OA18230A - Washing additive. - Google Patents

Abstract

The present invention relates to a washing additive comprising a lysine tetramethylene phosphonate (LTMP) and gluconic acid. The present invention also relates to a detergent composition comprising said additive and its use in the food industry, preferably in the beverage industry, and even more preferably in the brewing industry.

Description

WASHING ADDITIVE

OBJECT OF THE INVENTION [0001] The present invention relates to a washing additive suitable for cleaning reusable glass bottles. The present invention also relates to a method of cleaning reusable glass bottles using said additive, as well as to a detergent composition comprising said additive. This invention relates in particular to the food industry, preferably the beverage industry, and even more particularly to the brewing industry for cleaning glass bottles.

STATE OF THE ART [0002] The use of glass bottles for packaging liquids dates back to Antiquity. If plastic bottles have since appeared and compete to a large extent with glass bottles, they are still used today, in particular for the packaging of common food liquids, such as water, milk, wine, juices, sodas, and beers, as glass offers the advantage over plastic of being more inert. In addition, some glass bottles have the added advantage of being reusable.

[0003] Glass bottles sold are generally labeled so as to inform the consumer of their content. These labels are usually placed at least on the body of the bottle, preferably on the front, where they are attached with an adhesive.

[0004] When reusable, these bottles, once used, are collected and sent to factories where they are subjected, in special equipment called "washers", to one or more automated cleaning / soaking / rinsing cycles. The bottles are returned there in particular for greater cleaning efficiency. The final quality control is carried out by mirage (visual control in transparency).

[0005] Traditionally, bottle cleaning is carried out in an alkaline medium, using a caustic soda solution, and at temperatures of around 80 ° C. In order to facilitate cleaning and promote detachment of the label from bottles while preventing foaming in the equipment, provision is generally made.

adding one or more additives to the solution to form an effective detergent composition.

[0006] Among these additives, it has for example been proposed to use sequestering agents such as EDTA and / or dispersing agents such as phosphonates and polyacrylates. The use of polyol derivatives, in particular polymers of modified polysaccharides, alkoxylated derivatives of alcohols, esters, amines or amides have also been proposed.

[0007] The choice of the additive for preparing the effective detergent composition poses a number of technical difficulties for those skilled in the art. Indeed, to ensure maximum efficiency, an effective detergent composition must meet a number of technical criteria, which are often difficult to reconcile.

[0008] Thus, an effective detergent composition must allow not only interior but also satisfactory exterior detergency of the containers, in particular of the bottles. In other words, a detergent composition must allow the removal, on the external and internal surfaces of the containers or bottles, of liquid residues (beer, wine, fruit juice, milk, sodas, etc.), but also the elimination of deposits of biological elements or resulting from said biological elements such as bacteria or molds, that is to say fungi and yeasts, as well as organic and / or mineral residues and traces of these elements biological. In addition, to be effective, a detergent composition must also allow at the level of the outer surface of the containers, in particular the bottles, a detachment of the label and other marking elements fixed on the surface of the containers, as well as the elimination of glues and / or adhesives, while avoiding pollution of the washing baths, in particular due to the dissolution of the label, and in particular of the ink codes in these baths.

[0009] An effective detergent composition must also be able to be rinsed easily, that is to say it must avoid leaving traces, in particular of caustic soda, on the surface of the containers, in particular glass containers such as bottles. .

At the same time, an effective detergent composition must guarantee a certain protection of the integrity of the internal and external surface of the containers, in particular of glass bottles, by avoiding any phenomenon of degradation of the glass known to those skilled in the art. art under the name of "scuffing" or "corrosion", including any degradation of the elements engraved on the surface of the containers in particular of a bottle, such as marks obtained by pyrography. However, in practice, when using an additive aimed at increasing detergency, unfortunately, an increase in corrosion (scuffing) is also often observed.

[0011] In addition, the height of foam formed during the cleaning cycles must be able to be controlled.

[0012] Finally, an effective detergent composition must prevent the formation of mineral deposits, in particular calcium carbonate deposits, generally called "scale".

[0013] Detergent compositions are currently available on the market. While these detergent compositions separately meet some of the technical criteria mentioned above, none of them meets them all at the same time. Consequently, the present invention aims to provide such a composition which meets the aforementioned needs, which can optionally comprise elements derived from renewable biological materials and which can reduce its environmental impact, in particular by using less caustic soda in obtaining of an effective detergent composition.

