JP2002501978A - Detergent tablet - Google Patents

Abstract

  (57) [Summary] The present invention discloses a two-phase or multi-phase detergent tablet of compressed granular detergent comprising a surfactant, a builder and optionally other detergent components. The surfactant content of each tablet phase does not change by more than 3% by weight, based on the weight of each phase. Thus, by making the surfactant content of each phase as uniform as possible, it is possible to obtain a multi-phase detergent molded article having excellent properties.

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD The present invention relates generally to detergent tablets. More particularly, the present invention relates to a multi-phase detergent tablet, such as used for washing laundry by a domestic electric washing machine.

2. Description of the Related Art Tablets have various advantages such as easy weighing, easy packaging, transportation and storage. Therefore, it seems desirable to produce a detergent in tablet form.
The prior art on detergent tablets is numerous and is particularly concerned with solving the contradictory problems of tablets, namely tablet hardness and easy disintegration of tablets. While sufficient hardness is essential for tablet packaging, storage and transportation, the disintegration properties of tablets have a significant effect on the washing process, and disintegration is rapid enough to form the proper concentration of washing liquid. Speed is essential.

The problem is further complicated for multi-phase tablets in finding an industrially reasonable compromise between tablet hardness and disintegration properties. It is advantageous to have certain detergent components separate from other components during the washing process. However, such separation leads to differences in physical properties between the tablet phases. That is,
In extreme cases, the adhesion of the mesophase is lost so that the multiphase tablet can no longer be formed. If the hardness differences between the phases are large, certain phases may be more damaged during packaging, transport and handling than other phases. In addition, if the disintegration / dissolution rates between the phases are significantly different, this is also undesirable because other active ingredients from the more slowly disintegrating / dissolving phases will not be available in the washing process.

Thus, in the case of multi-phase detergent tablets, even if the surfactant content of each phase is different, all the phases adhere to one another and have a sufficient and comparable hardness, and are rapid or comparable. Having a disintegration / dissolution rate is very important. No solution to such a problem has been proposed in the prior art.

[0005] Detergent tablets in which the phases are separated from one another are disclosed (EP-A-0 481 7).
93, Unilever). The detergent tablets disclosed in this document contain sodium percarbonate separated from all other ingredients that can affect its stability. Nor does this reference mention hardness and / or disintegration properties as a function of phase composition.

[0006] EP-A-0 466 485 (Unilever) discloses a detergent tablet produced by tableting granules containing two surfactants. The first granules contain the entire amount of anionic surfactant, while the second granules preferably do not contain anionic surfactant. Nor does this reference mention hardness and / or disintegration properties as a function of phase composition.

[0007] Accordingly, the problem to be solved by the present invention is to provide a multi-phase detergent tablet which has solved the above disadvantages. In particular, it is an object of the present invention to provide a multiphase detergent tablet having a high hardness and a high disintegration / dissolution rate in all phases, despite the fact that the surfactant content of each phase differs from one another. It is. DISCLOSURE OF THE INVENTION According to the present invention, it has been found that multiphasic detergent tablets with excellent properties can be produced if the surfactant content of each phase is significantly varied in relation to each other.

[0008] Accordingly, the present invention relates to a two-phase or multi-phase detergent tablet of a compressed granular detergent comprising a surfactant, a builder and optionally other detergent components, wherein the surfactant content of each phase of the tablet is determined by the A tablet characterized by being changed in an amount of 3% by weight or less based on the weight of the tablet.

As used herein, the term “change in surfactant content in an amount of 3% by weight or less based on the weight of each phase” means that the absolute value of the surfactant content in each phase is 3% by weight. It means to change by the following amount. Thus, if one phase contains 20% by weight of the surfactant, the surfactant content of the other phase should be selected so that the change from the value of about 20% by weight is up to 3% by weight. is there. That is, the difference between the numerical value of the% ratio of the low surfactant content phase and the numerical value of the% ratio of the high surfactant content phase, as obtained as the difference of the surfactant ratio% between each phase, is ≦ 3. Should be.

[0010] According to one preferred embodiment of the present invention, the surfactant content of each phase varies by less than 3% by weight, based on the weight of each phase. Also, according to a preferred embodiment of the present invention, the difference in surfactant content between each phase of the tablet is less than 2% by weight, preferably less than 1.5% by weight, more preferably less than 1.5% by weight, based on the weight of each phase. Not more than 1% by weight.

According to one particularly preferred embodiment of the invention, the surfactant content of each phase of the tablet is
The same amount. The products of the present invention are industrially available in batch sizes of several tons, usually 100
Because of the use of surfactants in amounts less than g, small differences in the surfactant content of each phase cannot be completely controlled. Thus, as used herein, the term "same amount of surfactant in each phase" includes cases where the surfactant content varies on the order of 0.1% by weight.

Tablet Form According to the present invention, each phase of the tablet can take various three-dimensional forms. The simplest embodiment is a two-layer or multi-layer tablet, where each layer of the tablet is composed of a single phase. However, according to the present invention, it is possible to produce multiphase tablets in which the individual phases take the form of being subsumed within other phases. In addition to the "ring / core" type tablet or the jacket type tablet, the specific examples described above can be used in combination. An example of a polyphase tablet is EP-A-0 055 100 (
Jeyes), which is a toilet cleaning block. A technically common form of multiphase tablet is a bilayer or multilayer tablet. Thus, the tablet phase is preferably in the form of a layer.

Surfactant Content of Each Phase of the Tablet According to the invention, the surfactant content of each phase of the tablet varies by no more than 3% by weight, based on the weight of each phase. The determination of the surfactant content is based on the total amount of surfactant present in a particular phase, regardless of the type of surfactant contained. For example, if one phase comprises an anionic surfactant and a non-ionic surfactant, the total surfactant content of this phase is the total amount of the anionic surfactant and the non-ionic surfactant. is there.

Surfactant Mixed Forms Surfactants can be incorporated into the individual phases in a single form. For example,
In the case of soaps or other easily treatable surfactants, the surfactants can be incorporated in a single form. However, for many surfactants, it is recommended to incorporate a surfactant mixture rather than a single surfactant. Such compound mixtures should contain a high content of surfactant for certain applications, but can be prepared by conventional methods such as spray drying, granulating, and compounding. Combinations of some or only surfactant granules with surfactant alone are of course also possible.

According to the present invention, the surfactant can be introduced into the tablet phase by one or more surfactant-containing granules.

