New and efficient solutions for optimizing titanium dispersion: Coadis #8482; 144 A

Dispersants are essential additives for the proper preparation of water-based coatings. They facilitate the dispersion of the sticky process and ensure good storage stability of the coating. Dispersants can also add added value to coatings in terms of compatibility, color display and water resistance.
mechanical dispersion is not enough to break up the lumps formed in water by fine fillers or pigments. Because of its water-soluble nature and high compatible with the ionized surfaces of pigments and fillers, dispersants help reduce interface energy. By forming an organic protective layer, the dispersant can also maintain the stability of the mineral dispersion for a certain period of time.
low- and medium-low PVC coatings containing a large proportion of high-value pigments or fine fillers such as TiO
2
) are often selected based on co-dispersion structures. The special structure of this dispersant enhances the typical additional properties required for high-quality coatings, such as pigment compatibility, masking, high gloss, water resistance and stain resistance.
the grade and quality of titanium whites affect their primary optical properties (brightness, masking force, gloss) and the recommended use (easy dispersion for high, medium or low PVC coatings). The challenge is to fully restore the properties and properties of powder pigments, even when dispersed in water.
light scattering generated on mineral particles can accurately explain the optical behavior of the coating. When light is reflected and scattered in small particles such as well-dispersed titanium whites, its optical performance is maximized, resulting in better brightness and cover.
Coadis ™ 144 A is a versatile, high-performance hydro-hydropicide that delivers superior performance for a range of water-based interior and exterior wall coatings.
its dispersion and stability capabilities are very effective for a wide range of TiO
2
pigments, making Coadis™144A one of the best solutions for providing stable, low viscosity for a wide range of TiO
2
slurry.。 Indoor semi-gloss coatingsgrinding % %water 7,77 77,77dispersant reference product 0,37 0,00 Coadis? 144 A 0,00 0,43Surfactants 0,28 0,28Desulbants 0,09 0,090,140,14sodium carbonate 0,39 0,39Redstone TiO
2 23,15 23.13 aluminium silicate pigment 1,1, 87 1,87 7,88 7,87 paint Encor?300 32,66 32,65 Encor? 626 14,00 13,99
defoulant 0,190,19 Rheotech? 2800 2,03 2,02 Rheecech? 4800 0,04 0,04 9,15 9,14 total 100,00 100,00 % dispersant effective addition 0,19% 0,19% slurry preparation
coadis ™ The 144A is compared to the market reference product at 76.5% TiO
2
of the slurry. Figures 4 and 5 show that less Coadis™ 144A is required to achieve the minimum viscosity of the slurry, which means ™ 144A is more efficient than market reference products.
we have made similar assessments of other levels
TiO
2, such as Ti-Pure R 706, R 902, Tronox CR 826, and CR 828. Coadis?144A achieves minimum slurry viscosity with a smaller amount of addition, regardless of TiO
2
rating compared to market reference products. In addition, the Coadis ™144A grinds out a lower viscosity titanium slurry and exhibits better stability than market reference products.
interior half-gloss coating
In the indoor half-gloss coating formulation, Coadis™ 144 A is compared to an existing market product. Coadis ™ 0.19% of the effective additions to both the 144A and market reference products. TiO
2
23% and lotion use is about 46.5%.
the fluidity of ™ coating remains good, as it is used by Coadis as an alternative to the 144 A market reference product. The medium and high shear viscosity are very close to the original system (Stormer and ICI viscosity, respectively) (see Figure 6) and the low shear viscosity data are also very close (Brookfield viscosity, see Figure 7). The balance between leveling and anti-flow hanging also remains the same.
optical properties
are key to high-quality coatings, such as semi-gloss coatings. They are an important
the
and stable dispersion of TiO 2. Figures 8 and 9 are data on the masking power, coloring ability and gloss of the half-gloss coating.
, Coadis' 144A ™ fully meets the performance level of the market reference product. Their masking power is close to 97%, and in both cases the coloring ability and gloss are similar.
mechanical properties
may also be affected when dispersants are used or replaced. When making semi-gloss coatings, contamination resistance and adhesion resistance are usually tested, and scrub resistance tests are carried out systematically. These tests can show dispersants or high or low hydro-hydroporic properties and their effects on film-forming membranes.
10, 11 and 12 show the improved features of using Coadis
™
144A compared to market reference products. Lipstick resistance is significantly improved and adhesion is slightly reduced. Scrub resistance is similar, but using Coadis
™
144A for a better visual appearance.
conclusion is
Coadis™144 A is perfect for the preparation of high-solid, low-viscosity and stable TiO
2
slurry, which in most cases exceeds market reference products. It works well with various grades and surface treatments of the
2
2 models. Other studies have revealed that Coadis™144A and TiO
2
can produce synergies in coating formulations compared to market reference products.
it has good formulation compatibility with connective rheumor modifiers such as anionic HASE, such as the semi-optical coating formulations described above (using Rheotech™2800 and Rheotech™ 4800), as well as non-ionized HEUR thickeners (e.g. Coapur?
Coadis™ 144 A improves stain resistance, adhesion and scrub resistance in low- and medium-priced PVC coatings compared to market reference products. It is compatible with pigments, shows good color display, and helps reduce foaming, making coatings easy to use and treat.
Coadis ™ 144 A complies with current and future regulations and is free of solvents, APEO and heavy metals.
Coadis ™ range of dispersants designed to provide high performance and special solutions. This topic will be presented at the next European Coatings Show in Nurem, Germany, in April 2017.
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