[0014] WO 2013/053390 A1 describes a detergent composition comprising a surfactant and lysine tetramethylene phosphonate. It does not describe a composition comprising a gluconic acid.

[0015] WO 2012/028203 A1 describes a detergent composition comprising phosphonocarboxylic acid, gluconic acid and mixtures thereof. It does not describe a composition comprising lysine tetramethylene phosphonate.

DE 13 02 882 B describes a method for washing bottles comprising a bath comprising a chelating agent such as gluconic acid and / or aminoalkyldiphosphonic acid. It does not describe a composition comprising lysine tetramethylene phosphonate.

DE 43 38 626 A1 describes a washing additive for the addition to the bath for cleaning glass bottles comprising an acid such as gluconic acid and a diphosphonic acid. It does not describe a composition comprising lysine tetramethylene phosphonate.

Summary of the Invention [0018] The present invention relates to a washing additive comprising (or consisting of) a lysine tetramethylene phosphonate (abbreviation: LTMP) and a carboxylic acid consisting of / corresponding to gluconic acid.

[0019] The present invention also relates to a washing additive consisting of lysine tetramethylene phosphonate (abbreviation: LTMP) and a carboxylic acid corresponding to gluconic acid.

Preferably, in the washing additive according to the invention, the lysine tetramethylene phosphonate and the gluconic acid are present in a weight ratio of lysine tetramethylene phosphonate: gluconic acid of between (approximately) 1: 1 and (approximately ) 5: 1.

Preferably the weight ratio between lysine tetramethylene phosphonate and gluconic acid is between (approximately) 1.5: 1 and (approximately) 3: 1 [0022] Preferably, according to the present invention, lysine tetramethylene phosphonate is present (in the additive) at a concentration between (approximately) 2% and (approximately) 50% by weight, preferably between (approximately) 2% and (approximately) 30% by weight, preferably between ( approximately) 2% and (approximately) 10% by weight.

Advantageously, the additive according to the invention further comprises a dispersing agent, preferably a natural dispersing agent (that is to say a dispersing agent obtained from renewable biological materials).

[0024] Preferably, said dispersing agent is a polycarboxylic dispersing agent.

[0025] Preferably, the dispersing agent is selected from the group consisting of carboxymethyl cellulose, carboxymethyl inulin, inulin, polyaspartic acid, polyepoxy succinic acid, and mixtures thereof.

Advantageously, the dispersing agent is present in the additive according to the invention in a weight ratio of lysine tetramethylene phosphonate: dispersing agent of between (approximately) 10: 1 and (approximately) 3: 1.

[0027] Preferably, the dispersing agent is present in the additive at a concentration of between (approximately) 0.5 and (approximately) 10% by weight.

[0028] Particularly advantageously, the dispersing agent is carboxymethyl inulin.

[0029] Preferably, the wash additive according to the present invention further comprises a low foaming surfactant, but capable of facilitating the penetration and solubilization of the wash additive of the invention.

[0030] Preferably, said surfactant is chosen from the group consisting of copolymers of ethyl propylene oxides, ethoxylated fatty acids and mixtures thereof.

Preferably, said surfactant is present in a lysine tetramethylene phosphonate: surfactant ratio of between (approximately) 5: 1 and (approximately) 1: 2.

[0032] Preferably, said surfactant is present in the additive at a concentration of between (approximately) 0.5% and (approximately) 20% by weight.

[0033] According to a preferred form of the invention, the washing additive consists of lysine tetramethylene phosphonate, gluconic acid and a low foaming surfactant, in which the tetramethylene phosphonate: gluconic acid weight ratio is included between (approximately) 1.5: 1 and (approximately) 3: 1, and the concentration of low foaming surfactant is between (approximately) 0.5% and (approximately) 20%.

[0034] The present invention also relates to a detergent composition comprising the washing additive of the invention and caustic soda (or other suitable solvent), said caustic soda (or other suitable solvent) being present at a concentration of between (approximately) 0.5% and (approximately) 3%, preferably between (approximately) 0.5% and (approximately) 1.5%.

Preferably, said detergent composition is such that the washing additive is present at a concentration between (approximately) 0.05% and (approximately) 0.5%, and preferably between (approximately) 0.1% and (approximately) 0.2 %.

Another object of the invention relates to an industrial method of cleaning containers soiled by mold, preferably glass containers, and even more preferably glass bottles, comprising the step of washing said containers with a washing additive or a detergent composition of the invention.

