WO1999000476A1 - Umhüllte reinigungsmittelkomponente - Google Patents
Umhüllte reinigungsmittelkomponente Download PDFInfo
- Publication number
- WO1999000476A1 WO1999000476A1 PCT/EP1998/003654 EP9803654W WO9900476A1 WO 1999000476 A1 WO1999000476 A1 WO 1999000476A1 EP 9803654 W EP9803654 W EP 9803654W WO 9900476 A1 WO9900476 A1 WO 9900476A1
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- WIPO (PCT)
- Prior art keywords
- solid particles
- coating
- coated
- temperature
- detergents
- Prior art date
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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
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3907—Organic compounds
- C11D3/3917—Nitrogen-containing compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/04—Making microcapsules or microballoons by physical processes, e.g. drying, spraying
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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
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
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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
- C11D3/38—Products with no well-defined composition, e.g. natural products
- C11D3/386—Preparations containing enzymes, e.g. protease or amylase
- C11D3/38672—Granulated or coated enzymes
Definitions
- the invention relates to a method for producing a coated detergent component, the cover consisting of a non-water-soluble substance which has a plastic solidification area.
- the invention further relates to such coated detergent components and their use in detergents, in particular in detergents, detergents for hard surfaces, automatic dishwashing detergents or hand dishwashing detergents.
- the cleaning agent While the large number of components present in the cleaning agent generally has good cleaning power at different temperatures and guarantees a wide variety of soiling, but there are often compatibility problems between individual components. For example, the activity of enzymes, which are contained in the cleaning agent to remove protein-containing soiling, for example, is reduced by bleaching agent activated at the same time. Therefore, more enzymes must either be added to the cleaning agent in order to obtain a high cleaning power, or the cleaning agent has a poorer cleaning effect than would have been expected based on the amount of the enzyme used.
- bleaching agents such as percarbonates can be broken down by moisture, thermal influences and interactions with other components of the substance mixture present in the cleaning agent, which leads to a loss in bleaching action.
- the cleaning agent contains a bleaching agent (which is generally the case for at least some detergents and in particular for machine dishwashing agents), there is usually also a so-called bleach activator, which causes the bleaching agent (the active oxygen) to be released even at low temperatures. If the bleaching agent and activator are present side by side in the cleaning agent, decomposition of the bleaching agent can already occur during storage under the influence of moisture, which in turn leads to a loss of bleaching activity for the cleaning agent.
- a bleaching agent which is generally the case for at least some detergents and in particular for machine dishwashing agents
- bleach activator which causes the bleaching agent (the active oxygen) to be released even at low temperatures. If the bleaching agent and activator are present side by side in the cleaning agent, decomposition of the bleaching agent can already occur during storage under the influence of moisture, which in turn leads to a loss of bleaching activity for the cleaning agent.
- the cleaning agent is a liquid-formulated cleaning agent which generally contains at least small amounts of water. This is where the effects of the water content of the liquid, which can be observed with powdered cleaning agents or with granulated cleaning agents, essentially caused by atmospheric moisture, occur formulated detergent to an increased extent. Such interactions are usually not desirable.
- Detergent components develop their activity at the same time, which can lead to a mutual reduction in effectiveness and, in the worst case, to a complete blockage of the mechanism of action of individual components
- a preparation form for a cleaning agent is ideal, which retains certain substances (e.g. aggressive substances or sensitive substances) for a certain time in a form that is indifferent to the detergent components that have already been dissolved and which only releases the substances at a later point in time, for example when the cleaning function of the components already dissolved has ended.
- the release should then proceed quickly and quantitatively in order to use the highest possible proportion of the active ingredient, preferably the entire active ingredient.
- a suitable parameter for triggering this release is, for example, the temperature of the cleaning liquor.
- EP-A 0 131 269 relates to granules containing metal chelate complexes and processes for their preparation.
- a process for the coating of metal chelate complexes of ethylenediaminetetraacetic acid (H 4 EDTA) is described, in which the pulverized metal chelate complexes are mixed with the melt of the coating and homogenized.
