as trace concentrations of short and long chain fatty acids and fatty acid derivatives. When used in combination, the ratio of acetic acid to octanoic acid ranges from about 20 to 1 to about 1 to 2, and most preferably from 10 to 1 to about 1 to 1, respectively. The composition of the invention also comprises an oxidant. Any number of oxidants can be used as a precursor for the formulation of a peroxycarboxylic acid. Generally, the antimicrobial composition of the invention comprises hydrogen peroxide. Hydrogen peroxide in combination with carboxylic acid and peroxycarboxylic acid provides a surprising level of antimicrobial action against microorganisms, even in the presence of high organic sediment loads. An additional advantage of hydrogen peroxide is the non-toxic nature of this composition under use and decomposition. For example, combinations of peroxyacetic acid and hydrogen peroxide result in acetic acid, water, and oxygen under decomposition. All of these constituents have been approved for use on food contact surfaces.

Hydrogen peroxide (H2O2), has a molecular weight of 34,014 and is a weakly acid, transparent, and colorless liquid. The four atoms are covalently linked in an H-O-O-H structure. Generally, hydrogen peroxide has a melting point of -0.41 ° C, a boiling point of 150.2 ° C, a density at 25 ° C of 1.425 grams per cm3, and a viscosity of 1.245 centipoise at 20 ° C. Generally, the concentration of hydrogen peroxide within the concentrate composition used in the process of the invention ranges from about 1% by weight to about 40% by weight, preferably from about 3% by weight to about 35% by weight , and most preferably from about 5% by weight to about 30% by weight. This concentration of hydrogen peroxide is very preferred since it provides an optimum antimicrobial effect in a mixture of equilibrium concentrate. The other main component of the antimicrobial composition of the invention is an oxidized carboxylic acid. This oxidized peroxycarboxylic acid provides increased antimicrobial efficacy when combined with hydrogen peroxide and monocarboxylic acid in an equilibrium reaction mixture. Generally, any number of peroxycarboxylic acids are useful according to the method of the invention. Peroxycarboxylic acids generally have the formula R (C03H) N, wherein R is alkyl, aryl-alkyl, cycloalkyl, aromatic or heterocyclic group, and N is one or more. Particularly preferred peroxy acids for use in the composition and method of the invention include peroxyacetic acid when used in combination with peroxyoctanoic acid. Peroxyacetic acid is a peroxycarboxylic acid having the formula: CH3COOOH. Generally, peroxyacetic acid is a liquid that has a pungent odor and is freely soluble in water, alcohol, ether, and sulfuric acid. Peroxyacetic acid can be prepared through any number of means known to those skilled in the art, including preparation from acetaldehyde and oxygen in the presence of cobalt acetate. A 50% solution of peroxyacetic acid can be obtained by combining acetic anhydride, hydrogen peroxide and sulfuric acid. Other methods for the formulation of peracetic acid include those described in the patent of E.U.A. No. 2,833,813, which is incorporated herein by reference. At the same time, the peroxioctanoic acid is also a peroxycarboxylic acid having the formula CH3 (CH2) 6COOOH. The peroxycarboxylic acid can also be prepared by methods known to those skilled in the art. The preferred peroxyacetic acid and peroxyoctanoic acid materials of the invention can be used to improve the disinfecting effectiveness of the materials. The peroxyacetic acid is mixed in proportions ranging from about 20 to about 1 part peroxyacetic acid per part of peroxyoctanoic acid. Preferably, the peroxyacetic acid is used at a ratio of about 10 parts per part of peroxioctanoic acid. The above disinfectant material can provide antibacterial activity to the rinse disinfectants of the invention against a wide variety of microorganisms such as gram positive (eg, Staphylococcus aureus) and gram negative (eg, Escherichia coli) microorganisms, yeasts, mold, bacterial spores, viruses, etc. When combined, the above peroxy acids may have an improved activity compared to the low molecular weight peroxy acids, alone. The composition of the invention may also comprise a vehicle. The vehicle functions to provide a reaction medium for the solubilization of constituents and the production of peroxycarboxylic acids, as well as a means for the development of an equilibrium mixture of oxidant., peroxycarboxylic acid, and carboxylic acid. The vehicle also functions to supply and moisten the antimicrobial composition of the invention to the intended substrate. Up to now, the vehicle may comprise an aqueous or organic component or components, which facilitate these functions. Generally, the vehicle comprises water, which is an excellent solubilizer and medium for reaction and equilibrium. Water is also easily accepted in articles washing environments. The vehicle can also comprise any number of other constituents such as various organic compounds, which facilitate the functions provided above. The organics that can be used include simple alkyl alcohols such as ethanol, isopropanol, n-propanol and the like. Polyols are also useful carriers, according to the invention, including propylene glycol, polyethylene glycol, glycerol, sorbitol, and the like. Any of these compounds can be used individually or in combination with other organic and inorganic constituents or, in combination with water or mixtures thereof.

