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Processing technology of modified calcium carbonate

A processing technology, calcium carbonate technology, applied in dyeing low-molecular organic compound treatment, fibrous filler, coating, etc., can solve the problems of material performance degradation, poor binding force of base material, difficulty in uniform dispersion, etc., and achieve improved dispersion , good adsorption, high activation effect

Inactive Publication Date: 2016-11-16
ANHUI HUAYU PIPELINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of calcium carbonate is hydrophilic and oleophobic, and has strong polarity. It is difficult to disperse uniformly in organic media, and the binding force with the base material is poor, which will easily cause interface defects and lead to material performance degradation; the smaller the particle size of calcium carbonate particles, the better the surface. The more atoms on the surface, the higher the surface energy, the stronger the adsorption, and it is in a thermodynamically unstable state. The particles are easy to agglomerate and cannot be well dispersed in the polymer matrix.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of processing technology of modified calcium carbonate, comprises the following steps:

[0017] S1. Select 90 parts of calcium carbonate, 1.5 parts of titanate coupling agent, and 2 parts of stearic acid according to parts by mass; the titanate coupling agent is chelating titanate coupling agent KR-201; the mesh number of calcium carbonate 2000 mesh;

[0018] S2. Put calcium carbonate into a high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 5 minutes;

[0019] S3. Put the titanate coupling agent into the high-speed mixer, activate the calcium carbonate at a temperature of 110°C for 10 minutes, and then add stearic acid for modification treatment for 20 minutes; the speed of the high-speed mixer is 2000r / min;

[0020] S4. Discharge the modified calcium carbonate from the high-speed mixer at 110° C., and cool to obtain powdery hydrophobic calcium carbonate with high activation degree and good dispersibility.

Embodiment 2

[0022] A kind of processing technology of modified calcium carbonate, comprises the following steps:

[0023] S1. Select 110 parts of calcium carbonate, 2.5 parts of titanate coupling agent, and 3 parts of stearic acid according to parts by mass; the titanate coupling agent is chelating titanate coupling agent KR-201; the mesh number of calcium carbonate 2000 mesh;

[0024] S2. Put calcium carbonate into a high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 10 minutes;

[0025] S3. Put the titanate coupling agent into the high-speed mixer, activate the calcium carbonate at a temperature of 130°C for 5 minutes, and then add stearic acid for modification treatment for 10 minutes; the speed of the high-speed mixer is 3000r / min;

[0026] S4. Discharge the modified calcium carbonate from the high-speed mixer at 110° C., and cool to obtain powdery hydrophobic calcium carbonate with high activation degree and good dispersibility.

Embodiment 3

[0028] A kind of processing technology of modified calcium carbonate, comprises the following steps:

[0029] S1. Select 100 parts of calcium carbonate, 2 parts of titanate coupling agent, and 2.5 parts of stearic acid according to parts by mass; the titanate coupling agent is chelating titanate coupling agent KR-201; the mesh number of calcium carbonate 2000 mesh;

[0030] S2. Put calcium carbonate into a high-speed mixer, heat up and mix, wait until the temperature reaches 100°C, and remove water for 8 minutes;

[0031] S3. Put the titanate coupling agent into the high-speed mixer, activate the calcium carbonate at a temperature of 120°C for 8 minutes, and then add stearic acid for modification treatment for 15 minutes; the speed of the high-speed mixer is 2500r / min;

[0032] S4. Discharge the modified calcium carbonate from the high-speed mixer at 110° C., and cool to obtain powdery hydrophobic calcium carbonate with high activation degree and good dispersibility.

[0033...

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Abstract

The invention discloses a processing technology of modified calcium carbonate. The processing technology includes the following steps that 1, by mass, 90-110 parts of calcium carbonate, 1.5-2.5 parts of a titanate coupling agent and 2-3 parts of stearic acid are selected; 2, calcium carbonate is put into a high-speed mixer, heating and mixing are carried out, and dewatering is carried out for 5-10 min when the temperature reaches 100 DEG C; 3, the titanate coupling agent is put into the high-speed mixer, calcium carbonate is activated for 5-10 min at 110-130 DEG C, and stearic acid is added for 10-20 min of modification treatment; 4, modified calcium carbonate is discharged out of the high-speed mixer at 110 DEG C and cooled, and powdery hydrophobic calcium carbonate with a high activation degree and good dispersity is obtained. According to the processing technology of modified calcium carbonate, the dispersity of modified calcium carbonate is improved, the surface of calcium carbonate is hydrophobic, and modified calcium carbonate has good adsorbability.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate production and processing, in particular to a processing technology for modified calcium carbonate. Background technique [0002] Calcium carbonate can be used as a white pigment in the paint and acts as a skeleton. The filling of calcium carbonate can enhance the deposition and permeability of the primer to the surface of the base. At present, the calcium carbonate produced by Shiraishi Company of Japan and Sim Company of Italy is mainly suitable for improving the performance of water-based coatings. However, the surface of calcium carbonate is hydrophilic and oleophobic, and has strong polarity. It is difficult to disperse uniformly in organic media, and the binding force with the base material is poor, which will easily cause interface defects and lead to material performance degradation; the smaller the particle size of calcium carbonate particles, the better the surface. The more a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09D7/12
CPCC09C1/021C09C3/08C09D7/62
Inventor 吴跃强
Owner ANHUI HUAYU PIPELINE MFG
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