ES2261952T3 - LIQUID CLEANING COMPOSITIONS. - Google Patents

Abstract

Procedure for removing oily dirt from a hard surface, the series process comprising the steps of: (a) treating the hard surface with a liquid cleaning composition comprising 0.1-10% by weight of hydrogen peroxide and 0 , 05% -10% by weight of a natural radical elimination antioxidant comprising a substructure of 3, 4, 5-trihydroxybenzoyl; (b) allow grease dirt to settle; and (c) clean the surface to remove grease dirt.

Description

Liquid cleaning compositions.

Field of the Invention

The present invention relates to compositions cleaning fluids comprising antioxidants and peroxides and at a procedure to clean hard surfaces using these compositions

Background of the invention

Household surfaces are cleaned normally using compositions containing one or more components that help the removal of oily / oily / greasy dirt and / or any visible stain such as from solid waste Associates or colored material. Such compositions can be applied. pure or in dilute solutions, pouring or as a spray, such as from a spray dispenser with trigger or other spray applicator, and rub with a cloth or other cleaner, optionally followed by rinsing.

The document JP-A-07 / 228,892 describes hard surface cleaning compositions comprising amphoteric and anionic surfactants, a mono alcohol or polyhydroxylated and from 0.1% to 7% by weight of extract tea leaf Tannins are normally known to be a component of tea, but tannic acid (an antioxidant) is present only in very small amounts in such extracts. It is said that the tannins they generally adversely affect cleanliness, especially of oily dirt

Other descriptions of the use of tea extracts or other sheets in disinfectant products and / or cleaners hard surfaces are in the documents JP-A-07 / 228,890 and '891, JP-A-08 / 104,893, JP-A-10 / 273.698, JP-A-11 / 100,596, JP-A-06 / 340.897, JP-A-63 / 196.693, JP-A-62 / 167.400, JP-A-59 / -047.300 and US 4.220.676, although the products described in the last two do not contain surfactants

US 5,965,514 describes compositions for cleaning slightly acidic hard surfaces that contain amine oxide surfactant, quaternary disinfectant and a chelating agent containing nitrogen.

Ascorbic acid is mentioned among a large number of possible acids to provide acidity, but do not enter the preferred ones Tannic acid is mentioned as one of a great number of optional possible acids useful as reducing agents surface tension

An anti-fogging agent is described for crystals in the document JP-A-49 / 113,811. This one includes in weight, 3% dialkyl sulphosuccinate anionic surfactant, 4% anionic surfactant of secondary alkoxyethyl sulfate superior, 1% tannic acid, 10% propylene glycol, 5% Isopropyl alcohol and 77% water.

US 5,602,090 describes compositions cleaning agents containing easily oxidizable terpenes such as Limonene and hydrogen peroxide. The example formulations contain 0.02% butylated hydroxyanisole as a antioxidant

EP 209228, WO 97/02331, EP 844302, EP 1069178 and describe tissue bleaching compositions comprising a surfactant, a peroxide bleach such as hydrogen peroxide and several radical scavengers. They have mentioned propyl gallate, butyl hydroxyanisole e Partially hindered substituted hydroxybenzenes. They have mentioned as additional components ascorbic acid and esters of ascorbyl US 6,110,883 describes compositions similar that have a pH higher than 8.

They are described in US 6,296,880 pharmaceutical skin cleansing compositions to treat various skin states. The compositions contain a acid compound as tannic acid, preferably in an amount of at least 1%, a certain amount of hydrogen peroxide and a antimicrobial agent in an amount sufficient to reduce microorganisms in the skin. In addition the compositions may include antioxidants

However, it has not yet been described in the prior art than treating a surface with a antioxidant have some positive effect on elimination after the oily dirt deposited after that in that surface.