Generally, the vehicle comprises a large portion of the composition of the invention and can be essentially the remainder of the composition in addition to the active antimicrobial composition, auxiliaries, and the like. Here, again, the vehicle concentration and type will depend on the nature of the composition as a whole, the storage environment, and the method of application, including the concentration of antimicrobial agent, among other factors. Notably, the vehicle must be chosen and used at a concentration, which does not inhibit the antimicrobial efficacy of the active agent in the composition of the invention.

B. Auxiliary The composition of the invention can comprise any number of auxiliaries, which are stable in an oxidizing environment, do not form a film in silver articles and add beneficial properties of stability, sequestering, film formation and rinsing, etc.

Chelating Agent The compositions of the invention may also contain a polyvalent metal chelating or complexing agent, which helps reduce the damaging effects of hardness components and service water. The harmful effects typical of calcium ions, magnesium, iron, manganese, etc. , present in the service water can interfere with the action of either the washing compositions or the disinfectant compositions or tend to decompose the active peroxygen disinfectant materials. The chelating agent or the sequestering agent can effectively complex and remove said ions from the inappropriate interaction with the active ingredients, thus improving the performance of the composition of the invention. Both organic and inorganic chelating agents can be used. Inorganic chelating agents include compounds such as sodium tripolyphosphate and other higher, linear and cyclic polyphosphate species. Organic chelating agents include both polymeric and small molecule chelating agents. Polymeric chelating agents commonly comprise polyanionic compositions such as polyacrylic acid compounds. Small molecule organic chelating agents include salts of ethylene-diamino-tetraacetic acid and hydroxyethylene-diamino-tetraacetic acid, diethylene-triamino-penta-acetic acid, nitrilotriacetic acid, ethylene-diamino-tetrapropionates, triethylene-tetramino-hexacetates and respective salts of alkali metal, ammonium, and their substituted ammonium salts. The aminophosphates and phosphonates are also suitable for use as chelating agents in the compositions of the invention and include ethylene diamine (tetramethylene phosphonates), nitrilotrismethylene phosphates, diethylene glycol and penta methyl phosphonates. ). These amino phosphonates commonly contain alkyl groups with less than 8 carbon atoms. Preferred chelating agents for use in this invention include improved food additive chelating agents, such as ethylene-diamino-tetraacetic acid disodium salts or well-known phosphonates, sold in the form of DEQU EST® materials, for example, acid. -hydroxyethylidene-1,1-diphosphonic, etc. The phosphonic acid may also comprise a low molecular weight phosphonopolycarboxylic acid, such as one having about 2-4 carboxylic acid portions and about 1-3 phosphonic acid groups. Such acids include 1-phosphono-1-methyl-succinic acid, phosphonosuccinic acid and 2-phosphonobutan-1,2,4-tricarboxylic acid. The sources of the phosphonic acids include organic phosphatic acids, such as (CH3C (P? 3H2) 2OH), available from Monsanto Industrial Chemicals Co., St. Louis, MO, as DEQUEST® 2010, which is an aqueous solution of 58 -62%; amino [tri (methylene phosphonic)] (N [CH2PO3H2] 3), available from Monsanto as DEQUEST® 2000, a 50% aqueous solution; ethylene-diamino [tetra (methylene phosphonic)] acid, available from Monsanto as DEQUEST® 2041, a 90% solid solution; and 2-phosphonobutan-1, 2,4-tricarboxylic acid, available from Mobay Chemical Corporation, Inorganic Chemicals Division, Pittsburg, PA, as Bayhibit AM, an aqueous solution of 45-50%. The aforementioned phosphonic acids can also be used in the form of water soluble acid salts, particularly the alkali metal salts, such as sodium or potassium; the ammonium salts or the alkylol amine salts, wherein the alkylol has from 2 to 3 carbon atoms, such as the mono-, di-, or tri-ethanolamine salts. If desired, individual phosphonic acids or their acid salts can also be used.

