DE2158908A1 - Exfoliated borax mixtures, processes for their production and their use - Google Patents

Description

Exfoliated borax mixtures, processes for their production and their use

The invention relates to exfoliated borax mixtures, processes for their production and their use.

Detergent powders containing alkali borates are known; Borates are preferably used in detergents as alkaline Builders used, whereby they improve the properties of detergent mixtures. It is known to use alkali borates, such as sodium tetraborate decahydrate, sodium tetraborate pentahydrate, anhydrous sodium tetraborate or the corresponding potassium salts, in detergent powders optionally together with other known alkaline builders, such as various phosphates, carbonates, silicates and similar compounds. Furthermore, the production of an exfoliated form of borax, which is usually called "bloated" 3orax is known by heating alkali tetraborate decahydrate or the corresponding pentahydrates. In this process, the water of crystallization is evaporated, with an expansion of the borate particles to become extremely porous

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ORIGINAL BATHROOM

Forms. They are already exfoliated borax preparations have been produced that have a "swelling factor" of about 30, the expansion factor being the volume ratio of the exfoliated to non-exfoliated borax being ' is drawn. It has already been proposed to exfoliate borax because of the obvious merits of minority Use bulk density in detergent mixtures, as this results in pleasant usage properties in the end product. Further advantages of exfoliated borax are the reduction of stratification and improved storage stability of detergent powders due to their low bulk density and also the improved and faster ones Solubility, which enables particularly favorable properties to be achieved when incorporated into a detergent powder. These Advantages of exfoliated borax for detergent mixtures seem to suggest that it is particularly useful; however, this is not the case because of the extreme Fragility of the exfoliated borax particles is undesirable Dust development from abrasive material during processing. In addition, the exfoliated borax tends to be due to the machining in storage to become brittle and collapse.

The invention is therefore based on the object of producing mixtures of to produce exfoliated borax, which does not show the disadvantages of brittleness, abrasion and dust generation.

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BATH ORIGINAL

To solve the problem, it is proposed to use mixtures of exfoliated borax, which are characterized in that they contain up to 10% by weight, based on the total mixture, of dyes or pigments for stabilization in a uniform distribution.

It has been found, completely surprising, that when treating exfoliated borax with smaller amounts of dyes or pigments not only results in a colored form of the exfoliated borax, but that through the coloring a considerable increase in chemical and physical stability is achieved. This improved stability leads to the fact that in the normal processing of this product or in the processing of detergent mixtures with a content in this product the cohesion of the individual particles is maintained and is therefore only insignificant Generate amounts of abrasion and dust.

To produce the mixtures of exfoliated borax, it is proposed according to the invention to use exfoliated borax with a Dispersion of a selected dye or pigment in water under controlled conditions so that This creates a peeled borax with dyestuff or pigment particles firmly adhering to it. The coloring leaves perform in different ways; a preferred method consists in the preparation of a dispersion, suspension or dissolving the colorant in the water and in the application

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BATH

-H-

this preparation by known methods, preferably by spraying onto the granulated, exfoliated borax. Another method is to add the selected one Coloring agent in powdered form to the granulated, exfoliated borax and subsequent spraying of water on the preparation, with an even mixing and a firm attachment of the dye particles the exfoliated borax. To achieve an even distribution of the dye or pigment it is preferred to work in devices that allow the components to be carefully mixed and sprayed on at the same time allow a liquid on the solid matrix. These devices include, for example, the usual coating pan, Rotary bowls or rotary funnels.

Processes for producing exfoliated borax are known and are described, for example, in "Soap and Chemical Specialties", January 1966, pages 58-68 and 118-120. Preference is given to using sodium tetraborate decahydrate or sodium tetraborate pentahydrate as the starting material for production. The pentahydrate is preferably used, which is generally available as white granules with a water of crystallization content of approximately 30 % and a density of approximately 1.0 to 1.4 g / cm 2. After puffing, the product consists essentially of the puffed granules and has a density of about 0.06 to 0.14 g / cm3. That

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for performing the method according to the invention to be used at the best starting material is usually in dehydration temperatures between 250 to 30O ⁰ C and 25O ⁰ C, preferably to prepared.

An essential point of the method is that should be the total amount of water added, based on the total material treated, non-^ iO wt.%. If more water is used, the borax tends to accumulate in the form of large lumps, furthermore the strength of the masses is deteriorated because they become more brittle, and caking of the colored borax also occurs.

In addition to the exfoliated borax, the mixtures according to the invention of exfoliated borax contain paints or pigments in very small, barely visible amounts of up to approximately 10% by weight and preferably 2 to 6% by weight . All suitable dyes, soluble and insoluble pigments or the so-called "optical" dyes can be used for coloring.

Preferably, together with the dyes or pigments, a smaller amount of a surfactant and optionally applied a hydrotropic compound. The surfactant ensures that the dye or pigment spreads evenly

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mentes promoted; it also reduces the fragility. The hydrotropic compounds also promote uniformity Distribution of the dye and reduce the brittleness, but also improve the speed of dissolution of the Granules and thus improve the applicability of the colored, exfoliated borax in detergent mixtures.

