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Production method of nanometer calcium carbonate for electronic glue

A technology of nano-calcium carbonate and production method, which is applied in the direction of calcium carbonate/strontium/barium, nanotechnology, dyeing low-molecular organic compound treatment, etc. It can solve the problems of poor reproducibility of nano-calcium carbonate and unstable product quality, and achieve industrial It is easy to achieve, realize the effect of nucleation rate and optimize the reaction speed

Inactive Publication Date: 2014-01-15
SHANXI LANHUA HUAMING NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a production method of nano-calcium carbonate for electronic glue, which solves the problems of poor reproducibility and unstable product quality of nano-calcium carbonate existing in the existing preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the first step, add 35 cubic meters of Ca(OH) to a carbonization reactor with a diameter of 3 meters and a height of 6 meters 2 Suspension, Ca(OH) 2 The mass concentration of the suspension is 7.92%;

[0020] The second step, adjust Ca(OH) 2 The temperature of the suspension is up to 22°C;

[0021] The third step is to feed CO into the reactor at a rate of 0.6 cubic meters per second 2 gas, CO 2 The gas is CO 2 Gas concentration is 35% CO by volume 2 gas. After 7 minutes Ca(OH) 2 The carbonization rate of the suspension reaches 10%. Add 70 kg of polysaccharides and continue carbonization until Ca(OH) 2 The pH value of the suspension is 6.85, and nano-scale cubic calcium carbonate is generated, and the temperature at the end of the reaction is 62°C.

[0022] The fourth step, in Ca(OH) 2 Add 5Kg polyacrylate to the suspension;

[0023] The 5th step, configure 170 kilograms of fatty acids into 10% aqueous solution coating agent;

[0024] The sixth step is to...

Embodiment 2

[0027] The first step is to add 30 cubic meters of Ca(OH) to a carbonization reactor with a diameter of 3 meters and a height of 6 meters. 2 Suspension, Ca(OH) 2 The mass concentration of the suspension is 8.0%;

[0028] The second step, adjust Ca(OH) 2 The temperature of the suspension is up to 24°C;

[0029] The third step is to feed CO into the reactor at a rate of 0.3 cubic meters per second 2 gas, CO 2 The gas is CO 2 The gas concentration is 60% CO by volume 2 Gas, over 4 minutes Ca(OH) 2 The carbonization rate of the suspension reaches 10%. Add 35 kg of polysaccharide and continue carbonization until Ca(OH) 2 The pH value of the suspension is 6.78, and nano-scale cubic calcium carbonate is generated, and the temperature at the end of the reaction is 63°C;

[0030] The fourth step, in Ca(OH) 2 Add 6Kg polyacrylate to the suspension;

[0031] The 5th step, configure 150 kilograms of fatty acids into 10% aqueous solution coating agent;

[0032] The sixth step is...

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Abstract

The invention relates to a production method of nanometer calcium carbonate for electronic glue, and solves the problems of poor quality reproducibility and instable quality of nanometer calcium carbonate products in the existing preparation method. The method comprises the following steps: Ca(OH)2 suspension taking 40-60% of the volume of a reaction kettle is added in the carburization reaction kettle; the mass concentration of the Ca(OH)2 suspension is 6-9%; the temperature of the Ca(OH)2 suspension is regulated to be 22-30 DEG C, so that the stirring speed of the Ca(OH)2 suspension is higher than 100 r / m, and the speed of a stirring wire at the tail end of a stirrer is higher than 15 m / s; CO2 gas is led in the carburization reaction kettle by the speed of 0.3-0.7 m<3> / s; a dispersing agent taking 0.05-0.25% of total mass of Ca(OH)2 is added in the Ca(OH)2 suspension; one or two of fatty acid or water-soluble phthalate ester coupling agents are prepared into a water solution coating agent; nanometer calcium carbonate slurry is heated to 65-75 DEG C; then the coating agent is added in the slurry; and the mixing time is 1-3 hours. The production method has the advantages of short reaction time and high product quality reproducibility, and industrialization is easy to achieve.

Description

technical field [0001] The invention relates to a preparation method of calcium carbonate, in particular to an industrial preparation method of nanometer calcium carbonate for electronic glue. Background technique [0002] Nano-calcium carbonate refers to ultra-fine powder with a particle size of less than 100 nanometers. Nano-active calcium carbonate refers to a functional filler that changes from hydrophilic to lipophilic after surface organic treatment of calcium carbonate. This product can be widely used in automobile underbody Paint, rubber, plastic and other industries. Electronic glue presents the nature of liquid before it is cured, has fluidity, and can be cured at room temperature. After packaging electronic components, it can play the roles of waterproof, moisture-proof, dust-proof, insulation, heat conduction, confidentiality, corrosion resistance, temperature resistance, and shock resistance. The quality of the glue must meet the requirements of good thixotropy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00C09C1/02C09C3/08
Inventor 段秀红沈晓峰马建民郭俊凌
Owner SHANXI LANHUA HUAMING NANO MATERIALS
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