Rinse Agent A component that can be added to or used with the composition of the invention is the surfactant agent or surfactant system used to promote sheeting. Generally, any number of surfactants that are consistent with the purpose of this constituent can be used. For example, the surfactant rinsing agent may comprise a nonionic, anionic, cationic, or amphoteric surface active agent. Surface-active agent rinsing aids can be present in the disinfectant, spotting concentrate of the invention as formulated. Alternatively, these rinse agents may be introduced during application to the articles. In such a case, regardless of whether it is automatic or manual, the rinsing agent can be combined with the concentrate of the invention before application or co-dispensed separately during the application. The anionic surfactants useful in the invention comprise alkyl carboxylates, linear alkylbenzene sulphonates, parafin sulfonates and n-alkane sulphonates, sulfoccinate esters and sulfated linear alcohols. The zwitterionic or amphoteric surfactants, useful with the invention, comprise β-N-alkylaminopropionic acids, alkyl-β-iminodipropionic acids, imidazoline carboxylates, n-alkylbetaines, amine oxides, sulfobetaines and sultaines. Generally, these surfactants find preferred use in manual applications. The choice of surfactants depends on the foaming properties, which the surfactants, individually, or in combination, give to the composition of the invention. The nonionic surfactants useful in the context of this invention are generally polyether compounds (also known as polyalkylene oxide, polyoxyalkylene glycol or polyalkylene glycol). More particularly, the polyether compounds are generally polyoxypropylene or polyoxyethylene glycol compounds. Typically, the surfactants useful in the context of this invention are polyoxypropylene (PO) -polyoxyethylene (EO), organic, synthetic block copolymers. These surfactants comprise a diblock copolymer, comprising an EO block and a PO block, a center block of polyoxypropylene (PO) units, and having polyoxyethylene blocks grafted onto the polyoxypropylene unit or a center block. of EO with PO blocks attached. In addition, this surfactant may have other blocks of either polyoxyethylene or polyoxypropylene in the molecule. The average molecular weight of the useful tensivants varies from about 1000 to about 40,000 and the percentage content by weight of the ethylene oxide ranges from about 10-80% by weight. Also useful in the context of this invention are surfactants comprising alcohol alkoxylates having blocks of EO, PO, and BO. The straight aliphatic primary alcohol alkoxylates may be particularly useful as sheet forming agents. Said alkoxylates are also available from various sources, including BASF Wyandotte, where they are known as "Plurafac" surfactants. A particular group of alcohol alkoxylates that are useful are those having the general formula R- (EO) m- (PO) n, wherein m is an integer of about 2-10 and n is an integer of about 2- twenty. R can be any suitable radical such as a straight chain alkyl group, having about 6-20 carbon atoms. Other useful nonionic surfactants of the invention comprise aliphatic alcohol alkoxylates blocked at their end. These blocks at the end include, but are not limited to, methyl, ethyl, propyl, butyl, benzyl and chlorine. Preferably, said surfactants have a molecular weight of about 400 to 10., 000 The blockage at the end improves the compatibility between the nonionic agent and the oxidizing hydrogen peroxide and the percarboxylic acid, when formulated to a single composition. An especially preferred nonionic surfactant is Plurafac LF 131 from BASF, with a structure: C? 2-7 (EO) 7 (BO)? .7R, wherein R is an alkyl portion of C1.6 and preferably with 60% of the structures being methyl blocked, R comprises CH3. Other useful nonionic surfactants are alkyl polyglycosides. Another useful nonionic surfactant of the invention comprises a fatty acid alkoxylate, wherein the surfactant comprises a fatty acid moiety with an ester group comprising an EO block, a PO block, or a mixed block or heteric group. . The molecular weights of said surfactants vary from about 400 to about 10,000, a preferred surfactant comprises an EO content of about 30-50% by weight, and wherein the fatty acid portion contains from about 8 to about 18. carbon atoms. Similarly, it has also been found that the alkyl phenol alkoxylates are useful in the manufacture of the rinse agents of the invention. Such surfactants can be made from an alkyl phenol portion having an alkyl group with 4 to about 18 carbon atoms, they can contain a block of ethylene oxide, a block of propylene oxide or a mixed ethylene oxide, oxide block. of propylene or portion of heteric polymer. Preferably, said surfactants have a molecular weight of from about 400 to about 10,000 and have from about 5 to about 20 units of ethylene oxide, propylene oxide, or mixtures thereof.