According to one preferred embodiment of the invention, different surfactants can be used for the individual phases. However, the individual phases can also be composed of surfactants from the same granules, as are present in all phases of the tablet. According to another preferred embodiment of the present invention, the same surfactant-containing granules are used for all phases of the tablet.

According to the present invention, the simplest possible embodiment is a biphasic tablet in which the phases are present in layers such that the same surfactant-containing granules are used in different amounts in the two layers. Such tablets, consisting of two layers containing the same surfactant-containing granules, can easily be manufactured by the usual tableting methods.

Surfactant The detergent tablet of the present invention can use a surfactant substance selected from the group consisting of anionic, nonionic, cationic and amphoteric surfactants and mixtures thereof. From the viewpoint of use, anionic surfactants or nonionic surfactants are preferred. The total surfactant content of the tablet is from 5 to 60% by weight, preferably greater than 15% by weight, based on the tablet weight.

Anionic surfactants Suitable anionic surfactants are, for example, sulfonate type surfactants and sulfate ester type surfactants. Suitable anionic surfactants of the sulfonate type are preferably C ₉ -C ₁₃ alkylbenzene sulfonates, olefin sulfonates (ie a mixture of alkene sulfonates and hydroxyalkane sulfonates),
And a disulfonic acid salt, which may, for example, using a C ₁₂ -C ₁₈ monoolefins having a double bond at the internal and terminal, which was sulfonated with sulfur trioxide gas, then the resulting sulfonation products The product can be obtained by alkali hydrolysis or acid hydrolysis. Other suitable sulfonate-type surfactants, with C ₁₂ -C ₁₈ alkanes,
This is, for example, an alkane sulfonate obtained by sulfochlorination or sulfonation followed by hydrolysis or neutralization. Further, esters of α-sulfofatty acids (ester sulfonates) such as hydrogenated coconut oil, palm kernel oil or tallow fatty acid α
-Sulfonated methyl esters are also suitable.

Other suitable anionic surfactants are sulphonated fatty acid glycerol esters. As used herein, the term "fatty acid glycerol ester" is obtained by esterifying monoglycerol with 1-3 mol of fatty acids or transesterifying triglycerol with 0.3-2 mol of glycerol. Such monoesters, diesters and triesters and mixtures thereof. Suitable sulfonated fatty acid glycerol esters are the sulfonation products of C _{6 ~ 22} saturated fatty acids, as the saturated fatty acids include caproic acid, capric acid,
Examples thereof include capric acid, myristic acid, lauric acid, palmitic acid, stearic acid, and behenic acid.

Preferred alkyl (alkenyl) sulfates are the alkali metal salts, especially the sodium salts, for the sulfuric acid semiesters of fatty alcohols. As fatty alcohol,
C ₁₂ -C ₁₈ fatty alcohols, for example, coconut oil fatty alcohols, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol and the like,
Further, C ₁₀ -C ₂₀ oxo alcohols and secondary alcohols having the same chain length are exemplified.
Other suitable alkyl (alkenyl) sulphates are those having the above-mentioned chain length and containing synthetic straight-chain alkyl chains of petrochemical systems and exhibiting similar disintegration behavior to the corresponding compounds of fat and oil chemistry raw material systems. It is. C ₁₂ -C ₁₆ alkyl sulfates, C ₁₂ -C ₁₅ alkyl sulfates and C ₁₄ -C ₁₅ alkyl sulfates are especially preferred in view of the washing performance. Other suitable anionic surfactants are 2,3-alkyl sulfates, for example,
It can be manufactured by the method described in US 3,234,258 or US 5,075,041 and has the registered trademark DAN (S
hell Oil Company).

Also, a linear or branched chain ethoxylated with 1 to 6 mol of ethylene oxide (EO)
Sulfuric acid monoesters of C ₇ -C ₂₁ alcohols, such as sulfuric acid monoesters of 2-methyl branched C ₉ -C ₁₁ alcohols (EO average 3.5 mol) or C ₁₂ -C ₁₈ fatty alcohols (EO1
~ 4 mol) are also suitable. Due to their high foaming capacity, such surfactants are used only in relatively small doses in detergents, for example in doses of 1 to 5% by weight.

Other suitable anionic surfactants are salts of alkyl sulfosuccinates, which are also known as sulfosuccinates or sulfosuccinates. The surfactant comprises a sulfosuccinic acid and an alcohol (preferably a fatty alcohol, especially an ethoxylated fatty alcohol).
And a monoester and / or a diester. Suitable sulfosuccinates, C ₈ -C ₁₈ fatty alcohol residues or mixtures thereof are exemplified. Particularly preferred sulfosuccinates comprise fatty alcohol residues derived from ethoxylated fatty alcohols, which, by themselves, can also be referred to as nonionic surfactants (see description below). And). Of these sulfosuccinates, those whose fatty alcohol residues are obtained from a narrow range of ethoxylated fatty alcohols are particularly preferred. Alkyl (alkenyl) succinic acids having preferably an alkyl (alkenyl) chain having 8 to 18 carbon atoms and salts thereof can also be used.

Other suitable anionic surfactants are, in particular, soaps. Particularly suitable soaps are those of saturated fatty acids, for example salts of lauric acid, myristic acid, palmitic acid, stearic acid, hydrogenated erucic acid and behenic acid, and especially natural fatty acids such as coconut oil, palm kernel oil or tallow. It is a soap mixture obtained from fatty acids.

The anionic surfactant, including the soap, can be in the form of a sodium, potassium or ammonium salt and can be in the form of a soluble salt of an organic base such as mono, di or triethanolamine. The anionic surfactant can preferably be present in the form of a sodium and / or potassium salt, particularly preferably in the form of a sodium salt.

Nonionic surfactants Suitable nonionic surfactants are alkoxylated (preferably ethoxylated) primary alcohols, especially ethylene oxide adducts of primary alcohols having 8 to 18 carbon atoms (1 mol of alcohol). Average of 1 to 12 mol of ethylene oxide (EO) per alcohol), the alcohol residues of which may be straight-chain or preferably 2-methyl-branched; It can be included in the form of a mixture typically present in residues. However, it contains straight-chain residues of natural alcohols having 12 to 18 carbon atoms, such as coconut oil, palm oil, tallow or oleyl alcohol,
Alcohol ethoxylates containing an average of 2 to 8 mol of EO per mol are particularly preferred. Suitable ethoxylated alcohols, for example C ₁₂ -C ₁₄ alcohol (3EO or is 4EO-containing), C ₉ -C ₁₁ alcohol (7 EO content), C ₁₃ -C ₁₅ alcohol (3EO, 5E
O, 7EO or 8EO containing), C ₁₂ -C ₁₈ alcohol (3EO, 5 EO or 7EO containing) and mixtures thereof, for example, a C ₁₂ -C ₁₄ alcohol (3EO containing) C ₁₂ -C ₁₈ alcohol (5 EO content) Are included. The degree of ethoxylation described above can be indicated by a statistical average and may be an integer or a fraction for a particular product. Suitable alcohol ethoxylates have a narrow homolog distribution (narrow range ethoxylate, NRE). In addition to the above nonionic surfactants, fatty alcohols containing more than 12 mol of EO can also be used, for example, 14EO, 25EO, 30EO
Or tallow alcohol containing 40EO.