- the liquid dispersion is then further processed in a pastilling plant or in a scaling plant to form relatively large pastilles or flakes.
- Processing of the molten mixture of binder and metal chelate complex in extrusion and hole presses or in extruders is also mentioned.
- the products available in this way are described in that they dissolve more slowly in water than the pure metal chelate complexes. There is talk of a delay effect, the influence of the ambient temperature is not mentioned in the document.
- US Pat. No. 5,258,132 describes particles which are provided with a single-layer coating of paraffin wax with a melting point of about 40 to 50 ° C.
- the coated particles are produced by spray coating, in which a fluidized bed with solid particles is treated with the melted paraffin wax either from above or from below.
- the coating of the solid particles which on the one hand relate to the melting or solidification behavior, but on the other hand also relate to the material properties of the coating in the solidified area at ambient temperature.
- the casing Since the casing is intended to permanently protect the solid particles enclosed therein against environmental influences during transport or storage, it must have a high stability against, for example, shock loads occurring during transport or transfer operations, in particular collisions with other particles or vessel walls.
- the covering should therefore either have at least partially elastic or at least plastic properties, in order to react to an occurring shock load due to elastic or plastic deformation and not to break.
- the coating should have a melting range (solidification range) in such a temperature range in which the solid particles to be coated are not exposed to excessive thermal stress. On the other hand, however, the melting range must be sufficiently high to still provide effective protection for the enclosed particles at at least a slightly elevated temperature.
- the sheathing does not show a sharply defined melting point, as is usually the case with pure, crystalline substances, but rather a melting range that may include several degrees Celsius having.
- the covering preferably has a melting range which is between approximately 45 ° C. and approximately 75 ° C., particularly preferably between approximately 50 ° C. and approximately 60 ° C. In the present case, this means that the melting range occurs within the specified temperature interval and does not indicate the width of the melting range.
- the width of the melting range is preferably at least 1 ° C., preferably about 2 to about 3 ° C.
- waxes are understood to mean a number of natural or artificially obtained substances which generally melt above 40 ° C. without decomposition and which are relatively low-viscosity and not stringy even a little above the melting point. They have a strongly temperature-dependent consistency and solubility.
- the waxes are divided into three groups according to their origin, natural waxes, chemically modified waxes and synthetic waxes.
- Natural waxes include, for example, vegetable waxes such as candelilla wax, carnauba wax, japan wax, esparto grass wax, cork wax, guaruma wax, rice germ oil wax, sugar cane wax, ouricury wax, or montan wax, animal waxes such as beeswax, shellac wax, walnut, lanolin (wool wax), or furs, mineral wax such as ceresin or ozokerite (earth wax), or petrochemical waxes such as petrolatum, paraffin waxes or micro waxes.
- vegetable waxes such as candelilla wax, carnauba wax, japan wax, esparto grass wax, cork wax, guaruma wax, rice germ oil wax, sugar cane wax, ouricury wax, or montan wax
- animal waxes such as beeswax, shellac wax, walnut, lanolin (wool wax), or furs
- mineral wax such as ceresin or ozoke
- the chemically modified waxes include hard waxes such as montan ester waxes, Sassol waxes or hydrogenated jojoba waxes.
- Synthetic waxes are generally understood to mean polyalkylene waxes or polyalkylene glycol waxes. Can also be used as wrapping materials Compounds from other classes of substances that meet the stated softening point requirements. Higher esters of phthalic acid, in particular dicyclohexyl phthalate, which is commercially available under the name Unimolf 66 (Bayer AG), have proven to be suitable synthetic compounds, for example. Also suitable are synthetically produced waxes from lower carboxylic acids and fatty alcohols, for example dimyristyl tartrate, which is available under the name Cosmacof ETLP (Condea). Conversely, synthetic or partially synthetic esters from lower alcohols with fatty acids from native sources can also be used.
