DE102009011928A1 - Process for the preparation of cleaning tablets - Google Patents

Abstract

The invention relates to a process for the preparation of cleaning tablets (1) using a base surfactant (2) having a surfactant content of at least 30 weight percent with the addition of sodium bicarbonate (3) and citric acid (4). According to the invention, slightly water-soluble cleaning tablets (1) having a high surfactant content are produced by milling citric acid (4) and sodium bicarbonate (3) in a ratio of their proportions in the cleaning tablet (1) to form a homogeneous mixture (5) and then mixing the homogeneous mixture (1). 5) and the base surfactant (2) are combined in granular form in the appropriate ratio and mixed together to form a compressed concentrate powder (6).

Description

The The invention relates to a process for the preparation of cleaning tablets using a base surfactant having a surfactant content of at least 30 weight percent with the addition of sodium bicarbonate and Citric acid.

Such a method is for example from the published patent application DE 10 2006 029 793 A1 known.

Of the The above document may be followed by cleaning tablets be prepared with a higher surfactant content than comparable cleaning tablets, the specified there the state of Technique correspond. When using an equal mass of a cleaning concentrate in tablet form may after the There cleaning process tablet produced a larger Use amount of water as cleaning volume, as those Cleaning tablets on which the above-mentioned document refers. Furthermore, due to the increased surfactant content on additional cleaning aids, such. For example phosphates, be waived.

To note here is that a further increase in the Tensidgehaltes adversely affect the solubility of a cleaning concentrate can affect in water, so that is expected to be alone through an increase of the surfactant content in the cleaning concentrate Do not automatically follow an increase in the cleaning performance of the cleaning concentrate becomes.

The The object of the present invention is a method for the preparation of a surfactant-based impressionable cleaning concentrate, with the said cleaning tablets can be produced, in comparison to the cleaning tablets of the prior art at the same Use of a predetermined mass of a tableted cleaning concentrate make a significantly increased amount of water usable as cleaning volume, the cleaning power of the cleaning volume and the solubility the cleaning tablet in water is at least the same and without having to solve the task on cleaning aids must be resorted to.

These Task solves the invention with the features of the main claim.

Out The invention has the advantage that despite the high percentage by weight on surfactants a good solubility in water is ensured. This advantage is achieved in that a surfactant granules before pressing to cleansing tablets with one of acid and gas releasing Ingredients existing homogeneous shower base is mixed, and so the granules after pressing as embedded ingredients the homogeneous effervescent base are present, the components of the Ground effervescent base according to the invention are.

The Invention has recognized that with increasingly finer degree of grinding the Density of grain of the effervescent powder is increased so that a large number of effervescent granules immediately come into contact with the surface of the granules can. With a corresponding set grinding degree can thus at Mix a dense occupation of the granule surface achieved with a surface-active substance - the effervescent base become. Upon contact with water, the surfactant unfolds Substance their effect in the cleaning tablet by the gas-releasing Ingredients by from the reaction with water gas bubbles emerge, which is embedded on the surface of the Surfactants impinge. In a sealed according to the invention Occupation of the surface of the surfactant granules act accordingly many gas bubbles directly on the granule surface and cause breakage of smaller surfactant particles from the surfactant granules. This will give a good solubility of the surfactant granules in water, even at a high surfactant level, reached.

accompanying with a fine effervescent powder is also a corresponding multilayered construction of the shower base achieved, which also advantageous acts on the solubility of surfactants, as the effervescent base Layer by layer in the water can react.

The Granular form of the surfactant granules may, for example, spherical be to have a favorable relationship of education of the Granule body in relation to its surface so that in terms of size the granules particles a relative large surface occupied by the effervescent powder can be.

Farther The fineness of the effervescent powder can be advantageous after milling be further increased by the ground effervescent powder is sieved to an even finer powder.

Of the acid component of the effervescent base can be made, for example, from citric acid, Succinic, tartaric or other acids, or mixtures of these, exist.

According to the invention, it is provided that sodium bicarbonate and citric acid are milled in the ratio of their proportions in the cleaning tablet to form a homogeneous mixture. This results in a fine homogeneous powder as a shower base whose property is particularly important for rapid and complete solubility of the embedded in the cleaning tablet surfactants in the water of importance.