Preferably, in said industrial process of the invention, the washing is carried out by immersion in a bath containing the detergent composition of the invention at a temperature between (approximately) 60 ° C and (approximately) 80 ° C , preferably between (approximately) 60 ° C and (approximately) 70 ° C, and / or by spraying said detergent composition.

The present invention also relates to the use of the washing additive and / or of the detergent composition, and / or of the process of the invention in the food industry, preferably in the industry. beverages, and even more preferably in the brewing industry.

Another object of the invention relates to the use of lysine tetramethylene phosphonate and at least gluconic acid, preferably applied simultaneously in a washing additive, to remove mold from the surface of containers , preferably glass bottles.

The invention also relates to the use of lysine tetramethylene phosphonate and at least gluconic acid, preferably applied simultaneously, as a washing solution without "scuffing", without corrosion of the surface of containers, preferably glass bottles.

Definitions:

In the present description, the terms used and not defined below are those having the same meaning and usually understood by the person skilled in the art.

Lysine tetramethylene phosphonate or LTMP is a molecule corresponding to chemical formula 1 as shown in Figure 1 and belongs to the family of phosphonic acids, the salts of which are called phosphonates, generally known to be chelating agents, again called “sequestering agents” or “sequestering agents”, that is to say that they are molecules, and more precisely surfactants (see below) capable of acting as ligands by forming chemical complexes with metal ions such as as copper, iron, nickel, of which they thus limit the availability.

Lysine tetramethylene phosphonate is derived from lysine, a natural amino acid whose chemical formula is also shown in Figure 1 (chemical formula 2).

[0044] In the present description, the word “surfactant” or surfactant refers to a natural or synthetic molecule capable of modifying the surface tension between two surfaces. From a chemical point of view, a surfactant is an amphiphilic molecule having a hydrophobic and nonpolar part and a hydrophilic and polar part. This dual property gives it a particular affinity for oil / water or water / oil interfaces and is the basis for the stabilization of dispersed systems.

[0045] The surfactants can be ionic or nonionic. When they are ionic, depending on the nature of the charge on the hydrophilic part, the surfactants can be anionic, cationic, or zwitterionic or amphoteric when the hydrophilic part has a positive charge and a negative charge which, from an electrical point of view , compensate each other.

In the present description, the term "surfactant" is a term equivalent to the term "surfactant".

In the present description, the terms “detergent”, “foaming agent”, “low or no foaming agent”, “low foaming agents”, “dispersing agent” all relate to surfactants; these terms are descriptive terms of the function provided by the surfactant in the composition.

Thus, a "detergent" more specifically designates a surfactant capable of removing soiling of organic and / or mineral origin including deposits of bacteria or from bacteria or other microorganisms (molds, fungi, yeasts, or even animals (such as molluscs)) on a surface of a solid by dissolving said soils.

A "foaming agent" is a surfactant capable of being adsorbed at the gas / liquid interface, in particular at the water / air interface and of leading to the formation of foam by dispersion of a large volume of gas. (especially air) in a small volume of liquid (especially water). Depending on its propensity to form foam, we will speak of an agent with more or less foaming power. It is known to those skilled in the art that the foaming power can be measured according to the so-called Ross-Miles method which makes it possible to evaluate an initial foam volume and its stability over time. This method is based on static measurement and is commonly used in industry. However, other measurement methods exist based in particular on dynamic principles.

Surfactants or nonionic surfactants in particular alkoxylated surfactants such as EO / PO copolymers, alcohol alkoxylates in particular EO / PO block copolymers such as Pluronic surfactants, dehypon LS-54 (R- (EO) ₅ (PO) ₄ ), Dehypon LS-36 (R- (EO) ₃ (PO) ₆ ), Plurafac LF 221 (BASF), Tegoten EC11, LUTENOL (alcohol ethoxylates) or a mixture of between them.

Low foaming surfactants preferably comprise low foaming nonionic polymers, used for the purpose of increasing detergency while limiting the generation of foam. By way of example, we can mention: Plurafac S 305 LF, Plurafac S 405 LF, Plurafac S 505 LF, Plurafac SLF 18B, Plurafac LF 303, Plurafac LF-305, Plurafac LF-4030 or the Plurafac SLF-18B45 (BASF) or a mixture of them.

