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EP0670879A1 - Agent de regulation de la mousse a base d'alcools a longue chaine - Google Patents

Agent de regulation de la mousse a base d'alcools a longue chaine

Info

Publication number
EP0670879A1
EP0670879A1 EP94901846A EP94901846A EP0670879A1 EP 0670879 A1 EP0670879 A1 EP 0670879A1 EP 94901846 A EP94901846 A EP 94901846A EP 94901846 A EP94901846 A EP 94901846A EP 0670879 A1 EP0670879 A1 EP 0670879A1
Authority
EP
European Patent Office
Prior art keywords
weight
alkali
water
defoamer system
carboxylic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94901846A
Other languages
German (de)
English (en)
Inventor
Claus-Peter KURZENDÖRFER
Wolfgang Seiter
Hans-Josef Beaujean
Christian Block
Thomas Holderbaum
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0670879A1 publication Critical patent/EP0670879A1/fr
Withdrawn legal-status Critical Current

Links

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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2003—Alcohols; Phenols
    • C11D3/2006—Monohydric alcohols
    • C11D3/201—Monohydric alcohols linear
    • C11D3/2013—Monohydric alcohols linear fatty or with at least 8 carbon atoms in the alkyl chain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B01D19/04—Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • 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
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0034—Fixed on a solid conventional detergent ingredient
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0026—Low foaming or foam regulating compositions
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/12—Water-insoluble compounds
    • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/18—Hydrocarbons
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2079—Monocarboxylic acids-salts thereof
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2093—Esters; Carbonates
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/32—Amides; Substituted amides