EP 447553 describes compositions of bleaching to clean hard surfaces comprising peroxide hydrogen or a precursor thereof, a peracid precursor that produces peracid with hydrogen peroxide and optionally a surfactant The peracid precursor is a carboxylic acid araliphatic or alkoxylated aliphatic. The peracid occurs immediately before the use of the composition mixing the peroxide of hydrogen (or precursor) with the peracid precursor at a pH of 5-13. Therefore, hydrogen peroxide and peracid precursor should be stored separately. It adds optionally an antioxidant to the peracid precursor to avoid premature oxidation

While it is known that hydrogen peroxide can be used to bleach colored dirt and stains on hard surfaces, it has been surprisingly found that in addition hydrogen peroxide generally helps in eliminating the dirt (colored or not) of hard surfaces.

It has also been surprisingly found that certain antioxidants when present on a surface hard, prevent oily dirt deposited later on that surface adheres to it and thus facilitates the subsequent removal of oily dirt.

It has been found even more surprisingly that when hydrogen peroxide is present and these antioxidants together in a cleaning composition of a liquid, both activities are conserved independently without interfering hydrogen peroxide with antioxidant activity and vice versa. Also, the compositions are stable in storage. no loss of the activity of the antioxidant or peroxide of hydrogen during storage.

In addition, there is a preference among consumers towards soft components in cleaning compositions, and natural components, more particularly antioxidants natural, they are generally considered to be soft.

Brief Description of the Invention

Therefore, in one aspect the present invention provides a procedure to remove fatty dirt from a hard surface, comprising the serial procedure, the stages from:

(to)

          treat the hard surface with a cleaning composition liquid comprising 0.05% -10% by weight of an antioxidant natural radical elimination comprising a structure of 3,4,5-trihydroxybenzoyl and the 0.1-10% by weight of hydrogen peroxide;

(b)

          allow grease dirt to settle; Y

(C)

          Clean the surface to remove grease dirt.

A second aspect of the present invention provides a liquid cleaning composition comprising the 0.1-10% by weight of hydrogen peroxide and the 0.05-10% by weight of a natural antioxidant of radical elimination comprising a substructure of 3,4,5-trihydroxybenzoyl, with the proviso that the composition does not contain bactericides (other than peroxide hydrogen) in an adequate amount to provide an action Antibacterial on the skin.

A third aspect of the invention provides the use of a natural radical elimination antioxidant that has a substructure of 3,4,5-trihydroxybenzoyl and hydrogen peroxide in a liquid cleaning composition for facilitate the removal of fatty dirt from a hard surface that has been deposited on the surface after treatment with the liquid cleaning composition.

Detailed description of the invention

Although it is not restricted by any theory or particular explanation, it is believed that the antioxidant removal of radicals exerts its effect being retained on the surface in stage (a), such that the fatty dirt deposited subsequently on the surface in step (b) it does not harden or polymerizes, thereby allowing easier removal of the dirt on stage (c). Therefore, an embodiment of the first aspect of the invention comprises the formation of a film that comprises the antioxidant in step (a), for example by letting it dry on the surface a solution or liquid composition that It comprises the antioxidant and hydrogen peroxide. Stage (c) is advantageously performed using a cleaning composition of hard surfaces that comprises again the antioxidant and the hydrogen peroxide so that dirt is removed and it apply a new antioxidant at the same time, thus combining effectively step (c) of the first procedure according to the first aspect of the invention with step (a) of a process posterior according to this aspect of the invention. Stage (c) is followed optionally by a rinsing stage, usually with water.

Again, although it is not restricted by any theory or explanation it is believed that hydrogen peroxide helps generally in the removal of dirt by decomposition of hydrogen peroxide on the surface thus generating tiny oxygen bubbles that help to release and to raise surface dirt.

The antioxidant in the liquid composition used In the procedure it is a natural antioxidant removing radicals comprising a structure of 3,4,5-trihydroxybenzoyl. Liquid composition comprises 0.05-10% by weight of said antioxidant, preferably 0.1% -10% by weight, more preferably at least the 0.2% Amounts greater than 2% or even at 1% and are generally generally less than 1% or even at most 0.5. Mixtures of antioxidants

The composition used in the procedure also comprises hydrogen peroxide in an amount of 0.1-10%, preferably at least 1%. I dont know generally require amounts greater than 5% and may cause damage to sensitive surfaces.

The composition used in the procedure optional, but preferably contains one or more surfactants such as described further herein below document. Additionally they may contain other components options conventionally used in the compositions of cleaning.

