DE1567845C3 - Aqueous dispersion of chrysotile asbestos and process for their preparation - Google Patents

Description

For example, 1.25 parts by weight of aluminum sulfate are added to the dispersion.

According to the invention, not only is the smoothness and flowability of the dispersion improved, but, surprisingly, the dispersion can also be stored for longer and it can be stored in the cold state to be used. In addition, the dispersion is very homogeneous. Until now, such dispersions had to be used always processed relatively quickly after their production and to a temperature above room temperature lying temperature can be heated.

The invention can be used to advantage in the method which is the subject of the patent application P 17 35 014.0 is.

Claims (2)

1 2 This object has now been achieved by an aqueous patent claims: chrysotile asbestos dispersion, containing a water-soluble soap and optionally another surface 1. Aqueous chrysotile asbestos dispersion, containing an active agent as a dispersant and one or more water-soluble soap and, if necessary, another surface-active agent as a dispersant, which is obtained by adding one and the one lubricant one or more with the soap in; water-soluble soap and optionally other reaction passing substances, obtainable surfactant as Dispe ^r yaw medium entdaß one to which a water-soluble soap and retaining dispersion, an aluminum salt, sulfur Optionally another Disper surfactant io acid, copper sulfate, zinc chloride, calcium chloride, agents containing as a dispersant - Magnesium sulphate or a mixture of these compounds an aluminum salt, sulfuric acid, copper fertilizer is added in an amount that is 20 to 80% of the sulphate required for sulphate, zinc chloride, calcium chloride, magnesium coagulation of the chrysotile asbestos or a mixture of these compounds in quantity. in an amount that 20 to 80% of the coagulant 15 The present invention is based on the fact that lation of the chrysotile asbestos required amount surprisingly the suppleness, homo is, the quality and flowability of such a dispersion, 2. Process for the preparation of the aqueous which is a water-soluble soap and optionally a Chrysotile asbestos dispersion according to claim 1, there being another, surface-active agent as a dispersing agent characterized in that to the one water-soluble 20 and one or more with the soap in reaction Lent soap and, if necessary, other substances that come out, can be improved if Surface-active agent as a dispersant contains a water-soluble soap and optionally a tend dispersion an aluminum salt, sulfur- surfactant other than dispersant acid, copper sulfate, zinc chloride, calcium chloride, dispersion containing an aluminum salt, sulfur-magnesium sulfate or a mixture of these 25 acid, copper sulfate, zinc chloride, calcium chloride, Compounds in an amount is added that includes magnesium sulfate or a mixture of these Ver-20 to 80% of the to coagulate the chrysotile bonds is added in an amount that 20 to asbestos required amount. 80% of that required to coagulate the chrysotile asbestos Amount is. 30 If such a substance or such a substance mixture of an asbestos dispersion is added, the Dispersion of a certain amount of unstable. Becomes even more of the substance or the mixture of substances The present invention relates to an aqueous added, so the asbestos dispersion has a tendency to chrysotile asbestos dispersion containing a water-soluble 35 coagulate and form lumps. According to the invention soap and possibly another surface, it is now important to add only enough of the substance or active agent as a dispersant and one or the mixture of substances that such a number of substances reacting with the soap, coagulation does not occur. The amount that a coagus as well as a method of making one. animals is easily caused by attempts at er-chrysotile asbestos dispersion. Average 4 °. It is then advisable to add between 20% and dispersions of chrysotile asbestos under 80% of this amount. The substance to be added using a water-soluble soap as a dispersant can first be dissolved in water and then gradually produced in medium. The best dispersions can be brought into the dispersion using a mixture of soap and while stirring thoroughly. The substance can also be dissolved in the water of another anionic, surface-active disperser, from which the dispersion is produced. greed, e.g. B. an alkylarylsulfonate, an alkyl- The additive is conveniently aluminum sulfate sulfosuccinate or a sulfated higher alcohol, or another aluminum salt; but it can also achieve. A particularly suitable mixture consists, for example, of sulfuric acid, copper sulphate or zinc from 6 parts of soap and 1 part of another anionic chloride or a mixture of these substances. Also dispersant. Such a dispersion is e.g. B. how. 50 Calcium chloride or magnesium sulfate can be used as follows: be; Since these substances are usually contained in tap water with a degree of hardness, their dispersion depends on the dispersion of about 30 ppm, expressed as a ^{setting menu for part of the hardness of what} " Calcium carbonate (at 60 ° C) 1000 parts ⁸⁶¹ JLj. _A , .. _1f . . . ,, ",. ' Chrysotile asbestos (2nd degree) ........ 20 parts ⁵⁵ _A Is made with aluminum sulfate and with a 2% Sodium dodecylbenzenesulfonate ... 1.2 parts asbestos dispersion worked, which is a water-soluble one Soap (containing sodium salts of a mixture ^ ^u " ^d Natnumdodecylbenzenesulfonat, so lanekettieer fatty acids) 7 parts ^{was established} > ^that coagulation ^{starts when} long chain fatty acids; / 1 rush ^ _quantity ^ _{aluminum sulfates} (A1 ₂ (SO ₄ ) ₃ · 16 H ₂ O) If such a dispersion also contains colloidal or 60 240 g per kilogram in the dispersion is essentially colloidal, however, it is not dry soap. A certain, but slightly particularly pliable and fluid and is not docile improvement is with a small addition of sufficiently homogeneous. Aluminum sulfate achievable. The improvement will be The present invention, however, was only significant when the added aluminum based on such an improved, aqueous amount of chrynium sulfate 65 g per kilogram of dry soap To create sotilasbestos dispersion, which is next to a dispersion. It is expedient to use 50 to 200 g good suppleness and homogeneity also include an aluminum sulfate per kilogram of dry soap in the has excellent flowability. Dispersion added. The typical one mentioned above