Examples of the nonionic surfactant include an alkyl glycoside represented by the formula: RO (G) x. In the formula, R is a primary, straight-chain or methyl-branched (particularly, 2-methyl-branched) aliphatic group having 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms, and G is 5 or 6 carbon atoms.
Is a glucose unit (preferably a glucose unit). The degree of oligomerization x indicates the distribution of monoglycosides and oligoglycosides, and is a numerical value of 1 to 10, preferably 1.2 to 1.4.

[0028] Other suitable non-ionic surfactants can be used alone or in combination with other surfactants and can be alkoxylated, preferably ethoxylated or ethoxylated / propoxylated fatty acid alkyl esters (preferably 1 to 4 carbon atoms in the alkyl chain), particularly fatty acid methyl esters (for example, esters described in Japanese Patent Application No. 58/217598, preferably esters prepared by the method described in WO-A-90 / 13533). .

Further, amine oxide type nonionic surfactants are also suitable, and examples thereof include N-cocoalkyl-N, N-dimethylamine oxide and N-tallowalkyl-N, N-dihydroxyethylamine oxide, In addition, fatty acid alkanolamide type nonionic surfactants are also suitable. The dose of such non-ionic surfactant is preferably lower than the dose of ethoxylated fatty alcohol, more preferably less than half.

Another suitable surfactant is a polyhydroxy fatty acid amide represented by the following formula (I).

Embedded image In the above formula, RCO is an aliphatic acyl group having 6 to 22 carbon atoms, R ¹ is hydrogen, an alkyl group or a hydroxyalkyl group having 1 to 4 carbon atoms, and [Z] is 3 to 10 carbon atoms / the number of hydroxyl groups.
3 to 10 linear or branched polyhydroxyalkyl groups. Polyhydroxyfatty acid amides can be obtained by reductive amination of reducing sugars with ammonia, alkylamines or alkanolamines, followed by acylation with fatty acids, fatty acid alkyl esters or fatty acid chlorides.

As a group of polyhydroxy fatty acid amides, compounds represented by the following formula (II) are exemplified.

Embedded image In the above formula, R is a linear or branched alkyl or alkenyl group having 7 to 12 carbon atoms,
R ¹ is a linear, branched or cyclic alkyl or aryl group having 2 to 8 carbon atoms,
R ² is a linear, branched or cyclic alkyl group or aryl group or oxyalkyl group having 1 to 8 carbon atoms, preferably a C ₁ -C ₄ alkyl group or a phenyl group, and [Z] is an alkyl chain A linear polyhydroxyalkyl group substituted by at least two hydroxyl groups, or an alkoxylated (preferably ethoxylated or propoxylated) derivative thereof.

Suitably, [Z] may be obtained by reductive amination of a reducing sugar (eg, glucose, fructose, maltose, lactose, galactose, mannose or xylose). The N-alkoxy or N-aryloxy-substituted compound is then converted to the desired polyhydroxy fatty acid amide by reacting it with a fatty acid methyl ester in the presence of an alkoxide as a catalyst, for example according to International Patent Application WO-A-95 / 07331. can do.

According to one preferred embodiment of the present invention, the detergent tablet comprises, as surfactants, anionic and nonionic surfactants. The use of various surfactants in certain proportions provides performance advantages.

For example, according to one particularly preferred embodiment of the present invention, the ratio of anionic surfactant / nonionic surfactant is 10: 1 to 1:10, preferably 7.5 to 1: 5. And more preferably 5
: 1 to 1: 2.

The absence of certain surfactants in certain or any of the phases of the detergent tablet may provide certain performance benefits. According to a preferred embodiment of the present invention, at least one of said phases does not contain a non-ionic surfactant.

As an alternative, improved action is also obtained when certain surfactants are present in the whole tablet, ie in all phases. According to the invention, it has been found to be particularly advantageous if the above-mentioned alkyl polyglycosides are introduced and at least one of the phases comprises an alkyl polyglycoside.

As with non-ionic surfactants, elimination of anionic surfactants from each or all phases can result in detergent tablets suitable for certain applications. Thus, according to a preferred embodiment of the present invention, at least one of said phases does not comprise an anionic surfactant.

Builders In addition to the above detergent substances, the most important constituent in detergents is the builder. According to the detergent tablet of the present invention, all ordinary builders can be used, for example, zeolites, silicates, carbonates, organic cobuilders, and phosphates, as long as they do not damage ecologically. Can be used.

A suitable crystalline layered sodium silicate has the formula: Na ₂ MSi _x O _{2x + 1} yH ₂ O Wherein M is sodium or hydrogen, x is a number from 1.9 to 4, y is a number from 0 to 20, and a preferred value for x is 2, 3 or 4. Crystalline sheet silicates of this kind are described, for example, in European Patent Application EP-A-0 164 514. Preferred crystalline layered silicates of the above formula are those wherein M is sodium and x is a number of 2 or 3. Particularly preferably, both β- and δ-sodium silicates of the formula: Na ₂ Si ₂ O ₅ yH ₂ O can be used, and β-sodium silicate can be obtained by methods described in the literature. (See, for example, WO-A-91 / 08171).

Other useful builders include a coefficient (ratio of Na ₂ O: SiO ₂ ) of about 1: 2 to about 1: 3.3, preferably about 1: 2 to 1: 2.8, more preferably about 1: 2. Amorphous sodium silicate having a 2-1: 2.6, which exhibits multiple wash cycle characteristics due to delayed dissolution. In the prior art amorphous sodium silicate, delayed dissolution can be obtained in various ways, such as surface treatment, compounding treatment, compression or overdrying. The term "amorphous" as used herein refers to X-ray amorphous. That is, silicate
X-ray diffraction experiments show no sharp X-ray reflections typical of crystalline materials and, at best, reduce the maximum value of scattered X-rays with a range of diffraction angles by several degrees to one or more. Only show. However, particularly good builder properties can be achieved in electron diffraction experiments, even when the silicate particles form a bent or sharp diffraction maximum. This means that the crystallite area of the product has a size of 10 to several hundred n
m (up to 50 nm), the dimensions of which are particularly preferably up to 20 nm. Such so-called X-ray amorphous silicates exhibiting dissolution properties which are slower than ordinary water glass are described in DE-A-44 00 024. Compressed amorphous silicates, compounded amorphous silicates and overdried X-ray amorphous silicates are particularly preferred.

