EP2576753A1

EP2576753A1 - Machine dishwasher detergent

Info

Publication number: EP2576753A1
Application number: EP11723306.4A
Authority: EP
Inventors: Thomas Eiting; Dorota SENDOR-MÜLLER; Johannes Zipfel; Arnd Kessler; Thorsten Bastigkeit; Christian Nitsch; Sven Müller
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2010-05-27
Filing date: 2011-05-05
Publication date: 2013-04-10
Anticipated expiration: 2031-05-05
Also published as: ES2640989T3; WO2011147665A1; US20130079268A1; US9719055B2; DE102010029348A1; HUE036668T2; EP2576753B1; PL2576753T3

Abstract

Liquid cleaning compositions comprising: a) 20 to 70% by weight of water; b) at least one amylase formulation; c) at least one Ca²⁺ ion source; d) lactic acid or a lactic salt; are notable for increased amylase stability and improved cleaning performance.

Description

"Machine dishwashing detergent"

The present application is directed to liquid cleaners, especially liquid automatic dishwashing detergents containing amylase preparations which are stabilized by calcium lactate.

The use of enzymes to increase the washing and cleaning performance of detergents and cleaners has been established in the art for decades. In particular, hydrolytic enzymes such as proteases, amylases or lipases are part of numerous textile or dishwashing detergents because of their direct cleaning action.

Proteases, in particular serine proteases, to which the subtilases according to the invention are also calculated, are used for degrading proteinaceous soils on the items to be cleaned. Among the detergent and detergent proteases, subtilases occupy an outstanding position due to their favorable enzymatic properties such as stability or pH optimum. From the enzyme class of amylases in particular the α-amylases are widely used. A-amylases (E.C. 3.2.1.1) hydrolyze internal α-1,4-glycosidic bonds of starch and starch-like polymers.

The decisive for the end user cleaning effect of the enzymes used in detergents and cleaning agents is determined in addition to the enzyme structure to a considerable extent by the nature of the preparation of these enzymes and their stabilization against environmental influences.

Detergents and cleaning enzymes are formulated in both solid and liquid form. The group of solid enzyme preparations includes, in particular, the enzyme granules consisting of several ingredients, which in turn are preferably incorporated into solid detergents and cleaners. In contrast, liquid or gel detergents and cleaners often contain liquid enzyme preparations, which, unlike the enzyme granules, are much less protected against external influences.

To increase the stability of such enzyme-containing liquid detergents or cleaners, a number of different protective measures have been proposed. For example, German patent application DE 2 038 103 (Henkel) teaches the stabilization of enzyme-containing dishwashing detergents by saccharides, while in European patent EP 646 170 B1 (Procter & Gamble) propylene glycol is disclosed for enzyme stabilization in liquid detergents. As reversible protease inhibitors in the prior art polyols, especially glycerol and 1, 2-propylene glycol are described. A corresponding technical disclosure can be found, for example, in international application WO 02/08398 A2 (Genencor).

The stabilization of enzymes in aqueous cleaning agents by means of calcium formate, calcium acetate or calcium propionate is described in US Pat. No. 4,318,818 (Procter & Gamble).

The use of lactic acid salts for enzyme stabilization is described in the US patent application US 2002/128588 (Dow Chemical).

A second group of known stabilizers form borax, boric acids, boronic acids or their salts or esters. These include, in particular, derivatives with aromatic groups, for example ortho, meta or para-substituted phenylboronic acids, in particular 4-formylphenylboronic acid (4-FPBA) or the salts or esters of the compounds mentioned. The latter compounds as enzyme stabilizers are disclosed, for example, in international patent application WO 96/41859 A1 (Novo Nordisk). However, boric acids and boric acid derivatives, for example, often have the disadvantage that they form unwanted by-products with other ingredients of a composition, in particular detergent ingredients, so that they are no longer available for the desired cleaning purpose or even as an impurity in the compositions concerned stay behind on the laundry. Furthermore, boric acids or borates are considered to be disadvantageous from an environmental point of view.

Depending on the chemical nature of the stabilizers, the methods for the stabilization of enzymes which have hitherto been found and described in the prior art can not be used in every detergent formulation and can not always be sufficiently adequate with regard to their stabilizing effect. The object of the present application was therefore to provide an improved stabilizing agent for enzymes and an enzyme-containing cleaning agent with increased enzyme stability. It has been found that liquid, aqueous amylase preparations can be surprisingly stabilized by the addition of calcium lactate.

A first subject of this application is a liquid detergent containing

a) 20 to 70 wt .-% water

b) at least one amylase preparation

c) at least one Ca ²⁺ ion source

d) lactic acid or a lactic acid salt

The washing or cleaning agent preparations according to the invention contain as their first essential constituent at least one amylase preparation. Examples of amylases which can be used according to the invention are the α-amylases from Bacillus lichenifor- mis, B. amyloliquefaciens, B. stearothermophilus, Aspergillus niger and A. oryzae and the further developments of the abovementioned amylases which are improved for use in detergents and cleaners. Furthermore, for this purpose, the α-amylase from Bacillus sp. A 7-7 (DSM 12368) and cyclodextrin glucanotransferase (CGTase) from B. agaradherens

(DSM 9948).

Liquid detergents preferred according to the invention contain, based on their total weight, between 0.001 and 5.0% by weight, preferably between 0.01 and 4.0% by weight and in particular between 0.05 and 3.0% by weight of amylase preparations. Particular preference is given to detergents which, based on their total weight, contain between 0.075 and 2.0% by weight of amylase preparations.

In addition to the amylase, the liquid detergents according to the invention may contain further washing- or cleaning-active enzyme. The proportion by weight of all washing or cleaning-active enzyme preparations in the total weight of the cleaning agent is preferably between 1, 0 and 15 wt .-%, preferably between 1, 5 and 12 wt .-%, particularly preferably between 2.0 and 10 wt .-% and in particular between 2.5 and 8 wt .-%.