As used herein, the term "dirt" encompasses all types of stains or soils of organic and inorganic origin, whether visible or invisible to simple view, which includes dirt from solid and / or bacteria waste or other pathogens. As summarized, the invention is particularly effective for easier removal of dirt grease, more specifically aged or dry fat dirt. Usually such fatty dirt, as is often found in kitchen surfaces, comprising an oil / grease component in combination with other dirt components such as debris from Protein and / or starchy food, dust, deposits lime inlay, etc. The invention is also effective for the removal of lime scale, watermarks and stains Similar.

Also the present invention can provide one or more benefits such as improved tactile surface properties (eg, smoothness) during and / or after cleaning, reduction of rancid smell and less darkening of dirt before cleaning, less corrosion of the surface and less noise during the
cleaning.

The methods, uses and compositions and others Products according to the present invention are useful for treating any domestic hard surface in, for example, kitchens and bathrooms that include cooktops, hoods extraction, work surfaces, cooking utensils, crockery, tiles, floors, bathtubs, toilets, sinks, showers, dishes shower, faucets, sinks, and glass and enamel surfaces in general. These surfaces may consist, for example, of paint (for example lacquered or painted wood), plastics, glass, ceramic or metal (for example stainless steel or chrome).

Antioxidants

As described in Ingold K.V. Adv.Chem.Ser. 75, 296-305 (1968) "Inhibition of Auto-oxidation ", antioxidants are classified in two groups, namely antioxidants with chain breakage or primaries that react with lipid radicals to form more stable radicals, and secondary (or preventive) antioxidants which reduce the speed of chain initiation by several mechanisms In addition, antioxidants can be classified as synthetic or "natural", that is derivatives from natural products.

The following are classes, subclasses and specific examples of antioxidants, which can be used in methods, uses, articles and compositions according to the present invention. As used herein, the term "antioxidant" in singular encompasses an antioxidant as well as two or more antioxidant materials in combination.
tion.

Antioxidant structure

Antioxidants for the purpose of this invention they are natural antioxidants that contain a substructure of 3,4,5-trihydrixibenzoyl or substituted derivatives of same. Therefore, gallic acid and its natural derivatives are adequate. Particularly suitable are tannic acid and Tannins Tannic acid and tannins contain a plurality of 3,4,5-trihydroxybenzoyl units by means of which the benzoyl group of a unit forms an ester bond with a Phenolic oxygen from the next unit.

Tannic acid is the most preferred antioxidant for the purposes of this invention. It is sometimes indicated as acid galvanic or penta (m-digaloil) -glucose (C_ {76} H_ {52} O_ {46}). However, it is usually obtained tannic acid commercially available from plants or gills, tree barks and other parts of the plant. The term "tannic acid" as used herein is going to be taken to cover all such materials. As it has already been mentioned, tea extracts containing tannin (for example as used in document compositions JP-A-07 / 228,892) are very low in the Tannic acid content.

Liquid compositions

The compositions can be applied to the surface in diluted or pure form. Suitable liquid compositions include solutions, dispersions or emulsions of the material antioxidant in a solvent. The solvent is preferably water, or a mixture of an organic solvent and water.

Preferred compositions have a neutral pH or slightly acidic, i.e. a maximum of 7, preferably as maximum of 6, especially maximum of 5.5 or even 4.5 or lower. However, it is preferred that the compositions should not be too acidic, in order to avoid damage to surfaces acid sensitive; preferably the pH is at least 1.5 or even 2, more preferably at least 2.5. Plus preferably, the pH is in the region from 3 to 4.5.

