EP1105453B1 - Herstellung von entschäumergranulaten im dünnschichtverdampfer - Google Patents
Herstellung von entschäumergranulaten im dünnschichtverdampfer Download PDFInfo
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- EP1105453B1 EP1105453B1 EP99941535A EP99941535A EP1105453B1 EP 1105453 B1 EP1105453 B1 EP 1105453B1 EP 99941535 A EP99941535 A EP 99941535A EP 99941535 A EP99941535 A EP 99941535A EP 1105453 B1 EP1105453 B1 EP 1105453B1
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- Prior art keywords
- weight
- silicones
- sprayed
- defoamer
- aqueous
- 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.)
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Classifications
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- 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
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- 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
- C11D3/162—Organic compounds containing Si
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- 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
- C11D3/22—Carbohydrates or derivatives thereof
- C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
- C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
Definitions
- the present invention relates to a method for producing silicone-containing Defoamer granules for solid detergents, the silicones in the form of aqueous Emulsions are sprayed onto an admixed intermediate product made of carrier materials and if necessary, further defoaming using a thin film evaporator. Furthermore the present invention describes the use of such defoamer granules in solid detergents.
- Household and industrial laundry detergents generally contain organic surfactants, builders and numerous organic and inorganic additives.
- the for the surfactants used in the laundry tend to tend during the washing cycle
- Foam development which has a negative impact on the washing result. Therefore there is a practical need to control the development of foam during the washing process.
- Silicones as a rule, have proven to be particularly suitable defoamers applied to carrier materials and possibly with other organic defoaming agents acting substances can be used coated in solid detergents.
- DE-A1-31 28 631 discloses the production of foam -damped detergents containing silicone defoamers which are microencapsulated.
- the silicone is dispersed in an aqueous dispersion of a film-forming polymer and the dispersion - separated from the other detergent constituents dissolved or dispersed in water - is fed to the spray drying system via a special line.
- the two partial flows are combined in the area of the spray nozzle.
- suitable film-forming polymers are cellulose ethers, starch ethers or synthetic water-soluble polymers.
- Microcapsules form spontaneously in the spray nozzle.
- the process described is inevitably linked to the production of spray-dried detergents. A transfer to other detergents, for example those produced by granulation, does not appear to be possible with this procedure.
- Silicone-containing defoamers are known from European patent application EP-A1-0 496 510 , a mixture of silicones and fatty alcohols, fatty acids or glycerol monoesters with special melting points being applied to starch as the carrier material.
- EP-A1-0 496 510 a mixture of silicones and fatty alcohols, fatty acids or glycerol monoesters with special melting points being applied to starch as the carrier material.
- the silicones and the other organic constituents are mixed with the starch in liquid form or granulated in a fluidized bed process. Spraying the silicones and the organic materials onto the carrier during the granulation proves problematic according to this method. Because of their viscosity and their sticky, oily consistency, the silicones show problems with pumpability on the one hand, and stringing and sticking in the spray nozzle on the other, which means that the desired finely divided spraying is hardly possible.
- the object of the present invention was to provide a process for the preparation of effective To provide defoamer granules for solid detergents. Furthermore Should be accessible by the process defoamer granules that are free flowing and are non-dusting. Finally, the process should be designed so that the silicones work well are pumpable and can be sprayed on finely divided.
- the present invention relates to a method for producing Defoamer granules for solid detergents consisting of carrier materials, silicones and optionally water-insoluble wax-like defoamer substances, with silicones in Sprayed in the form of aqueous emulsions onto an admixed intermediate product from carrier materials and, if appropriate, water-insoluble wax-like defoamer substances with simultaneous Drying and granulating in a thin film evaporator.
- a horizontally arranged Thin film evaporator is ideally suited to dry, free-flowing and non-sticky To produce defoamer granules.
- the products are also dust-free, i.e. the The proportion of particles with a diameter of less than 200 ⁇ m is less than 5% by weight.
