DE1811364A1 - Powder and process for its production and device for carrying out the process - Google Patents

Description

? ^ £ _3 ^^ _ ^ S £ i§ & £ §S_2L ^l _ ^ - §5 sen_Her et ell] jji £; _ as well as apparatus for carrying out this procedure

Ϊ "· ii '' ^ w ΐΐΐΐ b4 C * ΐ-ΐ ivmi « Μ * ΐ «νΐ S ** Zip * SiS ΐ — ΐ ΐρΐ ^ ΐ * ΐΖ * ΐ-ΐ ΐΐ ΐϊΐ ΐ ^ ΐ ϊίίί · ΐΐ ΐΐ ΐϊρΐ ϊ ^ ΐ S ^ t ϊ ^ ί S3 * ™ 5 ΐΐ ^ mm Su ** Vn * 53 "■ · Ϊϊ2 a ^ S ^ * φ CHv! 2fc w3% ΐϊΐ ΐΐν £ ■ * ΐΐΐ

The invention relates first to a powder and relates in particular to a powder for Ilaut care, v / ie, for example TalcuBi powder or the like.

The invention beaieht continues to a process for the preparation of powders, in particular for the production on an industrial large scale, mid Txbrifft particularly to such a method for producing such a powder, as can ζυ.τ use for the care and treatment of the skin. In particular, the invention relates to a large-scale industrial application that can be used, by means of which powder of the type described and, preferably, Tolcuri powder, in particular

009826/1359

BANK ACCOUNT DRESDNER BANK AQ, TRANKFURT AM MAIN NO. Ϊ80550 CHECK ACCOUNT NO. S8S56O FRANKFURT A

let create moisture-repellent talc powder.

Finally, the invention also relates to a device to carry out the described procedure.

It is particularly advantageous to use a powder for protection, the care, smoothing and treatment of the skin to be preserved and used that is precisely defined possesses physical characteristics. ■

A first desirable trait resides in such a way extremely low grain size with such a small grain size distribution difference, that is, preferably with a grain size distribution curve, in which the amount of the individual grain size classes is plotted against the grain size, with a predominant range · practical same or only slightly different grain size, amount that you have practically a homogeneous and 'very fine product, due to the small grain size and the even grain size distribution increases the greasiness properties, not only because of which talc was impaled for the purposes mentioned but also its opacity and its ability to to protect without causing the pores to close.

A second characteristic is an increased surface tension, which means that the powder does not have any moistening properties and give him an 'excellent ability to repel moisture Isolation of the covered and thus protected surface.

The invention is based on the object of creating a powder which has these properties in previously known Powder shows incomplete perfection.

BAD OBIGiNAL 909828/1359. --5 -

_ 7, - - y -

The invention is characterized in that the individual Particles of powder material from a skin are less Thickness, for example the order of magnitude of only a few molecules, of a moisture-repellent agent are uugebeii. A particularly advantageous development the invention is characterized in that the moisture-repellent putty formed by dos Skin is only one molecule thick. An embodiment has also proven to be particularly advantageous ■ the .invention proved, in which the powder material a has a porous structure with which the moisture-repellent Kittel is in intimate mixing.

According to a further idea of the invention, a powder is characterized in that it has a particle size distribution of the powder material with a practically horizontal distribution curve in its mean !! Has area and small grain size in their edge areas. A powder can be used with particular advantage, in particular for the purposes of protection, care, smoothness and treatment of the skin, which is characterized by a particle size distribution that is predominantly in the range between the grain sizes of 10 microns and 0.1 microns is.

The final lies beyond. the task is based on a process :! ^ vr production of a powder zv. create, the cicl. in co c special for body care or i'lm.- ~ liclie :: Z - \; ecl: c: i is suitable for uiic. has the properties described to a high degree, the invention is further aimed at using this process to create a powder EU in which the o.ic jec-chriocene characteristics are v: ruirl: licat in the same way as c.as previously known in pj .derii was not the Ü'all.

909826 / Ί359 "

This further, the invention z-ugrun.de lying task is achieved in that the powder material or "an industrial raw material in the raw state in a suitable Relationship with a lack of activity Means is mixed. It aim to repel moisture Material paraffin in the form of granules or fine schnitzels are used. Subject to a further inventive idea is the powder material mixed with the moisture-repellent agent in Moved further in the form of a flowable stream and introduced into a fine grinding device. this can expediently on a pneumatic Vege and in a fine grinder that works with rotating grinding elements be effected in the direction.