- Tegin 9 90 (Goldschmidt), a glycerol monostearate palmitate, falls into this class of substances.
- Shellac for example Shellac-KPS-Dreiring-SP (Kalkhoff GmbH), can also be used according to the invention as a coating material.
- wax alcohols are also included in the waxes in the context of the present invention, for example.
- Wax alcohols are higher molecular weight, water-insoluble fatty alcohols with usually about 22 to 40 carbon atoms.
- the wax alcohols occur, for example, in the form of wax esters of higher molecular fatty acids (wax acids) as the main component of many natural waxes.
- wax alcohols are lignoceryl alcohol (1-tetracosanol), cetyl alcohol, myristyl alcohol or melissyl alcohol.
- the coating of the present invention the solid particles coated can optionally also contain wool wax alcohols which are understood to be triterpenoid and steroid alcohols, for example lanolin understands that bbeispielnemunter the trade designation Argowax ® (Pamentier & Co) is available.
- wool wax alcohols which are understood to be triterpenoid and steroid alcohols, for example lanolin understands that bbeispielnemunter the trade designation Argowax ® (Pamentier & Co) is available.
- Fatty acid glycerol esters or fatty acid alkanolamides, but optionally also water-insoluble or only slightly water-soluble polyalkylene glycol compounds, can likewise be used at least in part as a component of the casing.
- the coating used in the method according to the invention preferably contains the majority of paraffin wax. This means that at least 50% by weight of the covering, preferably more, consists of paraffin wax. Paraffin wax contents in the coating of approximately 60% by weight, approximately 70% by weight or approximately 80% by weight are particularly suitable, with even higher proportions of, for example, more than 90% by weight being particularly preferred are preferred. In a special embodiment of the invention, the covering consists exclusively of paraffin wax.
- paraffin waxes have the advantage over the other natural waxes mentioned that there is no hydrolysis of the waxes in an alkaline cleaning agent environment (as is to be expected, for example, from the wax esters), since paraffin wax contains no hydrolyzable groups.
- Paraffin waxes consist mainly of alkanes and low levels of iso- and cycloalkanes.
- the paraffin to be used according to the invention preferably has essentially no constituents with a melting point of more than 70 ° C., particularly preferably of more than 60 ° C. Portions of high-melting alkanes in the paraffin can leave undesired wax residues on the surfaces to be cleaned or the goods to be cleaned if the melting temperature in the detergent solution drops below this. Such wax residues usually lead to an unsightly appearance on the cleaned surface and should therefore be avoided.
- the coating according to the invention preferably contains at least one paraffin wax with a melting point of about 50 ° C. to about 55 ° C.
- the paraffin wax content of alkanes, isoalkanes and cycloalkanes which are solid at ambient temperature is as high as possible.
- the more solid wax components present in a wax at room temperature the more useful it is within the scope of the present invention.
- With increasing proportion of solid wax components the resilience of the coating to impacts or friction on other surfaces increases, which leads to a longer-lasting protection of the coated solid particles.
- High proportions of oils or liquid wax components can weaken the coating, opening pores and exposing the coated solid particles to the environmental influences mentioned at the beginning.
- the casing can break under impact or friction.
- additives can optionally be added to the coating.
- Suitable additives must be able to be mixed completely with the molten wax, must not significantly change the melting range of the casing, must improve the elasticity of the casing at low temperatures, must not generally increase the permeability of the casing to water or moisture and must not increase the viscosity of the melt of the wrapping material should not be increased to such an extent that processing becomes difficult or even impossible.
- Suitable additives which reduce the brittleness of a sheath consisting essentially of paraffin at low temperatures are, for example, EVA copolymers, hydrogenated resin acid methyl ester, polyethylene or copolymers of ethyl acrylate and 2-ethylhexyl acrylate.
- Another useful additive when using paraffin as a coating is the addition of a small amount of a surfactant, for example a C 12 lg fatty alcohol sulfate. This addition results in a better wetting of the material to be embedded through the covering. It is advantageous to add the additive in an amount of about ⁇ 5% by weight, preferably ⁇ about 2% by weight, based on the coating.
