TEGOMER® DA 640 is a liquid dispersing additive used for surface wetting to improve the 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 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.
Typical Applications
TEGOMER® DA 640 is an anionic modified polyether to be used for the following main applications
TEGOMER® DA 640 is applied as an emulsifier for the polymerization of acrylates or PVAc.
- Dispersing of fillers, inorganic and organic pigments in water-based systems
- Flocculation of inorganic pigments or fillers even in the presence of a high electrolyte content
- Emulsifier for polymerization
TEGOMER® DA 640 is applied as an emulsifier for the polymerization of acrylates or PVAc.
Benefits at a glance
- Higher filling of pastes at low addition levels in combination with excellent rheological properties and no occurrence of gelling
- Higher Color strength and improved hiding power for titanium dioxide pastes
- Improved water repellence which goes parallel with the flocculation ability of high density materials
- Improved durability due to the 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