Solubilizer The compositions of the invention can also include a hydrotrope, coupler or solubilizer. Said materials can be used to ensure that the composition remains stable in the phase and in a highly active, individual form. The solubilizer is particularly useful for solubilizing certain constituents of carboxylic and peroxycarboxylic acid, within the rinse aid of the invention. Said solubilizers, hydrotropes or couplers can be used at concentrations that maintain stability in the phase. Representative classes of hydrotropes, solubilizers, or coupling agents include anionic surfactants such as alkyl sulfate, alkyl or alean sulfonate, alkyl benzene or linear naphthalene sulfonate, secondary alloy sulfonate, alkyl ether sulfate or sulfonate, alkyl phosphate or phosphonate, ester of dialkyl sulfosuccinic acid, sugar esters (e.g., sorbitan esters), and a C 8 -alkyl glucoside. The preferred coupling agents for use in the rinse agents of the invention, include sulfonates, for example , n-alkyl sulfonates, n-octan sulfonates and aromatic sulfonates, such as alkyl benzene sulphonates (e.g., sodium xylene sulfonate, dialkyl ether-diphenyl sulfonate ether, or naphthalene sulfonate). Many hydrotrope solubilizers independently exhibit some degree of antimicrobial activity at a low pH. Said action is added to the efficacy of the invention, but is not a primary criterion for selecting an appropriate solubilizing agent. Since the presence of the peroxy acid material in the neutral protonated state provides biocide activity or beneficial disinfectant, the coupling agent must be selected not for its independent antimicrobial activity, but for its ability to provide effective single-phase stability in the composition, in the presence of substantially insoluble peracid materials and the most soluble compositions of the invention.

Formulation The compositions of the invention can be formulated by combining a nonionic surfactant sheet forming agent and other components with the materials that form the disinfectant, stain remover, carboxylic acid, hydrogen peroxide, and optionally, a hydrotrope solubilizer. The compositions can also be formulated with preformed peroxy acids. Preferred compositions of the invention can be made by mixing the carboxylic acid, or mixture thereof, with an optional hydrotrope solubilizer or coupler, by reacting the mixture with hydrogen peroxide and then adding the rest of the ingredients required to provide a stain-removing action and disinfectant. A stable equilibrium mixture containing the carboxylic acid or mixture with hydrogen peroxide is produced and the mixture is allowed to stand for 1-7 days at 15 ° C or more. With this preparatory method, an equilibrium mixture will be formed which contains an amount of hydrogen peroxide, non-oxidized acid, oxidized peroxyacid, and typically unmodified couplers, solubilizers or stabilizers.

D. Use of Concentrated Compositions The invention contemplates a concentrate composition, which is diluted to a solution of use before being used as a disinfectant. Mainly for reasons of economy, the concentrate was normally sold and the end user could preferably dilute the concentrate with water or an aqueous solvent to a use solution. The concentrations of general constituents of the disinfectant, spotting concentrate formulated according to the invention can be found in the following table.

