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. DISPEX AA4040
Product Overview:
DISPEX AA4040 is part of BASF's range of high-efficiency water-based coating dispersants, especially for the dispersion of inorance pigments.physical properties of
DISPEX AA4040
appearance; wheat rod color, liquid
solid content: 43%
25 degrees C dynamic viscosity (Brookfield 20rpm): 400mPa.s
20 degrees C specific gravity: 1 1 .16
(typical physical characteristics are reference materials for product physical data provided by suppliers to users or potential users and should not be used as testing standards for product qualification or failure; detection indicators and methods refer to product inspection reports and product indicators file)Scope of application
DISPEX AA4040 has ideal dispersion and stability in a wide range of water-based coating systems.
type of alkali used in acrylic polymers will significantly affect the final performance of the coating, DISPEX AA4040 releases ammonia during drying, and the water and alkalinity resistance of the paint film after drying is significantly improved.
compared with other inormeric salt dispersants such as polyphosphate, the polymer dispersant DISPEX AA4040 significantly improved pigment dispersion and coating storage stability.
the pH range of DISPEX AA4040 is 5-10.5, and the applicable temperature range is not greater than 70 degrees C, so as not to lose more ammonia and affect the use of the effect.Use Method
recommends adding pigment powders to water that already contains DISPEX AA4040 dispersants in a quick mixing situation, instead of adding DISPEX AA4040 dispersants to the pigment slurry, usually with a pH of 8.5.Dosage
dispersant dosage depends to a large extent on the chemical composition of pigments, the nature and shape of particle surfaces, but also closely related to the type of latex, serious overuse will damage some of the properties of the coating, and make costs rise, the same, insufficient dosage will lead to a decline in storage stability and similar dispersants, due to the quality performance fluctuations between the pigments and latex of each batch, the actual formulation is recommended for the theoretical best dosage of 1.5-2 times..