In general, anionic, nonionic, cationic or ampholytic surfactants can be used / but anionic or nonionic surfactants are preferred. Anionic compounds such as alkylbenzenesulfonates, olefin sulfonates and paraffin sulfonates such as sodium dodecylbenzenesulfonate, sodium tridecylbenzenesulfadonate, sodium tridecylbenzenesulfonate, give good results -hexadecensulfonat and similar olefin sulfonates, such as are for example besehrieben in British patents 9830 56 "104285 1030648 or ¹ I. This also includes primary alkanesulfonates with 10 to 20 carbon atoms and similar compounds. The compounds usually used for detergents can be used as hydrotropic compounds; Sodium benzenesulfonate, sodium toluenesulfonate or sodium xylene sulfonate are preferably used. The surfactant and the hydrotrope are used in relatively small amounts so that they in no way affect the properties of the finished detergent mixtures. When using the surface-active compound or the hydrotropic compound, these are usually in amounts of

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0.1 to 10 and preferably from 1 to 6 Gew.i, based on the total weight of the borax mixture, added.

As stated above, the amount of water to should in no case more than ^one IO percent.? the total mix; In general, the amount of water added is from 10 to Ίο and preferably from 25 to 35% by weight.

The inventive mixtures of exfoliated borax usually have densities around 0.1 g / cm 'and a moisture content of 16 %. The particle size distribution is generally as follows: 0.2% are of a sieve No. 12, 96% are retained on a sieve No. ¹ IO, and only 3% pass through a sieve Nr. 100...

The following examples are intended to explain the invention in more detail. Unless otherwise stated, all partial data relate on weight.

example 1

Making a blue colored, granulated, exfoliated borax:

68 parts at 25O ⁰ C aufgeblätteter borax m in an inclined rotary dish with a diameter of 1 through a location at the upper end of the inclined tray feed at a rate of 38 kg / h introduced, and-the - Mischung- was

209825/1002 ' _BAD ofiiGINAL

a suitable spray device, axially attached to the rotating bowl, with 32 parts of a dye suspension containing 3.5 % of a blue pigment (Color Index, Pigment Blue 15), 25 parts of a 44 % slurry of sodium tridecylbenzenesulfonate and 71 »5 parts of water are sprayed at a speed of 18 kg / h while the rotating bowl is moving. During the spraying process, heat is developed due to the hydration of the borax, but this is evenly distributed due to the mixing of the borax with air due to the rotating movements of the bowl. The colored granules are unloaded from the bottom part of the rotating bowl.

Example 2

The process of Example 1 was repeated, but using a green pigment (Color Index, Pigment Green 7) in quantities of 2.5 parts. Sodium tridecylbenzenesulfonate in amounts of 30.0 Parts and water / water were used in the dye suspension in amounts of 67.5 parts.

The mixtures contained in Examples 1 and 2 showed an excellent uniform distribution, and the individual particles exhibited excellent brittleness reduction in ordinary processing. ""

Example 3

The procedure from Example 1 was repeated, the r.3 oak

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BATHROOM OBIGiMAL

Amount of the blue pigment, but instead of sodium tridecylbenzenesulfonate 13 _S, 2 parts of sodium toluenesulfonate and correspondingly larger amounts of water of 83.3 parts were used in the dye suspension. ".

Example M

The procedure of Example 2 was repeated, but instead of sodium tridecylbenzenesulfonate, 13.2 parts of sodium toluenesulfonate and an increased water content in the dye suspension of 84.3 parts were used.

The granules produced in Examples 3 and 4 showed excellent coloration, uniformity of coloration and remarkably low fragility and very high abrasion resistance during normal processing methods.

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Claims (1)

- ίο - Claims 1. Mixtures of exfoliated borax, characterized in that they contain up to 10 wt. 5?, Based on the total mixture, contain dyes or pigments for stabilization. 2. Mixtures according to claim 1, characterized in that they also have small amounts of an organic surfactant, in particular an anionic or nonionic surfactant, and / or a hydrotropic compound. 3. Process for the preparation of mixtures of exfoliated borax by heating forms of the matrium tetraborate containing water of crystallization to temperatures sufficient to remove the water of crystallization, the borax being exfoliated to a volume increased by five to thirty times, characterized in that the exfoliated, granulated borax, are treated with an aqueous dispersion or solution of a dye or pigment, wherein the total amount of water is not more than 40 wt.% of borax used and uniformly dyed, exfoliated Boraxpartikel dried. 20982 5/1002 ^. The method of claim 3 »characterized in that the exfoliated borax is prepared at a temperature of about 25O ⁰ C. 5. The method according to claim 3 to 4, characterized in that the exfoliated borax is treated with up to 10 wt.% Dye or pigment. 6. The method according to claim 3 to 5, characterized in that the exfoliated borax is treated with a solution of an organic surfactant. 7. The method according to claim 6, characterized in that the exfoliated borax, based on the total mixture, with 0.1 to 10 wt. an alkali alkylbenzenesulfonate is treated. 8. The method according to claim 3 to 7, characterized in that the exfoliated borax with a solution of a hydrotropic Connection is handled. 9. The method according to claim 8, characterized in that the exfoliated borax, -., Based on the Gesair.tmischunr, with 0.1 to 10% by weight of an alkali metal alkylbenzene sulfonate nit kur :: Kolta gen Alkylrruppcn being treated. 209825/1002 BAD ORIGINAL 10. Use of the mixtures of exfoliated borax according to claims 1 and 2 in detergent mixtures in amounts of 5 to 80% by weight , based on the total mixture. si: gü ": η O Q": <K / -ι r- ti ·}