- suitable silicones are conventional organopolysiloxanes which have a content of finely divided silica, which in turn can also be silanated.
- organopolysiloxanes are described, for example, in the already cited European patent application EP-A1-0 496 510 .
- Polydiorganosiloxanes which are known from the prior art are particularly preferred.
- Suitable polydiorganosiloxanes have an almost linear chain and are identified by the following formula (I), where R can independently represent an alkyl or an aryl radical and n can stand for numbers in the range from 40 to 1500. Examples of suitable substituents R are methyl, ethyl, propyl, isobutyl, tert. Butyl and phenyl.
- the polydiorganosiloxanes contain finely divided silica, which can also be silanated can.
- Silica-containing are particularly suitable for the purposes of the present invention Dimethylpolysiloxanes.
- the polydiorganosiloxanes advantageously have a Brookfield viscosity at 25 ° C in the range from 5000 mPas to 30,000 mPas, in particular from 15,000 to 25,000 mPas.
- An essential criterion of the invention is that the silicones in Form of their aqueous emulsions are sprayed.
- the silicone is added submitted water with stirring. If desired, one can increase the viscosity the aqueous silicone emulsions so-called thickeners, as they are from the prior art Technology are known to admit.
- the thickeners can be inorganic and / or be organic in nature, particularly preferred are nonionic cellulose ethers such as Methyl cellulose, ethyl cellulose and mixed ethers such as methylhydoxyethyl cellulose, Methyl hydroxypropyl cellulose, methyl hydroxybutyl cellulose and anionic carboxy cellulose types like the carboxymethyl cellulose sodium salt (abbreviation CMC).
- CMC carboxymethyl cellulose sodium salt
- concentrations of about 0.5 to 10, in particular from 2.0 to 6,% by weight are calculated as a thickener mixture and based on aqueous silicone emulsion.
- the content of silicones of the type described in the aqueous emulsions is advantageously in the range from 5 to 50% by weight, in particular from 20 to 40% by weight as silicones and based on aqueous silicone emulsion.
- the aqueous silicone solutions are given as Thickener starch that is available from natural sources, such as rice, Potatoes, corn and wheat.
- the starch is advantageously in amounts from 0.1 to 50 % By weight, based on silicone emulsion, and in particular in a mixture with the already described thickener mixtures of sodium carboxymethyl cellulose and one nonionic cellulose ethers in the amounts already mentioned.
- the procedure is advantageously such that the pre-existing thickeners are allowed to swell in water before adding the Silicones are made.
- the silicones are expediently incorporated with the aid effective stirring and mixing devices.
- all known inorganic and / or organic carrier materials can be used as carrier materials.
- typical inorganic carrier materials alkali carbonates, aluminosilicates, water-soluble sheet silicates, alkali silicates, alkali sulfates, for example sodium sulfate and alkali phosphates.
- the alkali silicates are preferably a compound with a molar ratio of alkali oxide to SiO 2 of 1: 1.5 to 1: 3.5. The use of such silicates results in particularly good grain properties, in particular high abrasion stability and nevertheless high dissolution rate in water.
- the aluminosilicates referred to as carrier material include, in particular, the zeolites, for example zeolite NaA and NaX.
- the compounds referred to as water-soluble layered silicates include, for example, amorphous or crystalline water glass.
- organic carrier materials are film-forming polymers, for example Polyvinyl alcohols, polyvinyl pyrrolidones, poly (meth) acrylates, polycarboxylates, Cellulose derivatives and starch in question.
- Useful cellulose ethers are, in particular, alkali carboxymethyl cellulose, Methyl cellulose, ethyl cellulose, hydroxyethyl cellulose and so-called mixed cellulose ethers, such as, for example, methylhydroxyethyl cellulose and methylhydroxypropyl cellulose, as well as their mixtures.
