Lutensol® XL 40

• * Method D: 5 g of surfactant + 45 g of butyldiglycol solution (c = 250 g/l)
• * Method E: 5 g of surfactant + 25 g of butyldiglycol solution (c = 250 g/l)
• ** The pH of the Lutensol® XL types can decrease during storage, but this does not have any effect on their performance.
• *** Applying Harkins-Jordan correction.

• The relationship between viscosity and temperature is always an important point to consider when Lutensol® XL types are stored or shipped.
• We would rec om mend the prep ar a tion of 10 – 25% stock solutions of Lutensol® XL types if they are to be used in the form of very dilute solu tions, or if they are to be added to other solutions. This makes it very much easier to dilute them later on.
• The Lutensol® XL types can form fairly stiff gels at certain concentrations when water is added. The figures below were measured using a Brookfield-viscosimeter at 23°C and 60 rpm.

• The Lutensol® XL types should be stored indoors in a dry place. Storerooms must not be overheated.
• The Lutensol® XL types are hygroscopic due to their good solubility in water, with the result that they may absorb moisture very quickly. Drums must be resealed each time they are opened.
• The storage temperature should not be allowed to fall substantially below 20°C. The setting points of these products also need to be taken into account.
• Lutensol® XL 40, XL 50, XL 60 and XL 70 are clear to cloudy liquids at room temperature, and they tend to form a sediment. Lutensol XL 80 and XL 90 are cloudy liquids at room termperature, and they tend to form a sediment. Lutensol® XL 100 and XL 140 are soft, colorless or slightly yellowish pastes at 23°C. Lutensol® XL 40, XL 50, XL 60, XL 70, XL 80, XL 90, XL 100 and XL 140 become clear liquids at 50°C Lutensol® XL 79 and XL 89 are clear liquids at room temperature.
• Liquid that has solidified or that shows signs of sedimentation should be heated to 50 – 70°C and homogenized before it is processed.
• Drums that have solidified or that have begun to precipitate should be reconstituted by gentle heating, preferably in a heating cabinet. The temperature must not be allowed to exceed 70°C. This also applies if drums are heated by external electrical elements. Internal electrical elements should not be used because of the localized anomalies in temperature that they cause.
• The Lutensol® XL types must be blanketed with nitrogen if they are storedin heated tanks (at 50 – 60°C) to prevent them from coming into contact with air. Constant, gentle stirring helps to prevent them being diskolored as a result of prolonged contact with electrical elements or external heating coils.

The following materials can be used for tanks and drums:

• AISI 321 stainless steel (X6CrNiTi1810)
• AISI 316 Ti stainless steel (X6CrNiMoTi17122)

Provided they are stored properly and drums are kept tightly sealed, the Lutensol® XL types have a shelf life of at least two years in their original packaging.

• 190KG Steel drums
• Bulk