Non-foaming surfactants or also called "defoamer" are characterized by lower aqueous solubilities linked to a lower proportion of hydrophilic element and their primary function is to destabilize the structure of the foam. The preferred surfactants are: Pluriol 1000, 2000 or 4000, as well as Pluronic L101; L61 or L81.

A "dispersing agent" or "dispersant" is a surfactant capable of fixing hydrophobic particles contained in a hydrophilic solution by preventing their aggregation and by promoting their dispersion in said solution.

The terms percentage (%) by weight refer to the concentration of an ingredient of a composition described, by the weight of this ingredient divided by the total by weight of the composition and multiplied by 100. the terms "approximately ”Refer to variations in numerical quantities which may exist in the applications of the claimed products and may vary depending on the purity or the source of obtaining the products, as well as the method of application of the claimed products. Preferably, these variations are of the order of 10% or 5%. The present invention will be described in detail in the following examples with reference to the appended figures and presented by way of non-limiting illustrations of the various aspects of the present invention.

The term "scuffing" or "corrosion" refers to any degradation of the glass at the level of containers, in particular of bottles, including any degradation of the elements engraved on the surface of said containers, such as marks or designs obtained by pyrography.

Brief Description of the Figures and Tables [0056] Figure 1 shows the chemical formula of lysine tetra (methylene) phosphonate as used in the present invention (chemical formula 1), as well as that of lysine (chemical formula 2) of which it drifts.

[0057] FIG. 2 shows the results of tests for cleaning dirt present on glass plates which have been washed with different compositions, and in particular a detergent composition according to the invention.

[0058] FIG. 3 shows the results of "scuffing" tests carried out on glass bottles treated with different detergent compositions, and in particular detergent compositions according to the invention.

FIG. 4 shows the results of three series of measurement tests (tests nos ^. 1 to 3) of the detergency performance of different detergent compositions, and in particular of detergent compositions according to the invention, as obtained on glass bottles treated with said compositions.

Detailed description of the invention [0060] The washing additive according to the present invention offers the advantage of satisfying all of the technical criteria mentioned above. It is particularly well suited for the automatic cleaning of reusable glass bottles, although other applications may also be considered.

[0061] In addition, the additive according to the present invention offers the advantage of using less caustic soda. However, caustic soda is known to increase the pH of watercourses (rivers, rivers), thus representing a potential threat to aquatic fauna and flora. Caustic soda can also infiltrate the earth, and thus harm agriculture as well as the environment of plants, minerals and animals directly close or further away, or even contaminate groundwater.

The composition according to the present invention has the additional advantage of being able to be used in the cleaning phase over a lower temperature range compared to the compositions available on the market. In other words, the washing additive according to the invention allows less energy-consuming and less polluting cleaning.

Especially since the additive according to the present invention comprises a compound, LTMP, which is advantageously obtained from renewable biological materials, that is to say which derive from natural molecules, which makes it an additive a priori more ecological than many other additives available on the market.

Example 1: Bottle Detergency Tests [0064] Comparative tests were carried out by immersing glass bottles previously soiled with mold (fungi / yeasts). A label is stuck on the outside of the bottles. The bottles are then immersed in baths comprising different detergent compositions containing different washing additives and 1% caustic soda at a temperature of 70 ° C. The effectiveness of the different washing additives is evaluated both in terms of cleaning - visual evaluation - and in terms of the label peel time.

The results obtained for a detergent composition according to the invention and for two additives A and B corresponding to two different commercial formulas are presented in Table 1 below:

Table 1

Sample Cleaning results Label peel time 1 +++ - 1'12 (before) 1.34 (back) 2 +++ - 1 ’23 (before) 2'25 (rear) 3 ++++ 1'15 (before) 1 ’26 (back)

In Table 1, the products tested are as follows: Sample: soiled glass bottles subjected to immersion at 70 ° C in a detergent composition comprising 1% NaOH and 0.2% of a first additive (which we will call additive A) commercially available.

[0067] Sample 2: soiled glass bottles subjected to immersion at 70 ° C in a detergent composition comprising 1% NaOH and 0.2% of a second additive (which we will call additive B) available commercially.

[0068] Sample 3: soiled glass bottles subjected to immersion at 70 ° C in a detergent composition according to the invention comprising 1% NaOH and 0.2% of an additive according to the invention.