The synthetic zeolite containing microcrystals and bound water that can be used in the present invention is preferably zeolite A and / or P. Commercially available zeolite MAP® (Crosfield)
Is a particularly preferred zeolite P. However, zeolites X and mixtures of zeolites A, X and / or P are also suitable. A eutectic of zeolite X and zeolite A (about 80% by weight of zeolite X) is also suitable for the present invention, for example, as a commercial product (VEGOBOND AX®, CONDEA Augusta S. p. A.) And the formula:
_{nNa 2 O · (1-n} ) k 2 O · Al 2 O 3 · (2-2.5) can be represented by _{SiO 2 · (3.5-5.5) H 2} O.

Zeolites can be used as builders in granular compound compositions and also as powdering agents for the mixture itself to be compressed. Usually, zeolites are incorporated into the premix in these two aspects. Suitable zeolites are
It has an average particle size of less than 10 μm (volume distribution measured by the Coulter Counter Method) and preferably contains 18 to 22% by weight, more preferably 20 to 22% by weight of bound water.

Known phosphates can of course also be used as builder substances, provided they are ecologically sound. Preferred phosphate builders are sodium salts such as orthophosphoric acid and pyrophosphoric acid, and particularly preferred phosphate builders are sodium salts of tripolyphosphoric acid.

Useful organic builders, provided that they are ecologically safe for use, for example,
Useful polycarboxylic acids (e.g. in the form of the sodium salt), examples of which are citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA) and the like. And mixtures thereof. Suitable salts are salts of polycarboxylic acids, examples of carboxylic acids include citric, adipic, succinic, glutaric, tartaric, sugar acids and mixtures thereof.

[0045] According to the disintegrant present invention, by mixing the tablet for disintegration agent into highly compressed tablet, to promote disintegration of the tablet, it is possible to shorten the disintegration time. Reference [Roempp (9th edition, Volume 6, p. 4440) and Voight "Lehrbuch der pharmazeutischen Techno
According to logie "(6th edition, 1987, pp. 182 to 184), tablet disintegrants or disintegration accelerators disintegrate tablets rapidly in water or gastric juice to allow absorption of pharmaceutically active ingredients. It is an auxiliary for release.

The disintegrants as described above increase their capacity by invasion of water. That is,
On the one hand the intrinsic volume is increased (swelling) and on the other hand a pressure is created by the release of gas, which causes the tablet to disintegrate and form small particles. An example of a known disintegrant is the carbonate / citric acid system, in which other organic acids can also be used. Swellable disintegrants are, for example, synthetic polymers such as polyvinylpyrrolidone (PVP) or natural polymers and / or modified natural substances such as cellulose and starch and their derivatives, alginate or casein derivatives.

Suitable detergent tablets contain one or more disintegrants, the dosage of which is 0.5 to 10% by weight, preferably 3 to 7% by weight, especially 4 to 10% by weight, based on the tablet weight.
~ 6% by weight.

According to the invention, suitable disintegrants according to the invention mean cellulosic disintegrants
I do. Thus, suitable detergent tablets include this type of cellulosic disintegrant.
The dose of the disintegrant is 0.5 to 10% by weight, preferably 3%, based on the weight of the tablet.
-7% by weight, especially 4-6% by weight. Pure cellulose has the empirical formula: (C₆H_TenO_Five) _n And formally called cellobiose β-1,4-polyacetal.
Composed of two glucose molecules. Suitable cellulose is about 500-5,000 glue
It is composed of course units and thus has an average molecular weight of 50,000-500,000. According to the present invention, the cell starting from cellulose and obtained by the polymerization analog reaction is obtained.
Lulose derivatives can also be suitably used as a cellulosic disintegrant. This
As a chemically modified cellulose such as an ester substituted with a hydrogen atom of hydroxy
Illustrative are the reaction products of the etherification or etherification. However, the hydroxyl group
Cellulose substituted with a functional group to which an oxygen atom is not bonded is referred to as a cellulose derivative.
It can also be used. This group of cellulose derivatives includes alkali metal
Illustrated are cellulose, carboxymethylcellulose (CMC), cellulose esters and ethers, and aminocellulose.

The above-mentioned cellulose derivative is suitably used in the form of a mixture with cellulose, without being used alone as a cellulosic disintegrant. The content of the cellulose derivative in the mixture is preferably less than 50% by weight, more preferably less than 20% by weight, based on the cellulosic disintegrant. According to a particularly preferred embodiment, pure cellulose without cellulose derivatives is used as cellulosic disintegrant.

The cellulose used as disintegrant is preferably not used in finely divided form, but instead may be granulated or compressed before mixing with the premix to be compressed To a relatively coarse form. Detergent tablets contain the disintegrant in granular form or optionally in co-granulated form as described in the following literature: DE
197 09 991 (Stefan Herzog), DE 197 10 254 (Henkel) and PCT / EP 98/1
203 (Henkel). These references disclose details about the preparation of granulated, compressed or co-compressed cellulosic disintegrants. The particle size of such disintegrants is such that at least 90% by weight is usually above 200 μm, preferably between 300 and 1600 μm, in particular between 400 and 1200 μm. The relatively coarse cellulosic disintegrants described herein and in the above-mentioned patent documents are suitable for use as the disintegrant of the present invention, and these are commercially available products (for example, Arbocel TF-30-HG, registered trademark). Rettenmaier).

Furthermore, microcrystalline cellulose can be used as a cellulosic disintegrant or as a component of this disintegrant. This microcrystalline cellulose can only attack the amorphous regions and completely dissolve the amorphous regions, while partially hydrolyzing the cellulose under conditions that do not alter the crystalline regions (about 70%) ( About the total weight of cellulose
30%). Subsequent non-agglomeration of the microcrystalline cellulose formed by the hydrolysis results in microcrystalline cellulose having a primary particle size of about 5 μm, which can be compressed to particles having an average particle size of 200 μm, for example.