About that In addition, acids typically have the property of a Acid component and can be used to set a low or mild pH of washing and cleaning fluids serve.

Farther the invention provides that the homogeneous mixture and the base surfactant combined in granular form in appropriate proportions and mixed together to a concentrate powder which then can be pressed into cleaning tablets.

Out The invention further provides the advantage that with the concentrate powder a pressable cleaning concentrate is created, which after the pressing process on the one hand regardless of the surfactant content the basic surfactant used a fast and complete Solubility of the cleaning tablet, even in cold water, on the other hand with increasing surfactant content in the base surfactant to a correspondingly increased potential cleaning performance of the cleaning concentrate leads.

So can according to the invention per used mass of pressed cleaning concentrate with increasing surfactant content in Base granulate a correspondingly larger amount Water volume can be used for cleaning purposes, with the larger amount Water can be sized so that the cleaning performance the original amount of wash water not only consistent is, but can even be improved.

Preferably a compressible base surfactant is used to improve the compressibility to support the concentrate powder.

So the concentrate powder can then even to cleaning tablets are pressed when the milled to the effervescent homogeneous powder such is finely ground that this has a powdery substance.

According to the invention without any restrictions arising from the concentrate powder resulting cleaning performance on cleaning aids, such. B. Phosphates or Trisatriumnitrilotriacetat be waived.

nevertheless can with a cleaning tablet according to the invention Water to be converted into cleaning fluid, with which surfaces are free of residues of cleaning agent residues can be cleaned.

Based on the weight of the base surfactant in granular form, the surfactant content in the base surfactant, preferably between 30% by weight and 90 percent by weight.

ever after application, the cleaning performance of the cleaning tablet pressed cleaning concentrate individually by means of appropriate selected surfactant content in the base surfactant can be adjusted.

The Cleaning tablets produced according to the invention can be used, for example, as window cleaner, paint cleaner, Car shampoo, household cleaners, industrial cleaners or the like be used. In particular, by the advantageous metering For example, cleaning tablets can also do this used in automated washing systems.

For a maximum cleaning power of pressed to the cleaning tablet Concentrate powder has the basic surfactant, based on its weight, a preferred surfactant level of 90% by weight.

Essential in this case, that by the method according to the invention Cleaning tablets can be produced with a particularly high proportion of surfactant are characterized by the high surfactant content, the solubility of Cleaning tablets in water, due to the achievable high grain density of effervescent powder, is not affected and high Potential cleaning performance of the cleaning concentrate takes place.

For the purpose of easy introduction of the cleaning tablet, for example through the opening of a cleaning container, it is proposed that the volume of the pressed cleaning tablet is less than or equal to 1.5 cm ³ .

It It has been found that the consistency of the concentrate powder advantageously improves when the process of mixing to concentrate powder in terms of natural air pressure under increased Printing done.

For this is further suggested that the process of mixing for Concentrate powder is carried out so that respect the individual components a homogeneous concentrate powder is formed.

This process can be supported, for example, by adding the base surfactant in granular form already during the current process of grinding to a homogeneous mixture with this in corresponding ratio is merged.

in this connection it is envisaged that the process of grinding to a homogeneous mixture with a minimum degree of approval, so that a complete Dissolution of the base surfactant takes place in granular form. The Total surface of the surfactant granules is through the grinding process further enlarged, leaving even more attack surface for the gas bubbles emerging from the shower base consists.

Of the This achievable advantage is that on the one hand, the consistency the concentrate powder, so the molding compound, is further improved and on the other hand, the solubility of the surfactants from the pressed Cleaning tablet is even better supported.

moreover An improved consistency of the concentrate powder may be favorable act on its compressibility.

The pressed cleaning tablet has in a preferred embodiment based on their weight, a surfactant content of 65 percent by weight on.

The Pressed cleaning tablet can be based on its weight, for example from 55 to 85% by weight of granulated base surfactant, from 10 to 30 weight percent citric acid and 2 to 18 weight percent Sodium hydrogen carbonate exist.

Preferably the cleaning tablet can also be made from 65 to 75% by weight of granulated base surfactant, from 15 to 25 Weight percent citric acid and 7 to 13 percent by weight Sodium hydrogen carbonate exist.