The liquid composition may be in the form. of a viscous or diluted liquid or gel or foam, mousse of pasta It is especially preferred that the liquid be viscous or similar to a gel that has a viscosity of at least 100 mPas, preferably at least 150 or even 200 mPas, as measured at a cutting speed of 21 s -1 (Brookefield viscometer, 20 ° C), but preferably no more than 5,000 mPas, more preferably at most 2000 mPas. Viscous liquids or gels dilution by cutting increase the pleasant sensory effect of antioxidant while cleaning a hard surface and are particularly attractive to the consumer and therefore a preferred embodiment of the invention. Viscosity can be triggered by an "internal structuring system" using one or more surfactants, water, and (normally) electrolytes, to create a liquid or ordered crystalline phase in the composition. Alternatively or additionally, a thickening polymer, many of them are known in the technique, for example polymers of the polycarboxylate type such such as poly (meth) acrylates, poly (maleic acids) and copolymers of (meth) acrylic acid and / or maleic anhydride with various other vinyl monomers, or polysaccharides such as cellulose derivatives or vegetable or microbial gums for example xanthan gum, guar gum and the like. Of course the polymers Thickening should be stable in the presence of peroxide hydrogen.

Foams and mousses are normally supplied to from a dispenser that gasifies or aerates the product dispensed from it.

Preferred compositions are either low foaming, whether they form foam or are applied as a foam, the foam easily collapses, thus ignoring the need to rinse or subsequently clean the surface of New to remove foam. Therefore, the amount of antioxidant remaining on the surface.

Surfactants

A composition according to (or for use in) the invention may comprise detergent surfactants that are chosen generally of anionic, nonionic, amphoteric surfactants, zwitterionic or cationic. Generally the compositions they comprise at least 0.05%, preferably at least 0.1, the 0.2, 0.5 or even 1% by weight, but not more than 45%, normally a maximum of 25, 15 or even 10% by weight of total surfactant Preferably the compositions comprise the less an anionic and / or non-ionic surfactant, more preferably at less a nonionic surfactant.

Anionic surfactants (not soapy) Suitable synthetic are water soluble salts of acid ester organic sulfuric acid and sulfonic acids that have in the structure molecular an alkyl group containing from 8 to 22 atoms of carbon.

Examples of such anionic surfactants are water soluble salts of:

-

       alcohol sulfates (for example 8-22 atoms of C) long chain (primary) (referred to below in the present document as PAS), especially those obtained by sulfation of fatty alcohols produced by reducing tallow glycerides or coconut oil;

-

       alkylbenzenesulfonates, such as those in which the group alkyl contains from 6 to 20 carbon atoms;

-

       secondary alkanesulfonates;

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Also suitable are salts of:

-

       alkyl glyceryl ether sulfates, especially ethers of fatty alcohols derived from tallow or coconut oil;

-

       fatty acid monoglyceride sulfates;

-

       sulfates of the reaction product of one mole of a fatty alcohol and of from 1 to 6 moles of ethylene oxide;

-

       salts of ethyleneoxy ether sulfates of alkylphenol with from 1 to 8 units per ethyleneoxy molecule per molecule and in which the alkyl groups contain from 4 to 14 atoms of carbon;

-

       the reaction product of fatty acids esterified with acid isethionic and neutralized with a base;

and mixtures of those mentioned above.

Soluble synthetic anionic surfactants Preferred in water are alkali metal salts (such as sodium and potassium) and alkaline earth metals (such as calcium and magnesium) of alkylbenzenesulfonates and mixtures with olefin sulfonates and alkyl sulfates, and fatty acid monoglyceride sulfates. The most preferred anionic surfactants are aromatic alkyl sulphonates such as alkylbenzenesulfonates containing from 6 to 20 atoms of carbon in the alkyl group in a linear or branched chain, particular examples of which are sodium salts of alkylbenzenesulfonates or alkyl toluene, xylene or phenolsulfonates, alkylnaphthalene sulfonates, ammonium diamilnaphthalene sulfonates, and dinonyl naphthalene sulfonate sodium.

If the synthetic anionic surfactant is going to used, the amount present in the compositions of the invention, will generally be at least 0.2%, preferably at less than 0.5%, more preferably at least 1.0%, but not more 20%, preferably at most 10%, more preferably at most 8%.

Suitable nonionic surfactants can described in general terms as compounds produced by the condensation of alkylene oxide groups that are of hydrophilic nature, with an organic hydrophobic compound that can be aliphatic or alkylaromatic in nature. The length of the hydrophilic or polyoxyalkylene radical that is attached to any particular hydrophobic group can be easily adjusted to give a water soluble compound that has the desired balance between hydrophilic and hydrophobic elements. This enables the choice of nonionic surfactants with the appropriate HLB.

