Tamol N types. Technical Information. Tamol NN 2406 Tamol NH 7519 Tamol NN 2901 Tamol NN 4501 Tamol NN 7718 Tamol NN 8906 Tamolv NN 9104 Tamol NN 9401

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1 Technical Information Tamol N types TI/ES 1122 e September 2003 (DFC) Supersedes edition dated October 1991 = Registered trademark of BASF Aktiengesellschaft Tamol NN 2406 Tamol NH 7519 Tamol NN 2901 Tamol NN 4501 Tamol NN 7718 Tamol NN 8906 Tamolv NN 9104 Tamol NN 9401 Stabilizers, dispersing agents and precipitants for the chemical and allied industries Dispersing agents and auxiliaries for processing and polymerizing natural and synthetic rubber latex

2 Tamol N types Chemical nature The Tamol N types are condensation products of naphthalenesulphonic acid. The individual products in the range differ from each other in terms of their degree of polycondensation, degree of neutralisation and their salt content. The Tamol NN types have a low degree of polycondensation, and Tamol NH 7519 has a high degree of polycondensation. The first two digits of the numeric product code refer to the active content in percent. The last two digits refer to the sodium sulphate content. The overall solids content is the sum of the active content and the sodium sulphate content. All of these figures are approximate. Properties The Tamol N types supplied in powder form are pale brown or deep brown in colour. The products supplied in liquid form are dark brown. The most important properties of the Tamol N types are listed in the table below. Tamol NN NN NN NN NN NN NN NH Physical form Liquid Liquid Liquid Powder Powder Powder Powder Powder Solids content % Active content % Water content % (ISO 3733) Sodium sulphate % 6 1 0, content Degree of Low Low Low Low Low Low Low High polycondensation ph (10% in water) Density (23 C) g/cm Bulk density g/l Viscosity (23 C) mpa s The above information is correct at the time of going to press. It does not necessarily form part of the product specification. A detailed product specification is available from your local BASF representative. Solubility Compatibility. Aqueous solutions with a concentration of up to ca. 40% can be prepared from the Tamol N types that are supplied in powder form. The products supplied in liquid form are miscible with water in all proportions. The Tamol N types are largely resistant to alkalis, acids and salts. They are anionic, and their compatibility with other anionic and nonionic substances is good. They can precipitate in the presence of cationic substances. The following curves show the relationship between the viscosity of selected Tamol N types and temperature. page 3 of 8 TI/ES 1122 e September 2003

3 Viscosity (mpa s) Tamol NN 4501 Tamol NN 2406, NN Temperature C Viscosity as a function of temperature (Measured with a Brookfield viscometer at 60 rpm) Storage The Tamol N types supplied in liquid form must be protected from frost, because the solids tend to precipitate at temperatures below 10 C. They can be reconstituted by prolonged stirring or heating. The Tamol N types supplied in powder form should be kept in tightly sealed containers and protected from moisture. Applications The Tamol N types are very versatile stabilizers for aqueous dispersions and emulsions, and for solutions of surfactants and other auxiliaries. They can be employed as dispersing agents and grinding aids for pigments and dyes in aqueous media, as laking agents for dyes and as precipitants for other cationic substances. They also have applications in metal finishing. All of the Tamol N types have an excellent dispersing action and they perform well as protective colloids. They are not surface-active, with the result that they have low wetting power and very little tendency to foam. Stabilizing dispersions and emulsions Grinding and dispersing The Tamol N types can be employed in dispersions and emulsions of substances such as polymers, resins and waxes to enhance their stability during processing. If any solids do nevertheless precipitate, the Tamol N types ensure that they remain finely dispersed and do not agglomerate. Pigments and fillers form more stable suspensions when they are mixed with dispersions or emulsions if they are dispersed in water with the aid of Tamol N types before they are mixed. The Tamol N types can be used as grinding aids and dispersing agents in the production of water-dispersible pigments and fillers, pigment slurries, and other suspensions of particulate solids in water. page 4 of 8 TI/ES 1122 e September 2003

4 The Tamol N types cause a sharp reduction in the viscosity of pigment dispersions if they are added in the correct proportions. This makes it possible for highly concentrated slurries to be produced which are much easier to handle, because they can be pumped more easily and less energy is required to stir them. The Tamol N types are highly resistant to Ca 2+ ions, which makes them particularly effective for dispersing calcium sulphate. The Tamol N types can also be used to disperse powder abrasives in emulsion-type polishes and cleaners. Pesticide formulations Precipitating cationic substances Cleaning and finishing metal Tamol NN 8906 and Tamol NH 7519 are very effective dispersing agents for pesticides formulated as water-dispersible granules or wettable powders. They ensure that the active pesticide is dispersed homogeneously and forms a stable suspension. The Tamol N types can be used as precipitants and laking agents for basic dyes. The Tamol N types can be used to enhance the stability and to boost the soil-suspending capacity of degreasers, spray cleaners and high-pressure cleaners. Their detergency is often much higher if Tamol N types are included in the formulation. The performance of sealers for anodized aluminium can be improved by adding 20 30% Tamol N, expressed as a proportion of the salts in the sealing solution. The Tamol N types can also be employed as auxiliary brighteners in alkaline silver plating baths. Preventing caking in fertilizers Tamol NN 8906 can be added to fertilizers that contain ammonium nitrate to prevent them from caking. Other ingredients of anti-caking agents include mineral oil, mixtures of mineral oil and fatty amines, paraffin wax, and polyethylene waxes such as Luwax A. Polymerizing synthetic rubber The Tamol N types, especially Tamol NN 9104 and Tamol NN 4501, can be added to the mixture of surfactants employed in emulsion polymerization processes for synthetic rubbers such as styrene-butadiene rubber. They prevent emulsions from coagulating. Processing rubber latex Tamol NN 9104, Tamol NN 9401 and Tamol NN 4501 can be employed in natural and synthetic rubber latex as dispersing agents for pigments and fillers and as vulcanising agents. They help to improve the physical and chemical stability of rubber latex. The onset of the increase in viscosity that occurs during the pre-vulcanization process can be delayed by adding Tamol N types. page 5 of 8 TI/ES 1122 e September 2003

5 Safety We know of no ill effects that could have resulted from using the Tamol N types for the purpose for which they are intended and from processing them in accordance with current practice. According to the experience that we have gained over many years and other information at our disposal, the Tamol N types do not exert any harmful effects on health, provided that they are used properly, due attention is given to the precautions necessary for handling chemicals, and the information and advice given in our safety data sheets are observed. Handling The usual safety precautions when handling chemicals must be observed. In particular, safety glasses and a respirator must be worn when large quantities are being handled and no air extractor is available. Note The information submitted in this publication is based on our current knowledge and experience. In view of the many factors that may affect processing and application, these data do not relieve processors from the responsibility of carrying out their own tests and experiments; neither do they imply any legally binding assurance of certain properties or of suitability for a specific purpose. It is the responsibility of those to whom we supply our products to ensure that any proprietary rights and existing laws and legislation are observed. page 6 of 8 TI/ES 1122 e September 2003

6 BASF Aktiengesellschaft Performance Chemicals for Detergents and Formulators Ludwigshafen, Germany Printed in Germany