In In a preferred embodiment, the cleaning tablet based on their weight of 72% by weight of granulated base surfactant, 18.8% Weight percent citric acid and 9.2 weight percent Sodium bicarbonate.

So may be 3.5 grams of the invention produced and tableted cleaning concentrate dissolved in water Make 9 liters of ready-to-use cleaning fluid. The pH of this use concentration can be between about 5.5 and 6.0 are.

by virtue of of linear relationships, for example, give 2.5 Grams of pressed concentrate powder then about 6.5 liters of ready-to-use cleaning fluid.

Per mass used a produced according to the invention Cleaning tablet is thus converted about 10 times more water in cleaning liquid, than this with the prior art tabs of the prior art same mass is possible.

optional Color pigments and / or fragrances may also be the concentrate powder be mixed.

in the The invention will be described below with reference to exemplary embodiments explained in more detail.

It demonstrate:

1 a schematic representation of the method according to the invention;

2 a sectional view of the concentrate powder in an enlarged view;

3 a single granule particle having a surface occupied by the homogeneous effervescent powder mixture;

4 the granules gem. 3 at finer freeness of the homogeneous mixture;

5 a sectional view of pressed to the cleaning tablet concentrate powder;

Provided not otherwise stated below, the following description applies always for all characters.

The figures show a process for the preparation of cleaning tablets 1 using a base surfactant 2 with a surfactant content of at least 30 percent by weight with the addition of sodium bicarbonate 3 and citric acid 4 ,

Especially 1 shows that the citric acid 4 and the sodium bicarbonate 3 in proportion to their proportions in the cleaning tablet 1 to a homogeneous mixture 5 be ground.

The homogeneous mixture 5 and the base surfactant in granular form are combined in an appropriate ratio and together to form a concentrate powder 6 mixed.

In 1 is shown that the concentrate powder 6 then to cleaning tablets 1 is compressible. Furthermore, there is shown that the pressing process can be done for example by Matrizenstempelpaaren.

With the homogeneous mixture 5 a fine-grained powder is created as an effervescent base in which the base surfactant 2 after the mixing and pressing is embedded. This situation is particularly in 2 shown.

With increasingly finer freeness becomes the density of the grain of the homogeneous mixture 5 - So the effervescent powder - increased so that as many grains of the homogeneous mixture 5 with the surface of the granule particles of the base surfactant 2 come in contact.

This shows 3 a granule particle of the base surfactant 2 which is occupied by a plurality of grains of the homogeneous mixture. In addition to 3 shows 4 in that in the case of a fine-grained ground homogeneous mixture 5 even more grains on the surface of the base surfactant 2 can start.

According to the invention, a dense population of the surface of the base surfactant 2 made possible with a surface-active substance. Upon contact with water, the effervescent base of the cleaning tablet unfolds 1 their effect by gas bubbles emerge and impinge on the surface of the embedded surfactants. In particular from the 1 and 2 it is understandable that in the case of an inventively attainable dense occupation of the surface of the base surfactant 2 a corresponding number of gas bubbles can act on the surfactant surface, so that smaller surfactant particles can break out of the surfactant granules. As a result, even at an extremely high surfactant content of the base surfactant 2 achieves a good solubility of the surfactants in water and thus a high cleaning performance without further aids.

With the method according to the invention, cleaning tablets can be prepared whose surfactant fraction is based on the surfactant concentration in the base surfactant 2 is determined, wherein according to the invention regardless of the surfactant concentration in the base surfactant 2 the contained surfactants in the cleaning tablet 1 can be easily and quickly dissolved in water.

In the embodiments it is shown that for the base surfactant 2 a spherical granule is used. In this way, an advantageous ratio of the granule body volume is achieved with respect to its surface, so that with respect to the formation of the granules as much as possible contact surface for the grain of the homogeneous mixture 5 is available.

In particular in 5 is a sectional view of the cleaning tablet 1 pressed concentrate powder 6 shown. The granules of the base surfactant 2 touch each other point by point and are pressed together in these places to form a composite. The granules form intermediate spaces in which the homogeneous mixture 5 located. On the one hand receives the cleaning tablet 1 a solid shape and on the other hand, there is a sufficiently large contact surface for the plurality of grains of the homogeneous mixture to the granule beads. Even if the homogeneous mixture has a powdery substance, the high-integrity cleaning tablet may be made of the concentrate powder 6 be pressed.