Particular examples include the product of condensation of aliphatic alcohols having from 8 to 22 carbon atoms in chain configuration either linear or branched with ethylene oxide, such as oxide condensates of ethylene - coconut oil that have from 2 to 15 moles of oxide of ethylene per mole of coconut alcohol; alkylphenol condensates whose alkyl group contains from 6 to 12 carbon atoms with 5 to 25 moles of ethylene oxide per mole of alkylphenol; condensates of the reaction product of ethylenediamine and oxide propylene with ethylene oxide, containing the condensates from the 40 to 80% of ethylene oxyl groups by weight and having a weight molecular from 5,000 to 11,000.

Other examples are: alkyl glucosides that are condensation products of long chain aliphatic alcohols and saccharides; tertiary amine oxides of RRRNO structure, in which one R is an alkyl group of 8 to 18 carbon atoms and the other R are each alkyl or hydroxyalkyl groups of 1 to 3 atoms of carbon, for example dimethyldodecylamine oxide; phosphine oxides tertiary structure RRRPO, in which an R is an alkyl group from 8 to 18 carbon atoms and the other R are each groups alkyl or hydroxyalkyl of 1 to 3 carbon atoms, for example dimethyl dodecylphosphine oxide; Y dialkylsulfoxides of RRSO structure in which an R is a group alkyl of from 10 to 18 carbon atoms and the other is methyl or ethyl, for example methyltetradecylsulfoxide; acid alkylamides fatty; alkylene oxide condensates of acid alkylamides fatty and alkyl mercaptans. Alcohols are particularly preferred ethoxylated aliphatics.

The amount of nonionic surfactant that is going to used in the cleaning composition of the invention will be preferably at least 0.1%, more preferably at least 0.2%, most preferably at least 0.5 or even 1% in weigh. Suitably the maximum amount is 15%, preferably 10% and most preferably 7%.

The compositions may contain amounts of both anionic and nonionic surfactants that are chosen, having take into account the level of electrolyte present, so that provide a structured liquid detergent composition, it is say one that is "self-thickened." So, despite the presence of the organic solvent, they can be prepared thickened liquid cleaning compositions without the need for employ any additional thickening agent that nevertheless They have a long service life over a wide range of temperatures

The weight ratio of the anionic surfactant with regarding the non-ionic surfactant may vary, taking into account the above considerations, and will depend on their natures, but it is preferably in the range of from 1: 9 to 9: 1, more preferably from 1: 4 to 4: 1. According to an embodiment that illustrates any aspect of the invention, the compositions may comprise from 0.1% to 2% by weight of antioxidant (s), from 1 to 4% by weight of peroxide hydrogen, from 0 to 20%, preferably from 0.2% up to 10% by weight of a sulphonate surfactant salt or water-soluble synthetic anionic sulfate containing a radical alkyl having from 8 to 22 carbon atoms in the molecule, and from 0.2 to 7% by weight of a non-ionic surfactant ethoxylate derived from the condensation of an aliphatic alcohol that it has from 8 to 22 carbon atoms in the molecule with oxide of ethylene, so that it has condensate from 2 to 15 moles of ethylene oxide per mole of aliphatic alcohol, the rest other optional components and water.

Suitable amphoteric surfactants that can optionally used are derivatives of secondary amines and aliphatic tertiary containing an alkyl group of 8 to 18 carbon atoms and an aliphatic group substituted by a group anionic that is solubilized in water, for example Sodium 3-Dodecylamino-Propionate, Sodium 3-dodecylaminopropanesulfonate and N-2-hydroxidedecyl-N-methyl-taurate of sodium.

Suitable cationic surfactants that can optionally be used are quaternary ammonium salts that they have one or two aliphatic groups of from 8 to 18 atoms of carbon and two or three small aliphatic groups (for example methyl), for example cetyltrimethylammonium bromide.