The enzymes used with particular preference include in particular proteases. Among the proteases, those of the subtilisin type are preferable. Examples of these are the subtilisins BPN 'and Carlsberg and their further developed forms, the protease PB92, the subtilisins 147 and 309, the alkaline protease from Bacillus lentus, subtilisin DY and the enzymes thermitase which can no longer be assigned to the subtilisins in the narrower sense, Proteinase K and the proteases TW3 and TW7.

Liquid detergents preferred according to the invention contain, based on their total weight, between 0.002 and 7.0% by weight, preferably between 0.02 and 6.0% by weight and in particular between 0.1 and 5.0% by weight of protease preparations. Particular preference is given to detergents which, based on their total weight, contain between 0.2 and 4.0% by weight of protease preparations.

Washing or cleaning-active amylases and proteases are generally not provided in the form of the pure protein but rather in the form of stabilized, storable and transportable preparations. Such prefabricated preparations include, for example, the solid preparations obtained by granulation, extrusion or lyophilization or, especially in the case of liquid or gel-form detergents, solutions of the enzymes, advantageously as concentrated as possible, low in water and / or added with stabilizers or further auxiliaries. Alternatively, the enzymes may be encapsulated for both the solid and liquid dosage forms, for example by spray-drying or extruding the enzyme solution together with a preferably natural polymer or in the form of capsules, for example those in which the enzymes are entrapped as in a solidified gel or in those of the core-shell type in which an enzyme-containing core is coated with a water, air and / or chemical impermeable protective layer. In deposited layers, further active ingredients, for example stabilizers, emulsifiers, pigments, bleaches or dyes, may additionally be applied. Such capsules are applied by methods known per se, for example by shaking or rolling granulation or in fluid-bed processes. Advantageously, such granules, for example by applying polymeric film-forming agent, low in dust and storage stable due to the coating.

Furthermore, it is possible to assemble two or more enzymes together so that a single granule has several enzyme activities.

As can be seen from the previous statements, the enzyme protein forms only a fraction of the total weight of conventional enzyme preparations. Protease and amylase preparations preferably used according to the invention contain between 0.1 and 40% by weight, preferably between 0.2 and 30% by weight, more preferably between 0.4 and 20% by weight and in particular between 0.8 and 10% by weight of the enzyme protein.

Also usable according to the invention are lipases or cutinases, in particular because of their triglyceride-splitting activities, but also in order to generate in situ peracids from suitable precursors. These include, for example, the lipases originally obtainable from Humicola lanuginosa (Thermomyces lanuginosus) or further developed, in particular those with the amino acid exchange D96L. Furthermore, for example, the cutinases can be used, which were originally isolated from Fusarium solani pisi and Humicola insolens. It is also possible to use lipases, or cutinases, whose initial enzymes were originally isolated from Pseudomonas mendocina and Fusarium solanii.

The agents according to the invention may contain cellulases.

Furthermore, enzymes can be used, which are summarized by the term hemicellulases. These include, for example, mannanases, xanthan lyases, pectin lyases

(= Pectinases), pectin esterases, pectate lyases, xyloglucanases (= xylanases), pullulanases and ß-glucanases. Oxidoreductases, for example oxidases, oxygenases, catalases, peroxidases, such as halo, chloro, bromo, lignin, glucose or manganese peroxidases, dioxygenases or laccases (phenol oxidases, polyphenol oxidases) can be used according to the invention to increase the bleaching effect. Advantageously, it is additionally preferred to add organic, particularly preferably aromatic, compounds which interact with the enzymes in order to enhance the activity of the relevant oxidoreductases (enhancers) or to ensure the flow of electrons (mediators) at greatly varying redox potentials between the oxidizing enzymes and the soils.

Preference is given to using a plurality of enzymes and / or enzyme preparations, preferably liquid protease preparations and / or amylase preparations.

A second essential ingredient of the inventive detergents is the Ca ²⁺ ion source. As particularly preferred and with respect to the stabilization of the cleaning agents particularly effective Ca ion sources, the organic calcium salts have been found. The proportion by weight of the organic calcium salts in the total weight of the detergents according to the invention can vary within wide limits, however, such detergents have proven to be particularly stable, which, based on their total weight 0.01 to 5.0 wt .-%, preferably 0.02 to 3 , 0 wt%, more preferably 0.05 to 2.0 wt .-% and in particular 0.01 to 1, 0 wt .-% Ca ²⁺ ions of calcium salts.

Another essential constituent of inventive cleaning agents is the lactic acid or a lactic acid salt. Preferred lactic acid salts are the salts of the alkali and alkaline earth metals. The proportion by weight of the lactic acid or the lactic acid salt in the total weight of the cleaning agent is preferably 0.05 to 10 wt .-%, preferably 0, 1 to 8.0 wt .-%, particularly preferably 0.2 to 5.0 wt .-% and in particular 0.25 to 2.5 wt .-%.

It is particularly preferred to use calcium lactate as a common source of Ca ²⁺ ions and lactic acid. Liquid cleaning agent, characterized in that the liquid cleaning agent contains calcium lactate, wherein the proportion by weight of the calcium lactate in the total weight of the cleaning agent preferably 0.05 to 10 wt .-%, preferably 0.1 to 8.0 wt .-%, particularly preferably 0, 2 to 5.0 wt .-% and in particular 0.25 to 2.5 wt .-%, are therefore preferred according to the invention.