The detergent tablets of the present invention comprise a disintegrant, preferably a cellulosic disintegrant, preferably in granular, co-granulated or compressed form, the dosage of the disintegrant being based on the tablet weight, 0.5 to 10% by weight, preferably 3 to 7% by weight, especially 4 to 6% by weight.

General Preparation of Tablets The detergent tablets of the present invention are prepared by placing the mixture to be compressed into a cavity of a press and compressing it. Tablet manufacturing (hereinafter simply "
Tableting. " In the simplest case, the mixture to be compressed is directly (ie,
Compress (without prior granulation). This so-called direct compression method is simple and cost-effective. This is because no other steps (and thus no additional equipment) are required. However, such advantages are offset by the following disadvantages. For example, a powder mixture to be compressed directly needs sufficient plastic deformation properties and good flow properties. In addition, the powder mixture should not show any tendency for phase separation during storage, transport, filling of dies, and the like. Unfortunately, for many mixtures, these three requirements can only be achieved with significant difficulty. For this reason, the direct tableting method, especially the direct tableting method for manufacturing detergent tablets, has hardly been adopted. That is, with respect to detergent tablets, the usual route of manufacture begins with the fine powder component ("primary particles"), which are conventionally agglomerated or granulated to form larger size secondary particles. . The granules or granule mixture obtained are then mixed with the respective grinding aids and the mixture is compressed.

Depending on the composition of the multiphase detergent tablet, a premix of different composition is filled into the die at each step. According to the manufacture of multilayer tablets, applying light pressure during premix filling may be advantageous for the next step. In the case of ring / core tablet or jacket tablet production, such pre-compression and molding / forming steps are almost essential.

A preferred detergent tablet of the present invention comprises at least one surfactant-containing granule,
It is obtained by tableting a granular premix comprising at least one post-added powder component. Surfactant-containing granules can be manufactured by conventional methods such as mixer and pan granulation, fluid bed granulation, extrusion, pelletizing or compression. For later detergent tablets, the bulk density of the premix to be compressed is
It is advantageous to approach the bulk density of a conventional compressed detergent. Particularly preferably, the bulk density of the premix to be tableted is at least 500 g / l, preferably at least 600 g / l
Especially above 700 g / l. Another advantage can be obtained by using surfactant granules in a relatively narrow particle size range. According to a preferred embodiment of the present invention, the surfactant-containing granules have a particle size of 10 to 4,000 μm, preferably 100 to 2,000 μm, more preferably 600 to 1,400 μm.

The particle size distribution of the post-treatment components in powder form to be added later can be varied and, according to one preferred embodiment of the invention, preferably the later-mixed powder-forming components are: It has the same particle size distribution as the granules used.

Prior to compressing the granular premix to form a detergent tablet, the premix can be “pulverized” with a particulate treating agent. This is advantageous for both the premix (storage, tableting) and the final detergent tablet, for their quality and physical properties. Fine particle powdering agents have been conventionally known, and usually, inorganic salts such as zeolite and silicate are employed. Preferably, however, the premix is pulverized with fine-particle zeolites, preferably faujasite-type zeolites.

Faujasite-type zeolite As used herein, the term "faujasite-type zeolite" refers to all three zeolites that constitute the faujasite subgroup of zeolite structure group 4 [Don
ald W. Breck: "Zeolite Molecular Sieves", Jhon Wieley & Sons, New York, London, Sydney, Toronto, 1974, p. 92]. Thus, according to the invention, in addition to zeolite X, zeolite Y and faujasite and mixtures of these compounds can also be used, but zeolite X alone is preferred.

The co-crystallized mixture of faujasite-type zeolite and another zeolite is:
Naturally, it does not belong to the zeolite structure group 4, but can be used for powdering. In this case, advantageously, at least 50% of the zeolite component consists of faujasite-type zeolites.

According to one preferred embodiment of the present invention, a preferred detergent tablet comprises a granular premix comprising a granulate component and a subsequently mixed powder-forming component, wherein the subsequently mixed powder-forming component. Of which, one is a faujasite type zeolite having a particle size of less than 100 μm, preferably less than 10 μm, more preferably less than 5 μm, wherein the zeolite is at least 0.2% by weight of the premix to be compressed, Preferably at least 0.5% by weight
, More preferably, more than 1% by weight.

The post-treatment component of the fine particles having the above-mentioned particle size can be dry-mixed with the premix to be tableted. However, it is possible and advantageous to add a small amount of liquid component to cause the particulate post-treatment component to adhere to the relatively rough particle surface. Such pulverization methods are widely disclosed in the prior art literature and are well known to those skilled in the art. Liquid components suitable as adhesion promoters for powdered materials are, for example, nonionic surfactants or aqueous solutions of surfactants or other detergent components. According to one preferred embodiment of the present invention, a fragrance can be used as a liquid component to promote adhesion between the finely divided powdered material and the coarse particles.

Other Detergent Ingredients According to one preferred embodiment of the present invention, in addition to the aforementioned components (surfactant, builder and disintegrant), the detergent tablets of the present invention comprise a bleach, a bleach activator, Other representatives selected from the group consisting of enzymes, fragrances, fragrance-containing substances, fluorescent agents, dyes, antifoaming agents, silicone oils, anti-redeposition agents, optical brighteners, decolorization inhibitors, dye transfer inhibitors and anticorrosives It may contain a typical detergent component.

Bleaching Agents, Bleaching Activators and Bleaching Catalysts Among the bleaching compounds that produce hydrogen peroxide (H ₂ O ₂ ) in water, sodium perborate tetrahydrate and sodium perborate monohydrate Things are particularly important. Other useful bleaching agents are, for example, sodium percarbonate, peroxypyrophosphate, citrate perhydrate and hydrogen peroxide producing persalts or peracids, such as perbenzoates, peroxophthalates, Diperazellaic acid, phthaloiminoperic acid or diperdocanedioic acid.

In order to improve the bleaching action when washing at a temperature of 60 ° C. or lower, the bleaching activator can be incorporated alone or in the form of a mixture. Bleach activators which can be used are the perhydrolysis (perhydro lysis) conditions, aliphatic peroxocarboxylic acids, preferably C _{1 ~ 10} (preferably C _{2 ~ 4)} aliphatic peroxocarboxylic acids and / or Or compounds which form unsubstituted or substituted perbenzoic acids. Substances containing O- and / or N-acyl groups and / or unsubstituted or substituted benzoyl groups having the stated number of carbon atoms are preferred. Suitable bleach activators include polyacylated alkylenediamines, especially tetraacetylethylenediamine (TAED)
, Acylated triazine derivatives, especially 1,5-diacetyl-2,4-dioxohexahydro
-1,3,5-triazine (DADHT), acylated glycoluril, especially tetraacetylglycoluril (TAGU), N-acylimide, especially N-nonanoylsuccinimide (NOSI), acylated phenolsulfonate, especially n-nonanoyl or Isononanoyloxybenzenesulfonate (n- or iso-NOBS), carboxylic anhydrides, especially phthalic anhydride, acylated polyhydric alcohols, especially triacetin, ethylene glycol diacetate, and 2,5-diacetoxy-2,5- Hydrofuran and the like can be mentioned.