The consistency of the concentrate powder 6 can be further improved if the process of mixing the concentrate powder 6 with respect to the natural air pressure under increased pressure.

For this purpose, in the example shown in FIG 1 the mixing to the concentrate powder 6 carried out within a pressurized container.

A further improvement in the consistency of the concentrate powder 6 can be achieved in which the basic surfactant 2 in granular form already during the ongoing process of grinding to a homogeneous mixture 5 is merged with this in appropriate proportion.

Especially if the basic surfactant 2 already during the grinding process the homogeneous mixture 5 is fed, the grinding process according to the invention is carried out with a Mindestmahlgrad, so that a complete dissolution of the base surfactant 2 in granular form. The total surface of the base surfactant 2 in granular form is further enlarged by the grinding process, so that a correspondingly larger surface attack surface for under water from the homogeneous mixture 5 emerging gas bubbles is present.

To the this will further enhance the consistency of the concentrate powder improved and on the other hand, the solubility of in of the pressed detergent tablet surfactants present in water favorably supported.

Furthermore, the process of mixing becomes the concentrate powder 6 executed in the embodiment shown so that with respect to the individual components of a homogeneous concentrate powder 6 arises.

According to the invention, per inserted mass of the pressed concentrate powder 6 to the appropriate cleaning tablet 1 with increasing surfactant content in the base surfactant 2 a correspondingly larger amount of water are used for cleaning purposes, wherein the cleaning performance of the recovered wash water compared to the smaller amount of wash water is at least the same.

Starting from a preferred surfactant content of 30 percent by weight to 90 percent by weight in the base surfactant 2 , based on its weight, so each cleaning tablets 1 be prepared individually for predetermined amounts of water.

The volume of the pressed cleaning tablet 1 is not greater than about 1.5 cm ³ in the examples shown.

The cleaning tablet 1 has a diameter of about 18 mm in the illustrated embodiments and is about 6 mm thick.

Such a sized cleaning tablet 1 For example, it can easily be added to a liquid container of a windscreen washer system of a motor vehicle.

It is further provided that for maximum cleaning performance of the cleaning tablet 1 a basic surfactant 2 is used, which has a preferred weight fraction of 90 percent based on its weight.

Based on the weight of the cleaning tablet 1 , this may have a surfactant content of 65 weight percent here.

According to the invention created a cleaning concentrate based on a high surfactant content, whereby at a high achievable cleaning performance on cleaning aids can be waived.

In the embodiments shown results in a 3.5 gram cleaning tablet 1 9 liters of ready-to-use cleaning fluid.

Of the pH of this use concentration, for example, between 5.5 and 6.0 are.

Due to linear relationships yield 2.5 grams of the pressed cleaning tablet 1 6.5 liters of ready-to-use cleaning fluid.

With a cleaning tablet produced according to the invention 1 of predetermined mass, therefore, about ten times more water is converted into cleaning liquid than in the abovementioned tabs of the prior art, of the same mass as the predetermined mass of the cleaning tablet 1 , is possible.

The cleaning tablet 1 may, for example, based on their weight from 55 to 85 weight percent granulated base surfactant 2 , from 10 to 30% by weight of citric acid 4 and 2 to 18% by weight sodium bicarbonate 3 consist.

Preferably, the cleaning tablet 1 based on their weight from 65 to 75 weight percent granulated base surfactant 2 , from 15 to 25% by weight of citric acid 4 and 7 to 13 percent by weight sodium bicarbonate 3 consist.

In the illustrated embodiments, the cleaning tablet 1 based on their weight of 72 percent by weight granulated base surfactant 2 , from 18.8% by weight of citric acid 4 and 9.2 weight percent sodium bicarbonate 3 ,

Optionally, for example, during the mixing process to the concentrate powder 6 Color pigments and / or perfumes are admixed, for example, each cleaning tablets 1 to color for predetermined amounts of water of different sizes.

As the cleaning effect of getting out of the cleaning tablet 1 resulting washing water is determined exclusively by the surfactant concentration in the base granules, the cleaning of surfaces is carried out particularly environmentally friendly and without residues of detergent residues.