A preferred subject of this application is a liquid detergent containing

a) 20 to 70 wt .-% water

b) at least one amylase preparation

c) calcium lactate The composition of some further preferred cleaning agents according to the invention can be taken from the following tables (in% by weight):

Table 1

Table 2

As a preferred component with regard to the stability of the enzyme preparations, the inventive cleaning agents contain an organic solvent. Preferred organic solvents are derived from the group of monohydric or polyhydric alcohols, alkanolamines or glycol ethers. The solvents are preferably selected from ethanol, n- or i-propanol, butanol, glycol, propane- or butanediol, glycerol, diglycol, propyl- or butyldiglycol, hexylene glycol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, etheylene glycol monomethyl n-butyl ether, diethylene glycol methyl ether , Di-ethylene glycol ethyl ether, propylene glycol methyl, ethyl or propyl ether, dipropylene glycol methyl or ethyl ether, methoxy, ethoxy or butoxytriglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol t-butyl ether and mixtures of these solvents. The proportion by weight of these organic solvents in the total weight of cleaning agents according to the invention is preferably from 0.1 to 10% by weight, preferably from 0.2 to 8.0% by weight and in particular from 0.5 to 5.0% by weight.

A particularly preferred organic solvent which is particularly effective in stabilizing the detergents is glycerin and 1,2-propylene glycol.

Liquid cleaning compositions which comprise at least one polyol, preferably from the group consisting of glycerol and 1,2-propylene glycol, the proportion by weight of the polyol of the total weight of the cleaning agent being is preferably 0, 1 and 10 wt .-%, preferably 0.2 and 8.0 wt .-% and in particular 0.5 and 5.0 wt .-%, are inventively preferred.

A second preferred constituent of the cleaning agents according to the invention is a sugar alcohol (alditol). The group of alditols includes noncyclic polyols of the formula

HIGH ₂ [CH (OH)] _n CH ₂ OH. The alditols include, for example, mannitol (mannitol), isomalt, lactitol, sorbitol (sorbitol) and xylitol (xylitol), threitol, erythritol and arabitol. As particularly advantageous in terms of enzyme stability, the sorbitol has been found. The proportion by weight of the sugar alcohol in the total weight of the automatic dishwashing agent is preferably from 1, 0 to 10 wt .-%, preferably 2.0 to 8.0 wt .-% and in particular 3.0 to 6.0 wt .-%.

Liquid detergent containing at least one alditol, preferably sorbitol, wherein the weight fraction of the alditol on the total weight of the detergent preferably 1, 0 to 10 wt .-%, preferably 2.0 to 8.0 wt .-% and in particular 3.0 to 6 , 0 wt .-%, are preferred in the invention.

A third preferred constituent of the cleaning agents according to the invention is the boric acid or the boric acid derivative. In addition to the boric acid, the boronic acids or their salts or esters are preferably used, in particular derivatives having aromatic groups, for example ortho, meta or para-substituted phenylboronic acids, in particular 4-formylphenylboronic acid (4-FPBA), or the salts or esters of the compounds mentioned. A particularly preferred boric acid derivative which is particularly effective with respect to the stabilization of the detergent or cleaning agent preparation is 4-formylphenylboronic acid. Preferred cleaning agents according to the invention are therefore characterized in that the cleaning agent is a phenylboronic acid derivative having the structural formula

in which R is hydrogen, a hydroxyl, a C ₁ -C ₆ alkyl, a substituted C ₁ -C ₆ alkyl, a C ₁ -C ₆ alkenyl or a substituted C ₁ -C ₆ Alkenyl group is, with 4-formyl-phenyl boronic acid is particularly preferred and the weight ratio of the phenylboronic acid derivative in the total weight of the cleaning agent preferably 0.001 to 2 wt .-%, preferably 0.01 to 1, 5 wt .-% and in particular 0.1 to 1 wt .-% is.

The liquid detergents may contain, in addition to the ingredients described above, other substances which are active in washing or cleaning, substances selected from the group of surfactants. de, builders, polymers, glass corrosion inhibitors, corrosion inhibitors, fragrances and perfume carriers are preferred. These preferred ingredients will be described in more detail below.

The composition of some further preferred cleaning agents according to the invention can be taken from the following tables (in% by weight):

Table 3

Table 4

Table 5

A preferred constituent of the cleaning agents according to the invention are the nonionic surfactants, nonionic surfactants of the general formula R -CH (OH) CH ₂ O- (AO) w- (AO) _x - (A "O) _y - (A '" O) _z -R ² , in the R is a straight-chain or branched, saturated or mono- or polyunsaturated C ₆ _24 -alkyl or -alkenyl radical;

R ^{2 is} a linear or branched hydrocarbon radical having 2 to 26 carbon atoms;

A, Α ', A "and A'" independently represent a radical from the group -CH ₂ CH ₂ , -CH ₂ CH ₂ -CH ₂ , -CH ₂ "CH (CH ₃ ), -CH ₂ -CH ₂ -CH ₂ -CH ₂ , -CH ₂ -CH (CH ₃ ) -CH ₂ -, -CH ₂ - CH (CH ₂ -CH ₃ ),

w, x, y and z are values between 0.5 and 120, where x, y and / or z can also be 0

are preferred.

By the addition of the aforementioned nonionic surfactants of the general formula R - CH (OH) CH ₂ O- (AO) w - (AO) _x - (A "O) _y - (A '" O) _z -R ² , hereinafter also As "hydroxy mixed ethers", surprisingly, the cleaning performance of inventive enzyme-containing preparations can be significantly improved both in comparison to surfactant-free system and in comparison to systems containing alternative nonionic surfactants, for example from the group of polyalkoxylated fatty alcohols.

By using these nonionic surfactants having one or more free hydroxyl groups on one or both terminal alkyl radicals, the stability of the enzymes contained in the detergent or cleaning agent preparations according to the invention can be markedly improved.

Preference is given in particular to those end-capped poly (oxyalkylated) nonionic surfactants which, in accordance with the formula R 0 [CH ₂ CH ₂ O] _x CH ₂ CH (OH) R ² , in addition to a radical R which is linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having 2 to 30 carbon atoms, preferably having 4 to 22 carbon atoms, furthermore a linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radical R ² having 1 to 30 carbon atoms, where x is between 1 and 90, preferably for values between 30 and 80 and in particular for values between 30 and 60.

