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A kind of modified titanium dioxide coated with polyacrylic acid

A technology of polyacrylic acid and titanium dioxide, which is applied in the treatment of dyed polymer organic compounds, inorganic pigments, fibrous fillers, etc., can solve the problems of high equipment cost and complex modification process of chemical fiber titanium dioxide, and achieve good dispersibility, Improves gloss and hiding power, enhances bonding effect

Active Publication Date: 2018-02-16
中钛集团焦作市裕盛钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification process of the chemical fiber titanium dioxide is complicated. It is necessary to firstly disperse the ultrafine titanium dioxide and the surfactant by compressed air, and finally it needs cyclone collision classification, gas-solid and aging separation, and the equipment cost is also high.

Method used

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  • A kind of modified titanium dioxide coated with polyacrylic acid
  • A kind of modified titanium dioxide coated with polyacrylic acid
  • A kind of modified titanium dioxide coated with polyacrylic acid

Examples

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preparation example Construction

[0037] In the embodiment of the present invention, the present invention proposes a preparation method of modified titanium dioxide coated with polyacrylic acid, the method specifically includes the following steps:

[0038] a. Dissolve the polyacrylic acid in the prescribed amount in an organic solvent to prepare feed liquid 1; wherein, the mass ratio of the polyacrylic acid to the organic solvent is 1:1-1.1, and the organic solvent can be in ethanol or propylene glycol at least one of .

[0039] b. Dissolve the prescribed amount of sodium silicate in an organic solvent to prepare feed liquid 2; wherein, the mass ratio of the sodium silicate to the organic solvent is 1:4 to 4.5, and the organic solvent can be ethanol or at least one of propylene glycol.

[0040] c. Take the prescribed amount of untreated titanium dioxide raw material and enter it into the screening device after being pulverized by the superfine pulverization device. The feeding port of the fluidized bed is ...

Embodiment 1

[0049] A preparation method of modified titanium dioxide coated with polyacrylic acid, comprising the following steps:

[0050] a. Mix 150g of polyacrylic acid and 150g of ethanol to prepare feed liquid 1;

[0051] b. Mix 5g of sodium silicate and 20g of propylene glycol to prepare feed liquid 2;

[0052] c. Take 10kg of untreated titanium dioxide raw material and pass it through the superfine pulverization device, then enter the screening device, return the particles with a particle size larger than 300nm to the superfine pulverization device for re-crushing, and pass the particles with a particle size smaller than 300nm through the fluidized bed reactor The feeding port is placed in the cavity of the fluidized bed reactor;

[0053] d. Turn on the vacuum pump, evacuate the fluidized bed reactor, feed nitrogen gas from the gas injection port, control the flow rate through the pressure gauge, adjust the gas flow rate to 4L / min, and keep the titanium dioxide particles in a susp...

Embodiment 2

[0057] A preparation method of modified titanium dioxide coated with polyacrylic acid, comprising the following steps:

[0058] a. Mix 180g of polyacrylic acid and 180g of ethanol to prepare feed liquid 1;

[0059] b. Mix 4g of sodium silicate and 18g of ethanol to prepare feed liquid 2;

[0060] c. Take 10kg of untreated titanium dioxide raw material and pass it through the superfine pulverization device, then enter the screening device, return the particles with a particle size larger than 300nm to the superfine pulverization device for re-crushing, and pass the particles with a particle size smaller than 300nm through the fluidized bed reactor The feeding port is placed in the cavity of the fluidized bed reactor;

[0061] d. Turn on the vacuum pump, evacuate the fluidized bed reactor, feed nitrogen gas from the gas injection port, control the flow rate through the pressure gauge, adjust the gas flow rate to 4.5L / min, and keep the titanium dioxide particles in a suspended s...

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Abstract

The invention provides modified titanium dioxide powder with coated polyacrylic acid and a method for preparing the modified titanium dioxide powder. The modified titanium dioxide powder comprises titanium dioxide powder, polyacrylic acid and adhesive. The method includes coating the polyacrylic acid by the aid of a fluidized bed; drying and treating the titanium dioxide powder, the polyacrylic acid and the adhesive after the polyacrylic acid is coated so as to obtain the modified titanium dioxide powder. The modified titanium dioxide powder and the method have the advantages that excellent covering power and luster of the titanium dioxide powder can be guaranteed, and the modified titanium dioxide powder in organic solvents is excellent in dispersibility; the modified titanium dioxide powder prepared by the aid of the method is high in dispersion stability, easy to operate and high in practicality, and reaction conditions are mild.

Description

technical field [0001] The invention relates to the field of titanium dioxide production, in particular to a modified titanium dioxide coated with polyacrylic acid and a preparation method thereof. Background technique [0002] As a white pigment, titanium dioxide is considered as the best white pigment in the world due to its high refractive index and excellent pigment performance, and is widely used in coatings, plastics, papermaking, ink and other industries. Titanium dioxide has high photocatalytic activity, but there are some lattice defects in titanium dioxide without surface treatment, so that there are many photoactivation points on the particle surface, which can easily cause the degradation of organic medium molecules in the application system, resulting in Chalking, loss of light and other phenomena will seriously affect the service life and performance of the product. In order to improve the performance of titanium dioxide, it is necessary to modify the surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/10C09C3/06C09D7/40C09D133/00
CPCC01P2006/22C09C1/3661C09C1/3676C09C1/3692C09C3/006C09D7/62C09D133/00
Inventor 徐春长
Owner 中钛集团焦作市裕盛钛业有限公司
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