Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/825—Mixtures of compounds all of which are non-ionic

Definitions

• the present application relates to the use of selected fatty alcohol alkoxylates in detergents and cleaners, preferably those for use in automatic dishwashing processes containing these fatty alcohol alkoxylates.
• the cleaning of hard surfaces and especially the washing of dishes makes special demands on the cleaner used. This applies in particular to automatic dishwashing.
• the three components of the machine system are cleaner, rinse aid and regeneration salt for water softening.
• the central tasks of the main component cleaners are the soil release, the dirt dispersion, the binding of residual water hardness and the corrosion inhibition.
• many manufacturers today offer their customers multifunctional dishwashing detergents, i. that the cleaner additionally contains agents for rinsing and water softening or gloss retention on metallic surfaces or protection against silver discoloration after cleaning, so that the customer does not have to achieve these functions by separate means, but achieved only by a form of supply the desired benefit.
• the rinse aid performance It is determined how large the proportion of deposits on the dishes, after they were rinsed.
• the deposits are essentially mineral compounds, in particular Ca and / or Mg salts, but also surfactant residues.
• lime mainly leads to undesirable deposits for the user.
• common dishwashing agents in particular those for automatic dishwashing, generally contain so-called rinse aid.
• rinse aids are usually mixtures of low foaming nonionic surfactants, typically fatty alcohol polyethylene / polypropylene glycol ethers, solubilizers (eg cumene sulfonate), organic acids (eg citric acid) and solvents (eg ethanol)
• solubilizers eg cumene sulfonate
• organic acids eg citric acid
• solvents eg ethanol
• a first subject of the invention relates to the use of alkoxylated fatty alcohols of the general formula (I) RO - (C n H 2n O) m -H, where R is a linear branched, saturated or unsaturated alkyl or alkenyl radical having at least 19 C Atoms and m is a number of greater than or equal to 20 and n is 2 or 3, in hard surface cleaners, especially in automatic dishwashing cleaners.
• Fatty alcohols are known to be a collective name for the linear, saturated or unsaturated primary alcohols (1-alkanols) having 6-22 carbon atoms obtainable by reduction of the triglycerides, fatty acids or fatty acid methyl esters.
• these products are accessible via the oxo reaction (hydroformylation).
• higher olefins are first prepared by the oligomerization of ethylene as an aluminum-organic compound, which is oxidized in a further step with atmospheric oxygen u. be hydrolyzed to the corresponding fatty alcohols.
• the alkoxylates of the fatty alcohols thereby represent a group of nonionic surfactants obtained by alkoxylation, i. Reaction with ethylene oxide (fatty alcohol ethoxylates, FAEO), propylene oxide or butylene oxide, but preferably ethoxylation of primary long-chain fatty or oxo alcohols in the presence of basic or acidic catalysts at temperatures of 120-200 ° C and pressures of 1-10 bar is obtained.
• ethylene oxide fatty alcohol ethoxylates, FAEO
• propylene oxide or butylene oxide but preferably ethoxylation of primary long-chain fatty or oxo alcohols in the presence of basic or acidic catalysts at temperatures of 120-200 ° C and pressures of 1-10 bar is obtained.
• a polyglycol ether mixture of varying degrees alkoxylated homologues their distribution depending on the catalyst and the amount of alkoxide between a statistic corresponding Gauss and a non-selective Schulz Flory Curve may vary.
• a narrow range (homo) distribution obtained in the presence of sodium hydroxide a wide, using alkaline earth salts, a narrow range (homo) distribution obtained.
• 1,4-dioxane as an undesired by-product, favored by acidic ethoxylation catalysts, and because of the risk of corrosion on the steel of the reaction vessel, preference is given in the art to basic catalysts, e.g. Sodium methylate in methanol or potassium hydroxide in water used.