Particularly preferred are surfactants of the formula R 0 [CH ₂ CH (CH ₃ ) O] _x [CH ₂ CH ₂ O] _y CH ₂ Cl-1 (OI-l) R ² , in which R is a linear or branched aliphatic hydrocarbon radical with 4 to 18 carbon atoms or mixtures thereof, R ² denotes a linear or branched hydrocarbon radical having 2 to 26 carbon atoms or mixtures thereof and x represents values between 0.5 and 1, 5 and y represents a value of at least 15.

The group of these nonionic surfactants include, for example, the C ₂ -26 fatty alcohol (PO) i (EO) i ₅ . 4o-2-hydroxyalkyl ethers, in particular also the C ₈ -io-fatty alcohol (PO) i (EO) ₂₂ -2-hydroxydecyl ethers. Particular preference is furthermore given to those end-capped poly (oxyalkylated) nonionic surfactants of the formula R 0 [CH ₂ CH ₂ O] _x [CH ₂ CH (R ³ ) O] _y CH ₂ CH (OH) R ² , in which R and R ^{2 are} independent each represent a linear or branched, saturated or mono- or polyunsaturated hydrocarbon radical having 2 to 26 carbon atoms, R ^{3 is} independently selected from -CH ₃ , -CH ₂ CH ₃ , -CH ₂ CH ₂ -CH ₃ , - CH (CH ₃ ) ₂ , but preferably represents -CH ₃ , and x and y independently of one another represent values between 1 and 32, wherein nonionic surfactants with R ³ = -CH ₃ and values for x from 15 to 32 and y from 0 , 5 and 1, 5 are very particularly preferred.

Further preferred nonionic surfactants are the end-capped poly (oxyalkylated) nonionic surfactants of the formula R 0 [CH ₂ CH (R ³ ) O] _x [CH ₂ ] _k CH (OH) [CH ₂ ] _j OR ² in which R and R ² are linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having 1 to 30 carbon atoms, R ³ is H or a methyl, ethyl, n-propyl, iso-propyl, n-butyl, 2-butyl or 2-methyl-2-butyl radical, x are values between 1 and 30, k and j are values between 1 and 12, preferably between 1 and 5. When the value x> 2, each R ³ in the above formula R 0 [CH ₂ CH (R ³ ) O] _x [CH ₂ ] _k CH (OH) [CH ₂ ] _j OR ^{2 may be} different. R and R ² are preferably linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having 6 to 22 carbon atoms, with radicals having 8 to 18 carbon atoms being particularly preferred. For the radical R ³ , H, -CH ₃ or -CH ₂ CH _{3 are} particularly preferred. Particularly preferred values for x are in the range from 1 to 20, in particular from 6 to 15.

As described above, each R ³ in the above formula may be different if x> 2. As a result, the alkylene oxide unit in the square bracket can be varied. For example, when x is 3, the radical R ^{3 may be} selected to form ethylene oxide (R ³ = H) or propylene oxide (R ³ = CH ₃ ) units which may be joined in any order, for example (EO ) (PO) (EO), (EO) (EO) (PO), (EO) (EO) (EO), (PO) (EO) (PO), (PO) (PO) (EO) and (PO ) (PO) (PO). The value 3 for x has been selected here by way of example and may well be greater, with the variation width increasing with increasing x values and including, for example, a large number (EO) groups combined with a small number (PO) groups, or vice versa ,

Particularly preferred end-capped poly (oxyalkylated) alcohols of the above formula have values of k = 1 and j = 1, so that the above formula zu

R 0 [CH ₂ CH (R ³ ) O] _x CH ₂ CH (OH) CH ₂ OR ² simplified. In the latter formula, R, R ² and R ^{3 are} as defined above and x is from 1 to 30, preferably from 1 to 20 and in particular from 6 to 18. Particularly preferred are surfactants in which the radicals R and R ² Have 9 to 14 carbon atoms, R ^{3 is} H and x assumes values of 6 to 15. Finally, the nonionic surfactant of the general formula have proven to be particularly effective

R -CH (OH) CH ₂ O- (AO) _w -R ² proved in the

R stands for a straight-chain or branched, saturated or mono- or polyunsaturated _C6 -24 alkyl or alkenyl group;

R ^{2 is} a linear or branched hydrocarbon radical having 2 to 26 carbon atoms;

A is a radical from the group CH ₂ CH ₂ , -CH ₂ CH ₂ -CH ₂ , -CH ₂ -CH (CH ₃ ), and

w stands for values between 1 and 120, preferably 10 to 80, in particular 20 to 40

The group of these nonionic surfactants includes, for example, the C 4-22 fatty alcohol (EO) i ₀ -8o-2-hydroxyalkyl ethers, in particular also the C ₈ -12 fatty alcohol (EO) ₂ 2-2-hydroxydecyl ethers and the C ₄ . 22 fatty alcohol (EO) ₄₀ -8o-2-hydroxyalkyl ethers

Preferred liquid cleaning agents are characterized in that the cleaning agent contains at least one nonionic surfactant, preferably a nonionic surfactant from the group of hydroxy mixed ethers, wherein the weight fraction of the nonionic surfactant in the total weight of the cleaning agent preferably 0.5 to 10 wt .-%, preferably 1 , 0 to 8.0 wt .-% and in particular 2.0 to 6.0 wt .-% is.

Preferred automatic dishwashing agents according to the invention may contain, in addition to the nonionic surfactants described above, further surfactants, in particular amphoteric surfactants. However, the proportion of anionic surfactants in the total weight of the detergents is preferably limited. Thus, preferred liquid detergents are characterized in that the detergent based on its total weight less than 5, 0 wt .-%, preferably less than 3.0 wt .-%, more preferably less than 1, 0 wt .-% and in particular no Contains anionic surfactant. The use of anionic surfactants is omitted in particular to avoid excessive foaming.