The solution according to the on a device for implementation This method directed inventive concept is characterized in that such a device a liquefaction chamber and a device for charging this chamber with powder material in the raw state as well as with a moisture-repellent agent in the form of granules or small chips, Furthermore, one or more fans, by means of which warm or hot air can be supplied to the liquefaction chamber, and a fine comminuting device with vane-shaped rotating at very high speed Grinding elements, in which the powder material and the Flowable bed containing granules of the moisture repellent agent absorbable and through violent Air turbulence reduces the grain size of the powder material to a finely divided state as well as the covering of these granules of powder material by the moisture-repellent smock in a very small layer thickness can be achieved, as well as a'Zyklon-

- 5 -
909826/1359

Separation device for the classification of the powder material after its passage through the Peinzerkleinerungseinrichbung having.

The IT shredding device used in rumi can preferably be used be of the type which has a cylindrical casing in which there is very great speed at intervals ii.gereinacljn.er ebagen-like arranged and preferably from one another by means of partitions Rotate separate Jjcliaufel rotors.

The powder material mixed with the moisture repellant is placed in a liquefying cap. The term "liquefaction can" is understood to mean that it is a device in which the powder material and the f euohti ;; l: eibnabweir> eiido Hittel ge: .ieij-3ar ·· in -'lon state be brought to a flowable position, do.ü means in νί'.ιοη. such a Ziurband, in which the mixture behaves something like oiuo I -'lünsigkeit, because rope ''. o a :: a particle froi .i'olative to each other are possible. Di »'· : .O3 flowable odor also be denoted as i'liclmeto Ge: rice ¹ · is preferably conveyed further on the natural and under pressure in the

-Advantageously, the device can be designed according to the invention so that the particle size of the Fuder- ■ aaterials so ^ / em-i ^ ge. ^ Bax lot ¹ in that the IZorngrößenverbeilungskurve aufwoic a predominant area practically the same Korngrößeiuionge t. i / cmor can after a WC-IbCr (SI- InventiLng.'j ;; o: lanI: eii die dicTl.voi'ordernie air beforehand a Sterilisnbioi, which suffered on thermal Ucgo or ι οίε a passage through eiLic.- n. not done with ultraviolet rays arboitencencen apparatus.

The feuchtigljibaabv / oiscndo smock is preferably formed by a lTrai'fi: x, dac the ^J uderraate: raal, for example the Tnlcujti in I ¹ Om of chips or small granules

yUbö ^ b / Ubb BAD ORIGINAL.

- f _ ~ J -

is added and mixed with these. The one that promotes the mixture Air is in the chamber in which the formation of the flowable or flowable layer takes place, in one of the Melting temperature of the paraffin adjacent and preferably slightly higher temperature supplied '. '

At the outlet d < ^r : r! '' Of an acloiner unit, the gaseous carrier stream entailing the mixture is introduced into a zvklon separating unit in which the larger. Particles are whirled up and fed back into the circuit breaker.

The method according to the invention makes it possible to produce powders in which the :: c - i particles e :: trom are small. It tears the pneumatic B'oirizerkleinermigsoinrichfcung used according to the invention the powder in suspension in the raw state and in the gaseous carrier stream violent vortex-like movements with which very quickly a 'separation of the powder grain and its advancing. ZJox-f'all to a finely divided and distributed state, in which the particle attains the desired dimensions on the order of about 10 to 5 ') kikroii.

C-easily becomes through; i.io invention of cohesion ■ the moisture-repellent agent, for example Paraffins, which by the temperature of the gaseous carrier medium, in-which it is contained in-liquid State, quickly separated into the smallest droplets, the superficial the talc'.imbeilchon changing clothes and applying a surface film pra.:-· just about the thickness of just one hole]: '. · Is form. "

At the same time, it becomes an e: -rbrer.i fine and even divided powder is obtained, whose grain size '' 'also depends on the throughput time in the crushing device can be regulated, whereby the changes in the throughput time by means of action on the per unit of time measured flow rate of the gaseous carrier stream be obtained, which gives the powder at the entrance and exit of the Feinaerkleinerungseinrichtung the kinetic energy.