Definitions

  • the invention relates to a defoamer system which contains hydrophobized silica and / or carboxylic acid bisa id and long-chain alcohols, a pourable and free-flowing foam regulating agent, in particular for use in detergents and cleaning agents, containing water-soluble or water-dispersible carrier material and adsorbed Ent ⁇ foamer system, and a method for producing such foam regulating agents.
  • German published patent application DT 2857 155 discloses detergents with a foam regulating agent which contains hydrophobic silicon dioxide and a mixture of solid and liquid hydrocarbons, optionally in a mixture with fatty acid esters. Due to the high content of hydrocarbon which is liquid at room temperature, from 22.5% by weight to about 98% by weight, there is a risk of clumping in the case of such foam regulating agents.
  • Foam regulating agents containing paraffin wax mixtures and hydrophobized silica, optionally in combination with branched-chain alcohols, are known from German Offenlegungsschrift DE 3400003.
  • Powdered defoamers which contain a liquid mixture of higher molecular weight, branched-chain alcohols with hydrophobized silica in combination with a water-insoluble wax on a water-soluble, powdery carrier, are known from German published patent application DE 31 15644.
  • European patent application EP 309931 foam regulating agents were described which contain a relatively complex mixture of paraffin wax and microcrystalline paraffin wax.
  • agents of this type in some cases have a defoamer performance which is found to be inadequate and cannot always be incorporated satisfactorily in a stable manner in powdered washing or cleaning agents.
  • the object was accordingly to provide a defoamer system which can be packaged in the form of a free-flowing, silicone-free foam control agent and which, when used in detergents and cleaning agents, is effective over a wide temperature range, that is to say in the cold wash range, at medium wash temperatures and Interfering foam development is also suppressed in the hot wash area. Furthermore, both the defoamer system and the foam regulating agent containing it should be stable in storage and effective in a mixture with conventional detergent components remain and have no adverse effects on the material to be treated and the environment.
  • the invention accordingly relates to a defoamer system suitable for use in detergents and cleaning agents containing surfactants, comprising hydrophobized silica and / or a bisamide derived from diamines and carboxylic acids, which is characterized in that it
  • (e) contains up to 79.9% by weight, in particular 1% by weight to 75% by weight, of a paraffin wax or paraffin wax mixture with a solidification point not below 25 ° C.
  • the defoamer system contains 3% by weight to 25% by weight, in particular 5% by weight to 18% by weight of bisamide (component a), 22% by weight to 90% by weight, in particular 25% by weight to 50% by weight of alcohol (b), up to 60% by weight, in particular 10% by weight to 40% by weight of carboxylic acid ester (c), up to 40% by weight , in particular 10% by weight to 20% by weight of carboxylic acid (d) and up to 60% by weight, in particular 10% by weight to 50% by weight of paraffin wax (e).
  • the defoamer system contains 2% by weight to 22% by weight bisamide (a), 28% by weight to 65% by weight, in particular 32% by weight to 50% by weight of carboxylic acid ester (c) and 13% by weight to 54% by weight of carboxylic acid (d).
  • a further preferred embodiment relates to a defoamer system containing 0.2% by weight to 10% by weight, in particular 0.5% by weight to 5% by weight of hydrophobicized silica (component a), 22% by weight to 90 wt .-%, in particular 25 wt .-% to 50 wt .-% alcohol (b), up to 60 wt .-%, in particular 10 wt .-% to 40 wt .-% carboxylic acid ester (c ), up to 40% by weight, in particular 10% by weight to 20% by weight of carboxylic acid (d) and up to 60% by weight, in particular 10% by weight to 50% by weight of paraffin wax (e).
  • component a hydrophobicized silica
  • component b 22% by weight to 90 wt .-%, in particular 25 wt .-% to 50 wt .-% alcohol
  • b up to 60 wt .-%, in particular 10 wt .-% to 40 w
  • Another object of the invention is a granular, free-flowing foam control means 1, which
  • (II) contains 70% by weight to 99.5% by weight of a granular, phosphate-free and water-soluble or water-dispersible carrier material.
  • composition according to the invention is preferably 1% by weight to 25% by weight, in particular 5% by weight to 15% by weight of defoamer system (I) and 75% by weight to 99% by weight, in particular 85 % By weight to 95% by weight of carrier material (II) ent.
  • Component (a) of the defoamer system consists of hydrophobized silica, bisamides or their mixtures.
  • Bisamides are suitable which are derived from saturated fatty acids with 12 to 22, preferably 14 to 18, carbon atoms and from alkylenediamines with 2 to 7 carbon atoms.
  • Suitable fatty acids are lauric acid, myristic acid, stearic acid, arachic acid and behenic acid and mixtures thereof, such as are obtainable from natural fats or hardened oils, such as tallow or hydrogenated palm oil.
  • Suitable diamines are, for example, ethylene diamine in 1,3-propylene diamine, tetra ethylene diamine, penta ethylene diamine, hexamethylene diamine, p-phenylene diamine and tolylene diamine.
  • Preferred diamines are ethylenediamine and hexamethylene diamine.
  • Particularly preferred bisamides are bis-myristoyl-ethylenediamine, Bis-palmitoyl-ethylenediamine, bis-stearoylethylenediamine and their mixtures and the corresponding derivatives of hexamethylenediamine.
  • the bisamides are preferably in finely divided form and in particular have an average grain size of less than 50 ⁇ m.
  • the maximum particle size of the particles is preferably below 20 ⁇ m, with at least 50%, in particular at least 75%, of the particles being smaller than 10 ⁇ m.