- a surfactant for example a C 12 lg fatty alcohol sulfate.
- This addition results in a better wetting of the material to be embedded through the covering. It is advantageous to add the additive in an amount of about ⁇ 5% by weight, preferably ⁇ about 2% by weight, based on the coating.
- the addition of an additive can in many cases lead to the fact that solid particles can also be encased which, without the addition of additives, generally form a tough, plastic body made of paraffin and partially dissolved solid particles after the encapsulation material has melted.
- the coating material may be advantageous to add further additives to the coating material, for example to prevent the particles to be coated from settling prematurely during cooling.
- the anti-settling agents that can be used for this purpose which are also referred to as floating agents, are known from the prior art, for example from the manufacture of lacquers and printing inks.
- silicone oils dimethylpolysiloxanes, methylphenylpolysiloxanes, polyether-modified methylalkylpolysiloxanes
- oligomeric titanates and silanes polyamines, salts from long-chain polyamines and polycarboxylic acids, amine / Amide-functional polyesters or amine / amide-functional polyacrylates.
- Additives from the substance classes mentioned are commercially available in a wide variety.
- Aerosi 200 pyrogenic silicic acid, Degussa
- Bentone ® SD-1, SD-2, 34, 52 and 57 bentonite, Rheox
- Bentone * SD -3, 27 and 38 hectorite, Rheox
- Tixogef EZ 100 or VP-A organically modified smectite, Südchemie
- Tixogef VG, VP and VZ montmorillonite loaded with QAV, Südchemie
- Disperbyk ® 161 block copolymer, Byk- Chemistry
- Borchigen ND sulfo group-free ion exchanger, Borchers
- Ser-Ad ® FA 601 servingo
- Solsperse ® aromatic ethoxylate, ICI
- Surfynof types Air Products
- Tamof and Triton ⁇ types Triton ⁇ types
- the auxiliaries mentioned can be used in varying amounts in the process according to the invention, depending on the wrapping material and the material to be wrapped.
- Usual use concentrations for the abovementioned anti-settling, anti-floating, thioxotropic and dispersing agents are in the range from 0.5 to 8.0% by weight, preferably between 1.0 and 5.0% by weight, and particularly preferably between 1.5 and 3.0% by weight, each based on the end product of the process.
- the coating can also contain one or more of the above-mentioned waxes or wax-like substances as the main constituent.
- the mixture forming the cover should be such that the cover is at least largely water-insoluble.
- the solubility in water should not exceed about 10 mg / 1 at a temperature of about 30 ° C. and should preferably be below 5 mg / 1.
- the coating should have the lowest possible solubility in water, even in water at an elevated temperature, in order to avoid the temperature-independent release of the coated solid particles as far as possible.
- solid particles basically refers to any form of solid materials which can be embedded in an envelope, as described in the context of the present invention, to protect against external influences.
- the solid particles have a particle diameter of at least 0.05 mm, but the particle diameter is preferably above, for example between about 0.1 and about 0.3 mm and particularly preferably between about 0.15 and about 0.25 mm (determined by Sieve analysis). In the case of certain substances to be coated, however, this particle size range can advantageously also be shifted towards higher values, so that the particle sizes are between 0.5 and 2 mm, preferably between 1.0 and 1.5 mm.
- Substances that are preferably used coarser, ie within the latter particle size range are, for example, bleaching agents.
- the individual particles i.e. the solid particles to be coated, are present in crystalline form.
- solid particles preferably refers to those solids that are usually used in the context of an application as part of a cleaning agent.
- solid particles refers to such Detergent components which are unstable to external influences, for example moisture, also in the form of atmospheric moisture, or which are incompatible with at least one further component present in the detergent.
- Such solid particles include, but are not limited to, enzymes, bleaching agents, bleach activators, surfactants and / or fragrances.
- the solid particles themselves form about 10 to about 90% by weight of the total mass of the coated solid particles.