• the fatty alcohol alkoxylates used according to the invention are long-chain, ie the alkyl or in the case of unsaturated alkenyl radicals has at least 19 C atoms, those alkoxylates are preferred whose alkyl or alkenyl radical 19 to 30, preferably 20 to 25 and in particular 21 to Contains 23 C atoms. Very particular preference is given to fatty alcohol alkoxylates based on behenyl alcohol, ie 22 C atoms in the alkyl chain.
• the radical R in the general formula (I) may be linear or branched, but the linear alkyl or alkenyl chains are preferred. The radical R can therefore be both saturated and monounsaturated or polyunsaturated. Preference is given to compounds of the formula (I) used, whose radical R is saturated. In the selection of suitable compounds of the formula (I), in particular those are preferred whose radical R is linear and saturated.
• the compounds of the formula (I) are alkoxylates. This includes compounds which have been prepared either by reaction with ethylene oxide (EO) or propylene oxide, but mixed alkoxylates of EO and PO are also suitable. Particularly preferred are those compounds of formula (I) wherein n is 2, i. the pure ethoxylates. In this case, those alkoxylates which have a narrow homolog distribution can be particularly preferred.
• the proportion of the alkoxylates, expressed by the index m of the general formula (I) is at least 20, or assumes a larger value.
• alkoxylates of the formula (I) are used as the sole alkoxylates, ie, for example, in a detergent as alkoxylates exclusively those of the formula (I) are included, preferably alkoxylates of the formula (I) with 22 C atoms find use.
• the preparation of the alkoxylates used according to the invention is carried out in a manner known per se.
• the starting alcohol is z. B. presented in the reactor and melted.
• An alkaline catalyst eg NaOMe 30% strength, is then added to the melt with stirring.
• the pressure is reduced, for example to ⁇ 40 mbar and at elevated temperature, for example 100-120 ° C, evacuated and filled with N 2 .
• the desired amount of ethylene oxide is then at further elevated temperatures, for example 160 ° C - 180 ° C and a pressure of max. 5 bar added.
• After completion of the reaction is cooled to about 100-120 ° C and evacuated again to ⁇ 40mbar.
• the product can be neutralized by adding stoichiometric amounts of acid (eg, lactic acid, acetic acid, citric acid, phosphoric acid) and optionally filtered before filling.
• acid eg, lactic acid, acetic acid, citric acid, phosphoric acid
• the alkoxylates of the formula (I) are used, for example, as additives in cleaning agents, the use preferably being carried out in automatic dishwashing cleaners.
• the alkoxylates are preferably used in amounts of 0.1 to 25 wt .-%, preferably in amounts of 0.5 to 10 wt .-% and in particular in amounts of 1.0 to 5 wt .-%, based in each case on the Total weight of the cleaner.
• the alkoxylates can preferably be used in solid cleaners. However, it is not essential whether they are powders, granules, pellets, flakes or shaped articles, ie tablets or e.g. Cleaner in block form is.
• the fatty alcohol alkoxylates of the general formula (I) are not only suitable for use in cleaning or dishwashing detergents. It is also possible and preferred to use the alkoxylates in rinse aids both in solid and in liquid rinse aids.
• the alkoxylates can also be advantageously used in the form of compounds, preferably in combination with nonionic surfactants.
• Nonionic surfactants from the group of polyethylene glycols are alkyl (oligo) glycosides.
• Fatty alcohol alkoxylates with the exception of the compounds of formula (I), Polyolhydroxyalkylether and / or Hydroxymischether preferred.
• the alkoxylates of the formula ( I ) are compounded with the further compounds in a form suitable for the person skilled in the art and can then be further processed in this form.
• the present invention additionally makes use of the knowledge that the presence of the selected fatty alcohol alkoxylates of the general formula (I) as component a) in combination with structurally different surface-active compounds of the type b) have advantageous drying and / or drying properties the rinse performance of cleaner formulations for hard surfaces, and particularly dishwashing detergents.