Suitable zwitterionic surfactants that may optionally be used are derivatives of compounds of aliphatic phosphonium, sulfonium and quaternary ammonium having a aliphatic group of from 8 to 18 carbon atoms and a group aliphatic substituted by an anionic group that is solubilized in water, for example betaine from propane-1-sulphonate 3- (N, N-dimethyl-N-hexadecylammonium), propane-1-sulfonate betaine from 3- (dodecylmethylsulfonium) and ethanesulfonate betaine from 3- (cetylmethylphosphonium).

Additional examples of suitable surfactants they are compounds normally used as surface active agents provided in well-known textbooks "Surface Active Agents "vol. 1, by Schwartz & Perry, Interscience 1949, vol. 2 by Schwartz, Perry & Berch, Interscience 1958, in the edition news of "McCutcheon’s Emulsifiers and Detergents" published by Manufacturing Confectioners Company or in "Tenside-Taschenbuch", H. Stache, 2nd edition., Carl Hauser Verlag, 1981.

The compositions according to the invention can contain other components that help in its cleaning function. By example, the composition may contain detergent adjuvants such as nitrilotriacetates, polycarboxylates, citrates, acids dicarboxylic, water soluble phosphates (especially ortho, pyro or polyphosphates or mixtures thereof), zeolites and mixtures thereof themselves in an amount of up to 25%. If present, the adjuvant will preferably form at least 0.1% of the composition.

Metal ion sequestrants such as ethylenediaminetetraacetates, polyphosphonates (DEQUEST [TM] range) and the (ortho, pyro, poly) phosphoric acids / phosphates (referred to collectively below in this document as "phosphate"), and a wide variety of organic acids polyfunctional (particularly citric acid) and salts, they can also be used optionally as long as they are compatible with the antioxidant Such sequestrants are particularly useful. when combined with antioxidants that can form complexes colored with metals, such as tannic acid, tannins and gallic acid and derivatives. The amount of such sequestrants, if present, is useful between 0.05 and 5% in composition weight, preferably of 0.1-1%

An additional optional component for compositions according to the invention is a material that regulates the foam, which can be used in compositions that have a tendency to produce excessive foam in use.

An example of a foam regulating material It is the soap. Soaps are salts of fatty acids and include alkali metal soaps such as sodium salts, potassium and fatty acid ammonium containing from about 8 up to 24 carbon atoms, and preferably from about 10 to 20 carbon atoms. Particularly useful are the salts of sodium and potassium and of mono, di and triethanolamine mixtures of fatty acids derived from coconut oil and celery oil tuberous. When used, the amount of soap can form at minus 0.005%, preferably at least 0.1% by weight of the composition. It has been found that such fatty acid soaps as Prifac 7901 [TM] they are suitable for this purpose.

An additional example of a material that regulates The foam is a silicone oil. If a co-solvent is present of hydrocarbon at a sufficiently high level this can provide yourself with some or all of the antifoam activity desired.

The compositions according to the invention can also contain, in addition to the components already mentioned, others various optional components such as dyes, bleaches, optical brighteners, dirt suspending agents, enzymes detersives, gel control agents, stabilizers freeze-thaw, preservatives (for example 1,2-benzothiazolin-3-one), and hydrotopes. However, the compositions according to the invention do not contain bactericides (other than hydrogen peroxide) in adequate amounts to provide an antibacterial action on the skin. Generally, bactericides, if present, they are used in quantities necessary to prevent microbial deterioration of the composition.

As the compositions according to the invention and their uses to clean hard surfaces depend on the presence of hydrogen peroxide, do not contain aliphatic carboxylic acids or alkoxylated araliphatics as precursors for the corresponding peracids

Dispensing

Liquid compositions can be stored and dispensed by any suitable means, such as by spray applicators Pump dispensers (whether pumps of spray or no spray) and liquid applicators (bottles, etc.) are also possible. The compositions can also be applied to the surface with a cloth impregnated with the liquid composition.

Examples

In the following examples, all percentages are by weight unless specifically indicated
contrary.