Table 6

Table 7

Table 8

Recipe 1 Recipe 2 Recipe 3 Recipe 4

Amylase preparation 0.001 to 5.0 0.01 to 4.0 0.05 to 3.0 0.075 to 2.0

Calcium lactate 0.05 to 10 0, 1 to 8.0 0.2 to 5.0 0.25 to 2.5

4-Formylphenylboronic acid 0.001 to 2.0 0.01 to 1.5, 0.01 to 1.5, 0.01 to 1.0

Hydroxymix ethers 0.5 to 10 1, 0 to 8.0 1, 0 to 8.0 2.0 to 6.0

Anionic surfactant <5.0 <3.0 <1, 0 <1, 0

Water 20 to 70 20 to 70 20 to 70 20 to 70

Mise Add 100 Add 100 Add 100 Add 100 Table 9

Another preferred ingredient of detergents according to the invention are complexing agents. Particularly preferred complexing agents are the phosphonates. The complex-forming phosphonates comprise, in addition to the 1-hydroxyethane-1, 1-diphosphonic acid, a number of different compounds such as diethylenetriamine penta (methylenephosphonic acid) (DTPMP). Hydroxyalkane or aminoalkane phosphonates are particularly preferred in this application. Among the hydroxyalkane phosphonates, the 1-hydroxyethane-1,1-diphosphonate (HEDP) is of particular importance as a cobuilder. It is preferably used as the sodium salt, the disodium salt neutral and the tetrasodium salt alkaline (pH 9). Preferred aminoalkanephosphonates are ethylenediamine tetramethylenephosphonate (EDTMP), diethylenetriaminepentamethylenephosphonate (DTPMP) and their higher homologs. They are preferably in the form of neutral sodium salts, eg. B. as the hexasodium salt of EDTMP or as hepta- and octa-sodium salt of DTPMP used. The builder used here is preferably HEDP from the class of phosphonates. The aminoalkane phosphonates also have a pronounced Schwermetallbindevermogen. Accordingly, in particular if the agents also contain bleach, it may be preferable to use aminoalkanephosphonates, in particular DTPMP, or to use mixtures of the phosphonates mentioned.

For the purposes of this application, preferred detergent or cleaner composition A comprises one or more phosphonates from the group

a) aminotrimethylenephosphonic acid (ATMP) and / or salts thereof;

b) ethylenediaminetetra (methylenephosphonic acid) (EDTMP) and / or salts thereof;

c) diethylenetriamine penta (methylenephosphonic acid) (DTPMP) and / or salts thereof;

d) 1-hydroxyethane-1, 1-diphosphonic acid (HEDP) and / or salts thereof;

e) 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and / or salts thereof;

f) hexamethylenediaminetetra (methylenephosphonic acid) (HDTMP) and / or salts thereof; g) nitrilotri (methylenephosphonic acid) (NTMP) and / or salts thereof. Particular preference is given to washing or cleaning agent compositions A which comprise, as phosphonates, 1-hydroxyethane-1,1-diphosphonic acid (HEDP) or diethylenetriaminepentane (methylenephosphonic acid) (DTPMP).

Of course, the cleaning agents according to the invention may contain two or more different phosphonates.

Preferred cleaning agents according to the invention are characterized in that the cleaning agent contains at least one complexing agent from the group of the phosphonates, preferably 1-hydroxyethane-1, 1-diphosphonate, wherein the weight fraction of the phosphonate in the total weight of the cleaning agent is preferably 0.1 and 8.0 wt .-%, preferably 0.2 and 5.0 wt .-% and in particular 0.5 and 3.0 wt .-% is.

Table 10

Table 1 1

Recipe 1 Recipe 2 Recipe 3 Recipe 4

Amylase preparation 0.001 to 5.0 0.01 to 4.0 0.05 to 3.0 0.075 to 2.0

Calcium lactate 0.05 to 10 0, 1 to 8.0 0.2 to 5.0 0.25 to 2.5

4-Formylphenylboronic acid 0.001 to 2.0 0.01 to 1.5, 0.01 to 1.5, 0.01 to 1.0

Phophonate 0.1 to 8.0 0, 1 to 8.0 0.2 to 5.0 0.5 to 3.0

Water 20 to 70 20 to 70 20 to 70 20 to 70

Mise Add 100 Add 100 Add 100 Add 100 Table 12

Table 13

The cleaning agents according to the invention preferably further comprise builder. The builders include, in particular, the silicates, carbonates, organic co-builders and, where there are no ecological prejudices against their use, also the phosphates.

Among the large number of commercially available phosphates, the alkali metal phosphates, with particular preference of pentasodium triphosphate, Na ₅ P ₃ Oi ₀ (sodium tripolyphosphate) or Pentakaliumtriphosphat, K ₅ P ₃ Oi ₀ (potassium tripolyphosphate) for the compositions of the invention the greatest importance.

If phosphates are used as cleaning-active substances in the liquid cleaning agent in the context of the present application, preferred agents contain this phosphate (s), preferably pentakalium triphosphate, wherein the weight fraction of the phosphate in the total weight of the cleaning agent is preferably 5.0 and 40, wt. -%, preferably 10 and 30 wt .-% and in particular 12 and 25 wt .-% is. Particularly suitable organic co-builders are polycarboxylates / polycarboxylic acids, polymeric polycarboxylates, aspartic acid, polyacetals, dextrins, further organic cobuilders and phosphonates. These classes of substances are described below.

Useful organic builders are, for example, the polycarboxylic acids which can be used in the form of the free acid and / or their sodium salts, polycarboxylic acids meaning those carboxylic acids which carry more than one acid function. These are, for example, citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA), if such use is not objectionable for ecological reasons, and mixtures of these. In addition to their builder effect, the free acids also typically have the property of an acidifying component and thus also serve to set a lower and milder pH of detergents or cleaners. In particular, citric acid, succinic acid, glutaric acid, adipic acid, gluconic acid and any desired mixtures of these can be mentioned here.

