Preparation method of aluminum silicate-white carbon black composite filler

A composite filler and white carbon black technology, applied in the direction of aluminum silicate, silicate, nanotechnology for materials and surface science, etc., can solve the problem of uneven primary particle size of silica, agglomeration of silica particles, Wide pore size distribution and other issues, to achieve the effect of improving the hiding power of the dry film, improving the whiteness, and improving the whiteness

Active Publication Date: 2020-08-14
FUJIAN ZHENGSHENG INORGANIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reaction process, the concentration of the base base gradually changes from high to low, and the pH of the reaction system changes accordingly. The size of the primary silica particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of aluminum silicate-white carbon black composite filler of the present invention operates according to the following steps:

[0026] A. Synthesis of sodium aluminosilicate nano cores by homogeneous precipitation

[0027] A1. Add 20L of water into a 50L reaction kettle, and add 100mL of sodium silicate, and raise the temperature to 80°C by feeding steam while stirring. Add sodium silicate and sulfuric acid to react simultaneously, the feeding time of sodium silicate and sulfuric acid is 30min, the concentration of described sodium silicate is 1.0mol / L, and flow velocity is 5mL / min; The mass fraction of described sulfuric acid is 30.0%, The flow rate is 2.0mL / min, so that the reaction solution is controlled at pH=10.0;

[0028] A2. After aging for 30 minutes, add aluminum sulfate solution to continue the reaction. The flow rate of the aluminum sulfate is 2.0mL / min, and the mass fraction is 30%. The feeding time is 60 minutes, and then 10% am...

Embodiment 2

[0035] Other steps and process parameters are the same as in Example 1, and the difference from Example 1 is that the parallel flow reaction time of sodium silicate and sulfuric acid in step A1 is 60min.

Embodiment 3

[0037] Other steps and process parameters are the same as in Example 1, except that the reaction temperature of the synthesis of the silica-coated shell by the B-stage precipitation method is 85°C.

[0038] The comprehensive chemical performance index of the aluminum silicate / silica composite filler product that above three examples make and the analysis of commercially available aluminum silicate (comparative example 1), commercially available white carbon black (comparative example 2) are shown in Table 1:

[0039] Table 1 Comprehensive chemical indicators of each product

[0040] Technical Indicator Items Example 1 Example 2 Example 3 Comparative example 1 Comparative example 2 BET, m 2 / g

375 350 325 168 175 Particle size D 50 , μm

6.5 7.0 6.8 13.8 12.8 DBP, g / 100g 295 292 295 215 223 Pore ​​volume, ml / g 2.35 2.42 2.33 1.22 1.25 60° Gloss 23.5 24.4 24.8 23.1 21.8 BaiDu 96 96 96 94 90 ...

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PUM

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Abstract

The invention discloses a preparation method of an aluminum silicate-white carbon black composite filler. The preparation method comprises the following steps: adding water and a silicon compound intoa reaction kettle, stirring, heating to 60-90 DEG C, and adding the silicon compound and an acidifying agent to react until the pH value of the reaction solution is 8.0-11.0; after curing, adding analuminum compound solution to continuously react, adding a precipitator to generate sodium aluminosilicate gel, and then continuously curing to obtain a sodium aluminosilicate nanoparticle suspension;adding a silicon compound into the suspension; stirring to make pH equal to 8-11, heating to 60-90 DEG C to obtain a silica reaction substrate, adding a silicon compound and an acidifying agent for 1-2 hours at the same time, wherein the pH value is maintained to be 8-11, stopping adding the silicon compound after slurry of the nano sodium aluminosilicate-white carbon black composite filler is obtained, continuously adding the acidifying agent until the pH value is 3.0-6.0, and stopping adding so as to obtain a suspension of the nano sodium aluminosilicate-white carbon black composite filler;and filtering, washing and high-temperature quick-drying the suspension to obtain the nano sodium aluminosilicate core and silicon dioxide coated shell composite filler with high extinction efficiency, good dispersity and storage stability.

Description

technical field [0001] The invention relates to a method for preparing a powder inorganic material, in particular to a method for preparing a nano-aluminum silicate-white carbon black composite filler. Background technique [0002] Aluminum silicate, also known as sodium aluminosilicate, is a functional silicate product with a small primary particle size (1um ~ 10um), very fine particles and excellent suspension. It is a kind of silicic acid, A composite powder material generated in situ from the sodium salt of aluminate. Sodium aluminosilicate is a white powder with a special appearance. Compared with expensive titanium dioxide, it has similar performance in many application fields. Adding sodium aluminosilicate to latex paint can not only save 15-25% titanium dioxide, and a lot of cost savings; and because of its developed pore structure, strong moisture absorption and ultra-high whiteness, it has been used in pesticides instead of silicon dioxide in recent years, and the...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/34C08K3/36C08K7/26C09D7/42C09D7/62C08L21/00C08L83/04C01B33/26C01B33/12B82Y40/00B82Y30/00
CPCC08K9/10C08K3/34C08K3/36C08K7/26C09D7/42C09D7/62C01B33/26C01B33/12B82Y40/00B82Y30/00C08K2201/011C01P2006/12C01P2004/61C01P2006/14C01P2006/60C01P2006/19C08L21/00C08L83/04
Inventor 任立荣曾志恩田明徐钰兴徐功智黄宇刘安基黄永生罗明辉谢志雄王锦春乐秋林
Owner FUJIAN ZHENGSHENG INORGANIC MATERIAL
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