- Particularly suitable mixtures are made from Sodium carboxymethyl cellulose and methyl cellulose composed, the carboxymethyl cellulose usually a degree of substitution of 0.5 to 0.8 carboxymethyl groups per anhydroglucose unit and the methyl cellulose a degree of substitution of 1.2 to 2 Has methyl groups per anhydroglucose unit.
- the mixtures preferably contain Alkalicarboxymethylcellulose and nonionic cellulose ether 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 in the usual way may have swollen.
- the carriers are particularly preferred native starch made up of amylose and amylopectin. Strength becomes a native strength denotes how it is accessible as an extract from natural sources, for example from Rice, potatoes, corn and wheat. Native starch is a commercially available product and therefore easily accessible.
- waxy in addition to the silicones, waxy, in Water-insoluble defoamer compounds are used.
- waxy understood such compounds that have a melting point at atmospheric pressure above 25 ° C. (Room temperature), preferably above 50 ° C and in particular above 70 ° C.
- the any wax-like defoamer substances contained according to the invention are in water practically insoluble, i.e. at 20 ° C they have a solubility of less than 0.1 in 100 g of water % By weight.
- Suitable waxy compounds are, for example Bisamides, fatty alcohols, fatty acids, carboxylic acid esters of mono- and polyhydric alcohols and paraffin waxes or mixtures thereof.
- Bisamides that are saturated are suitable Fatty acids with 12 to 22, preferably 14 to 18 carbon atoms and alkylene diamines with 2 to 7 carbon atoms.
- Suitable fatty acids are lauric, myristic, stearic, Arachinic acid and behenic acid as well as their mixtures as they are from natural fats respectively hardened oils such as tallow or hydrogenated palm oil are available.
- Suitable diamines are, for example, ethylenediamine, 1,3-propylenediamine, tetramethylenediamine, pentamethylenediamine, Hexamethylenediamine, p-phenylenediamine and toluenediamine.
- Preferred diamines are ethylenediamine and hexamethylenediamine.
- Bisamides are particularly preferred Bis-myristoyl-ethylenediamine, bis-palmitoyl-ethylenediamine, bis-stearoylethylenediamine and their mixtures and the corresponding derivatives of hexamethylenediamine.
- Suitable carboxylic acid esters are derived from carboxylic acids with 12 to 28 carbon atoms from. In particular, these are esters of behenic acid, stearic acid, oleic acid, palmitic acid, Myristic acid and / or lauric acid.
- the alcohol part of the carboxylic acid ester contains a mono- or polyhydric alcohol with 1 up to 28 carbon atoms in the hydrocarbon chain.
- suitable alcohols are behenyl alcohol, arachidyl alcohol, coconut alcohol, 12-hydroxystearyl alcohol, Oleyl alcohol and lauryl alcohol as well as ethylene glycol, glycerin, methanol, ethanol, Isopropanol, vinyl alcohol, sucrose, erythritol, pentaerythritol, sorbitan and / or sorbitol.
- esters are those of methanol, ethylene glycol, glycerin and sorbitan, the Acid part of the ester, in particular from behenic acid, stearic acid, oleic acid, palmitic acid or Myristic acid is selected.
- Suitable esters of polyhydric alcohols are, for example, xylitol monopalmitate, Pentarythritol monostearate, glycerol monostearate, ethylene glycol monostearate 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 like Carboxylic acids, with the monoesters or diesters being preferred.
- suitable natural esters are beeswax, which mainly consists of the esters CH 3 (CH 2 ) 24 COO (CH 2 ) 27 CH 3 and CH 3 (CH 2 ) 26 COO (CH 2 ) 25 CH 3 , and carnauba wax, which is a mixture of carnauba acid alkyl esters, often in combination with small proportions of free carnauba acid, other long-chain acids, high molecular weight alcohols and hydrocarbons.