Table 1 (% / P I a Balance Most Very Preferred Preferred Preferred Equilibrium H2O2 1 -40 3-35 5-30 Peroxy acid 0.5-25 1 -20 3-15 Carboxylic acid 5-75 10-50 15-40 Solubilizer 0.1 -25 1 -20 3- 10 Chelating agent 0-10 0.1 -7.5 0.5-5 Rinse agent 0-40 5-35 10-30 Vehicle Rest Rest Rest E. Usage Solutions The level of active components in the concentrate composition depends on the dilution factor sought and the desired activity of the peroxygen fatty acid compound and the desired acidity in the use solution. Generally, a dilution of about 28.35 grams of fluid to about 3.78 to 56.76 liters, that is, a dilution of about 1 part to 125 parts by volume of service water to a dilution of about 1 part to 2000 parts by volume of Service water can be obtained with a total of 2 to about 20% by weight of permeate in the concentrate. Higher use dilutions may be used, if a high usage temperature or an extended exposure time (greater than 30 seconds) is used. In the typical use focus, the concentrate is diluted with a higher proportion of water and used for spotting and disinfecting, commonly using tap water or available service, and the materials are mixed at a dilution ratio of approximately 14.17 to 283.5 grams of concentrate for every 29.68 liters of water. The balance, the aqueous, antimicrobial, disinfectant use solutions can comprise at least about 1 part per million, preferably about 10 to 400 parts per million, and most preferably about 10 to 200 parts per million of the perganous acid material; at least about 10 parts per million, typically up to 300 parts per million and preferably about 15 to 200 parts per million, and most preferably from 40 to 160 parts per million of the sheet forming or rinsing agent; from about 20 to 650 parts per million and most preferably from about 20 to 400 parts per million of carboxylic acid; and from about 20 to 1200 parts per million and preferably from about 20 to about 500 parts per million of hydrogen peroxide. The aqueous use solution may further comprise at least about 10-200 ppm, preferably about 10 to about 50 ppm of the hydrothrope solubilizer, and have a pH in the use solution in the range of about 2 to about 9, preferably from about 3 to about 8. During use, the disinfectant composition can be used with a surfactant rinse aid. In the use environment, the rinse aid can have the following concentrations (% / p): More Very Preferred Preferred Preferred Surface active agent 0.0002- 0.0003- 0.0004- Auxiliar de ringue 0.005 0.002 0.002 F. Methods of Use As noted above, the compositions of the invention are useful in the rinse steps of manual procedures accepted by the industry and in commonly available dishwashing machines. The manual procedures include disinfecting procedures of three tub washings, rinsing known to those skilled in the art. These procedures generally have a disinfectant step, which takes place at a temperature between about 20 ° C to 35 ° C. The configuration and construction of the dishwashing machines vary from high temperature to low temperature machines and from manufacturer to manufacturer. However, all the machines share common operating parameters, since the aqueous rinse compositions are sprayed onto the dishes in a rinse step at a generally set temperature for a generally fixed period. In such machines, the aqueous rinse composition is prepared by diluting the rinse agent with a suitable proportion of water, placing the aqueous rinse in a sink or other container and removing and replacing the aqueous rinse from the sink. These aqueous rinses are usually sprayed through nozzles attached to rotating rods or nozzles fixed sprinkler attached or installed in the machine to wash items in a place that optimizes the contact between the water rinse and the articles. The nozzles are usually manufactured with a geometry that improves a spray pattern for complete coverage. The sprinkler arms can be fixed or reciprocally moved or rotated inside the machine to provide full coverage. The diluted concentrate of the invention can be pumped at a rate of about 75.68 to 378.4, preferably from 151.36 to 302.72 liters per minute and is commonly in contact with dishes in a machine at low temperature, at temperatures between 48.8 to 60 ° C. In a high temperature machine, the aqueous rinse is sprayed at a rate of 3.78 to 9.46 by movement at a temperature of about 65.5 to 87.7 ° C. This rinse cycle can range from about 9 to about 60 seconds, preferably from about 9 to 30 seconds to ensure that the dishes are completely rinsed and disinfected in the rinse step. The term "disinfect" which is used in the description and methods of the invention, indicates a reduction in the population of numbers of unwanted microorganisms by orders of 5 of magnitude or greater (99.999% reduction) after an exposure time of 30 seconds. In other words, 99.999% of the population of microbes, present in a test site, was removed using the composition of the invention, as measured by Germicidal and Detergent Sanitizing Action of Desinfectants, Official Methods of Analysis of the Association of Official Analytical Chemists, paragraph 960.09, and applicable to subparagraphs, 15th. edition.

