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Method for preparing high-dispersibility composite titanium dioxide pigment

A titanium dioxide, high dispersibility technology, applied in chemical instruments and methods, inorganic pigment treatment, dyed low molecular organic compound treatment, etc. To achieve the effect of long-term maintenance of whiteness, high reproducibility and good adhesion

Inactive Publication Date: 2018-03-06
安徽格锐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase in the use of titanium dioxide pigments and the amount of use, the demand for titanium dioxide as a raw material also increases. However, in the production process of titanium dioxide, there are problems of limited mineral resources and large discharge of waste water and waste. Therefore, in recent years, titanium dioxide pigments The price increases year by year
Titanium dioxide pigment has strong covering power, but its dispersibility and light resistance are poor, so the proportion of titanium dioxide pigment used is relatively large, and traditional titanium dioxide pigment will appear yellowing and discoloration under long-term light conditions, which will affect its Decorative and protective properties
Patent application publication number: CN105086523 A discloses a preparation method of highly dispersible titanium dioxide pigment, which uses silicon dioxide and aluminum oxide to coat the surface of titanium dioxide successively, so that titanium dioxide has higher dispersibility and light resistance, however This coating method increases the overall particle size of titanium dioxide, and the coating process is complicated, which increases the uncertainty in the production of titanium dioxide pigments, and thus the produced titanium dioxide pigments have poor reproducibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of a kind of highly dispersed composite titanium dioxide pigment that the present invention proposes comprises the following steps:

[0020] S1, drying mica powder, grinding, and passing through a 200-mesh sieve to obtain the processed mica powder for subsequent use;

[0021] S2. Add the treated mica powder prepared in step S1 to the titanium dioxide dispersion slurry, and stir at a speed of 450 r / min at 78°C. After the reaction is complete, centrifuge, discard the supernatant, and rinse the precipitate with water. Then perform centrifugation at a speed of 1500r / min and a centrifugation temperature of 10-30°C, discard the supernatant after centrifugation, then dry and calcinate the precipitate to obtain a composite titanium dioxide dry cake;

[0022] S3. Grinding, ultrasonicating, and sieving the composite titanium dioxide dry cake to obtain composite titanium dioxide powder, which is set aside;

[0023] S4, mixing N-(β-aminoethyl)-γ-aminopropyl-...

Embodiment 2

[0027] The preparation method of a kind of highly dispersed composite titanium dioxide pigment that the present invention proposes comprises the following steps:

[0028] S1, drying mica powder, grinding, and passing through a 200-mesh sieve to obtain the processed mica powder for subsequent use;

[0029] S2. Add the treated mica powder prepared in step S1 to the titanium dioxide dispersion slurry, and stir at 86° C. at a speed of 420 r / min. After the reaction is complete, centrifuge, discard the supernatant, and rinse the precipitate with water. Then perform centrifugation at a speed of 2000r / min and a centrifugation temperature of 10-30°C, discard the supernatant after centrifugation, then dry and calcinate the precipitate to obtain a composite titanium dioxide dry cake;

[0030] S3. Grinding, ultrasonicating, and sieving the composite titanium dioxide dry cake to obtain composite titanium dioxide powder, which is set aside;

[0031] S4, mixing N-(β-aminoethyl)-γ-aminopropy...

Embodiment 3

[0035] The preparation method of a kind of highly dispersed composite titanium dioxide pigment that the present invention proposes comprises the following steps:

[0036] S1, drying mica powder, grinding, and passing through a 200-mesh sieve to obtain the processed mica powder for subsequent use;

[0037] S2. Add the treated mica powder prepared in step S1 to the titanium dioxide dispersion slurry, and stir at a speed of 480 r / min at 72°C. After the reaction is complete, centrifuge, discard the supernatant, and rinse the precipitate with water. Then perform centrifugation at a speed of 2000r / min and a centrifugation temperature of 10-30°C, discard the supernatant after centrifugation, then dry and calcinate the precipitate to obtain a composite titanium dioxide dry cake;

[0038] S3. Grinding, ultrasonicating, and sieving the composite titanium dioxide dry cake to obtain composite titanium dioxide powder, which is set aside;

[0039] S4, mixing N-(β-aminoethyl)-γ-aminopropyl-...

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PUM

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Abstract

The invention discloses a method for preparing a high-dispersibility composite titanium dioxide pigment. The method comprises the following steps: S1, treating mica powder; S2, putting the treated mica powder into titanium dioxide dispersed slurry, performing heating stirring, centrifuging, removing supernate, drying precipitate, and calcining so as to obtain composite titanium dioxide cakes; S3,treating the composite titanium dioxide cakes; S4, mixing N-(beta-aminoethyl)-gamma-aminopropyl-methyl-trimethoxy silane, vinyl trichlorosilane, sodium dodecyl benzene sulfonate and di-butyl naphthalene sulfonate so as to obtain a modification liquid; and S5, putting the composite titanium dioxide powder into the modification liquid, performing heating stirring, cooling to the room temperature, centrifuging, performing vacuum drying, and performing ultrasonic crushing, thereby obtaining the high-dispersibility composite titanium dioxide pigment. The method disclosed by the invention is simpleto operate, high in repetition rate and small in amount of titanium dioxide, and the composite titanium dioxide pigment prepared by using the method is small in granule size, high in whiteness degree,good in adhesion property and excellent in dispersibility.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide preparation, in particular to a method for preparing a high-dispersibility composite titanium dioxide pigment. Background technique [0002] Titanium dioxide pigment is a white pigment mainly composed of titanium dioxide, which is widely used in coatings, plastics, papermaking, ink, ceramics and other fields. With the increase in the use of titanium dioxide pigments and the amount of use, the demand for titanium dioxide as a raw material also increases. However, in the production process of titanium dioxide, there are problems of limited mineral resources and large discharge of waste water and waste. Therefore, in recent years, titanium dioxide pigments prices are increasing year by year. Titanium dioxide pigment has strong covering power, but its dispersibility and light resistance are poor, so the proportion of titanium dioxide pigment used is relatively large, and traditional titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/08C09C3/12
CPCC09C1/3692C09C1/3623C09C1/363C09C1/3669C09C1/3684C09C3/006C09C3/08C09C3/12
Inventor 柴修安朱朋利刘立丰王家俊
Owner 安徽格锐新材料科技有限公司