- the coating is usually the 100% by weight missing portion. It is conceivable that the entire covering does not consist of only one layer, but that several layers of different substances may also be applied as the covering. This can be done, for example, in order to influence not only a temperature-dependent dissolution process but also further parameters (for example low initial water solubility or the hardness of the outer casing) of the casing.
- wrapping also encompasses wrapping composed of two or more layers, unless expressly stated otherwise.
- the proportion of the solid particles in the total mass of the coated solid particles is preferably approximately 30% by weight to approximately 75% by weight, particularly preferably approximately 35% by weight to approximately 60% by weight.
- the substances listed below are particularly suitable as solid particles.
- the coated solid particles according to the invention can be used in any type of cleaning agent in which a component has to be protected against external influences or other substances present in the mixture of the component.
- Bleaching agents are suitable as solid particles.
- chlorine or bromine-releasing substances or peroxides preferably organic peroxides or inorganic peroxides, the latter preferably in the form of their alkali metal salts, can be used as bleaching agents.
- Suitable chlorine or bromine-releasing materials include, for example, heterocyclic N-bromo- and N-chloramides, for example trichloroisocyanuric acid, tribromoisocyanuric acid, dibromoisocyanuric acid and / or dichloroisocyanuric acid (DICA) and / or their salts with cations such as potassium and sodium.
- Hydantoin compounds such as 1,3-dichloro-5,5-dimethylhydanthoin are also suitable.
- Anhydrous, water-soluble inorganic salts are also suitable as bleaching agents, e.g. Lithium, sodium or calcium hypochlorite and hypobromite.
- Chlorinated trisodium phosphate is another material suitable as a bleaching agent.
- Organic peracids and diacyl peroxides can also be used as bleaching agents.
- the peracids which can be used in the context of the present invention are solids and are stable in a temperature range which corresponds to the melting range of the coating or is still somewhat above this melting range (approximately up to 10 ° C. above the melting range).
- Typical monoperoxy acids are, for example, alkyl and aryl peroxy acids such as peroxybenzoic acid and their analogs substituted on the benzene ring, aliphatic and substituted aliphatic monoperoxy acids, for example peroxylauric acid or peroxy stearic acid, alkyldiperoxyacids and aryldiperoxyacids such as 1,12-diperoxydodicacidoxyperoxy acid, 1,9-diperoxydylacidoxyperoxy acid, 1,9-doxydoxyacid oxyacid, .
- phthalimidoperoxyhexanoic acid PAP
- the aryldiperoxy acids that can be used in the context of the invention include, for example, dibenzoyl peroxide.
- the inorganic peroxy compounds which can be used in the context of the present invention include, for example, monopersulfates, perborates and percarbonates.
- the inorganic peroxy compounds are generally used as alkali salts, preferably as lithium, sodium or potassium salts.
- the bleaching agents are relatively coarse, ie within the particle size range from 0.5 to 2.0 mm, preferably from 1.0 to 1.5 mm.
- enzymes that can be used in the context of the present invention, for example proteases, amylases, lipases and oxidases come into question.
- Bleach catalysts are also suitable as solid particles in the context of the present invention. These include, for example, manganese salt compounds or complexes, azirdirine compounds or sulfonimine compounds.
- the catalysts are preferably adsorbed on a substrate as a carrier component or at least mixed with the latter in order to achieve the particle size prescribed in the context of the present invention.
- Bleach activators in particular are suitable as solid particles in the context of the present invention.
- Bleach activators are added to detergents containing bleach, since the bleaches containing active oxygen generally only release the active oxygen at elevated temperatures.
- the bleach activators thus enable accelerated release of the active oxygen from the salt containing active oxygen, as is required, for example, in machine-based cleaning agents, for example in machine dishwashing detergents or detergents, even at a relatively low temperature (compared to the temperature required without activators). As a rule, this temperature is approximately above 50 ° C., preferably approximately 60 ° C.
