Product description: TEGOMER® DA 640 is an anionic modified polyether to be used for the following main application:- dispersing of fillers as well as of inorganic and organic pigments in water-based systems
- flocculation of inorganic pigments or fillers
- emulsifier for the polymerization
Application: TEGOMER® DA 640 is a liquid dispersing additive used for surface wetting to improve dispersion properties of:- inorganic fillers e. g. talc, barium sulfate
- inorganic pigments e. g. titanium dioxide, Ultramarine blue, iron oxides
- organic pigments and carbon blacks can be dispersed as well with higher addition levels
TEGOMER® DA 640 is suitable at lower addition levels to be used as flocculent for inorganic particles only, e. g. titanium dioxide, metal hydroxides TEGOMER® DA 640 is a primary or secondary emulsifier for the polymerization of acrylates or PVAc. Benefits: The use of TEGOMER® DA 640 offers several advantages in dependence on the function used: - higher filling of pastes at low addition levels in combination with excellent rheological properties and no occurrence of gelling
- higher color strength respectively improved hiding power for titanium dioxide pastes
- improved water repellency which goes parallel with the flocculation ability of high density materials
- improved durability due to hydrophobic character when used for surface treatment
- less abrasion of doctor blades using filler or titanium dioxide pastes for the application of paper coatings
- water-based formulations which contain significant amounts of glycol or other solvents can be stabilized as well
- solvent- and nonylphenol ethoxylate-free emulsifier technology
- pure acrylates as well as those with high EHA content for adhesive formulation reach fine particle size distribution if it is used as emulsifier
- water pick up of emulsions and pigments/ fillers is lowered
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