WORK EXAMPLES The following examples are intended to illustrate the invention and should not be constructed to limit its scope. One skilled in the art will readily recognize that these examples suggest many other ways in which the invention can be practiced, EXAMPLE OF WORK 1 A permeate-based rinse agent was prepared with the following formulation: Starting material% / P Acetic acid 30.0 Hydrogen peroxide (30% by active weight) 26 DEQU EST®2010 1 .5 (1-Hydroxyethylidin-1,1-diphosphonic acid) Sodium alkyl sulfonate (30% w / v) 16.67 Noiónico Pturafac LF131 15.0 Octanoic acid 4.0 Water 6.83 After a two-week equilibration, the formula contained approximately 5.6% by weight of hydrogen peroxide (calculated on an active base of 100%) and a total of 5.3% of peracid (peracetic and combined peroctanoic). The formulation was used at a level of 4 milliliters of rinse aid per article support (30 parts per million total peracid in the aqueous rinse). This concentration provided sufficient disinfecting and sheeting action. The formulations made with the peracid material showed that they produce substantially no corrosion, but under certain circumstances produced a somewhat light yellowing. Similar formulations prepared without any peracid precursor material with a rinsing agent and using sodium hypochlorite as a source of active Cl2, used at a concentration of 50 parts per million active chlorine and 100 parts per million active chlorine, showed a marked darkening after one cycle and a uniform gray-black appearance after 5 cycles. At a concentration of 100 ppm of active chlorine, the grayish and dark appearance appeared more rapidly.

WORK EXAMPLE 2 A corrosion test was carried out, using the composition formulated in Work Example 1. Three spoons of silver plate were placed in a dishwasher at low temperature. As the machine was filled for rinsing four more were added. of auxiliary rinse disinfectant. At the end of each cycle, the silver was rubbed, moderately, to dry. Each cycle was carried out using a Detergent (U ltra Klene Plus), and city water.

Temp. Temp. Eniuaaue Wash Cycle 1 54.4 ° C 58.8 ° C 2 55.5 ° C 62.2 ° C 3 56.6 ° C 53.3 ° C 4 48.8 ° C 44.4 ° C 5 60 ° C 57.2 ° C After five cycles no effect on the spoons of silver plate.

WORK EXAMPLE 3 After carried out a test to verify the effect of chlorine against the composition of the invention on silver plate. Then the following compositions were formulated: EXAMPLE COMPOSITION 3A (CONTROL) Control - without chlorine, without peracid 3B (COM PARATIVO) Chlorine - 100 ppm + Ultra-Dry 3C (COM PARATIVO) Chlorine - 50 ppm + Ultra-Dry 3D (WORK) 4 mis. of the disinfectant rinse aid formulated in Example 1. The conditions of the analysis included the use of city water at a hardness of 102-1 10 ppm, in a low temperature machine. The detergent, (Ultra Klene Plus from ECOLAB), was used at a speed of 6 mis / support and was applied through auto injection. The chlorinated rinse aid (Ultra Dry from ECOLAB), was used at a rate of 1 ml / support, and was applied through auto injection. The silver plate used were knives and soup spoons of the trademark Oneida®. The chlorine source (Eco-San) had 8.3% active chlorine. The disinfectant rinsing aid used had 5.94% H2O2, 5.25% peracetic acid, with a total percentage of 3.90% of active oxygen added manually (4mls), while the machine was filled for rinsing.

RESULTS After 10 cycles, the chlorinated silver articles underwent a dramatic change in appearance and corrosion. The peracid system changed little in the articles after 10 cycles.

APPEARANCE OF SILVER AFTER THE TRIAL EXAMPLE EXAMPLE EXAMPLE EXAMPLE DE DE DE DE # WORK WORK WORK WORK Washes 3A 3B 3C 3D Gray gray Gray gray Yellow very uniform uniform, very light uniform, slightly glossy brightness Dull gray Gray gray Yellow very uniform, uniform, light dull some gloss 10 Same as initial yellowing WORK EXAMPLE 4 An analysis of the antimicrobial nature of the composition of the present invention was carried out, using Germicidal and Detergent Sanitizing Action of Disinfectants, (AOAC Official Methods of Analysis, 15th edition), with a test temperature of 48.8 ° C ± -17.5 ( for S. aureus). and 48.8 ° C ± -17.6 ° C (for E. coli).