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Example one

General purpose cleaning composition

Biodac L6S50 (no ionic) 1.2% THE (anionic) 3.5% Acid tannic 0.50% Peroxide hydrogen 3.0% Acid phosphoric 0.42% Hydroxide sodium 0.046% Urea 1.0% Fragrance 0.35% Dequest 2046 0.10% Coconut Fatty Acid (Prifac 7901 [TM]) 0.30% Water Until the 100%

Control 1

As example 1 but without tannic acid

Evaluation Substrate Details

A stainless steel substrate was used for the Cleaning tests This was a brushed stainless steel with size 380 mm by 300 mm (sheet BS 1449 Pt2 1983 of category 304, supplied by Merseyside Metal Services Ltd). The tile of This size houses two areas to clean, one on the left and another to the right of the tile. Each of the areas to clean is 215 mm by 150 mm.

Pre-cleaning of stainless tiles

The tiles were previously cleaned before a cleaning experiment as follows:

?

        Abrasive cleaner commercial liquid (Jif Cream cleaner), cleaning with a J cloth wet and rinsed with hot water;

?

        Detergent for liquid dishwasher (Persil dishwasher liquid), cleaning with a J cloth damp and rinsed with hot water;

?

        Calcite, cleaning with a rag J wet and rinsed with hot water, and finally rinsed with demineralized water;

?

        After allowing it to dry the tiles, clean with a paper towel, making sure that all deposits of calcite

Application of a pretreatment to steel tiles stainless

A cardboard holder was placed revealing the two areas of the tile to be pretreated on the steel tile stainless. To one of the areas of 215 mm by 150 mm, it was applied approximately half of a 0.1 ml aliquot pipetted from a example composition in a line through the upper section of 150 mm of the pretreatment area. The remaining part of the 1.0 ml example composition was applied similarly to the 150 mm lower section of the area. The cardboard holder is carefully removed from the steel tile in readiness to clean the applied prototype over the pretreatment area whole A hand-drained damp J [TM] cloth was folded (water demineralized) around a 150 mm plastic ruler. This of use to extend the 1.0 ml aliquot of the composition to be I was testing on the steel surface. The prototype is extended using four linear cleanings over the designated area, two cleanings down and two up, and in each case it They prepared four replicas for cleaning. After the pretreatment application, the tiles were allowed to dry during 2 hours before spraying them with castor oil dirt dehydrated.

Dirt and aging of stainless steel tiles pretreated

Dirt spraying was carried out of castor oil in a gas hood under normal conditions to ensure good reproducibility between the different experiments The dirt was dehydrated castor oil with the 0.2% dye 7B fatty red. This one was stored in the fridge When it was not used. It was equilibrated to room temperature before grind up.

The walls / floor of the gas hood and the Laboratory easel were covered with paper towels. It was used a lab stand to raise the tile to a height spray practice. The height of the easel of laboratory was 200 mm and was placed centered on the part back of the gas hood. A line of 40 mm from the back wall of the gas hood over the top of the laboratory stand, this was used as the line of placement for each steel tile before spraying. TO from the 40 mm line on the lab stand, it was marked a 270 mm line, in parallel, at the base of the bell floor of gases This was where the Perspex spray guide was aligned when it was sprayed.

A filling spray gun was used for commercially available gravity to pulverize dirt Oily on the steel tile. The posterior quadrant of the gravity fill gun was rotated 360 ° C in the direction counterclockwise from the closed position and the lateral quadrant is broken 270º counterclockwise of the clock, again from the closed position. He held the gun gravity filling sprayer to a compressor unit air that was placed on the ground and a pressure of 25 was used psi. to spray this dirt on the steel tile. Be placed a clamp base on the gas hood to hold the spray gun when not in use. Oil dirt dehydrated castor was poured into the open gun container sprayer