The composition of the additive for sample 3 is as follows:

38g city water

9g gluconic acid 60%

27g cumene sulfonate

10g low foaming surfactant (Fatty alcohol alkoxylates, Plurafac LF303 © BASF)

2g carboxymethylinulin

14g LTMP

Example 2 Detergency Test on Plates [0070] Comparative tests on standardized soil plates consisting of starch applied to glass were carried out. For this, the dirt plates were immersed at 70 ° C or 80 ° C in a bath comprising a detergent composition for a determined time and with stirring. Said detergent composition comprised 1 to 2% caustic soda and either the washing additive according to the invention (sample 3) or a commercially available washing additive (samples 1 and 2). The reading of the plates thus treated is visual.

The results obtained are presented in FIG. 2 and show the particularly advantageous performances in terms of detergency of the detergent composition according to the invention.

Example 3: “Scuffing” Test This test consists in immersing at 70 ° C a clean and dry glass bottle, weighed beforehand, for seven hours in a detergent composition comprising 1% by weight of caustic soda and 0.2% d 'a washing additive. After which the bottle is dried and weighed again. The difference in weight corresponds to the dissolution of the glass in the solution commonly known as “chemical scuffing” or chemical corrosion. In order to better simulate real bottle cleaning conditions, 50 ppm of calcium phosphate was added to the solutions. The difference in weight is expressed in grams, a significant loss being synonymous with a high "scuffing".

Three samples, numbered from 1 to 3, were tested and the results are presented in FIG. 3.

[0074] Sample 1 corresponds to a sample subjected to the same detergent composition with the same commercial washing additive as Sample 1 in Example 1.

[0075] Sample 2 corresponds to a sample subjected to a detergent composition using a commercial washing additive known for its "anti-scuffing" properties.

[0076] Sample 3 corresponds to a sample subjected to the same detergent composition with the same washing additive according to the invention as sample 3 in Example 1.

It is clear from Figure 3 that the sample subjected to a detergent composition according to the invention comprising a washing additive according to the invention (sample 3) exhibits particularly low levels of "scuffing", comparable to those obtained with the washing additive known for its “antiscuffing” properties.

Example 4: Other tests [0078] The washing additives according to the invention, and therefore the detergent compositions according to the invention derived therefrom, have experimentally shown sufficient antifoaming behavior for the targeted application. These additives according to the invention have been shown to be not very aggressive towards the labels, limiting the ink losses polluting the washing baths, but also limiting the degradation of the paper.

The detergency tests carried out in the laboratory were confirmed by tests in industrial bottle washers.

Example 5 Nature of the Phosphonate and of the Carboxylic Acid Three series of tests were carried out on different washing additives in order to compare the effect of the nature of the phosphonate and the nature of the carboxylic acid on its performance. in terms of detergency and its corrosive power (scuffing) and the results obtained are presented in figure 4 and summarized in table 2.

Example 5 Nature of the Phosphonate and of the Carboxylic Acid Three series of tests were carried out on different washing additives in order to compare the effect of the nature of the phosphonate and of the nature of the carboxylic acid used in the treatment. detergent composition on its performance in terms of detergency. The results obtained are presented in Figure 4 and summarized in Table 2. Likewise, the effect of the nature of the phosphonate and that of the carboxylic acid on the corrosion (scuffing) powers of the detergent composition were tested and the results are also presented there.

Principle of the different tests:

In a first series of tests, series of tests no.1 (% performance 1), the performance in terms of detergency of the washing composition (detergent composition) corresponds to the percentage of perfectly clean bottles after washing in the laboratory . For this, dirty bottles were immersed for 10 minutes in a bath at 80 ° C comprising a detergent composition comprising 2% by weight of NaOH and 0.2% by weight of the washing additive tested. The bottles were then rinsed with tap water and filled with a methylene blue solution. The bottles were rinsed again and analyzed optically.

In a second series of tests, series of tests no.2 (% performance 2), the detergency performance corresponds to the percentage of perfectly clean plates after washing in the laboratory. For this, plates soiled with rice starch (supplied by the CFT bv materials test center) were immersed with stirring for 10 minutes in a bath at 80 ° C comprising a detergent composition comprising 2% by weight of NaOH and 0.2% by weight of the washing additive tested. The plates were then rinsed with tap water and analyzed optically. The percentage of clean plates corresponds to the ratio between the surface of perfectly clean plates and the total surface of the plates.