- bleach activators which can be used are, for example, pentaacetylglucose (PAG), l, 5-diacetyl-2,2-dioxohexahydro-l, 3,5-triazine (DAEHT) and isatoic acid amide (ISA).
- PAG pentaacetylglucose
- DAEHT 3,5-triazine
- ISA isatoic acid amide
- N, N, N'N'-tetraacetylethylene diamine (TAED) is particularly preferred for use in the process according to the invention.
- Bleach stabilizers can also be used as solid particles in the context of the present invention.
- the bleach stabilizers include, in particular, phosphonates, borates or metaborates and metasilicates, and also magnesium salts, for example magnesium sulfate.
- Anionic, cationic or nonionic surfactants which can be used are all types of surfactants commonly used in detergents, provided they are solids or have been brought into a solid form (for example by adsorption on a support) and have a particle size of more than 0.05 mm , preferably more than 0.1 mm.
- liquid or at least pasty substances are adsorbed on a suitable carrier material, so that the adsorbate fulfills the conditions according to the invention with regard to state of matter and particle size.
- solid particles coated in this conventional manner generally only show a time-delayed dissolution behavior in an aqueous environment at a temperature below the melting point of the coating, a complete suppression of the release of the coated Material at a temperature below the melting point of the casing or a release that has ended rapidly at least after an initial rise can generally not be achieved in this way.
- the process of melt embedding was chosen for embedding the solid particles.
- the solid to be coated is first dispersed in a melt of the covering material.
- the temperature of the melt must meet two conditions. Firstly, it must be sufficiently high to produce a melt which is as low-viscosity as possible during the dispersion process. On the other hand, however, it must be at a sufficient distance from the temperature which triggers a chemical reaction, for example decomposition, in the solid to be coated. Due to the dispersion of the material to be wrapped in the melt of the wrapping material, the wrapping material is initially essentially completely enclosed by the wrapping material. This is a basic requirement for obtaining essentially completely encased solid particles.
- the dispersion is cooled to a temperature that is approximately in the plastic solidification range of the melt.
- a plastic solidification area is understood to mean an area in which the melt on the one hand has a sufficiently high viscosity to keep the solid particles dispersed therein in a stable dispersion, and on the other hand also has enough plasticity and flowability to easily break without breaking or tearing to be deformable and shearable.
- the temperature can be varied within the plastic solidification range of the coating material so that, for example, an almost liquid, but in any case still flowable mass is obtained up to masses that are no longer flowable. which only show a certain plastic deformability under the influence of external forces. Between these two forms, the mass of coating and solid particles shows a "pasty" behavior.
- the mixture of solid particles and coating composition is subjected to granulation.
- granulation denotes any shaping process that leads to particles of predeterminable size.
- press agglomeration processes can also be used.
- the mixture of coating material and solid particles in the plastic solidification area of the coating is preferably fed continuously to a planetary roller extruder or a 2-shaft extruder or 2-screw extruder with co-rotating or counter-rotating screw guide, its housing and its extruder.
- Granulating head can be heated to the predetermined extrusion temperature.
- extrusions / pressings can also be carried out in low-pressure extruders, in the Kahl press or in the extruder.
- the method according to the invention is carried out by means of pelleting.
- the mixture of coating material and solid particles in the plastic solidification area of the coating is applied to a perforated surface and pressed through the holes by means of a pressure-generating body.
- the mixture of coating material and solid particles in the plastic solidification area of the coating is compressed under pressure, plasticized, pressed by means of a rotating roller in the form of fine strands through a perforated surface and finally comminuted into granules using a knock-off device.
- the most varied configurations of the pressure roller and perforated die are conceivable here.
- the ring die and the press roller can be driven in the same direction, which means that a reduced shear stress and thus a lower temperature increase in the premix can be achieved.
- the granulation process is advantageously chosen so that the granules allow the planned use of the coated solid particles without any further processing step.
- the granules are granulated to a particle size of at most up to about 2 mm, preferably to an underlying value, for example 1.5 mm or 1 mm.