909826 / 13S9

„ _V BAD ORIGINAL

According to a modification of the invention, which can be used as an alternative or in addition, that powder material is in its raw state before it is in füeß.baren oil ^? orn is introduced into the shredding device, subjected to a treatment in order to bring about an intimate concentration of the powder particles and the particles of moisture;

The powder material, in its raw state, is suspended in a liquid which is formed from a solvent which contains the moisture-repellent product in solution. For example, the raw talc powder is incorporated into a solution of paraffin in dichloroethane in a suitable ratio. The ilinching is then introduced into a device known as a nebulization apparatus, in which the ilatorium is separated into a wolkon-like ilontinuum, which is burnt from one another and suspended from one another. Diener Yomobel ^ uigGopparat is formed ch du3? One held at a high temperature Hanger, \ ^r granted 'droplets is very fine in the uelche Ger.iisch in Pom (-inen make love odr-r introduced. Under the effect of the ruling in the Raun. Temperature which is dimensioned so that the boiling point of the solvent is not tolerated, and due to the increased contact surface with de:., Gaseous liedium, the solvent evaporates immediately. It is removed from the nebulization chamber and then circulated into a new one Each droplet is brought back into fenten Gustand and forms a granule with smaller dimensions and a porous structure compared to the dimensions of the initial droplet, in that the talc and the moisture-repellent agent, for example paraffin, are intimately mixed with one another Its poroeei: structure is the powder grain: i: icc ':. in its raw state is light and can easily cht to be further forwarded, furthermore it is according to the already

_ ₈ _ 909826/1359 BAD

described Feiiizerkleinerungseinrichtung equally easily "and conveniently break into pieces and of fine size reduce to the appropriate grain size.

Further features of the invention emerge from the following description and the claims, wherein in the following the invention in one embodiment of the method for the production of powder, especially for skin care, such as talc powder or the like, is described in more detail purely for example, which in turn is explained in more detail with reference to the single drawing, the purely sshemati sch in the manner of a block diagram the clarifies individual process steps.

The powder material kept bunkered in the raw state in the container 1 is in a suitable ratio with that by the Container 2 shown mixed paraffin in the form of granules. The ratio of paraffin is related of the talc is chosen between about 20 and JO percent by weight. The mixture is conveyed by any suitable means, for example a screw conveyor 3 in the liquefaction chamber 4 is conveyed further.

This chamber is supplied with a gas stream, for example warm or hot air, by two fans, namely an upper fan 5 and a lower fan 5 ¹ », the latter blowing in the air in the lower area of the chamber. The air is supplied from an ultraviolet sterilization apparatus 6 and passes through a preheating oven with a coiled tube passage.

The powder formed by the talc-paraffin mixture forms a flowable layer in which the paraffin is brought into a pasty or liquid state under the effect of temperature is and begins to coat the talc particles.

*
■ ⁱⁿ -.9 -,. 909826/1359

The flowable layer is under the action of the blower and 5 'via the pipeline system 8 into the fine grinding device 9 promoted.

This is made up of rotors 10, 10 ', 10 "with blades 11, 11 'and 12,12' together that are rotate at very high speed in a cylindrical housing. The rotors are going through each other Intermediate floor /! 3 »13 'separated, which the one on top of the other Limit the following work zones.

The mixture is fed to the fine grinding device approximately in its lower area and slowly rises along its walls, succumbing to the effect of extremely violent turbulence caused by the rotation of the blades and, in turn, the disintegration and crushing of the Effect of material grains and their conversion into a state of the most extensive fragmentation. With the finest particles first reaching the top, the products collected in the upper part of the crushing device are formed from a powder, the grains of which have a grain size of the order of about 10 to 50 microns. At the same time, the liquid paraffin is subject to the same reducing effect vaxä. is caused to form a skin the thickness of only a few molecules, which coats the granules of talc.

The products collected at the exit of the fine shredding device at approximately its highest point become one Cyclone separator 14 is supplied, polygamy separates the less fine particles, which are approximately in the lower range collected in the cyclone and fed back into the comminution system. The finest Products that are collected in the central area of the cyclone are then packed in sacks or, before being used,

V, l 9098 2 6/1359

-10 _

dung otherwise stored or bunkered.

According to a modified embodiment of the invention, the liquefaction chamber 4 is also charged a mixture of talc and paraffin, which by a The atomization or misting operation has already been pretreated. . -

For this purpose, the one held at 15 is kept in reserve Paraffin is brought into, a trough 16, in which it is in solution in a suitable solvent} for example dichloroethane, which is introduced at 17, and the Solution is fed into a mixing trough 18 in which the talc 19 is brought into suspension in its raw state. the Solution of the paraffin in the dichloro oil, which contains the talc in suspension, is carried out by the pump 20 in a nebulization tower conveyed on, where the mongrel is converted into a powder state. The smoke tower will open held a temperature which corresponds to the boiling point of the solvent, for example between 70 and 90 degrees for Dichlorathan, and the one required for it The amount of heat is generated by introducing a hot air stream under overpressure approximately in the lower area of the Fog tower 21 at. 22, causing instant evaporation of the solvent inside causing droplets that are scattered in the tower, dance around in it and fall back again. The Diehlοratshan is condensed at 2J, withdrawn at 24 and added to the Cycle 'returned.