- beeswax which mainly consists of the esters CH 3 (CH 2 ) 24 COO (CH 2 ) 27 CH 3 and CH 3 (CH 2 ) 26 COO (CH 2 ) 25 CH 3
- carnauba wax which is a mixture of carnauba acid alkyl esters, often in combination with small proportions of free carnauba acid, other long-chain acids, high molecular weight alcohols and hydrocarbons.
- Suitable carboxylic acids as a further defoamer compound are, in particular, behenic acid, Stearic acid, oleic acid, palmitic acid, myristic acid and lauric acid and mixtures thereof, as they are from natural fats or possibly hardened oils, such as tallow or hydrogenated Palm oil, are available.
- Saturated fatty acids with 12 to 22, in particular 14, are preferred up to 18 carbon atoms.
- Suitable fatty alcohols as a further defoamer compound are the hydrogenated products of described fatty acids.
- the paraffin wax preferred as a further defoamer compound in the sense of the invention 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 , described, and / or its freezing point. This is 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.
- paraffin waxes which can be used according to the invention, this liquid fraction is as low as possible and is preferably absent entirely.
- Particularly preferred paraffin wax mixtures at 30 ° C have a liquid content of less than 10% by weight, in particular from 2% by weight to 5% by weight, at 40 ° C a liquid content of less than 30% by weight, preferably 5 % By weight to 25% by weight and in particular from 5% by weight to 15% by weight, at 60 ° C. a liquid fraction of 30% by weight to 60% by weight, in particular 40% by weight % to 55% by weight, at 80 ° C a liquid content of 80% by weight to 100% by weight, and at 90 ° C a liquid content of 100% by weight.
- the temperature at which a liquid content of 100% by weight of the paraffin wax is reached is still below 85 ° C. in particularly preferred paraffin wax mixtures, in particular at 75 ° C. to 82 ° C.
- a preliminary product is first made from the carrier materials and the wax-like defoamer substances which may be present. If that The preliminary product also contains wax-like defoamer substances, the proportion by weight is on carrier materials, preferably 20 to 98% by weight, in particular 35 to 95 % By weight, and that of the waxy defoamer substances, preferably 2 to 80% by weight, in particular 5 to 65 wt .-% - calculated on the preliminary product.
- the intermediate product can be in the form of a solid or an aqueous solution or aqueous slurry can be used. It is preferred to use the precursor as an aqueous Use solution or as an aqueous slurry. If the preliminary product is still additionally contains wax-like defoamer substances, these can be in an aqueous Solution or slurry of the carrier material are dispersed.
- the dispersion can a water-soluble, non-surfactant dispersion stabilizer in the form of a water swellable polymers are added.
- cellulose ethers examples include the cellulose ethers mentioned, Homo- 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 acting as dispersion stabilizers in the aqueous slurry is preferably not more than 5% by weight, especially 1 wt .-% to 3 wt .-%, based on the resulting product.
- the preliminary product can also be used as a solid.
- the solid on the one hand previously described slurry of carrier materials and possibly other waxy ones Defoamer substances for drying in a spray tower or else simultaneous Drying and granulation in the fluidized bed using the SKET process, for example according to European patent EP-B-603 207 or according to the fluid bed method be subjected.
- the simultaneous drying and granulation of the defoamer granules is carried out in a preferably horizontally arranged thin-film evaporator with rotating internals, such as that sold by VRV under the name "Flashdryer". To put it simply, this is a tube that can be heated to different temperatures over several zones.
- the preliminary product is metered in via one or more shafts, which are provided with blades or shares of flies as rotating internals, sprayed with the aqueous silicone emulsion sprayed in via one or more nozzles and flung against the heated wall, on which the drying takes place in a thin layer of typically 1 to 10 mm thickness. If the preliminary products are used as slurry, they are metered in via a pump.
- the first two zones of the evaporator can be heated to 160 ° C and the last can be cooled to 20 ° C.
- the thin film evaporator is operated at atmospheric pressure and gassed in countercurrent with air (throughput 50 to 150 m 3 / h).