• At least two surface-active compounds are combined, of which one component a) must necessarily be a fatty alcohol alkoxylate as described above and the other component b) is selected from one or more of the compounds b1) to b8) described below:
• Hydroxy mixed ethers follow the broad general formula R'O [AO] x CH 2 CH (OM) R ", in which R is a linear or branched alkyl and / or alkenyl radical having 4 to 22 carbon atoms, R "is a linear or branched alkyl and / or alkenyl radical having 2 to 22 carbon atoms x is 10 to 80 and AO is an ethylene oxide, Propylene oxide or butylene oxide radical symbolized and M can stand for a hydrogen atom or an alkyl or alkenyl radical
• Hydroxymischether are known from the literature and are for example in the German application DE 197 38 866 described.
• R "CHOCH 2 ) 1,2-epoxyalkanes
• R is an alkyl and / or alkenyl radical having 2 to 22, in particular 6 to 16, carbon atoms, with alkoxylated alcohols.
• Preferred in the context of the invention are those hydroxy mixed ethers which are derived from alkoxylates of monohydric alcohols of the formula R'-OH having 4 to 18 carbon atoms, where R is an aliphatic, saturated, straight-chain or branched alkyl radical, in particular having 6 to 16 carbon atoms ,
• R is an aliphatic, saturated, straight-chain or branched alkyl radical, in particular having 6 to 16 carbon atoms
• suitable straight-chain alcohols are butanol-1, caproic, eananthic, caprylic, pelargonic, capric alcohol, undecanol-1, lauryl alcohol, tridecanol-1, myristyl alcohol, pentadecanol-1, palmityl alcohol, heptadecanol-1, stearyl alcohol, nonadecanol- 1, arachidyl alcohol, heneicosanol-1, behenyl alcohol and their technical mixtures, as obtained in the high pressure hydrogen
• branched alcohols are so-called oxo alcohols, which usually carry 2 to 4 methyl groups as branches and are prepared by the oxo process and so-called Guerbet alcohols which are branched in the 2-position with an alkyl group.
• Suitable Guerbet alcohols are 2-ethylhexanol, 2-butyloctanol, 2-hexyldecanol and / or 2-octyldodecanol.
• the alcohols are used in the form of their alkoxylates, which are prepared by reaction of the alcohols with ethylene oxide in a known manner.
• other hydroxy mixed ethers are known, namely those which have more than one free hydroxyl group in the molecule.
• Such compounds can be prepared, for example, by reacting diols, preferably alkylene glycols and their derivatives, preferably polyethylene glycols, each with two moles of an alkyl epoxide (R-CHOCH 2 ) per mole of the diol.
• Preferred for the purposes of the invention are those hydroxy mixed ethers which are derived from ethoxylates of monohydric alcohols of the formula R 1 -OH having 6 to 18 carbon atoms, preferably 6 to 16 and especially 8 to 10 carbon atoms, where R 1 is a linear alkyl radical and x for 40 to 60.
• R 1 is a linear alkyl radical and x for 40 to 60.
• compounds of the general formula (IIa) are preferred in the mixtures according to the invention, in which the index x stands for a number from 40 to 70, preferably 40 to 60 and in particular from 40 to 50.
• M is then a hydrogen atom.
• hydroxy mixed ethers of the formula (IIa) where R 1 is an alkyl radical having 8 to 10 carbon atoms, in particular based on a native fatty alcohol, R 2 is an alkyl radical having 10 carbon atoms, in particular a linear alkyl radical and x is 40 to 60 stands.
• R 1 is an alkyl or alkenyl radical having 8 to 10 carbon atoms
• R 2 is a radical having 8 to 12 carbon atoms
• M is a saturated alkyl radical having 1 to 6, preferably 1 to 4 carbon atoms.
• the latter compound contains no free hydroxyl groups - rather, the hydroxyl functions have been alkylated with suitable reagents, for example alkyl halides.
• R 3 R 3 O [CH 2 CHCH 3 O] z [CH 2 CH 2 O] y CH 2 CH (OH)
• Particularly preferred compounds of the type b1) are, for example, those in which in the formula (IIb) the index y stands for a number from 20 to 30, preferably from 20 to 25.