  • Hydrophobicized silica is generally understood to mean the treatment of finely divided silicas obtained by precipitation from silicate solutions or pyrogenic decomposition of silicon halides with organohalosilanes, as described, for example, in US Pat. Nos. US 3207 698 or 3388073. Hydrophobicized silicas can also be obtained by fixing organopolysiloxanes, for example polydiethylsiloxane, to finely divided silicon dioxide, as is known, for example, from US Pat. No. 3,235,509. Another example is fumed silicon dioxide reacted with dimethyldichlorosilane or trimethylchlorosilane.
  • the hydrophobized silica particles normally have average primary particle sizes of 5 ⁇ m to 50 ⁇ m with specific surfaces of 100 m 2 / g to 300 m 2 / g.
  • the amounts of silane or siloxane required for the hydrophobicization of the silica are extremely small, they are normally not more than about 5% by weight of the amount of silica.
  • the organosilicon components introduced in this way are the smallest quantities.
  • free organopolysiloxanes that are not bound to silica can be dispensed with; Such compounds are therefore preferably not contained in the systems according to the invention.
  • Component (b) of the defoamer system according to the invention is composed of linear or branched, primary, secondary or tertiary, saturated or mono- or polyunsaturated alcohols with 12 to 24 C- Atoms, preferably 14 to 20 carbon atoms together.
  • the reduction products of fatty acids, so-called fatty alcohols are particularly suitable, although their branched-chain isomers, so-called oxo alcohols, can also be used.
  • the primary alcohols with linear alkyl radicals in particular dodecyl, tetradecyl, hexadecyl, octa-decyl or dodecyl radicals, and mixtures thereof, are preferred.
  • part of the alcohol component (b), preferably below 50 parts by weight and in particular 10% by weight to 35% by weight of component b, consists of mono- or polyunsaturated fatty alcohol which include, for example, oleyl alcohol, elaidyl alcohol, linoleyl alcohol, linolenyl alcohol, gadoleyl alcohol and erucalcohol.
  • the carboxylic acid ester component (c) of the defoamer system according to the invention can be of natural or synthetic origin.
  • the carboxylic acid part of the ester contains 12 to 28 carbon atoms.
  • these are esters of behenic acid, stearic acid, oleic acid, palmitic acid, myristic acid and / or lauric acid.
  • esters suitable according to the invention are beeswax, which mainly consists of the esters CH3 (CH2) 24C00 (CH2) 27CH3 and CH3 (CH2) 26C00 (CH2) 2 ⁇ CH3, and carnauba waxes, which is a mixture of alkyl carnauba acid, often in Combination with small amounts of free carnauba acid, other long-chain acids, high-molecular alcohols and hydrocarbons.
  • the alcohol part of the carboxylic acid ester contains a mono- or polyhydric alcohol with 1 to 28 carbon atoms in the hydrocarbon chain.
  • suitable alcohols are behenyl alcohol, arachidyl alcohol, coconut alcohol, oleyl alcohol and lauryl alcohol, and also ethylene glycol, glycerol, methanol, ethanol, isopropanol, vinyl alcohol, sucrose, erythritol, pentaerythritol, sorbitan and / or sorbitol.
  • esters are those of methanol, ethylene glycol, glycerol and sorbitan, the acid part of the ester being selected in particular from behenic acid, stearic acid, oleic acid, palmitic acid or myristic acid.
  • Suitable esters of polyhydric alcohols are, for example, xylitol monopalmitate, pentarythritol monostearate, glycerol monostearate, ethylene glycol onostearate and sorbitan monostearate, sorbitan palmitate, sorbitan monolaurate, Sorbitan dilaurate, sorbitan distearate, sorbitan dibehenate, sorbitan dioleate and mixed tallow alkyl sorbitan mono- and diesters.
  • Usable glycerol esters are the mono-, di- or triesters of glycerol and the carboxylic acids mentioned, the mono- or diesters being preferred.
  • Glycerol monostearate, glycerol monooleate, glycerol monopalmitate, glycerol monoebehenate and glycerol distearate are examples of this.
  • the carboxylic acid (component d) optionally contained in the defoamer system contains 12 to 28 carbon atoms. Particularly suitable are behenic acid, stearic acid, oleic acid, palmitic acid, myristic acid and lauric acid, and mixtures thereof, such as are obtainable from natural fats or, if appropriate, hardened oils, such as tallow or hydrogenated palm oil. Saturated fatty acids with 12 to 22, in particular 14 to 18, carbon atoms are preferred.
  • the paraffin wax (component e) which may be present in the defoamer system generally represents a complex mixture of substances without a sharp melting point.
  • its melting range is usually determined by differential thermal analysis (DTA), as in "The Analyst” 87 (1962), 420, and / or its freezing point. This means the temperature at which the paraffin changes from the liquid to the solid state by slow cooling.
  • Paraffins which are completely liquid at room temperature, that is to say those having a solidification point below 25 ° C. cannot be used according to the invention.
  • the paraffin wax mixtures known from EP 309931 of, for example, 26% by weight to 49% by weight of microcrystalline paraffin with a solidification point of 62 ° C.
  • paraffin waxes which can be used according to the invention, this liquid fraction is as low as possible and is preferably completely absent. Particularly preferred paraffin wax mixtures at 30 ° C.
  • the temperature at which a liquid content of 100% by weight of the paraffin wax is reached is still below 85 ° C., in particular at 75 ° C. to 82 ° C., in particularly preferred paraffin wax mixtures.