- the gas inlet temperature is usually 20 to 30 ° C, the outlet temperature 90 to 110 ° C.
- the throughput is of course dependent on the size of the dryer, but is typically 5 to 15 kg / h.
- aqueous slurry of the preliminary product slurry
- aqueous silicone emulsions it is particularly advantageous to temper the aqueous silicone emulsions to 45 to 65 ° C.
- the product streams of aqueous silicone emulsion and metered preliminary product are controlled in such a way that defoamer granules result, which are preferably 2.0 to 25% by weight, in particular 5.0 to 20% by weight, of silicone - calculated as silicone and based on Defoamer granules - included. The remaining 100% by weight of the defoamer granulate results from the preliminary product.
- the defoamer granules are dried considered, provided the free water content is below 10% by weight, preferably from 0.1 to 2 % By weight, based in each case on the finished granules, is.
- the defoamer granules produced by the process according to the invention are light flowing products that do not dust. They show a good defoaming effect and are Can be used in both spray-dried and granulated detergents.
- Another object of the present invention relates to the use of the invention Defoamer granules for the manufacture of solid detergents.
- the defoamer granules can be used in quantities of 0.2 to 7.0% by weight, preferably in quantities from 0.5 to 4.0% by weight, based on the detergent, may be present.
- the Detergent softeners such as tripolyphosphate or zeolite, and if necessary bleaches such as Perborate or percarbonate contained in the usual amounts.
- the defoamer granules can be mixed in easily.
- An aqueous slurry consisting of 0.5% by weight of cellulose ether, 5.0% by weight of sodium silicate, 20.7% by weight sodium sulfate, 15.8% by weight sodium carbonate, 2.0% polyacrylic / methacrylate, 50% by weight of water and 6% by weight of a paraffin wax mixture from 40% by weight paraffin with a solidification point of 62 ° C to 90 ° C, 30% by weight Hard paraffin with a solidification point of 42 ° C to 56 ° C and 30% by weight soft paraffin with a solidification point of 35 ° C to 40 ° C with constant homogenization manufactured.
- Example 2 preliminary product as a slurry
- An aqueous slurry consisting of 0.5% by weight cellulose ether, 2.0% by weight Sodium silicate, 13% by weight sodium sulfate, 23.5% by weight zeolite, 2.0% by weight polyacrylic / methacrylate, 50% by weight water, 7% by weight paraffin with a freezing point of 62 ° C to 90 ° C and 2 wt.% Bis-stearylethylenediamid with constant homogenization manufactured.
- the granules were produced in a flash dryer from VRV SpA, Milan / IT. It was a horizontally arranged thin-film evaporator (length 1100 mm, inside diameter: 155 mm) with 4 shafts and 22 blades, the distance to the wall of which was 2 mm.
- the dryer had three separate heating or cooling zones and a total heat exchanger area of 0.44 m 2 .
- the operation was carried out at normal pressure.
- the cooling zone 3 of 20 ° C had been set.
- the slurry was sprayed with a total of 2000 kg of the aqueous silicone emulsion according to Example 4.
- the speed of the rotors was 24 m / s.
- the flash dryer was gassed with air (approx. 110 m 3 / h); the gas outlet temperature was approx. 65 ° C.
- the pre-dried, still about 60 ° C hot granules were placed on a vibrating trough (length 1 m), gassed with room air and cooled to about 40 ° C within 30 s.
- Granules with the following composition were obtained: 7% by weight of silicone, 2.2% by weight Cellulose ether, 9.2% by weight sodium silicate, 38.0% by weight sodium sulfate, 29.1% by weight Sodium carbonate, 3.7% by weight polyacrylic / methacrylate and 11.0% by weight of one Paraffin wax mixture consisting of 40% paraffin with a solidification point of 62 ° C up to 90 ° C, 30% by weight hard paraffin with a solidification point of 42 ° C to 56 ° C and 30 % By weight soft paraffin with a solidification point of 35 ° C to 40 ° C. The product showed very good flowability and had no dust content.