The citric acid or salts of citric acid are used with particular preference as builder substance.

Another particularly preferred builder substance is methylglycine diacid (MGDA).

Further suitable builders are polymeric polycarboxylates, for example the alkali metal salts of polyacrylic acid or of polymethacrylic acid, for example those having a relative molecular mass of from 500 to 70,000 g / mol.

For the purposes of this document, the molecular weights stated for polymeric polycarboxylates are weight-average molar masses M _{w of} the particular acid form, which were determined in principle by gel permeation chromatography (GPC), a UV detector being used. The measurement was carried out against an external polyacrylic acid standard, which provides realistic molecular weight values due to its structural relationship with the polymers investigated. These data differ significantly from the molecular weight data in which polystyrenesulfonic acids are used as standard. The molar masses measured against polystyrenesulfonic acids are generally significantly higher than the molecular weights specified in this document.

Suitable polymers are, in particular, polyacrylates which preferably have a molecular weight of 2,000 to 20,000 g / mol. Because of their superior solubility, the short-chain polyacrylates, which have molar masses of from 2000 to 10000 g / mol, and particularly preferably from 3000 to 5000 g / mol, may again be preferred from this group. Also suitable are copolymeric polycarboxylates, in particular those of acrylic acid with methacrylic acid and of acrylic acid or methacrylic acid with maleic acid. Copolymers of acrylic acid with maleic acid which contain 50 to 90% by weight of acrylic acid and 50 to 10% by weight of maleic acid have proven to be particularly suitable. Their relative molecular weight, based on free acids, is generally from 2000 to 70000 g / mol, preferably from 20,000 to 50,000 g / mol and in particular from 30,000 to 40,000 g / mol.

Oxydisuccinates and other derivatives of disuccinates, preferably ethylenediamine disuccinate, are further suitable co-builders. In this case, ethylenediamine-Ν, Ν ^' disuccinate (EDDS) is preferably used in the form of its sodium or magnesium salts. Also preferred in this context are glycerol disuccinates and glycerol trisuccinates.

To improve the cleaning performance and / or to adjust the viscosity, preferred liquid detergents contain at least one hydrophobically modified polymer, preferably a hydrophobically modified carboxylic acid group-containing polymer, wherein the weight fraction of the hydrophobically modified polymer in the total weight of the cleaning agent is preferably 0.1 to 10% by weight. %, preferably between 0.2 and 8.0 wt .-% and in particular 0.4 to 6.0 wt .-% is.

In addition to the builders described above, detergent-active polymers may be included in the detergent. The proportion by weight of cleaning-active polymers in the total weight of mechanical cleaning agents according to the invention is preferably from 0.1 to 20% by weight, preferably from 0.1 to 15% by weight and in particular from 2.0 to 12% by weight.

As cleaning-active polymers are preferably used sulfonic acid-containing polymers, in particular from the group of copolymeric polysulfonates. These copolymeric polysulfonates contain not only sulfonic acid-containing monomer (s) but also at least one monomer selected from the group consisting of unsaturated carboxylic acids.

As unsaturated carboxylic acid (s) is / are used with particular preference unsaturated carboxylic acids of the formula R (R ² ) C = C (R ³ ) COOH, in which R to R ³ independently of -H, - CH ₃ , a straight-chain or branched saturated alkyl radical having 2 to 12 carbon atoms, a straight-chain or branched, mono- or polyunsaturated alkenyl radical having 2 to 12 carbon atoms, alkyl or alkenyl radicals substituted by -NH ₂ , -OH or -COOH as defined above or -COOH or - COOR ⁴ is where R ^{4 is} a saturated or unsaturated, straight-chain or branched hydrocarbon radical having 1 to 12 carbon atoms.

Particularly preferred unsaturated carboxylic acids are acrylic acid, methacrylic acid, ethacrylic acid, α-chloroacrylic acid, α-cyanoacrylic acid, crotonic acid, α-phenyl-acrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid, methylenemalonic acid, sorbic acid, cinnamic acid. acid or mixtures thereof. Naturally, it is also possible to use the unsaturated dicarboxylic acids.

In the case of the monomers containing sulfonic acid groups, preference is given to those of the formula R ⁵ (R ⁶ ) C =C (R ⁷ ) -X-SO ₃ H in which R ⁵ to R ⁷ independently of one another are -H, -CH ₃ , a straight-chain one or branched saturated alkyl radical having 2 to 12 carbon atoms, a straight-chain or branched, mono- or polyunsaturated alkenyl radical having 2 to 12 carbon atoms, alkyl or alkenyl radicals substituted by -NH ₂ , -OH or -COOH or -COOH or -COOR ⁴ wherein R ^{4 is} a saturated or unsaturated, straight-chain or branched hydrocarbon radical having 1 to 12 carbon atoms, and X is an optional spacer group which is selected from - (CH ₂ ) _n - with n = 0 to 4, -COO - (CH ₂ ) _k - with k = 1 to 6, -C (O) -NH-C (CH ₃ ) ₂ -, -C (O) -NH-C (CH ₃ ) ₂ -CH ₂ - and - C (O) -NH-CH (CH ₂ CH ₃ ) -.

Preferred among these monomers are those of the formulas

H ₂ C = CH-X-SO ₃ H

H ₂ C = C (CH ₃ ) -X-SO ₃ H

H0 ₃ SX- (R ⁶ ) C = C (R ⁷ ) -X-SO ₃ H, in which R ⁶ and R ^{7 are} independently selected from -H, -CH ₃ , -CH ₂ CH ₃ ,

-CH ₂ CH ₂ CH ₃ , -CH (CH ₃ ) ₂ and X is an optional spacer group selected from - (CH ₂ ) _n - where n = 0 to 4, -COO- (CH ₂ ) _k - with k = 1 to 6, -C (O) -NH-C (CH ₃ ) ₂ -, - C (O) -NH-C (CH ₃ ) ₂ -CH ₂ - and -C (O) -NH -CH (CH ₂ CH ₃ ) -.