  • the phosphate-free carrier material (II) for assembling the defoamer system according to the invention into a free-flowing foam control agent suitable for use in powder detergents and cleaning agents has a granular structure and consists of water-soluble or water-dispersible compounds, primarily inorganic and / or organic salts which are suitable for use in detergents and cleaning agents.
  • customary washing alkalis for example alkali carbonates, builder substances, for example aluminosilicates, layered silicates, for example bentonites, and inorganic bleaching agents based on oxygen, for example alkali perborates or percarbonates, in particular the latter bleaching agents in one embodiment of the agent according to the invention as carrier material (II) or part of the carrier material (II) are preferred.
  • the carrier material (II) preferably contains both alkali carbonate and alkali silicate.
  • the carrier material preferably contains 1% by weight to 50% by weight of alkali carbonate, up to 70% by weight of alkali sulfate, up to 50% by weight of alkali alumosilicate and 10% by weight to 50% by weight of alkali silicate , however, can additionally contain other water-soluble or water-insoluble, water-dispersible substances.
  • the materials which can additionally be used include, in particular, alkali metal chlorides and layered silicates, for example bentonite.
  • the alkali silicate is preferably a compound with a molar ratio of alkali oxide to SiO 2 of 1: 1.5 to 1: 3.5.
  • silicates results in particularly good grain properties, in particular high abrasion stability and nevertheless high dissolution rate in water.
  • the carrier material for the foam regulating agents which can be used according to the invention include, in particular, the zeolites, for example zeolite NaA and NaX.
  • suitable organic carrier materials or components of the carrier material (II) are the acetates, tartrates, citrates, succinates, carboxymethyl succinates and the alkali metal salts of aminopolycarboxylic acids, such as NTA or EDTA, hydroxyalkane phosphonates and aminoalkane polyphosphonates, such as l -Hydroxyethane-l, l-diphosphonate, ethylenediaminotetra-methylene phosphonate and diethylenetriaminepentamethylenephosphonate.
  • Water-soluble salts of polymeric or copolymeric carboxylic acids for example polyacrylates and copolymers of acrylic acid and maleic acid, can also be used.
  • inorganic and organic salts can often be used with advantage.
  • additional organic carrier materials are preferably not contained in the carrier salt mixture in excess of 20% by weight, in particular in amounts of 2% by weight to 15% by weight, based in each case on the total carrier material (II).
  • the preferred alkali metal in the alkali metal salts mentioned is sodium in all cases.
  • the carrier material (II) can also contain film-forming polymers, for example polyethylene glycols, polyvinyl alcohols, polyvinylpyrrolidones, polyacrylates and cellulose derivatives.
  • Usable cellulose ethers are, in particular, alkali carboxymethyl cellulose, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose and so-called cellulose mixed ethers, such as, for example, methyl hydroxyethyl cellulose and methyl hydroxypropyl cellulose, and mixtures thereof.
  • the carboxymethyl cellulose usually having a degree of substitution of 0.5 to 0.8 carboxymethyl groups per anhydroglucose unit and the methyl cellulose having a degree of substitution of 1.2 to 2 methyl groups per anhydroglucose unit.
  • the mixtures preferably contain alkali carboxymethyl cellulose and nonionic cellulose ethers in weight ratios from 80:20 to 40:60, in particular from 75:25 to 50:50.
  • Such cellulose ether mixtures can be used in solid form or as aqueous solutions, which can be pre-swollen in the usual way.
  • the foam regulating agents according to the invention contain no more than 10% by weight, preferably less than 5% by weight, in particular 0.5% by weight. up to 3.5% by weight of surfactant and are particularly preferably free of surfactants.
  • Surfactants are to be understood as meaning surface-active compounds with a hydrophobic part of the molecule and hydrophilic anionic, pholytic, zwitterionic, cationic and nonionic groups which have a cleaning or emulsifying effect in aqueous solution or dispersion.
  • the hydrophobic part of the molecule generally consists of a hydrocarbon residue or a substituted hydrocarbon residue or a polyglycol ether residue which is poorly soluble in water, for example a polypropylene glycol or polybutylene glycol ether residue.
  • the foam regulating agent according to the invention contains 2% by weight to 5% by weight of alkali carbonate, in particular sodium carbonate, up to 30% by weight of alkali silicate, in particular sodium silicate, 10% by weight to 75% by weight of alkali metal sulfate , in particular sodium sulfate, up to 35% by weight, in particular 10% by weight to 30% by weight of zeolite, up to 5% by weight, in particular 1% by weight to 3% by weight of water-soluble or in what ⁇ this swellable polymer, in particular cellulose ether, and up to 17% by weight, in particular 5% by weight to 15% by weight of water and 1% by weight to 25% by weight of defoamer system according to the invention.
  • a further preferred embodiment of the foam regulating agent according to the invention contains 25% by weight to 45% by weight of alkali carbonate, 5% by weight to 20% by weight of alkali silicate, up to 50% by weight, in particular 15% by weight to 45% by weight, zeolite and / or alkali sulfate, up to 3% by weight, in particular 0.5% by weight to 2% by weight, water-soluble or water-swellable polymer and up to 20% by weight %, in particular 3% by weight to 18% by weight, water and 5% by weight to 15% by weight of defoamer system according to the invention.
  • this contains 70% by weight to 95% by weight of alkali perborate, which can be present as a tetra or monohydrate, alkali percarbonate, and / or alkali persilicate.
