Special titanium dioxide for color masterbatch

Abstract

The invention relates to special titanium dioxide for color masterbatch, wherein the content of titanium dioxide TiO2 is 95-97%, the rutile content is not less than 99.7%, the S element content is notmore than 3 ppm, the specific surface area is 350-370 m<2> / g, the agglomeration particle size D50 is 0.10-0.20 [mu]m, the agglomeration particle size D90 is less than or equal to 0.5 [mu]m, the volatile matter (105 DEG C, 2 h) is less than or equal to 1.5%, the burning loss (the sample is burned for 1 h after drying for 2 h at a temperature of 105 DEG C) is less than or equal to 8%, the pH valueof the aqueous suspension is 6.5-7.5, the water absorption is (30-35) g / 50 g, the 45 [mu]m sieve residue is less than or equal to 0.04%, the oil absorption is 23-25 (g / 100 g), Fe2O3 is less than or equal to 0.005%, and (K2O+Na2O) is less than or equal to 0.008%.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and in particular relates to a preparation process of titanium dioxide specially used for producing plastic color masterbatches. Background technique [0002] Titanium dioxide scientific name titanium dioxide (TiO 2 ), there are mainly two crystal forms of rutile and anatase. Because of its superior whiteness, tinting strength, hiding power and other advantages, it has the highest refractive index among all white pigments, and is considered to be the best white pigment, so it is widely used in coatings, plastics, printing and rubber industries. As the second largest user of titanium dioxide, plastics can not only use its high hiding power, high tinting power and other pigment properties, but also improve the heat resistance, light resistance and weather resistance of plastic products. The masterbatch titanium dioxide is located in the core layer of the masterbatch, so the requirements...

AI Technical Summary

Problems solved by technology

The masterbatch titanium dioxide is located in the core layer of the masterbatch, so the requirements for whiteness, dispersibility, hiding power, processing torque performance, etc. are relatively high. The titanium dioxide obtained by the traditional process is often difficult to meet the above requirements, so how to improve the existing process to Obtaining titanium dioxide products with higher whiteness, better dispersion, hiding power and stronger processing torque has become an urgent technical problem to be solved