Every droplet is on - this. Way into such Brought to a state in which a talc rabbit in intimately mixed with paraffin is located and has a porous structure, and these granules, which in the lower Area of the tower .-. Will then be used for a.

_11, _ 909 8.2 6/1359

.11 _

Feed into the liquefaction chamber 4- forwarded.

The method according to the invention makes it possible to obtain a product of a fineness which cannot be achieved with the mechanical fine comminution devices previously used. The environmental 'clothing of each talcum granule by the paraffin-containing product which is only about a Holeküls or the order having the thickness of a film of the depth of only less Koleküle, modified in any Weiee the natural properties of the talc mediated fB

This, however, has the favorable moisture repellency send properties that are used in therapeutic and, in particular, dermatological applications of the end product are very valuable.

It has been found that the talc obtained by the process according to the invention is of extreme fineness and does not involve the risk of the pores of the skin being unfavorably closed or stuck together, since the granules penetrating the pores are sufficient Leave space for the air to circulate. In addition, the increased specific surface area m has an advantageous effect, since the insulating and smoothing properties of the talc obtained by the method according to the Erfindtmg vrerden- considerably enhanced. ι

Sc ": iliexilic-: can send f euchtigkeitsabwei talc according to the Erfindusi- having a very small grain size and _a; are applied in the form of an aerosol by means of a compressed air cylinder having low Ijorrigrcßenverteilungsunterschied!.

The Srfir.lvcij is ™ above only on the basis of a particular one Auc Ausführungsbeispiel has been described, and the "-T-clr.ir:". :: korji, without- dr. ".. oi ler. l.r.I-r.en of an invention

909 826/1359

to leave various other embodiments and implement modifications by learning about the process steps described and how to carry them out of the method used according to the invention Facilities and their individual elements. Furthermore, the application of the invention described in the illustrated embodiment described only on the basis of the production of a powder for skin care has been intended to be used in the same way for the production of any powder for industrial use w and intended.

9 0 9 8 2 6/1359

Claims (9)