• mixtures containing as surface-active compound of type b1) a compound of the general formula (IIb) in which R 3 is an alkyl and / or alkenyl radical having 8 to 12 carbon atoms and R 4 is an alkyl or Alkenyl radical having 8 to 10 carbon atoms and y is a number from 20 to 35 and z is a number from 1 to 3.
• the compounds of type b1) are also hydroxy mixed ether derivatives which can be prepared by reacting propoxylated and / or ethoxylated fatty alcohols with alkyl epoxides by ring opening in an alkaline medium.
• R 5 is linear or branched alkyl and / or alkenyl radicals having 8 to 22 carbon atoms and z is a number from 1 to 20, and preferably from 1 to 15, and especially from 1 to 10.
• Typical examples are the adducts of on average 1 to 20 moles of caproic alcohol, caprylic alcohol, 2-ethylhexyl alcohol, capric alcohol, lauryl alcohol, isotridecyl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and Brassidyl alcohol and their technical mixtures, for example, in the high-pressure hydrogenation of technical methyl esters based on fats and oils or aldehydes from the Roelen oxo synthesis and as a monomer fraction in the dimerization of unsaturated fatty alcohols incurred.
• Particularly preferred fatty alcohol ethoxylates are based on tallow alcohols ethoxylated with 2 to 10 and preferably 2 to 5 moles of ethylene oxide per mole of alcohol.
• R 6 CO- (OC 2 H 4 ) m -OR 7 where R 6 is an alkyl and / or alkenyl radical having 7 to 21 carbon atoms and m is a number from 11 to 100, and R 7 represents a hydrogen atom or a radical CO-R 6 .
• R 6 R 7
• R6 # R7 unbalanced connections
• compounds of the type b3) are based on polyethylene glycols having molecular weights between 1000 and 10,000 and preferably from 1500 to 6000 and especially from 1500 to 3000 are used in the erfindunlicen agents. Particular preference is given to diester compounds of type b3).
• polyglycols may also be present as by-products.
• alky (oligo) glycosides These compounds are also known as alky (oligo) glycosides.
• Alkyl and alkenyl oligoglycosides are known nonionic surfactants which follow the formula R 8 O- [G] p in which R 8 is an alkyl and / or alkenyl radical having 4 to 22 carbon atoms, G is a sugar radical having 5 or 6 carbon atoms and p stands for numbers from 1 to 10. They can be obtained by the relevant methods of preparative organic chemistry.
• the alkyl and / or alkenyl oligoglycosides can be derived from aldoses or ketoses having 5 or 6 carbon atoms, preferably glucose.
• the preferred alkyl and / or alkenyl oligoglycosides are thus alkyl and / or alkenyl oligoglucosides.
• alkyl and / or alkenyl oligoglycosides having an average degree of oligomerization p of from 1.1 to 3.0. From an application point of view, those alkyl and / or alkenyl oligoglycosides whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.4 are preferred.
• the alkyl or alkenyl radical R 8 can be derived from primary alcohols having 4 to 11, preferably 8 to 10 carbon atoms: Typical examples are butanol, caproic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, as used, for example, in the hydrogenation of technical fatty acid methyl esters or in the course of hydrogenation of aldehydes from the Roelen oxo synthesis can be obtained.
• the alkyl or alkenyl radical R 8 can also be derived from primary alcohols having 12 to 22, preferably 12 to 14 carbon atoms.
• Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, Oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol, and technical mixtures thereof which can be obtained as described above.
• Preference is given to alkyl oligoglucosides based on hydrogenated C 12/14 coconut alcohol having a DP of 1 to 3.
• Betaines are known surfactants which are predominantly produced by carboxyalkylation, preferably carboxymethylation of aminic compounds.
• the starting materials are condensed with halocarboxylic acids or their salts, in particular with sodium chloroacetate, wherein one mole of salt is formed per mole of betaine.
• unsaturated carboxylic acids such as acrylic acid is possible.
