DEVELOPMENT OF SEDIMENTATION RESISTANT WATERACRYLIC TITANIUM DIOXIDE DISPERSIONS
Dyuryagina A. Lutsenko A.
2021Technology Center
Eastern-European Journal of Enterprise Technologies
2021#4Issue 6-11251 - 59 pp.
According to the results of the research, the effect of stabilization of dispersions of titanium dioxide in water-acrylic compositions was established. It was proved that in aqueous-acrylic suspensions at all variations of film-forming agent (from 0 to 5 g/dm3), the maximum of stabilizing activity of the surfactants under study is achieved at CSAS=0.25 g/dm3. The minimum deposition rate of titanium dioxide dispersions at a dosing of 0.25 g/dm3 of sodium polyacrylate was at the level of 0.097 10-3 g/s at any content of film-forming agent (Cff=)).5÷5g/dm3) in suspensions. At the introduction of the same concentration (CSAS=0.25 g/dm3) of the polyether siloxane copolymer, a decrease in sedimentation rate to 0.053 10-3 g/s in suspensions with a limited acryl content (C<1 g/dm3) was recorded. At an increase in the concentration of a film-forming agent (C>1 g/dm3) in suspensions, sedimentation stability decreased, which is proved by an increase in the sedimentation rate of TiO2 to 0.11010-3 g/s at Cff=5.0 g/dm3. It was found that in aqueous-acrylic suspensions with the film-forming content from).5 to 1 g/dm3, the minimum average diameter was 2.64÷3.1 µm CSAS=0.25 g/dm3. Further concentration of acryl (Cff=45 g/dm3) at the same dosage of polyether siloxane copolymer was accompanied by an increase in the average particle size up to 4.30÷4.61 µm. The maximum of wedging activity of sodium polyacrylate (CSAS=).25 g/dm3) corresponds to the same minimum of the average diameter (2-3 µm)
adsorption , polyether siloxane copolymer , sodium polyacrylate , titanium dioxide , water-acrylic compositions
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Head of Department, Department of Chemistry and Chemical Technologies Manash Kozybayev North Kazakhstan University, Pushkin str. 86, Petropavlovsk, 150000, Kazakhstan
Master of Engineering, Department of Chemistry and Chemical Technologies, Manash Kozybayev North Kazakhstan University, Pushkin str. 86, Petropavlovsk, 150000, Kazakhstan
Head of Department
Master of Engineering
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