In addition to or instead of the usual bleach activators, so-called bleach catalysts can be introduced into the tablets according to the invention. Bleach catalyst refers to a salt or complex of a transition metal that enhances bleaching, such as a manganese-, iron-, cobalt-, ruthenium- or molybdenum-selenium complex or carbonyl complex. In addition, manganese complexes, iron complexes, cobalt complexes, ruthenium complexes, molybdenum complexes, titanium complexes, vanadium complexes, copper complexes, and the like containing a nitrogen-containing tripod ligand, and cobalt-, iron-, copper-, and ruthenium- Amine complexes can also be used as bleach catalysts.

Enzymes Suitable enzymes are selected from the group consisting of proteolytic enzymes (proteases), lipolytic enzymes (lipases), starch hydrolases (amylases), cellulases and mixtures thereof. Particularly preferred enzymatically active ingredients are those obtained from bacterial or fungal strains, such as Bacillus S.
ubtilis), Basillus licheniformis, Streptomyces gtiseus and the like. Subtilisin-based proteolytic enzymes are preferably used and Bacillus lentus (Bacillus l.
entus) are particularly preferred. Of particular interest in this connection are enzyme mixtures, such as mixtures of proteolytic enzymes and starch hydrolases, mixtures of proteolytic enzymes and lipolytic enzymes, mixtures of proteolytic enzymes and cellulases, and cellulases. Examples thereof include a mixture of a lipolytic enzyme, a mixture of a proteolytic enzyme, an amylolytic enzyme and a lipolytic enzyme, and a mixture of a proteolytic enzyme, a lipolytic enzyme and a cellulase. Particularly preferred is a mixture containing cellulase. In some cases, peroxidases (peroxidases) and oxidases (oxidases) have also proven suitable.

The enzyme can be adsorbed on a carrier material and / or embedded in a coating material, thereby protecting the enzyme from premature degradation. The proportion content of enzymes, enzyme mixtures or enzyme granules may be, for example, about 0.1 to 5% by weight, preferably about 0.1 to 2% by weight, based on the tablet weight.

Soil Release Agent Further, the detergent tablet of the present invention can contain a component (so-called soil release agent) which promotes the removal of grease from textiles during washing. This accelerating effect is particularly evident when the textiles already containing such a fat-soluble component and already repeatedly washed with the detergent tablet of the present invention become soiled. Suitable oils and fats dissolving components include nonionic cellulose ethers such as methylcellulose and methylhydroxypropylcellulose (15 to 30% by weight of methoxy groups and 1 to 15% by weight, based on the amount of nonionic cellulose ether, respectively). (Including hydroxypropyl groups), and known phthalic acid and / or terephthalic acid polymers and their derivatives, especially polymers of ethylene terephthalate and / or polyethylene glycol terephthalate and their anionic and / or nonionic modified derivatives. You. Of these, the sulphonated derivatives of phthalic acid and terephthalic acid polymers are particularly preferred.

Fluorescent Whitening Agent The tablet of the present invention can contain a derivative of diaminostilbene disulfonic acid or an alkali metal salt thereof as a fluorescent whitening agent. Suitable optical brighteners are, for example, salts of 4,4′-bis- (2-anilino-4-morpholino-1,3,5-triazinyl-6-amino) stilbene-2,2′-disulfonic acid Or a compound having the same structure and having a diethanolamino group, a methylamino group, an anilino group or a 2-methoxyethylamino group instead of the morpholino group. Substituted diphenylstyryl type brighteners can also be used, such as 4,4'-bis- (2-sulfostyryl) biphenyl, 4,4'-bis- (
4-chloro-3-sulfostyryl) biphenyl or 4- (4-chlorostyryl) -4 '-(2
-Sulfostyryl) biphenyl alkali metal salts are exemplified. Mixtures of the above whitening agents can also be used.

Dyes and Fragrances In accordance with the present invention, dyes and fragrances are added to detergent tablets to improve the aesthetic effect formed by the product, thereby providing the consumer with only the required laundry properties. Instead, it is possible to provide a product that is "typical and does not cause failure" visually and sensuously. Suitable fragrance oils or fragrances include perfuming compounds, such as esters,
Examples include ether, aldehyde, ketone, alcohol and hydrocarbon-based compounds. Representative of ester-based flavoring compounds are benzyl acetate, phenoxyethyl isobutyrate, pt-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethyl methylphenyl glycinate , Allylcyclohexyl propionate, styralyl propionate and benzyl salicylate. As ether-based perfuming compounds,
Benzyl ethyl ether is exemplified. 8 to 1 as aldehyde-based perfuming compounds
Examples include linear alkanals having 8 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial, burgeonal and the like. Suitable ketone-based compounds are ionone, α-isomethylionone and methylseryl ketone. Examples of alcohol compounds include anethole, citronellol, eugenol, geraniol, linalool, phenylethyl alcohol, terpineol and the like. Examples of the hydrocarbon compound mainly include terpenes such as limonene and pinene. Preferably, however, a mixture of different fragrances is used, which together produce an attractive aroma. Such perfume oils can include natural flavor mixtures such as those obtained from plant sources, examples of which include pine oil, citrus oil, jasmine oil, patchouli oil, rose oil, ylang ylang oil and the like. . Preferred are cleary sage oil, chamomile oil, clove oil, balsam oil, mint oil, cinnamon oil, lime-blossom oil, juniper berry oil, vetiver oil, olive oil, galbanum oil, labodanum oil, orange brossam oil , Neroli oil, orange peel oil, sandalwood oil and the like.

The detergent tablet of the present invention usually contains less than 0.01% by weight of a dye, and the fragrance (perfume oil) can be constituted in an amount of about 2% by weight of the whole tablet.

The fragrance can be incorporated directly into the tablets of the present invention. In another advantageous embodiment, the fragrance is applied to a carrier that enhances the attachment of the fragrance to the laundry, and the slow release of the fragrance ensures long-lasting perfume on the laundry. . An example of a suitable carrier material is cyclodextrin, in which case the cyclodextrin-perfume complex can be coated with other auxiliaries.