- the lower limit of the particle size being determined by the minimum size of the coated solid particles plus the thickness of the coating.
- Preferred particle diameters for the granules are therefore in the range of approximately one millimeter or slightly less, for example in a range of approximately 0.5 mm to 1 mm.
- the plastically solidified mass of solid particles and coating material is subjected to a screen granulation process.
- Preferred sieves have a mesh size within the maximum particle diameter for the granules of up to about 2 mm.
- a granulate obtained from coated solid particles by the process according to the invention contains more than one solid particle.
- the method according to the invention has a decisive advantage. While in the case of conventionally coated solid particles, an incomplete coating renders the entire particle unusable, an irregularity, for example a crack in the coating of the granules according to the invention, only leads to the unusability of the respective solid particles lying in the area of influence of the irregularity in the affected area of the granules. Solid particles that lie further inside the granulate or on an opposite side of the crack, for example, are generally not affected by this action.
- the method according to the invention thus leads to a larger number of completely coated particles in comparison with conventional coating methods and thus to an improved shielding of the solid particles from external influences.
- Propylene oxide units fatty amine polyalkylene ethers, preferably with ethylene oxide or propylene oxide units, alkoxylated triglycerol, preferably alkoxylated with ethylene oxide or propylene oxide, alk (en) yl oligoglucosides, fatty acid N-alkyl glucamides, protein fatty acid condensates, polyol fatty acid esters, sugar esters, sorbitan esters and polysorbates. If the nonionic surfactants contain polyalkylene ether chains, they can have a conventional, but preferably a narrow, homolog distribution.
- Sequestering agents can also be used together with the coated solid particles according to the invention.
- Typical sequestering agents are those from the class of aminopolycarboxylic acids and polyphosphoric acids.
- Aminopolycarboxylic acids include, for example, nitrilotritic acetic acid, ethylenediaminetetraacetic acid,
- Diethylenetriamine tetraacetic acid and its higher homologues Diethylenetriamine tetraacetic acid and its higher homologues.
- Suitable polyphophonic acids are 1-hydroxy ethane-1, 1-diphosphonic acid,
- polyacetal carboxylic acids as described, for example, in US Pat. Nos. 4,144,226 and 4,146,495, which are obtained by polymerizing esters of glycolic acid, introducing stable terminal end groups and saponifying the respective sodium or potassium salts.
- polymeric acids which are obtained by polymerizing acrolein and disproportionating the polymer according to Canizzaro using strong alkalis. They are essentially made up of acrylic acid units and vinyl alcohol units or acrolein units.
- Cationic surfactants or amphoteric surfactants can also be used together with the coated solid particles according to the invention.
- the invention is illustrated below by examples, which, however, are not to be understood as a limitation of the invention.
- the coated TAED granules were used in an amount of 1 g / 1 surfactant solution.
- the amount of TAED released was then determined iodometrically at different temperatures using a peracetic acid titration.