  • a foam regulating agent according to the invention can be produced by applying the molten defoamer system (I) to the granular carrier material (II), for example by successive admixing, in particular as a spray, to the carrier grain.
  • Both the separate application of the individual components (a) to optionally (d) of the defoamer system (I) is possible as well as the application of the finished defoamer system previously produced by mixing, preferably at elevated temperature, the aforementioned components.
  • the carrier grain which can be produced in the customary manner by spray drying an aqueous slurry of the carrier salts, is kept in motion by mixing elements or by fluidization in order to ensure a uniform loading of the carrier material.
  • the mixers or fluidized bed dryers used for this can be operated continuously or discontinuously.
  • One embodiment for producing the foam control agent according to the invention consists in spinning the granular carrier material in a continuous stream through the likewise continuously generated spray zone of the at least partially melted defoamer system, residence times of the carrier material in the hot spray zone being usually less than 1 second can. Furthermore, it is possible immediately afterwards to cool the particles of the foam regulating agent with the aid of a gas stream, so that the thermal load on the material can be kept extremely low.
  • a wheel-shaped mixing device is described in this document as a device for carrying out the method, in which two individually designed and driven wheel-shaped disks are superimposed.
  • the solid powder is fed to one disk and the liquid underneath is charged with the liquid component.
  • Both disks run at high rotation speeds, which range from a few 100 to a few 1000 revolutions per minute can lie.
  • the respective pressurized writing surfaces and in particular the edge of the disk carrying the liquid are designed such that on the one hand the spray zone is thrown off and continuously reproduced from the edge of the wheel running at high speed of rotation, and on the other hand this is continuous with the other wheel-shaped element ⁇ granular material supplied is thrown through this spray zone of the liquid phase. Due to the high working speed, there is a very short contact between the two material phases and thus only a very short time contact of the solid particles with the warm or hot spray phase.
  • the method can be carried out particularly well with the device described in EP 48312, but it is not restricted to devices of this type. It is important in the case of thermally sensitive carrier material to set a relatively short contact time, which is achieved by the solid material being thrown through a continuously generated spray zone, the solid material optionally being able to be cooled in front of and / or behind the spray zone.
  • the foam regulating agent is prepared in such a way that the carrier material (II) is dissolved or slurried in water, the defoamer system (I) or the constituents (a) to, if appropriate, (e) of the defoamer system (I) dispersed therein and then spray-dried this slurry.
  • a water-soluble, non-surfactant dispersion stabilizer in the form of a water-swellable polymer is preferably added to the dispersion, since the components of the defoamer system are generally not sufficiently soluble in the aqueous slurry.
  • Examples include the cellulose ethers mentioned, homopolymers and copolymers of unsaturated carboxylic acids, such as acrylic acid, maleic acid and copolymerizable vinyl compounds, such as vinyl ether, acrylamide and ethylene.
  • the addition of such compounds which act as dispersion stabilizers in the aqueous slurry is preferably not more than 5% by weight, in particular 1% by weight to 3% by weight, based on the foam control agent formed.
  • the water content of the slurry can be 30% by weight to 60% by weight.
  • the spray drying of the dispersion can be carried out in a manner known in principle in a manner seen systems, so-called spray towers, by means of hot drying gases conducted in cocurrent or countercurrent.
  • drying by drying gases carried in cocurrent with the spray material is preferred, since the activity loss attributable to the potential hot air volatility of some components of the defoamer system can be reduced to a minimum, particularly in the case of paraffin-containing agents.
  • a foam regulating agent according to the invention preferably consists of particles with particle sizes not more than 2 mm, in particular from 0.1 m to 1.6 mm. It preferably has a bulk density in the range from 300 grams per liter to 1100 grams per liter, in particular from 450 grams per liter to 900 grams per liter. It is preferably used for the production of powdered detergents or cleaning agents, a further advantage of the foam regulating agents according to the invention being their low use with good defoamer performance. It is possible to achieve the defoamer performance of conventional silicone defoamers both in low-temperature washing at 30 ° C. to 60 ° C. and in high-temperature washing at about 90 ° C. using the same amounts, based on active substance, of the foam regulating agents according to the invention Achieve bisamide / carbonic acid ester base.
  • the foam regulating agents listed were each added in a quantity of 1.5% by weight by simply mixing them with the other constituents (spray-dried powder product, heat-resistant ingredients subsequently added) into a powdered universal detergent formulation (other constituents 8% by weight) Na alkylbenzenesulfonate, 3.5% by weight fatty alkyl polyethoxylate, 1.5% by weight soap, 10% by weight Na carbonate, 20% by weight zeolite, 3% by weight Na silicate, 20% by weight. % Na perborate, 2% by weight TAED, 0.5% protease, remainder to 100% by weight Na sulfate and water).
  • the detergents obtained had perfect foaming behavior when machine washed both at 30 ° C. and at 40 ° C., 60 ° C. and 95 ° C.