The flasks were tempered at least 10 minutes before the test and with a 30 second exposure time from the test system to the test substance. The post-test incubation was 48 hours at 37 ° C ± 0.5 ° C. The test solution for Working Examples 4A to 4C comprised: Constituent 5 in weight H2O2 6.90 Peroxyacetic acid 4.40 Octanoic acid 3.90 (including peroxioctanoic acid) Inert ingredients 84.80 (including vehicle) Each dilution of test substance was tested in triplicate. 99 mi were dispensed. of the use solution in sterile flasks and were tempered at 48.8 ° C at 9:35 a.m. Twenty minutes later, 9:55 a. m. , 1.0 ml of the test solution was added to each flask. After 30 seconds of exposure, 1 .0 ml of the test / substance system was transferred to 9.0 ml of neutralizer. Tubes were laminated, using serial dilutions and plaque casting techniques. The surviving numbers of the test system are an average of the results of the three flasks.

RESULTS The calculation for the reduction percentage is as follows. % Reduction = control numbers - surviving numbers x (100) control numbers Staphylococcus aureus (ATCC 6538) Numbers of Control Exemplary Numbers Control Survivors% Reduction Work # cfu / ml # cfu / ml 4A 87X106 < 10 > 99,999 4B 87X106 < 10 > 99,999 4C 87X106 < 10 > 99,999 Escherichia coli (ATCC 11229) Numbers of Surviving Control Example Numbers% Reduction Work # cfu / ml # cfu / ml 4A 116X106 < 10 > 99,999 4B 116X108 < 10 > 99,999 4C 116X106 < 10 > 99,999 The composition of the invention has demonstrated a disinfecting effectiveness of contact with food at 48.8 ° C, when diluted to 28.35 grams by 52.97 liters of 550 ppm of synthetic hard water (as CaCO3) or at a concentration of 0.056% with an exposure time from 30 seconds to 48.8 ° C ± - 17.5 ° C, providing > 99.999%, in the numbers of the test system. The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many modifications of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims annexed below.

Claims (2)