- Example 7 the aqueous slurry of the preliminary product according to Example 2 with the sprayed aqueous silicone emulsion according to Example 5 and processed further.
- the product showed very good flow properties and had none Dust particles.
- Example 7 the preliminary product was used as tower powder according to Example 3 with the sprayed aqueous silicone emulsion according to Example 6 and processed. Over a A total of 10,000 kg of a preliminary product tempered at 50 ° C. with a Throughput of 11.5 kg / h conveyed into the thin film evaporator.
- Granules with the following composition were obtained: 10.2% by weight of silicone, 2.8% by weight Cellulose ether, 5.6% by weight sodium silicate, 33.3% by weight sodium sulfate, 35.1% by weight Sodium carbonate, 3.7% by weight of polyacrylic / methacrylate and 9.3% by weight of one Paraffin wax mixture consisting of 50% paraffin with a solidification point of 62 ° C up to 90 ° C, 25% by weight hard paraffin with a solidification point of 42 ° C to 56 ° C and 25 % By weight of soft paraffin with a solidification point of 35 ° C to 40 ° C with a Bulk density of 760 g / l and a grain size of 0.1 to 1.6 mm. The product showed good flowability and ⁇ 1% dust content.
- the defoamer granules produced were in an amount of 1.5 wt .-% by simple Mixing into a powdered universal detergent formulation with 8% by weight sodium alkylbenzenesulfonate, 10% by weight alkyl ethoxylate, 1.5% by weight soap, 10% by weight sodium carbonate, 20% by weight zeolite, 3% by weight sodium silicate, 20% by weight sodium perborate, 2 % By weight of tetraacetylethylenediamine (TAED), 0.5% by weight of protease, remainder on 100% by weight of sodium sulfate and water incorporated.
- the detergents obtained had no problems Foaming behavior at 30 ° C as well as at 40 ° C, 60 ° C and 95 ° C.
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Description
Claims (10)
- Verfahren zur Herstellung von Entschäumergranulaten für feste Waschmittel bestehend aus Trägermaterialien, Silikonen und ggf. in Wasser unlöslichen wachsartigen Entschäumersubstanzen, wobei man Silikone in Form wäßriger Emulsionen aufsprüht auf ein zugemischtes Vorprodukt aus Trägermaterialien und ggf. in Wasser unlöslichen wachsartigen Entschäumersubstanzen unter gleichzeitigem Trocknen und Granulieren in einem Dünnschichtverdampfer.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man Silikone in Form wäßriger Emulsionen kontinuierlich aufsprüht auf ein zugemischtes Vorprodukt aus Trägermaterialien und ggf. wachsartigen Entschäumersubstanzen unter gleichzeitigem Trocknen und Granulieren in einem horizontal angeordnetem Dünnschichtverdampfer mit rotierenden Einbauten, wobei man vorzugsweise an den Dünnschichtverdampfer vom Produkteingang bis zum Produktaustrag einen abnehmenden Temperaturgradienten anlegt, im Gegenstrom mit Luft begast und die Trocknung ausschließlich über die beheizte Wandung erfolgt.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man Polydisiloxane in Form ihrer wäßrigen Emulsionen aufsprüht.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß man die Silikone in Form wäßriger Emulsionen aufsprüht, die ein anorganisches oder organisches Verdickungsmittel, vorzugsweise eine Mischung von Natrium-Carboxymethylcellulose und einem nichtionischen Celluloseether, insbesondere in Mengen von 0,5 bis 10 Gew.-% - bezogen auf wäßrige Silikon-Emulsion - enthalten.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß man die Silikone in Form wäßriger Emulsionen aufsprüht, die eine Mischung aus Natrium-Carboxymethylcellulose, einem nichtionischen Celluloseether in einem Gewichtsverhältnis von 80 : 20 bis 40 : 60 in Mengen von 0,5 bis 10 Gew.-% sowie 0,1 bis 50 Gew.-% Stärke, vorzugsweise native Stärke, - bezogen auf wäßrige Silikon-Emulsion - enthalten.
- Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man die Silikone in Form wäßriger Emulsionen in Mengen von 5,5 bis 20,0 Gew.-% - berechnet als Silikon und bezogen auf Entschäumergranulat - aufsprüht.
- Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß man als Trägermaterial mindestens eine Verbindung ausgewählt aus der von Alkalicarbonate, Alkalisulfate, Alkaliphosphate, Zeolithe, Alkalisilikate, Cellulosether, Polycarboxylate und Stärke gebildeten Gruppe, einsetzt.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß man als wachsartige Entschäumersubstanzen mindestens eine Verbindung ausgewählt aus der von Bisamiden, Fettsäuren, Fettalkoholen, Carbonsäureester oder Paraffinwachse gebildeten Gruppe einsetzt.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß man ein Vorprodukt zumischt bestehend aus 20 bis 98 Gew.-% Trägermaterialien und 2 bis 80 Gew.-% wachsartigen Entschäumersubstanzen.
- Verwendung der nach Anspruch 1 hergestellten Entschäumergranulate zur Herstellung von festen Waschmitteln.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19837196A DE19837196A1 (de) | 1998-08-17 | 1998-08-17 | Herstellung von Entschäumergranulaten im Dünnschichtverdampfer |
DE19837196 | 1998-08-17 | ||
PCT/EP1999/005721 WO2000011126A1 (de) | 1998-08-17 | 1999-08-07 | Herstellung von entschäumergranulaten im dünnschichtverdampfer |
Publications (2)
Publication Number | Publication Date |
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EP1105453A1 EP1105453A1 (de) | 2001-06-13 |
EP1105453B1 true EP1105453B1 (de) | 2002-10-23 |
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Application Number | Title | Priority Date | Filing Date |
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EP99941535A Expired - Lifetime EP1105453B1 (de) | 1998-08-17 | 1999-08-07 | Herstellung von entschäumergranulaten im dünnschichtverdampfer |
Country Status (4)
Country | Link |
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EP (1) | EP1105453B1 (de) |
DE (2) | DE19837196A1 (de) |
ES (1) | ES2185393T3 (de) |
WO (1) | WO2000011126A1 (de) |
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DE60039559D1 (de) | 1999-08-13 | 2008-09-04 | Dow Corning Sa | Silikonhaltiges Schaumregulierungsmittel |
ATE286422T1 (de) | 1999-08-13 | 2005-01-15 | Dow Corning Sa | Schaumregulierungsmittel auf basis von silikon |
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Publication number | Priority date | Publication date | Assignee | Title |
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US5318718A (en) * | 1990-02-15 | 1994-06-07 | Henkel Kommanditgesellschaft Auf Aktien | Process for the production of a pourable phosphate-free foam-inhibiting preparation |
EP0771864A1 (de) * | 1995-11-03 | 1997-05-07 | The Procter & Gamble Company | Granularer Entschäumer |
-
1998
- 1998-08-17 DE DE19837196A patent/DE19837196A1/de not_active Withdrawn
-
1999
- 1999-08-07 DE DE59903195T patent/DE59903195D1/de not_active Expired - Lifetime
- 1999-08-07 WO PCT/EP1999/005721 patent/WO2000011126A1/de active IP Right Grant
- 1999-08-07 EP EP99941535A patent/EP1105453B1/de not_active Expired - Lifetime
- 1999-08-07 ES ES99941535T patent/ES2185393T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59903195D1 (de) | 2002-11-28 |
ES2185393T3 (es) | 2003-04-16 |
DE19837196A1 (de) | 2000-02-24 |
WO2000011126A1 (de) | 2000-03-02 |
EP1105453A1 (de) | 2001-06-13 |
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