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  • Detergent Compositions (AREA)

Abstract

Pour les systèmes antimousse adaptés aux produits de lavage et de nettoyage à base de tensio-actifs et contenant de l'acide silicique hydrofugé et/ou un diamide dérivé de diamines et d'acides carboxyliques, on se proposait d'améliorer les possibilités de réaliser un agent de régulation de la mousse coulant et sans silicones et d'améliorer également l'efficacité de ce produit dans une plage de températures étendue en faisant en sorte que le système anti-mousse comme l'agent de régulation de la mousse contenant ce système, mélangés aux composants courants des produits de lavage, restent stables à l'entreposage et conservent leur action, et qu'ils n'exercent pas d'effet défavorable sur le produit à traiter ou l'environnement. Cet objectif a été atteint essentiellement par la mise à disposition d'un mélange antimousse contenant 0,1 à 30% en poids d'acide silicique hydrofugé et/ou au moins un bisamide dérivé d'une diamine C2-7 et d'un acide carboxylique saturé C12-22, 20 à 99,9% en poids d'au moins un alcool avec 12 à 24 atomes de C, jusqu'à 79,9% en poids d'au moins un ester d'un acide carboxylique C12-22 et d'un alcool C1-40, jusqu'à 79,9% en poids d'au moins un acide carboxylique C12-28 et jusqu'à 79,9% en poids d'une cire de paraffine ou d'un mélange de cires de paraffine avec un point de solidification qui ne soit pas inférieur à 25 °C.
EP94901846A 1992-11-30 1993-11-22 Agent de regulation de la mousse a base d'alcools a longue chaine Withdrawn EP0670879A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19924240165 DE4240165A1 (de) 1992-11-30 1992-11-30 Schaumregulierungsmittel auf Basis langkettiger Alkohole
DE4240165 1992-11-30
PCT/EP1993/003275 WO1994012603A1 (fr) 1992-11-30 1993-11-22 Agent de regulation de la mousse a base d'alcools a longue chaine

Publications (1)

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EP0670879A1 true EP0670879A1 (fr) 1995-09-13

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EP94901846A Withdrawn EP0670879A1 (fr) 1992-11-30 1993-11-22 Agent de regulation de la mousse a base d'alcools a longue chaine

Country Status (3)

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EP (1) EP0670879A1 (fr)
DE (1) DE4240165A1 (fr)
WO (1) WO1994012603A1 (fr)

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Publication number Priority date Publication date Assignee Title
AU7648000A (en) * 1999-08-31 2001-03-26 Henkel Kommanditgesellschaft Auf Aktien Detergent constituent
DE102010048948A1 (de) 2010-10-19 2011-12-29 Clariant International Ltd. Lagerstabile, wasserbasierende Entschäumeremulsionen
DE102018107576B4 (de) 2018-03-29 2021-05-27 Uwe Valder Bandagesystem mit Entstauungsfunktion

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US4032473A (en) * 1975-06-04 1977-06-28 Associated Chemists, Inc. Water-based defoamer compositions
CA1143244A (fr) * 1979-10-22 1983-03-22 Robert E. Gansser Composition de repression des ecumes
DE3115644A1 (de) * 1981-04-18 1982-11-04 Henkel KGaA, 4000 Düsseldorf "pulverfoermiger entschaeumer fuer waessrige systeme, verfahren zu seiner herstellung und seine verwendung"
US4477370A (en) * 1983-04-15 1984-10-16 Drew Chemical Corporation Defoaming composition
DE3732947A1 (de) * 1987-09-30 1989-04-13 Henkel Kgaa Zur verwendung in wasch- und reinigungsmitteln geeignetes schaumregulierungsmittel
DE3810426A1 (de) * 1988-03-26 1989-10-12 Bayer Ag Schaumdaempfungsmittel

Non-Patent Citations (1)

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Title
See references of WO9412603A1 *

Also Published As

Publication number Publication date
WO1994012603A1 (fr) 1994-06-09
DE4240165A1 (de) 1994-06-01

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