1. CLAIMS A method for disinfecting and dismantling earthenware products, said method comprising the step of applying, during the rinsing step, at least about 100 ppm of a disinfectant and stain removal concentrate composition comprising: (a) of about 0.5 % by weight to 25% by weight of peroxycarboxylic acid; (b) from about 5% by weight to 75% by weight of carboxylic acid, wherein said carboxylic acid comprises a mixture of octanoic acid and acetic acid; (c) from about 1% by weight to 40% by weight of hydrogen peroxide; and (d) the remainder of a vehicle; wherein said composition of disinfectant and stain removal concentrate is non-corrosive and non-film forming with said earthenware products.
2. 2. The method according to claim 1, wherein the disinfectant and stain removal concentrate composition is applied to the faience products in a concentration ranging from about 100 ppm to 2000 ppm. 3. - The method according to claim 1, wherein the composition of disinfectant concentrate and stain remover is applied in an automatic machine for dishwashing. 4 - The method according to claim 3, wherein the automatic dishwashing machine applies the concentrate composition at a temperature ranging from about 48.8 ° C to 60 ° C. 5. The method according to claim 3, wherein the automatic dishwashing machine applies the concentrate composition at a temperature of about 82.2 ° C to 90.5 ° C. 6. The method according to claim 1, wherein the composition of disinfectant concentrate and stain remover is used in a manual pro. 7. The method according to claim 6, wherein the manual pro applies the disinfectant and spotting concentrate composition at a temperature ranging from about 20 ° C to 35 ° C. 8. The method according to claim 1, wherein the composition of disinfectant and stain removal concentrate is applied in combination with a surfactant rinsing aid. 9. The method according to claim 8, wherein the composition of disinfectant and stain removal concentrate and rinsing aid are intermixed before application. 10 - The method according to claim 8, wherein the disinfectant and stain removal concentrate composition and the rinsing aid are separately applied at the same time during application. The method according to claim 1, wherein the acetic acid is present in a ratio ranging from about 20 to 1 to about 1 to 2 relative to the octanoic acid. 12. The method according to claim 1, wherein the peroxycarboxylic acid comprises the reaction product of carboxylic acids and hydrogen peroxide. 13. The method according to claim 1, wherein the peroxycarboxylic acid comprises the reaction product of the carboxylic acid and the hydrogen peroxide, wherein the acetic acid is present in a ratio ranging from about 10 to 1 to about 1 to 1 in relation to octanoic acid. 14. The method according to claim 1, wherein the rinse disinfectant and stain remover composition further comprises a solubilizer. 15. The method according to claim 14, wherein the solubilizer comprises an n-alkyl sulfonate. 16. The method according to claim 1, wherein the composition of disinfectant concentrate and stain remover comprises a sequestering agent. 17. - A method for disinfecting and deburring silver articles, the method comprising the steps of applying, during the rinsing step, a composition of disinfectant concentrate, stain remover to silver articles at a rate of 100 ppm to 2000 ppm, the composition of disinfectant concentrate, stain remover, comprising: (a) from about 1% by weight to 20% by weight of a C?-6¡ (b) peroxycarboxylic acid of from about 10% by weight to 50% by weight of a mixture of carboxylic acid comprising acetic acid and octanoic acid; (c) from about 3% by weight to 35% by weight of hydrogen peroxide; and (d) the remainder of a vehicle; where the composition of disinfectant concentrate and stain remover is non-corrosive and does not form a film with the products of earthenware. 18. The method according to claim 18, wherein the composition of disinfectant concentrate and stain remover is applied in an automatic dish washing machine. 9. The method according to claim 18, wherein the disinfectant and spotting concentrate composition is applied at a temperature ranging from about 48.8 ° C to 60 ° C. 20. The method according to claim 18, wherein the disinfectant and spotting concentrate composition is applied at a temperature of about 82. 2 ° C to 90.5 ° C. 21. The method according to claim 17, wherein the composition of disinfectant and stain removal concentrate is applied to the silver articles, manually, at a temperature ranging from about 20 ° C to 35 ° C. 22. The method according to claim 17, wherein the composition of disinfectant and stain removal concentrate is applied in combination with a surfactant rinsing agent. 23. The method according to claim 22, wherein the surfactant rinsing agent is separately co-dispensed with the disinfectant and spotting concentrate composition. 24. The method according to claim 22, wherein the surfactant rinsing agent is intermixed with the composition of disinfectant and stain removal concentrate before dispensing. 25. The method according to claim 17, wherein the silver articles are washed before being subjected to the composition of disinfectant concentrate, stain remover. 26. The method according to claim 17, wherein the disinfectant and stain remover composition comprises an n-alkyl sulfonate solubilizer. 27. The method according to claim 17, wherein the composition of the concentrate and spot remover comprises a sequestering agent. 28. - A method for disinfecting and spotting silver articles, the method comprising the steps of applying, during the step of rinsing, a composition of disinfectant concentrate, stain remover to silver articles at a rate of 1 00 ppm to 2000 ppm , the composition of disinfectant concentrate, stain remover, comprising: (a) from about 1% by weight to 20% by weight of a mixture of peroxyacetic acid and peroxyoctanoic acid; (b) from about 10% by weight to 50% by weight of carboxylic acid comprising a mixture of acetic acid and octanoic acid, acetic acid and octanoic acid present in a ratio ranging from about 10 to 1 to about 1 to 1, respectively; (c) from about 3% by weight to 35% by weight of hydrogen peroxide; (d) from about 1 to 20% by weight of a solubilizer; and (e) the remainder of a vehicle, wherein the peroxycarboxylic acid comprises the reaction product of acetic acid, octanoic acid and hydrogen peroxide; wherein the composition of disinfectant and disinfectant concentrate is non-corrosive and does not form a film with the products of earthenware. 29. - The method according to claim 28, wherein the composition of disinfectant concentrate, stain remover is applied in an automatic machine to wash dishes. 30. The method according to claim 29, wherein the disinfectant and stain remover rinse composition is applied at a temperature ranging from approximately 48.8 ° C to 60 ° C. 31. The method according to claim 29, wherein the disinfectant and spotting concentrate composition is applied at a temperature ranging from about 82.2 ° C to 90.5 ° C.