• betaines are the carboxyalkylation products of secondary and especially tertiary amines which follow formula (1) in the R 1 for alkyl and / or alkenyl radicals having 6 to 22 carbon atoms, R II is hydrogen or alkyl radicals having 1 to 4 carbon atoms, R III is alkyl radicals having 1 to 4 carbon atoms, n is from 1 to 6, and X is a Alkali and / or alkaline earth metal or ammonium.
• Typical examples are the carboxymethylation products of hexylmethylamine, hexyldimethylamine, octyldimethylamine, decyldimethylamine, dodecylmethylamine, dodecyldimethylamine, dodecylethylmethylamine, C 12/14 cocoalkyldimethylamine, myristyldimethylamine, cetyldimethylamine, stearyldimethylamine, stearylethylmethylamine, oleyldimethylamine, C 16/18 tallowalkyldimethylamine, and technical mixtures thereof.
• R IV CO is an aliphatic acyl radical having 6 to 22 carbon atoms and 0 or 1 to 3 double bonds
• m is a number from 1 to 3
• R II , R III , n and X have the meanings given above.
• Typical examples are reaction products of fatty acids having 6 to 22 carbon atoms, namely caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, arachic acid, gadoleic acid, behenic acid and erucic acid and their technical mixtures, with N, N-dimethylaminoethylamine, N, N-dimethylaminopropylamine, N, N-diethylaminoethylamine and N, N-diethylaminopropylamine, which are condensed with sodium chloroacetate.
• the use of a condensation product of C 8/18 coconut fatty acid N, N-dimethylaminopropylamide with sodium chloroacetate
• Suitable starting materials for the betaines to be used in the context of the invention are imidazolines which follow the formula (3), in which R V is an alkyl radical having 5 to 21 carbon atoms, R 6 is a hydroxyl group, an OCOR V or NHCOR V radical and m is 2 or 3.
• R V is an alkyl radical having 5 to 21 carbon atoms
• R 6 is a hydroxyl group
• an OCOR V or NHCOR V radical an hydroxyl group
• m is 2 or 3.
• These substances are also known substances which can be obtained, for example, by cyclizing condensation of 1 or 2 moles of fatty acid with polyhydric amines, such as, for example, aminoethylethanolamine (AEEA) or diethylenetriamine.
• AEEA aminoethylethanolamine
• the corresponding carboxyalkylation products are mixtures of different open-chain betaines.
• Typical examples are condensation products of the abovementioned fatty acids with AEEA, preferably
• nonionic compounds which are also known, are prepared, for example, by reacting alkyl epoxides with ethylene glycol and then with further ethylene oxide. These are also commercially available substances. They follow the general formula (IV) in which R 9 is a linear or branched alkyl and / or alkenyl radical having 4 to 22 carbon atoms and o is a number from 1 to 20 and the subscript p is zero or numbers from 1 to 20.
• R 10 CH (OR 11 ) CH 2 -OR 11 (V) in which R 10 is a saturated or unsaturated, branched or unbranched alkyl or alkenyl radical having 8 to 16 carbon atoms, and R 11 each independently of one another symbolizes a radical (CH 2 CH 2 O) r CH 2 CH (OH) R 12 , wherein r in each R 11 is independently zero or a number from 1 to 50 and R 12 is a saturated or unsaturated, branched or unbranched alkyl or alkenyl radical of 8 to 16 carbon atoms.
• R 10 is a saturated or unsaturated, branched or unbranched alkyl or alkenyl radical having 8 to 16 carbon atoms
• R 11 each independently of one another symbolizes a radical (CH 2 CH 2 O) r CH 2 CH (OH) R 12 , wherein r in each R 11 is independently zero or a number from 1 to 50 and R 12 is a saturated or unsaturated, branched or unbranched alkyl
• Compounds of type b8) are, for example obtainable by ethoxylation of alkylamines or of triethanolamine and subsequent reaction with alkylene oxides with alkyl chains having 8 to 18 carbon atoms under alkaline catalysis conditions.