In addition, the cleaning of surfaces by means of the cleaning concentrate according to the invention can be carried out to be gentle on the surface, so that there is a versatile field of application of such cleaning tablets 1 results, for example, for cleaning painted surfaces, glass surfaces or other scratch-sensitive surfaces.

Based on a predetermined as cleaning or washing water amount of water, the cleaning tablets 1 be formed as each separate individual elements. Likewise, it is also possible to form cleaning tablets, or compacts, in such a way that a plurality of such individual elements in a cleaning tablet 1 are involved, in particular by predetermined predetermined breaking points easy separability of portioned individual elements is provided.

It is advantageous if the cleaning tablets 1 secured against moisture. For this purpose, the cleaning tablets 1 For example, be packaged in blister packs air and moisture-proof.

through Blister packs may be the cleaning tablets For example, be applied without skin contact advantageous.

1

cleaning tablet

2

base surfactant in granular form

3

sodium

4

citric acid

5

homogeneous mixture

6

concentrate powder

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 102006029793 A1 [0002]

Claims (13)

Process for the preparation of cleaning tablets ( 1 ) using a base surfactant ( 2 ) having a surfactant content of at least 30 percent by weight with the addition of sodium bicarbonate ( 3 ) and citric acid ( 4 ), characterized in that citric acid ( 4 ) and sodium bicarbonate ( 3 ) in proportion to their proportions in the cleaning tablets ( 1 ) to a homogeneous mixture ( 5 ) and that the homogeneous mixture ( 5 ) and the basic surfactant ( 2 ) are combined in granular form in a corresponding ratio and together to form a concentrate powder ( 6 ) which is subsequently added to cleaning tablets ( 1 ) is compressible. Method according to claim 1, characterized in that the base surfactant ( 2 ) in granular form, a surfactant content of 30 weight percent to 90 weight percent, based on the weight of the base surfactant ( 2 ), having. Method according to one of claims 1 to 2, characterized in that the volume of the pressed cleaning tablet ( 1 ) is less than or equal to 1.5 cm ³ . Method according to one of claims 1 to 3, characterized in that the process of mixing to concentrate powder ( 6 ) with respect to the natural air pressure under increased pressure. Method according to one of claims 1 to 4, characterized in that the process of mixing to concentrate powder ( 6 ) is carried out so that with respect to the individual components a homogeneous concentrate powder ( 6 ) arises. Method according to one of claims 1 to 5, characterized in that the pressed cleaning tablet ( 1 ) has a surfactant content of at least 65 percent by weight based on its weight. Method according to one of claims 1 to 6, characterized in that the base surfactant ( 2 ) in granular form already during the ongoing process of mixing to a homogeneous mixture ( 5 ) is merged with this in appropriate proportion. A method according to claim 7, characterized in that the process of grinding to a homogeneous mixture ( 5 ) with such a minimum degree of degree that a complete dissolution of the base surfactant ( 2 ) takes place in granular form. Method according to one of claims 1 to 8, characterized in that the pressed cleaning tablet ( 1 ) based on their weight from 55 to 85% by weight of granulated base surfactant ( 2 ), from 10 to 30% by weight of citric acid ( 4 ) and 2 to 18% by weight of sodium bicarbonate ( 3 ) consists. Method according to one of claims 1 to 9, characterized in that the pressed cleaning tablet ( 1 ) based on their weight from 65 to 75% by weight of granulated base surfactant ( 2 ), from 15 to 25% by weight of citric acid ( 4 ) and 5 to 13 percent by weight of sodium bicarbonate ( 3 ) consists. Method according to one of claims 1 to 10, characterized in that the pressed cleaning tablet ( 1 ) based on their weight of 72 percent by weight of granulated base surfactant ( 2 ), from 18.8% by weight citric acid ( 4 ) and 9.2 weight percent sodium bicarbonate ( 3 ) consists. Method according to one of claims 1 to 11, characterized in that the base surfactant ( 2 ) in granular form has a surfactant content of 90 weight percent. Method according to one of claims 1 to 12, characterized in that 3.5 grams of a pressed cleaning tablet ( 1 ) dissolved in water give 9 liters of ready-to-use cleaning liquid.