- Figure 3 shows that the particle size of the solid particles used has a decisive influence on the release rate. If a finely ground product is used instead of the crystalline TAED, a tough, plastic body of paraffin and partially dissolved TAED is formed after the coating material has melted (without added additive), which hardly releases the TAED.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98934968A EP0993509A1 (de) | 1997-06-25 | 1998-06-17 | Umhüllte reinigungsmittelkomponente |
JP50525399A JP2002506476A (ja) | 1997-06-25 | 1998-06-17 | 被覆洗剤成分 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19727073.5 | 1997-06-25 | ||
DE1997127073 DE19727073A1 (de) | 1997-06-25 | 1997-06-25 | Umhüllte Reinigungsmittelkomponente |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999000476A1 true WO1999000476A1 (de) | 1999-01-07 |
Family
ID=7833668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/003654 WO1999000476A1 (de) | 1997-06-25 | 1998-06-17 | Umhüllte reinigungsmittelkomponente |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0993509A1 (de) |
JP (1) | JP2002506476A (de) |
DE (1) | DE19727073A1 (de) |
WO (1) | WO1999000476A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6992056B1 (en) | 1997-12-30 | 2006-01-31 | Henkel Kgaa | Process for preparing detergent tablets having two or more regions |
US6410500B1 (en) | 1997-12-30 | 2002-06-25 | Henkel Kommanditgesellschaft Auf Aktien | Moulded body dishwasher detergents with soil release polymers |
DE19817964A1 (de) * | 1998-04-22 | 1999-10-28 | Henkel Kgaa | Umhüllte Reinigungsmittelkomponente |
DE19918457A1 (de) * | 1999-04-23 | 2000-10-26 | Henkel Kgaa | Leistungsgesteigerte teilchenförmige Reinigungsmittel für das maschinelle Geschirrspülen |
US6521576B1 (en) | 2000-09-08 | 2003-02-18 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Polycarboxylic acid containing three-in-one dishwashing composition |
US6492312B1 (en) | 2001-03-16 | 2002-12-10 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Water soluble sachet with a dishwashing enhancing particle |
US6475977B1 (en) | 2001-03-16 | 2002-11-05 | Unilever Home & Personal Care Usa, Division Of Conopco, Inc. | Water soluble sachet with a dishwasher composition |
EP2414497A1 (de) * | 2009-04-02 | 2012-02-08 | The Procter & Gamble Company | Zusammensetzung mit abgabepartikeln |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2281160A1 (fr) * | 1974-08-06 | 1976-03-05 | Nobel Hoechst Chimie | Procede d'enrobage et de granulation du tetraacetylglycolurile (tagu) et de la tetraacetylethylenediamine (taed) |
EP0346034A2 (de) * | 1988-06-06 | 1989-12-13 | Unilever Plc | Von Wachs umschlossene Aktivstoffe und ein Emulsionsverfahren zu ihrer Herstellung |
EP0382464A2 (de) * | 1989-02-09 | 1990-08-16 | Unilever Plc | Verfahren zur Umhüllung |
EP0436971A2 (de) * | 1989-11-15 | 1991-07-17 | Unilever N.V. | Mit Wachs verkapselte Bleichpartikel und Verfahren zur Herstellung |
JPH06145695A (ja) * | 1992-11-12 | 1994-05-27 | Nippon Koonsutaac Kk | 被覆処理漂白活性化剤 |
-
1997
- 1997-06-25 DE DE1997127073 patent/DE19727073A1/de not_active Withdrawn
-
1998
- 1998-06-17 WO PCT/EP1998/003654 patent/WO1999000476A1/de not_active Application Discontinuation
- 1998-06-17 JP JP50525399A patent/JP2002506476A/ja active Pending
- 1998-06-17 EP EP98934968A patent/EP0993509A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2281160A1 (fr) * | 1974-08-06 | 1976-03-05 | Nobel Hoechst Chimie | Procede d'enrobage et de granulation du tetraacetylglycolurile (tagu) et de la tetraacetylethylenediamine (taed) |
EP0346034A2 (de) * | 1988-06-06 | 1989-12-13 | Unilever Plc | Von Wachs umschlossene Aktivstoffe und ein Emulsionsverfahren zu ihrer Herstellung |
EP0382464A2 (de) * | 1989-02-09 | 1990-08-16 | Unilever Plc | Verfahren zur Umhüllung |
EP0436971A2 (de) * | 1989-11-15 | 1991-07-17 | Unilever N.V. | Mit Wachs verkapselte Bleichpartikel und Verfahren zur Herstellung |
JPH06145695A (ja) * | 1992-11-12 | 1994-05-27 | Nippon Koonsutaac Kk | 被覆処理漂白活性化剤 |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 468 (C - 1244) 31 August 1994 (1994-08-31) * |
Also Published As
Publication number | Publication date |
---|---|
DE19727073A1 (de) | 1999-01-07 |
JP2002506476A (ja) | 2002-02-26 |
EP0993509A1 (de) | 2000-04-19 |
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