In the third series of tests, series of tests no.3 (% performance 3), the detergency performance corresponds to the percentage of perfectly clean bottles after washing in industrial washers. For this, dirty bottles were immersed for 10 minutes in a bath at 80 ° C comprising a detergent composition comprising 2% by weight of NaOH and 0.2% by weight of the washing additive tested. The bottles were then rinsed with water and filled with a methylene blue solution, then optically analyzed.

At the same time, the various washing additives (additives 1 to 11) were also tested in the laboratory for their anti-scuffing property. For this we evaluated the weight loss of bottles previously immersed for 7 hours at 80 ° C in a bath comprising a detergent composition comprising 2% by weight of NaOH and 0.2% by weight of the tested washing additive. The result is expressed on a scale from 0 to 10, the value 0 corresponding to the result obtained with a standard anti-scuffing additive based on phosphonate, and the value 10 corresponding to the result obtained with an additive based on EDTA which does not has no anti-scuffing properties.

Description of the tested products

Additive Composition 1 LTMP + phosphoric acid 2 LTMP + gluconic acid (invention) 3 HEDP + phosphoric acid 4 HEDP + gluconic acid 5 LTMP + phosphoric acid + surfactant 6 LTMP + gluconic acid + surfactant 7 HEDP + phosphoric acid + surfactant 8 HEDP + gluconic acid + surfactant 9 Commercial standard using a phosphonate with low corrosion capacity 10 Commercial standard with high detergent power using phosphoric acid 11 Commercial standard with high detergent power using EDTA

Details of the compositions of the different additives tested:

Additive 1: 40% LTMP lysine tetramethylene phosphonate (SPE 1001 ©: Italmach), 15% 5 phosphoric acid acid (75% wt)

Additive 2: 40% LTMP lysine tetramethylene phosphonate (SPE 1001 ©: Italmach), 15% gluconic acid (60% wt)

Additive 3: 40% 1-Hydroxyethylidène -1,1, -diphosphonic acid (HEDP, Dequest 2010 ©: Italmach), 15% phosphoric acid (75% wt)

Additive 4: 40% 1-Hydroxyethylidene -1,1 acid, -diphosphonic acid (HEDP, Dequest 2010 ©: Italmach), 15% gluconic acid (60% wt)

Additive 5: 12% LTMP lysine tetramethylene phosphonate (SPE 1001 ©: Italmach) 10% phosphoric acid (50% wt), 10% low foaming surfactant (Fatty alcohol alkoxylates,

Plurafac LF303 © BASF), 2% dispersing agent (carboxymethyl inulin, CMI, Dequest 15 PB ©: Italmach)

Additive 6: 12% LTMP lysine tetramethylene phosphonate (SPE 1001 ©: Italmach) 10% gluconic acid (60% wt), 10% low foaming surfactant (Fatty alcohol alkoxylates, Plurafac LF303 © BASF), 2% dispersing agent (carboxymethyl inulin, CMI, Dequest PB ©: Italmach)

Additive 7: 12% 1-Hydroxyethylidène -1,1, -diphosphonic acid (HEDP, Dequest 2010 ©: Italmach), 10% phosphoric acid (75% wt), 10% low foaming surfactant (Fatty alcohol alkoxylates, Plurafac LF303 © BASF ), 2% dispersing agent (carboxymethyl inulin, CMI, Dequest PB ©: Italmach)

Additive 8: 12% 1-Hydroxyethylidène -1,1, -diphosphonic acid (HEDP, Dequest 2010 ©: Italmach), 10% gluconic acid (60% wt), 10% low foaming surfactant (Fatty alcohol alkoxylates, Plurafac LF303 © BASF ), 2% dispersing agent (carboxymethyl inulin, CMI, Dequest PB ©: Italmach)

Additive 9: mixture of phosphonates (known for their "antiscuffing" performance), dispersing agent and low foaming surfactant. It is a standard commercial additive for washing bottles based on phosphonates and low scuffing (corrosion) power known as Mix100BNA ©: Sopura

Additive 10: phosphoric acid, phosphonic acid and low foaming surfactant (Fatty alcohol alkoxylates). It is a standard commercial additive for washing 15 bottles of phosphoric acid with high detergency power, known as MIX100BPRD43 ©: Sopura

Additive 11: ethylenediaminetetraacetic acid (EDTA) and low foaming surfactant. It is a standard commercial additive for washing bottles based on EDTA with high detergency power, known as MIX LEG ©: Sopura

Results of the different tests:

Table 2

Additive Stability Detergency performance test no. 1 Detergency performance test no. 2 Detergency performance test no. 3 Corrosion power (scuffing) 1 Stable 80 60 ND 3 2 Stable 90 100 90 8 3 Stable 60 ND ND 2 4 Stable 50 ND ND 6 5 Unstable Unstable Unstable Unstable Unstable 6 Stable 80 70 80 8 7 Stable 50 ND ND 2 8 Stable 30 ND ND 6 9 Stable 10 ND 20 10 10 Stable 70 80 80 2 11 Stable 90 60 100 0

The results presented above show that only the combination of LTMP as phosphonate and gluconic acid as carboxylic acid makes it possible to obtain a detergent composition exhibiting both high detergent power and good anti-corrosion properties. ("Anti-scuffing").

Claims (21)

1. A wash additive comprising lysine tetramethylene phosphonate (LTMP) and gluconic acid. 2. The additive according to claim 1, characterized in that the lysine tetramethylene phosphonate and gluconic acid are present in a lysine tetramethylene phosphonate: gluconic acid ratio by weight of between 1: 1 and 5: 1, preferably between 1. , 5: 1 and 3: 1. 3. The additive according to claim 1 or 2, characterized in that the lysine tetramethylene phosphonate is present in the additive at a concentration of between 2% and 50% by weight, preferably between 2% and 30%, preferably between 2% and 10% by weight. 4. The additive according to one of the preceding claims, characterized in that it comprises a dispersing agent, preferably a natural dispersing agent. 5. The additive according to claim 4, characterized in that the dispersing agent is a polycarboxylic dispersing agent. 6. The additive according to claim 5, characterized in that the dispersing agent is chosen from the group consisting of carboxymethyl cellulose, carboxymethyl inulin, inulin, polyaspartic acid, polyepoxy succinic acid, and mixtures of these. 7. The additive according to any one of claims 4 to 6, characterized in that the dispersing agent is present in a weight ratio of lysine tetramethylene phosphonate: dispersing agent of between 10: 1 and 3: 1. 8. The additive according to one of claims 4 to 6, characterized in that the dispersing agent is present in the additive at a concentration of between 0.5 and 10% by weight. 9. The additive according to one of claims 4 to 8, characterized in that the dispersing agent is carboxymethyl-inulin. 10. The additive according to one of the preceding claims, characterized in that it comprises a low foaming surfactant. 11. The additive according to claim 10, characterized in that the surfactant is selected from the group consisting of copolymers of ethyl propylene oxides, ethoxylated fatty acids and mixtures thereof. 12. The additive according to claim 10 or 11, characterized in that the surfactant is present in a lysine tetramethylene phosphonate: surfactant ratio of between 5: 1 and 1: 2. 13. The additive according to claim 12, characterized in that the surfactant is present in the additive at a concentration of between 0.5% and 20% by weight. 14. A washing additive consisting of lysine tetramethylene phosphonate, gluconic acid and a low foaming surfactant, wherein the tetramethylene phosphonate: gluconic acid weight ratio is between 1.5: 1 and 3: 1, and the concentration of low foaming surfactant is between 0.5% and 20%. 15. A detergent composition comprising a washing additive according to any one of the preceding claims and caustic soda, the caustic soda being present at a concentration of between 0.5% and 3%, preferably between 0.5% and 1.5%. 16. The detergent composition according to claim 15, characterized in that the washing additive is present at a concentration of between 0.05% and 0.5%, and preferably between 0.1% and 0.2%. 17. An industrial method of cleaning containers soiled by mold, preferably glass containers, and even more preferably glass bottles, comprising the step of washing said containers with a washing additive according to one of the following. claims 1 to 14 or a detergent composition according to claim 15 or 16. 18. The industrial process according to claim 17, characterized in that the washing is carried out by immersion in a bath containing the detergent composition according to claim 15 or 16 at a temperature between 60 ° C and 80 ° C, preferably between 60 ° C and 70 ° C, and / or by spraying said detergent composition. 19. Use of the washing additive according to one of claims 1 to 15 and / or of the detergent composition according to claim 15 or 16, and / or of the process according to claim 17 or 18 in the food industry. , preferably in the beverage industry, and even more preferably in the brewing industry. 20. Use of lysine tetramethylene phosphonate and gluconic acid to remove mold from the surface of containers, preferably glass bottles. 21. Use of lysine tetramethylene phosphonate and gluconic acid as a wash solution without scuffing.