Particularly preferred monomers containing sulfonic acid groups are 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3 Methacrylamido-2-hydroxypropanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3- (2-propenyloxy) propanesulfonic acid, 2-methyl-2-propenylsulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate , Sulfomethacrylamide, sulfomethylmethacrylamide and mixtures of said acids or their water-soluble salts.

In the polymers, the sulfonic acid groups may be wholly or partly in neutralized form. The use of partially or fully neutralized sulfonic acid-containing copolymers is preferred according to the invention. The molar mass of the sulfo copolymers preferably used according to the invention can be varied in order to adapt the properties of the polymers to the desired end use. Preferred automatic dishwasher detergents are characterized in that the copolymers have molar masses of from 2000 to 200,000 gmol ¹ , preferably from 4000 to 25,000 gmol ¹ and in particular from 5000 to 15,000 gmol ^-1 .

In a further preferred embodiment, in addition to the carboxyl group-containing monomer and the sulfonic acid group-containing monomer, the copolymers further comprise at least one nonionic, preferably hydrophobic monomer. The use of these hydrophobically modified polymers has made it possible in particular to improve the rinse aid performance of automatic dishwashing detergents according to the invention.

A detergent containing a copolymer comprising

i) carboxylic acid group-containing monomer (s)

ii) sulfonic acid group-containing monomer (s)

iii) nonionic monomer (s).

are preferred according to the invention. The use of these terpolymers has improved the rinse performance of automatic dishwashing agents according to the invention compared to comparable dishwashing detergents which contain sulfopolymers without the addition of nonionic monomers.

As nonionic monomers are preferably monomers of the general formula

R (R ² ) C = C (R ³ ) -XR ⁴ used, in which R to R ^{3 are} independently -H, -CH ₃ or -C ₂ H ₅ , X is an optional spacer group selected is from -CH ₂ -, -C (0) 0- and -C (0) -NH-, and R ^{4 is} a straight or branched chain saturated alkyl radical having 2 to 22 carbon atoms or an unsaturated, preferably aromatic radical having 6 to 22 carbon atoms.

Particularly preferred nonionic monomers are butene, isobutene, pentene, 3-methylbutene, 2-methylbutene, cyclopentene, hexene, hexene-1, 2-methylpentene-1, 3-methylpentene-1, cyclohexene, methylcyclopentene, cycloheptene, methylcyclohexene, 2,4 , 4-trimethylpentene-1, 2,4,4-trimethylpentene-2,3,3-dimethylhexene-1, 2,4-dimethylhexene-1, 2,5-dimethlyhexene-1,3,5-dimethylhexene-1 , 4,4-Dimehtylhexan-1, ethylcyclohexyn, 1-octene, α-olefins having 10 or more carbon atoms such as 1-decene, 1-dodecene, 1-hexadecene, 1-octadecene and C22-α-olefin, 2-styrene , α-methylstyrene, 3-methylstyrene, 4-propylstryol, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4-benzylstyrene, 1-vinylnaphthalene, 2, vinylnaphthalene, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, methac methyl rylate, N- (methyl) acrylamide, 2-ethylhexyl acrylate, 2-methacrylic acid Ethylhexyl ester, N- (2-ethylhexyl) acrylamide, octyl acrylate, octyl acrylate, N- (octyl) acrylamide, lauryl acrylate, lauryl methacrylate, N- (lauryl) acrylamide, acrylic acid stearyl ester, methacrylic acid stearyl ester, N- (stearyl) acrylamide, behenyl acrylate, methac By-butyl behenyl ester and N- (behenyl) acrylamide or mixtures thereof.

The proportion by weight of the sulfonic acid-containing copolymers in the total weight of cleaning agents according to the invention is preferably from 0.1 to 15% by weight, preferably from 0.1 to 12% by weight and in particular from 2.0 to 10% by weight.

Table 14

Table 15

Recipe 1 Recipe 2 Recipe 3 Recipe 4

Amylase preparation 0.001 to 5.0 0.01 to 4.0 0.05 to 3.0 0.075 to 2.0

Calcium lactate 0.05 to 10 0, 1 to 8.0 0.2 to 5.0 0.25 to 2.5

Sorbitol 1, 0 to 10 2.0 to 8.0 2.0 to 8.0 3.0 to 6.0

4-Formylphenylboronic acid 0.001 to 2.0 0.01 to 1.5, 0.01 to 1.5, 0.01 to 1.0

Sulfonic acid-containing copoly-0.1 to 15 1, 0 to 12 2.0 to 10 2.0 to 10 mer

Phophonate 0.1 to 8.0 0, 1 to 8.0 0.2 to 5.0 0.5 to 3.0

Hydroxymix ethers 0.5 to 10 1, 0 to 8.0 1, 0 to 8.0 2.0 to 6.0

Water 20 to 70 20 to 70 20 to 70 20 to 70

Mise Add 100 Add 100 Add 100 Add 100 Table 16

A further subject of the present application is a method for the automated cleaning of dishes using a machine dishwashing detergent according to the invention.

The dosage of the cleaning agent according to the invention in the cleaning liquor can be done for example by means of the metering chamber in the door or an additional metering in the interior of the dishwasher. Alternatively, the cleaning agent can also be applied directly to the soiled dishes or to one of the inner walls of the dishwasher, for example the inside of the door.

The implementation of the method according to the invention takes place in the interior of a commercial dishwasher. The cleaning program can be selected and determined in a dishwasher usually before the dishwashing process by the consumer. The cleaning program of the dishwasher used in the method according to the invention comprises at least one prewash cycle and one cleaning cycle. Cleaning programs which include further cleaning or rinsing cycles, for example a rinse cycle, are preferred according to the invention.