[0073] According to the coloration present invention can be colored detergent tablet of the present invention with a suitable dye to improve the aesthetic appearance of the tablet. Suitable dyes can be selected without difficulty by those skilled in the art, which exhibit high storage stability, are not adversely affected by other ingredients and light in the tablet detergent, and have a It does not show significant dyeability and therefore does not dye such fibers.

Since the tablets of the present invention are multi-phase detergent tablets, the coloring of each phase is very important in emphasizing the differences in their active properties. Such coloring effects and the corresponding coloring effects of tablets are widely known, for example, from the literature on tooth cleaning compositions.

Specific Method of Manufacturing Tablet The tablet of the present invention is manufactured as follows. First, the components of each phase, which can be fully or partially pre-granulated, are dry mixed and then
The resulting mixture is formed / molded, especially tableted, in a conventional manner for the manufacture of multiphase tablets. To make the tablet of the present invention, the tablet is compressed between two punches of a die,
Form a solid compact. This process (hereinafter referred to as tableting processing for simplicity).
) Comprises four stages: metering, compression (elastic deformation), plastic deformation and ejection.

The tableting process can be carried out on a commercial tableting press, which is generally equipped with single or double punches. In the latter case, not only is the upper punch used to form the compression force, but the lower punch also moves toward the upper punch during the tableting process, and the upper punch compresses downward. For small-scale production, an eccentric press for tablets is preferably employed. In this press, a punch is fixed to an eccentric disk, which is mounted around a shaft that rotates at a predetermined speed. Such a punch movement is comparable to the operation of a normal four-stroke engine.
Tableting can be performed by upper punch and lower punch, but some punches
It can be fixed to a single eccentric disk, in which case the number of die holes is correspondingly increased.
The throughput of the eccentric press can vary from several hundred up to 3,000 tablets / hour, depending on the type.

For large-scale production, a rotary tablet press is generally employed. In a rotary tablet press, a relatively large number of dies are arranged on a circular die table. The number of dies varies between 6 and 55, depending on the model, but more dies are commercially available. The upper punch and the lower punch communicate with each die on the die table, and the tablet compression force is effectively formed by both the punches as well as the upper punch or the lower punch as described above. The die table and punch move about a common vertical axis, and the punch is carried by a rail-like cam track during rotation to the filling, compression, plastic deformation and dispensing stages. In locations where a large die up or down movement is required (filling, compressing, discharging), such cam tracks are supported by additional low pressure members, low tension rails and discharge channels. The die has a fixed feeding device (
This device is connected to a storage container for the premix. The compression force on the premix can be adjusted independently via the compression path by the upper and lower punches, the compression force being formed by the rotation of the shaft head of the punch through an adjustable pressure roller. .

For increased throughput, a rotary press with two or more filling shoes is used. For the production of two-layer or multi-layer tablets, several filling shoes are arranged in series and the lightly compressed first layer is not discharged before further filling. With certain suitable process controls, shell / bovine eye tablets having a structure similar to the laminated tablet and onion skin can be formed in this manner.
In the case of a shell / bovine eye tablet, the core layer or top surface of the core remains uncovered and therefore visible. Rotary tablet presses can also include forming tools such as single or multiple punches, such that, for example, an outer circle of 50 holes and an inner circle of 35 holes can be simultaneously used and compressed. it can. Modern rotary tablet presses have a throughput of over one million tablets per hour.

A tableting machine suitable for the present invention can be obtained from, for example, the following production companies. Apparatebau Holzwarth GbR, Asperg, Wihelm Fette GmbH, Schwarzenb
ec, Hofer GmbH, Weil, KIKIAN, Cologne, KOMAGE, Kell am See, KORSCH Press
en GmbH, Berlin, Mapag Maschinenbau AG, Bern (Switzerland) and Couroy N
.V. Halle (BE / LU). An example of a particularly suitable tablet press is the HPF 630 hydraulic double press (LA
EIS, D).

Specific Forms and Dimensions of Tablets Tablets can be manufactured in a given three-dimensional form and in a given size, but always consist of several phases, ie layers, inclusions or cores and rings. Suitable three-dimensional forms can take any form that can be easily handled, for example, bar forms, cubes, cuboids (blocks), corresponding forms with flat sides, especially circular A cylindrical form having a cross section or an oval cross section. This last embodiment encompasses from tablet form to compact cylindrical form with a height / diameter ratio of more than one.

In each of the above forms, a split compact can be formed of components that are separated from each other, each component corresponding to a predetermined dose of detergent. However, it is possible to design a compact in which several such units are combined in a single compact in a single compact, in which case smaller split units are used, in particular for setting a predetermined weak spot. It can be easily separated from the part. To use laundry detergent in a horizontal washing machine which is standard in Europe, it is advantageous to manufacture such a divided compressed product as a tablet in the form of a cylinder or a block, preferably, The diameter / height ratio is from about 0.5: 2 to about 2: 0.5. For the production of such compacts,
Commercially available hydraulic, eccentric and rotary presses are particularly suitable.

Another aspect of the three-dimensional form of the tablet of the present invention is that its dimensions are adapted to the detergent chamber of a commercial household washing machine, so that the tablet can be directly
That is, the tablet can dissolve during the water dispensing operation without the use of a weighing tool and can be weighed into the detergent dispensing chamber. However, it is of course also possible to use laundry detergent tablets with a measuring instrument.

Other suitable multiphase tablets that can be produced are tablets having a plate-like or slab-like structure with alternating thick and long portions and thin and short portions. Each part breaks at a predetermined break point (thin and short part), is broken off from the “polyphase bar”, and can be introduced into the washing machine. Also, the principle of this "bar" of laundry detergent can be embodied in other geometries, for example, a vertical triangle which joins each other only at one of their longitudinal sides. In this case, for visual reasons, the parts are preferably interconnected as one phase, while the vertices form the base of the triangle by forming the second phase. In this embodiment, two different colors are particularly attractive.

Destruction resistance of cylindrical tablets After compression, the detergent tablets show high stability. The fracture resistance of the cylindrical tablet can be determined from the diametral fracture stress. This is given by the equation: σ = 2P / πD
It can be calculated by t. In the formula, σ is the fracture stress in the diameter direction (DFS, Pa), P is the force (N) at which the tablet is broken by compression, D is the diameter of the tablet (m), and t is its height It is.