• the compounds b1) to b8) can each be combined alone with at least one compound of the type a). Particularly preferred are binary mixtures of a) and a compound of type b) and in particular the compounds of type b1). However, it is also possible to combine mixtures of different substances of type class b) with those of type a). It may be advantageous for mixtures containing a plurality of different compounds of type b) to use these compounds in a weight ratio of 1: 1.
• the compounds of the type a) and b) are preferably present in a weight ratio of 10: 1 to 1:10 side by side in the mixtures according to the invention. However, preference may be given to those mixtures in which the surface-active compounds of the type a) and b) in a weight ratio of 5: 1 to 1: 5, in particular from 3: 1 to 1: 3 and particularly preferably from 2: 1 to 1: 2 and most preferably 1: 1 are present side by side.
• the compounds of type b1) to b8) can - as stated above - also be present side by side in any mixtures. Preferably, however, the mixtures consist only of a compound of type a) and a compound of type b).
• the mixtures described above are preferably suitable for use in cleaners, in particular in dishwashing detergents and in particular in automatic dishwashing detergents.
• the mixtures can be used to improve the drying performance and / or the rinsing performance of cleaning agents and in particular for dishwashing detergents, preferably dishwasher detergents for automatic dishwashing.
• the solid preparations according to the invention can in principle be prepared in any manner known to the person skilled in the art.
• this process may optionally follow a milling step.
• Another object of the present application relates to cleaning compositions for hard surfaces, containing surfactants, water softeners and optionally other ingredients, characterized in that the cleaning agent alkoxylated fatty alcohols of the general formula (I) RO- (C n H 2n O) m -H, wherein R is a linear branched, saturated or unsaturated alkyl or alkenyl radical having at least 19 C atoms and m is a number greater than or equal to 20 and n is 2 or 3, contain.
• These contain the alkoxylates of the general formula (I) according to the invention, preferably in amounts of from 0.1 to 25% by weight, based on the total weight of the cleaning agent.
• the cleaning agents according to the invention additionally contain other, other surfactants, which are preferably selected from the classes of polyethylene glycols, the alkyl (oligo) glycosides, the fatty alcohol alkoxylates with the exception of the compounds of formula (I), the Polyolhydroxyalkylether and the Hydroxymischether. Details can be found in the above description of the compound types b1) to b8), which are all suitable, alone or in combination with one another, to find use as surfactants in the cleaners according to the invention.
• the cleaning agents preferably contain the mixtures of surfactants of groups a) and b) as described above. In this case, those agents are preferred which contain these surfactant mixtures in amounts of 0.1 to 50 wt .-%, preferably 0.5 to 30 wt .-% and in particular in amounts of 2 to 25 wt .-%.
• the detergents themselves may furthermore preferably comprise as water softeners phosphates and / or polyacrylates, preferably in amounts of from 1 to 80% by weight, based on the total weight of the cleaning agents.
• the cleaners according to the invention may additionally contain enzymes, enzyme activators, bleaches, bleach boosters, complexing agents, disintegrants, dyes, biocides, solubilizers, fragrances or perfumes, inorganic Salts, carriers, soil repellents, corrosion inhibitors, and / or defoamers.
• Suitable inorganic or organic carriers are, for example, zeolites, alkali metal phosphates, alkali metal carbonates, alkali metal sulphates, alkali metal bicarbonates, alkali metal silicates, alkali metal citrates, polysaccharides and their derivatives or polymers and mixtures thereof.
• detergents according to the invention which are present in solid form, ie as granules, flakes, powders, pellets or lozenges or as shaped articles, such as tablets, and in particular as granules or as shaped articles.
• the preparation of the solid detergents can be carried out by methods such as grinding, scaling, pelleting, extrusion, prilling, dropping and / or drying and granulation in the thin-layer (flash-dryer). Optionally, several of these methods can be combined.
• a preferred embodiment uses the ethoxylates of the general formula (I) as granules, which is then formulated together with the other ingredients to the finished detergent.