The process according to the invention is particularly preferably part of a cleaning program, comprising a prewash cycle, a cleaning cycle and a rinse cycle. The automatic dishwashing detergent programs may differ in terms of their duration, their water consumption and the temperature of the cleaning liquor. The inventive method is preferably used in conjunction with such cleaning programs in which the wash liquor is heated in the course of the cleaning cycle.

In a preferred embodiment of the method according to the invention, the cleaning cycle, in the course of which the detergent according to the invention is metered into the interior of the dishwasher, is characterized in that in its course the temperature of the cleaning liquor is above 30 ° C., preferably above 40 ° C. and especially above 50 ° C increases.

Preferred embodiments of the automatic dishwashing process according to the invention result mutatis mutandis from the previous description of preferred embodiments of the detergent according to the invention, to which reference is made to avoid repetition at this point.

As stated above, the addition of calcium lactate is particularly suitable for the stabilization of amylases in liquid detergents. A further subject of this application is therefore the use of calcium lactate for the stabilization of amylase in liquid detergents, preferably in liquid detergents with a water content between 20 and 70 wt .-%.

Preferred embodiments of the use according to the invention emerge mutatis mutandis from the previous description of preferred embodiments of the cleaning agent according to the invention, to which reference is made to avoid repetition at this point.

For example, the use of the following active substance combinations for stabilizing amylases in liquid cleaning agents, preferably in liquid cleaning agents having a water content between 20 and 70% by weight, is particularly preferred:

Calcium lactate 4-formylphenylboronic acid (4-FPBA)

Calcium lactate 4-formylphenyl sorbitol

Boronic acid (4-FPBA)

Calcium lactate 4-formylphenyl sorbitol hydroxy mixed ether

Boronic acid (4-FPBA)

Calcium lactate sorbitol

Calcium lactate sorbitol hydroxy mixed ether

Calcium lactate hydroxy mixed ether

Calcium lactate 4-formylphenyl hydroxymix ether

Boronic acid (4-FPBA)

Examples

The following two detergent formulations V1 and E1 were provided:

Hydrophobically modified polycarboxylate

Hydrophobically modified polysulfonate For both cleaning agents V1 and E1 the cleaning performance was determined according to the IKW method (Miele G 698 SC, 50 ° C normal, 21 ° dH).

The cleaning performance is determined without storage and after four weeks of storage for the stains tea, milk, minced meat, egg yolk, oatmeal and starch (10 = complete cleaning, 0 = no cleaning):

As can be seen from these experimental results, the cleaning agent stabilized by the addition of calcium lactate, in particular after storage on the stains relevant for the amylase, has significantly better cleaning results than the calcium-lactate-free cleaning agent.

Claims

claims

1. Liquid detergent containing

a) 20 to 70 wt .-% water

b) at least one amylase preparation

c) at least one Ca ²⁺ ion source

d) lactic acid or a lactic acid salt

2. Liquid detergent according to claim 1, characterized in that the weight proportion of the active protein of the amylase preparation in the total weight of the cleaning agent between 0.001 and 5.0 wt .-%, preferably between 0.01 and 4.0 wt .-%, preferably between 0.05 and 3.0 wt .-% and in particular between 0.075 and 2.0 wt .-% is.

3. Liquid detergent according to one of the preceding claims, characterized in that the liquid detergent contains calcium acetate, wherein the proportion by weight of the calcium lactate in the total weight of the detergent preferably 0.05 to 10 wt .-%, preferably 0, 1 to 8.0 wt. -%, particularly preferably 0.2 to 5.0 wt .-% and in particular 0.25 to 2.5 wt .-% is.

3. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent is a phenylboronic acid derivative having the structural formula

in which R is hydrogen, a hydroxyl, a C ₁ -C ₆ alkyl, a substituted C ₁ -C ₆ alkyl, a C ₁ -C ₆ alkenyl or a substituted C ₁ -C ₈ alkenyl group wherein 4-formyl-phenyl boronic acid is particularly preferred and the proportion by weight of the phenylboronic acid derivative in the total weight of the cleaning agent preferably 0.001 to 2 wt .-%, preferably 0.01 to 1, 5 wt .-% and in particular 0.1 to 1 wt .-% is.

4. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent contains at least one alditol, preferably sorbitol, wherein the weight fraction of the alditol on the total weight of the cleaning agent preferably 1, 0 to 10% by weight, preferably 2.0 to 8 , 0 wt .-% and in particular 3.0 to 6.0 wt .-% is.

5. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent contains at least one nonionic surfactant, preferably a nonionic surfactant from the group of Hydroxymischether, wherein the weight fraction of the nonionic surfactant in the total weight of the cleaning agent preferably 0.5 to 10 wt .-%, preferably 1, 0 to 8.0 wt .-% and in particular 2.0 to 6.0 wt .-% is.

6. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent contains at least one complexing agent from the group of phosphonates, preferably 1-hydroxyethane-1, 1-diphosphonate, wherein the weight fraction of the phosphonate on the total weight of the cleaning agent is preferably 0.1 and 8.0 wt .-%, preferably 0.2 and 5.0 wt .-% and in particular 0.5 and 3.0 wt .-% is.

7. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent contains at least one builder from the group of phosphates, preferably Pentakaliumtriphosphat, wherein the weight fraction of the phosphate in the total weight of the cleaning agent is preferably 5.0 and 40, wt .-% , preferably 10 and 30 wt .-% and in particular 12 and 25 wt .-% is.

8. Liquid detergent according to one of the preceding claims, characterized in that the cleaning agent contains at least one hydrophobically modified polymer, preferably a hydrophobically modified carboxylic acid group-containing polymer, wherein the weight fraction of the hydrophobically modified polymer in the total weight of the cleaning agent preferably 0, 1 to 10 Wt .-%, preferably between 0.2 and 8.0 wt .-% and in particular 0.4 to 6.0 wt .-% is.

A method of machine dishwashing using a machine dishwashing composition according to any one of the preceding claims.

10. Use of calcium lactate for stabilizing amylase in liquid detergents.