The cardboard spray holder is fastened to a stainless steel tile and placed it so centered, in a horizontal position, on the easel of laboratory along the 40 mm line from the back of The gas bell The cardboard spray holder was a rectangular piece of cardboard, the same size as a tile of stainless steel, with two cutting areas sized 215 mm by 150 mm, one window area on the left side and the other on the side right, with a cardboard separating edge between the two windows. The Perspex spray guide was placed in front of the first window of the tile that was to be sprayed directly on the 270 mm line. This area of the tile was sprayed for a total of 35 seconds starting from the top, following the guide line of the spray. The time it took to spray from the top until the bottom was approximately 9 seconds, therefore the spray guide path was traced 4 times, for each area 215 mm by 150 mm that were to be sprayed. After the pulverization of the first area of the tile, the area was pulverized adjacent in exactly the same way, after realigning the guide of the Perspex spray in front of the second area. Once there was pulverized the entire tile twice, it was removed from the bell of gases and the spray support was carefully removed from cardboard. The pulverized tiles were stacked directly on a oven grill, separating each stainless steel tile using an aluminum ring spacer placed in each corner. These spacers allow each tile to be separated by 10 mm. When all the tiles were pulverized, they were placed collectively in the oven for aging.

The tiles aged at a temperature 85 ° C for 1.5 hours. The prepared tiles were not cleaned until the next day.

The effort used to eliminate the dirt from the test surface using a sponge cloth cellulose in equipment specifically built for the purpose that measure the effort in Ns. The cleaning composition used for remove dirt was the control composition 2. Therefore, the reduction in cleaning effort can only be attributed to Antioxidant in the pretreatment composition.

The results for the composition of example 1 and control 1 (corresponding to example 1 without tannic acid) is given in table I. The results given are geometric means of the 4 duplicate experiments.

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TABLE I

Treatment Average total effort (Ns) No treatment (not clean in 2 minutes) 8000 Control one 4500 Example one 30

Claims (16)

1. Procedure to remove dirt fat from a hard surface, the procedure comprising series the stages of:

(to)

          treat the hard surface with a cleaning composition liquid comprising 0.1-10% by weight of peroxide of hydrogen and 0.05% -10% by weight of an antioxidant of elimination of natural radicals comprising a substructure of 3,4,5-trihydroxybenzoyl;

(b)

          allow grease dirt to settle; Y

(C)

          Clean the surface to remove grease dirt.

2. Procedure according to claim 1, wherein also in step (C) a liquid cleaning composition comprising said antioxidant of elimination of radicals and hydrogen peroxide. 3. Procedure according to claims 1 or 2, wherein the antioxidant elimination of Radicals is tannic acid. 4. Procedure according to any one of claims 1-3, wherein the Liquid cleaning composition has a pH of 7 or lower. 5. Procedure according to any one of claims 1-4, wherein the Liquid cleaning composition comprises 0.1% -1% by weight of the antioxidant 6. Procedure according to any one of claims 1-5, wherein the cleaning composition comprises a surfactant. 7. Procedure according to any one of claims 1-6, wherein the surface Do not rinse after stage (a). 8. Liquid cleaning composition that comprises 0.1-10% by weight of peroxide of hydrogen and 0.05-10% by weight of an antioxidant of elimination of natural radicals comprising a 3,4,5-trihydroxybenzoyl substructure, with the condition that the composition does not contain bactericides (other than of hydrogen peroxide) in an amount suitable for Provide an antibacterial action on the skin. 9. Liquid cleaning composition according to claim 8, further comprising the 0.05-45% by weight of a surfactant. 10. Liquid cleaning composition according to claims 8 or 9, wherein the amount of the antioxidant It is 0.1% -1.0% by weight. 11. Liquid cleaning composition according to any one of claims 8-10, in the that the radical elimination antioxidant is tannic acid. 12. Liquid cleaning composition according to any one of claims 8-11, in the that the pH is 7 or lower. 13. Use of an antioxidant removal of natural radicals that has a substructure of 3,4,5-trihydroxybenzoyl and hydrogen peroxide in a liquid cleaning composition to facilitate the removal of fatty dirt from a hard surface that has been deposited on the surface after treatment with the cleaning composition liquid 14. Use according to claim 13, in the that the antioxidant is present in the cleaning composition in an amount of 0.1-10% by weight and peroxide of hydrogen in an amount of 0.1-10% by weight. 15. Use according to claims 13 or 14, in which the antioxidant is tannic acid. 16. Use according to any one of the claims 13-15, wherein the composition Liquid cleaning has a pH of 7 or lower.