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Preparation method of special type titanium dioxide pigment for plastic color master batch

A technology of titanium dioxide and color masterbatch, which is applied in chemical instruments and methods, inorganic pigment treatment, dyeing organosilicon compound treatment, etc., can solve the problems of dry powder fluidity, dispersibility, processing and plasticizing properties that cannot meet plastic color masterbatches, etc. Achieve the effect of improving the photochemical activity of shielding titanium dioxide, wide application prospects, and excellent comprehensive performance

Inactive Publication Date: 2013-04-03
中信钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dry powder fluidity, dispersibility and processing plasticization performance of this type of product can not meet the requirements of the field of plastic color masterbatch

Method used

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  • Preparation method of special type titanium dioxide pigment for plastic color master batch

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Weigh 400g of the primary chloride-process rutile titanium dioxide powder with an alumina content of 0.6% and a D50 of 0.22μm, and add 800mL of deionized water to prepare a titanium dioxide slurry. Use a pH meter to detect the pH of the slurry during the entire coating process value; adjust slurry pH to 9.0 with sodium hydroxide solution, add sodium hexametaphosphate solution 8mL, the concentration of sodium hexametaphosphate solution is P 2 o 5 Calculated as 50g / L, dispersed for 20min;

[0026] 2. Grinding the dispersed titanium dioxide slurry, after grinding, the particle size D50 of the titanium dioxide slurry is 350nm and D90 is 620nm, and the grinding medium is removed from the water slurry;

[0027] 3. Heat the ground slurry to 50°C and maintain this temperature throughout the coating process;

[0028] 4. Add 100mL of sodium metaaluminate and potassium metaaluminate mixed aluminum salt solution within 0.5h, the concentration of sodium metaaluminate solution a...

Embodiment 2

[0033] 1. Weigh 400g of the primary chloride-process rutile titanium dioxide powder with an alumina content of 0.9% and a D50 of 0.24μm, add 700mL of deionized water to prepare a titanium dioxide slurry, and use a pH meter to detect the pH value of the slurry during the entire coating process , adjust the slurry pH to 10.0 with sodium hydroxide solution, add sodium pyrophosphate solution 8mL, the concentration of sodium pyrophosphate solution is P 2 o 5 Calculated as 150g / L, dispersed for 25min;

[0034] 2. Grinding the dispersed titanium dioxide slurry, after grinding, the particle size D50 of the titanium dioxide slurry is 300nm and D90 is 600nm, and the grinding medium is removed from the water slurry;

[0035] 3. Heat the ground slurry to 60°C and maintain this temperature throughout the coating process;

[0036] 4. Add 53mL of sodium metaaluminate solution within 1.0h, the concentration of sodium metaaluminate solution is Al 2 o 3 Calculated as 150g / L, at the same tim...

Embodiment 3

[0041] 1. Weigh 400g of the chloride-process rutile titanium dioxide primary powder with an alumina content of 1.2% and a D50 of 0.25μm, add 600mL of deionized water to prepare a titanium dioxide slurry, and use a pH meter to detect the pH value of the slurry during the entire coating process , adjust the slurry pH to 10.0 with sodium hydroxide solution, add sodium pyrophosphate and trisodium phosphate mixed phosphate solution 12mL, the concentration of sodium pyrophosphate solution and trisodium phosphate solution is P 2 o 5 The total is 100g / L, dispersed for 20min;

[0042] 2. Grinding the dispersed titanium dioxide slurry, after grinding, the particle size D50 of the titanium dioxide slurry is 360nm and D90 is 680nm, and the grinding medium is removed from the water slurry;

[0043]3. Heat the ground slurry to 70°C and maintain this temperature throughout the coating process;

[0044] 4. Add 33mL of aluminum trichloride solution within 1.5h, the concentration of aluminum ...

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Abstract

The invention provides a preparation method of a special type titanium dioxide pigment for a plastic color master batch, comprising the following steps of: preparing a titanium dioxide primary product into titanium dioxide slurry; adjusting a pH (Potential of Hydrogen) value by using an alkaline solution; adding phosphate or phosphoric acid, dispersing and carrying out grinding treatment; heating and raising the temperature; adding an acidic aluminum salt compound or an alkaline aluminum salt compound; meanwhile, adding inorganic acid or inorganic alkali and maintaining the pH value of the slurry; curing to form a first layer of a hydrated alumina covering layer on the surface of a titanium dioxide particle; continuously adding the inorganic acid or the inorganic alkali, adjusting the pH value and curing; washing by using de-ionized water and filtering; adding modified polysiloxane into a filtering cake; dispersing at a high speed to form a second layer of an organic silicon covering layer on the hydrated alumina covering layer; and drying and carrying out air-powder treatment to obtain the special type titanium dioxide pigment for the plastic color master batch. The preparation method disclosed by the invention has the advantages that the combination property is good; the dry powder mobility, the dispersity, the covering capability, the machining plasticization performance, the light resistance and the heat resistance achieve the level of special titanium dioxide for an international color master batch; and the application prospect is wide.

Description

technical field [0001] The invention relates to a preparation method of a special-purpose titanium dioxide pigment for plastic color master batches. Background technique [0002] Titanium dioxide is an important fine chemical raw material in the chemical and light chemical industries. Due to its high refractive index, strong tinting power, good gloss, high whiteness, strong dispersibility, and strong weather resistance, titanium dioxide is known as the "king of white pigments". Therefore, it is widely used in coatings, plastics, In industrial production such as paper making, rubber, chemical fiber, etc. With the rapid development of my country's plastics industry, especially the development of industries such as automobiles, household appliances and daily consumer goods, people's requirements for colored products have been further improved. Masterbatch coloring has become the main coloring method of plastics and is widely used. [0003] Titanium dioxide is a hydrophilic su...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/12C09C3/04
Inventor 王建伟杜凤刘立新腾巍王伟楠马玉杰
Owner 中信钛业股份有限公司
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