Claims 1.) Powder, especially for skin care, such as "for example lalcum powder or the like, characterized in that the individual particles of the powder material (1" or 19) from a skin of small thickness, for example of the order of only a few molecules, a moisture-repellent Are surrounded by means (2 or 15). 2.) Powder according to claim 1, characterized in that the skin formed by the moisture-repellent means (2 or 15) has the thickness of only one molecule. 3.) powder in particular according to claim 1 or 2, characterized in that the powder material (1 or 19) has a porous structure with which the moisture-repellent agent (2 or 15) is intimately mixed. 909826/1359 2 - 4.) Powder in particular according to one of the preceding claims, characterized by a grain size distribution of the powder material (1 or 19) -with a practically horizontal distribution curve in its central area and a small amount of grain in its edge areas. 5.) Powder in particular according to claim 4, characterized by a grain size distribution of the powder material (1 or 19) predominantly in the range between the grain sizes 10 microns and 50 microns. 6.) Process for the production of powder, in particular for skin care, such as talc powder or the like, according to one of the preceding claims, characterized in that the powder material (1) mixed in a suitable ratio with a moisture-repellent agent (2) in the raw material will. 7.) The method according to claim 6, characterized in that the powder material (1) is mixed in the raw state in a suitable ratio with a .Paraffin in the form of granules or fine chips. S.) Method according to claim 6 or 7 » characterized in that the powder material (1) mixed with the moisture-repellent agent (2) is introduced into a liquefaction chamber (A). 9.) Method according to claim 8, characterized in that the liquefaction chamber (4) is supplied with sterilized warm or hot air. - 3 - 909826 / 13S9 10.) The method according to claim 9 » characterized in that the warm or» hot air of the liquefaction chamber (4-) is switched on via a sterilizing device (6) associated with this and working with ultraviolet rays and a between this and the liquefaction chamber (4) Heating furnace (7) is supplied. 11.) Method according to one of claims 6 to 10, characterized in that the moist ^ repellant (2) mixed powder material (1) in the form of a flowable stream (8) and moved into a crushing device (9) is introduced. 12.) The method of claim 11, characterized in _that%, the material introduced into the leinzerkleinerungseinrichtung (9) (S or 1.2) in that the effect of rotating in a cylindrical housing with a very high speed blade rotors (10, 1Ό ¹ , 10 "), which are arranged at a distance one above the other and separated from one another by intermediate floors (13, 13 ') which (|| delimit the successive treatment chambers from one another. 1JF.) Verfaliren _r, according to claim 11 or 12 characterized in that the Katerial introduced into the j? Einserkleinerungseinriclitung (9) (8 and 1.2) in that the effect of Verwirbelungsbewegungen, plural marriage the Peinzerkleinerungseinrichtung (9) the gaseous carrier stream! (8), which carries the powder material (1) in suspension, is exposed in such a way that the granules (1) break up to only a reduction in their size to biicrometric dimensions and the 909826/1359 ^ -JT- Moisture repellant teardrop (2) is caused to such a degree that this is only a skin of the thickness only about a molecule that surrounds the lights of the powder material (1). ■ 14.) The method according to any one of claims 11 to 13, characterized in that the finely comminuted material of the fine comminuting device (9) is continuously removed and introduced into a 2yklon separating device (14), which the less fine grains that are circulated back into the The flax shredding device (9) is returned from the finest grains that are ready for further use. 15.) The method according to any one of claims 6 and 8 to 14, characterized in that to achieve the mixture, the moisture-repellent agent (2 or 15) in a suitable solvent (17) is brought into solution, that the powder material (1 or . 19) is brought in the raw state in suspension in this solution (16 or 2.17 "or 15.17), and that the mixture (18) of Eudermaterial (1 or 19) and solution (16 or 2, 17 or 15, 17) is then subjected to a treatment in a nebulization tower (21) charged with warm or hot air (22), which causes the evaporation of the solvent (17). 160. The method according to claim 15 for producing an Ialcum powder, characterized in that a paraffin is used as a moisture-repellent agent (15) - 5-909826 / 1359 in a suitable 3jö sting smitt el (17), for example Dichloroethane, brought into solution and in this Solution (16) the talc (19) i ^ i raw state suspended (18). 17.) A method according to .Anspruch 15 or 16, characterized in that the granules formed from an intimate dissolution of the powder material (1 building. 19) and the moisture-repellent agent (2 or 15), which are approximately in the lower region of the misting tower ( 21) are collected, the liquefaction fl chamber (4) are supplied. 18.) Method according to .Anspruch 10 or 11, characterized in that the granular material collected approximately in the lower region of the nebulization tower (21) is subjected to conventional mechanical comminution. 19 ·) Device for carrying out the Verfallrons according to one of .Ansprüche 6 to 14, characterized in that it has a liquefaction chamber (4) and a device (3) for charging this chamber (4) with powder material (1 or 19) iia Eohzu - W stand as well as with a moisture-repellent coat (2 or 15) in the form of granules or small chips, furthermore one or more blowers (5 or 5 ') by means of which warning or hot air can be supplied to the liquefaction chamber (4), and a Feinzerkleinerungseinrichtimg (9) with very high speed rotating blade egg-shaped Ilahl elements (10, 10 ', 10 "), in which the powder material (1 or» 19) and - 6 9 0 9826/1359 the granules of the moisture repellant (2 or 15) containing flowable bed (8) absorbable and by violent air turbulence reducing the grain size of the powder material (1 or 19) to a finely divided state 'as well as the coating of these granules of powder material (1 or 19) by the moisture-repellent agent (2 or 15) in a very small amount Layer thickness can be brought about, as well as a cyclone separator (14) for the classification of the powder material (1 or 19) after it has passed through the fine grinding device (9). 20.) Device according to claim 19, characterized in that it is designed so that the grain size of the powder material (1 or 19) can be reduced such that the grain size distribution curve has a predominant area of practically the same amount of grain size. 21.) Device according to claim 19 or 20, characterized in that a device (16 to 23) for intimate mixing of the powder material located in the raw material (19) and the moisture-repellent agent (15) is provided, which has a mixing container (18) of in which a solvent (17) can be accommodated, in which the moisture-repellent agent (15) can be brought into suspension in the solution (16) and the powder material (19) in the high state can be brought into suspension, a nebulization tower in which the loss of the cohesion of the particles of the solvent (15) and the formation of granules of porous structure can be brought about that the powder material (19) in intimate - - 7 - BAOOBiGINAL 909 82 6/43 5 9 -Ψ- ■ Mixing with the moisture balance Contains means (15) and a device (3) siu? Transport of the granules to the liquefaction chambers having. Patent attorney 9 09826/135 9 Blank page