Example A surfactant-containing granule is mixed with post-treatment ingredients in powder form to prepare a premix, which is compressed by a Korsch tablet press to produce a two-phase detergent tablet. did. Surfactant-containing granules 1, 2 and 3 were produced in a 130 liter plow blade mixer (Gebrueder Loedige, Paderborn) and then dried in a fluid bed dryer. After sieving to remove the coarse particle fraction (1.6 mm) and the fine particle fraction (0.4 mm), the surfactant-containing granules were mixed with a paddle type mixer. The composition of the surfactant-containing granules is shown in Table 1 below.

[0086]

Table 1: Surfactant-containing granules (% by weight)

The two-layer detergent tablets were produced from a premix (granules containing surfactants + post-treatment components) by a Korsch rotary press, the first layer comprising 75% of the total amount of each tablet, the second layer Make up 25%. The diameter of the tablet is 44 mm.

Tables 2, 3 and 4 show the phase composition of the detergent tablets. The numerical value shown in each column of each table means the amount of the specific component of the specific phase in the tablet. That is, the sum of the values in each column is 100%. The total amount of a specific component in a tablet can be easily calculated from the proportion content of each phase of the tablet. The tablet weights were about the same but different weights (37.5 g ± 1%, slightly changed due to the premix feeding into the press die), the tablet hardness changed about 10%, and the disintegration time was
Changed about 5 seconds. The tablet hardness and disintegration time are given in the table below.

[0089]

[Table 2]: Detergent tablet composition (% by weight), physical property data *: Enzyme granules of proteolytic enzyme, cellulase, starch hydrolase and lipolytic enzyme, coated on starch carrier **: Repelotex SRP 4 = terephthalic acid / ethylene glycol, polyethylene glycol ester (Rhoene Poulenc) ***: Compression Cellulose (particle size: 90% by weight> 400 m)

[0090]

[Table 3]: Detergent tablet composition (% by weight), physical property data *: Compressed cellulose (particle size: 90% by weight> 400 m)

[0091]

[Table 4]: Detergent tablet composition (% by weight), physical property data *: Compressed cellulose (particle size: 90% by weight> 400 m)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Andreas Lietzmann D-44805 Bochum, Am Nordbad 88 (72) Inventor Klaus-Peter Tiessee D-D40593 Düsseldorf, Panne Beckerstrasse No. 16 (72) Inventor Gerhard Brazzey Germany Day-40599 Düsseldorf, Fürstenberger Strasse No. 21 (72) Inventor Christian Brock Germany Day-50733 Cologne, Wartburgplatz 12 (72) Inventor Fred Shamville, Germany Day 40789 Monheim, Niederstrasse 96 (72) Inventor Heinke Jevensd Federal Republic Day 40589 Düsseldorf, Ittstraße 35 (72) Inventor Hans-Friedrich Kluse Germany Day 41352 Korschen Bloich, Am Hallenbad 44 F-term (reference) 4H003 AB03 AB19 AB27 AC05 AC08 BA17 DA01 EA15 EA16 EA28 EB09 EB12 EB22 EB24 EB32 EB42 EC01 EC02 ED02 EE05 FA16 FA32

Claims (20)

[Claims] 1. A two-phase or multi-phase detergent tablet of a compressed granular detergent comprising a surfactant, a builder and optionally other detergent components, wherein the surfactant content of each phase of the tablet is based on the weight of each phase. The tablet is characterized by being changed in an amount of 3% by weight or less. 2. The difference in surfactant content between each phase is in an amount of not more than 2% by weight, preferably not more than 1.5% by weight, more preferably not more than 1% by weight, based on the weight of each phase. Tablet according to 1. 3. The tablet according to claim 1, wherein the surfactant content of each phase is the same. 4. The tablet according to claim 1, wherein the phase is in the form of a layer. 5. The tablet according to claim 1, wherein the surfactant is introduced into each of the phases by one or more surfactant-containing granules. 6. The tablet according to claim 5, wherein the same surfactant-containing granules are used in all of the phases. 7. The tablet according to claim 4, wherein said tablet has two layers containing the same surfactant-containing granules. 8. The tablet according to claim 1, wherein the surfactant is an anionic or nonionic surfactant. 9. The ratio of anionic surfactant / nonionic surfactant is 10
The tablet according to claim 8, wherein the ratio is from 1: 1 to 1:10, preferably from 7.5 to 1: 5, more preferably from 5: 1 to 1: 2. 10. The tablet according to claim 1, wherein at least one of the phases does not contain a nonionic surfactant. 11. The tablet according to claim 1, wherein at least one of the phases comprises an alkyl polyglycoside. 12. The tablet according to claim 1, wherein at least one of the phases does not contain an anionic surfactant. 13. The tablet according to claim 1, wherein the tablet is obtained by tableting a granular premix of at least one surfactant-containing granule and at least one powder-forming component to be subsequently mixed. Tablet described in Crab. 14. The tablet according to claim 13, wherein said granules are produced by conventional granulation methods, such as mixer and pan granulation, fluidized bed granulation, extrusion, pelletization or compression. 15. Tablet according to claim 13 or 14, wherein the granules have a particle size of 10-4,000 μm, preferably 100-2,000 μm, more preferably 600-1400 μm. 16. A tablet according to any of claims 13 to 15, wherein the subsequently formed powder-forming component has the same particle size distribution as the granules used. 17. The tableted premix has a bulk density of at least 500 g / l, preferably at least 600 g / l, more preferably more than 700 g / l.
The tablet according to any one of 13 to 16. 18. At least one of the powder-forming components to be subsequently mixed is a faujasite-type zeolite of less than 5 μm, said zeolite being at least 0.2% by weight, preferably at least 0.2% by weight of said premix to be compressed. 18. The tablet according to any one of claims 13 to 17, wherein the tablet comprises at least 0.5% by weight, more preferably more than 1% by weight. 19. The tablet may further contain a disintegrant, preferably a cellulosic disintegrant, more preferably a granular, cogranular or compressed cellulosic disintegrant, in an amount of 0.5 to 0.5 wt. 19. A tablet according to any of the preceding claims, comprising a dose of 10% by weight, preferably 3-7% by weight, more preferably 4-6% by weight. 20. The tablet further comprises a builder, a bleaching agent, a bleaching activator, an enzyme, a pH adjuster, a fragrance, a fragrance-containing substance, a fluorescent agent, a dye, an antifoaming agent, a silicone oil, a redeposition inhibitor, a fluorescent agent. The tablet according to any one of claims 1 to 19, comprising one or more substances selected from the group consisting of a whitening agent, a decolorization inhibitor, a dye transfer inhibitor, and an anticorrosive.