• Particularly preferred preparation processes for ready-formulated detergents are granulation in the fluidized bed and extrusion.
• the detergents according to the invention are preferably present as multifunctional agents, i. that they include in a fixed supply form means for cleaning, means for rinsing and, where appropriate, additional means for water softening and / or metal cleaning or metal protection (so-called “2 in 1” or “3 in 1” or even “5 in 1” products ).
• a final object of the invention relates to a liquid rinse aid comprising at least water, a solubilizer and optionally an acid, preferably an organic acid, characterized in that in the rinse aid compounds of the general formula (I) in amounts of 0.1 to 25 wt. -% is included.
• a solubilizer all substances known to those skilled in the art can be used, for example short-chain alcohols, such as ethanol or propanol, or fatty acid esters and similar compounds. Ethanol is particularly preferred here.
• Preferred organic acids are preferably hydroxycarboxylic acids and in particular citric acid or its derivatives, for example esters or alkoxylates of citric acid.
• liquid agents which contain compounds of the formula (I) in amounts of from 0.2 to 20% by weight, preferably from 1.0 to 15% by weight and in particular from 1.5 to 10% by weight.
• the liquid agents can be adjusted in their viscosity and different on the one hand be low viscosity (such as water), but also present thickened, for example in the form of oils or gels or in paste form.
• the rinse aid is evaluated digitally using a method developed by Cognis for the quantitative measurement of deposits on solid surfaces.
• the method is described in European Patent Application 1 635 167 A1 , Plane materials made of glass, stainless steel, ceramics and various plastics are rinsed under defined conditions (water at 2 °, 16 ° and 21 ° dH (depending on the application) and 50 g of a standard stain *) in a household dishwasher. Thereafter, the items to be washed are measured in the measuring apparatus after staining and coating formation. The results are given as "significantly better / better than / worse than standard”.
• composition I II III IV V C16 / 18 fatty alcohol + 25 EO 2 C 16/18 fatty alcohol + 40 EO 2 C22 fatty alcohol + 10 EO 2 C22 fatty alcohol + 25 EO 2 C22 fatty alcohol + 25 EO granules 2
• Rinse aid on ++ significantly better cutlery 0 - + ++ ++ +: better porcelain 0 - 0 + + 0: comparable read 0 - + ++ ++ -: worse than standard plastic 0 0 - + + +
• Table 2 shows that the "3 in 1" ADD formulations according to the invention are better than the comparison formulation. This is particularly evident in the rinse aid on glass and stainless steel.
• Table 3 shows that the "5 in 1" ADD formulations II and III according to the invention are far better than the comparison formulation. This is particularly evident in the rinse aid on glass and stainless steel.
• Table 4 shows that the "4 in 1" ADD formulations II and III according to the invention are better than the comparative formulation I. This can be seen in the rinse aid on all surfaces. Compared to the incorporated melt, the granular form of C22 fatty alcohol + 25 EO tends to give better rinsing performance on stainless steel, glass and ceramics.
• the assessment of the foam behavior is carried out by means of the free-fall circulation method.
• 500mL of distilled water is placed in a double-walled 2 liter graduated cylinder of the free-fall circuit apparatus.
• the liquid is heated to 20 ° C ⁇ 1 ° C.
• To the circulating pumped water 0.2mL of the substance to be tested or formulation with 0.2mL of active substance are pipetted.
• the stopwatch is started at the same time.
• the resulting total volume (foam and liquid) is recorded at the corresponding temperature after 30 ", 1 ', 2', 3 ', 5', 10 ', 20', and 30 'and the target temperature of the Julabo F12-MB Thermostat after 1 minute at 32 ° C, after 10 minutes at 45 ° C and after 20 minutes at 55 ° C set.
• the results are given as "significantly better / better / same / worse than standard”.

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• 2006
  • 2006-09-05 EP EP06018611A patent/EP1897933A1/fr not_active Withdrawn
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