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| Test items | quality index |
| TiO2 content%(m/m) | ≥92.5 |
| brightnessL* | ≥94.8 |
| Achromatic force 9 (Reynolds number) | ≥1880 |
| SCX value | 3.2 ~ 3.8 |
| PH value of suspended solids in water | 6 ~ 8 |
| Water extract resistivity,Ωm | ≥80 |
| Rutile Content,% | ≥98 |
| Oil absorption,g/100g | ≤20 |
| 45μm Sieve residue,%(m/m) | ≤0.02 |
| 105℃Volatile matter,%(m/m) | ≤0.5 |
| Oil dispersion (Hagemann number) | ≥6.0 |
| Relative whiteness | Myopia or not lower than |
Brand introduction and Application
Product introduction:
R-251 is a multi-purpose rutile titanium dioxide pigment designed for coatings, paints, plastics and other applications. It has the properties of blue background hue, good dispersion, good hiding power and high gloss. Its excellent particle size control technology, surface treatment technology and impurity content control technology ensure the excellent pigment performance of the product and good performance in various application systems.
Product advantages:
good dispersion
1) The dispersibility is determined according to the dispersion method for evaluating the dispersion of pigments and pigments - Part 3: dispersion by high-speed mixer iso8780-3:1900. The detection parameter: the pigment content is 70%. The linear speed of dispersion is 10.5m/s, and the high-speed dispersion time is 10min; The calculation of coarse particles is 75 μ M number of particles with a groove depth of 1 square inch; The calculation of fine particles is 25 μ M is the number of particles in an area of 1 square inch deep.
2) R-251 has good dispersibility and very low visible particle content.
good whiteness
1) Titanium dioxide is dispersed in the resin to make a paint with a pigment volume concentration (PVC) of 17%. The white paint is made into a fully covered paint film, and the color is detected after the film is formed.
2) R-251 has good whiteness, which is better than most of its peers in sulfuric acid titanium dioxide.
good covering power and luster
1) Hiding power: titanium dioxide is dispersed in the resin by high-speed stirring to make paint with pigment volume concentration (PVC) less than 17%, and the white paint is made into dry film thickness of 19 μ M, and the contrast is detected after film formation.
2) Gloss: titanium dioxide is dispersed in the resin by high-speed stirring to make paint with pigment volume concentration (PVC) of 17% and 35%, 150% respectively μ The wet film preparer of M was used to make the paint film, and the film was tested for 20. Gloss.
3) R-251 has good gloss in coatings and good hiding power in most coating systems.
strong blue background and high achromatic power
1) In the grey polyvinyl chloride containing plasticizer, the content of titanium dioxide is 2phr
2) R-251 has small particle size and concentrated distribution. With the help of excellent inorganic surface treatment and unique organic treatment, it can obtain good achromatic power and ultra blue bottom phase in color paddle and color chip industry.
3) R-251 is used in the color chip industry of leather, which can additionally obtain better heat yellowing resistance.
Product application:
R-251 is recommended for coatings, inks, plastics, color paddles, color chips, etc.







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