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Heavy calcium carbonate composite filler and preparation method thereof

A technology of heavy calcium carbonate and composite fillers, which is applied in the direction of fibrous fillers, chemical instruments and methods, and inorganic pigment treatment. Effect of reducing surface polarity and improving dispersibility

Pending Publication Date: 2022-06-24
广西凤山宏泰矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ground calcium carbonate is a non-metallic mineral powder with high mineral reserves, wide sources and low price. Compared with other inorganic powders, it has high whiteness, simple processing, stable composition, low hardness, non-toxic and non-irritating. It is widely used in rubber, paper making, plastics, construction, coatings and other industries, however, heavy calcium carbonate will make Ca in the process of mechanical crushing 2+ and CO 3 2- The unsaturated particles are exposed, and it is easy to react with water molecules to generate hydroxyl groups, making the ground calcium carbonate hydrophilic. In actual use, heavy calcium carbonate is usually used to enhance the mechanical properties of organic polymers. Organic polymers are hydrophilic Hydrophobic properties of oil, the opposite surface properties of the two lead to poor compatibility of ground calcium carbonate in the organic polymer matrix, and the weak binding force between the ground calcium carbonate and the organic polymer interface makes the polymer matrix composites easy to produce during use. Interface defects, performance decline; some heavy calcium carbonate powders increase in particle size, and when the particle size is too large, it will cause an effect similar to agglomeration, thereby reducing the performance of the composite

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  • Heavy calcium carbonate composite filler and preparation method thereof
  • Heavy calcium carbonate composite filler and preparation method thereof
  • Heavy calcium carbonate composite filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A heavy calcium carbonate composite filler, comprising the following raw materials in parts by mass: 100 parts of heavy calcium carbonate, 40 parts of ethanol, 1.5 parts of magnesium stearate, 30 parts of graphene dispersion, 10 parts of super dispersant, composite surface 2.5 parts of modifier;

[0032] The preparation method of described ground calcium carbonate composite filler, comprises the following steps:

[0033] Step 1: Take heavy calcium carbonate in parts by mass and add it to the ball milling tank of the vertical stirring ball mill, add ethanol in parts by mass, add zirconia balls, and perform ball milling. Set the stirring speed to 300r / min, and the ball milling time to 20min ;

[0034] Step 2: Control the temperature of the ball mill tank to 80°C by constant temperature circulating water, add the composite surface modifier in parts by mass, and mill for 15 minutes at a stirring speed of 300r / min; add magnesium stearate in parts by mass, continue to 300r / ...

Embodiment 2

[0037] A heavy calcium carbonate composite filler, comprising the following raw materials in parts by mass: 140 parts of heavy calcium carbonate, 60 parts of ethanol, 4 parts of magnesium stearate, 50 parts of graphene dispersion, 40 parts of super dispersant, composite surface 6 parts of modifier;

[0038] The preparation method of described ground calcium carbonate composite filler, comprises the following steps:

[0039]Step 1: Take heavy calcium carbonate in parts by mass and add it to the ball milling tank of the vertical stirring ball mill, add ethanol in parts by mass, add zirconia balls, and perform ball milling. Set the stirring speed to 600r / min, and the ball milling time to 30min ;

[0040] Step 2: Control the temperature of the ball milling tank to 95°C through constant temperature circulating water, add a composite surface modifier in parts by mass, and mill for 30 minutes at a stirring speed of 600r / min; add magnesium stearate in parts by mass, and continue to ...

Embodiment 3

[0043] A heavy calcium carbonate composite filler, comprising the following raw materials in parts by mass: 120 parts of heavy calcium carbonate, 50 parts of ethanol, 3 parts of magnesium stearate, 40 parts of graphene dispersion, 25 parts of super dispersant, composite surface Modifier 4 parts;

[0044] The preparation method of described ground calcium carbonate composite filler, comprises the following steps:

[0045] Step 1: Take heavy calcium carbonate in parts by mass and add it to the ball milling tank of the vertical stirring ball mill, add ethanol in parts by mass, add zirconia balls, and carry out ball milling, set the stirring speed to 400r / min, and the ball milling time to 25min ;

[0046] Step 2: Control the temperature of the ball mill tank to 90°C through constant temperature circulating water, add the composite surface modifier in parts by mass, and mill for 25 minutes at a stirring speed of 500r / min; add magnesium stearate in parts by mass, and continue to W...

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Abstract

The invention relates to the technical field of composite fillers, in particular to a heavy calcium carbonate composite filler and a preparation method thereof. Comprising the following raw materials in parts by mass: 100-140 parts of heavy calcium carbonate, 40-60 parts of ethanol, 1.5-4 parts of magnesium stearate, 30-50 parts of graphene dispersion liquid, 10-40 parts of a super dispersant and 2.5-6 parts of a composite surface modifier. Heavy calcium carbonate is used as a raw material, ethyl alcohol is used as a primary dispersing agent, a composite surface modifier, magnesium stearate and graphene dispersion liquid are used as modifiers, a super dispersing agent is used as a secondary dispersing agent, the heavy calcium carbonate is modified through a wet ball milling method, the composite surface modifier and magnesium stearate are grafted on the surface of the heavy calcium carbonate, and the graphene modified heavy calcium carbonate is obtained. The graphene is distributed in the gap between the heavy calcium carbonate and the composite surface modifier, so that the dispersity of the heavy calcium carbonate composite filler is improved, agglomeration is not easy to generate, the particle size is small and uniform, the strength is increased, the applicability is higher, and meanwhile, the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of composite fillers, in particular to a heavy calcium carbonate composite filler and a preparation method thereof. Background technique [0002] Ground calcium carbonate is a non-metallic mineral powder with high mineral reserves, wide sources and low price. Compared with other inorganic powders, it has high whiteness, simple processing, stable composition, low hardness, non-toxic and non-irritating. It is widely used in rubber, paper making, plastics, construction, coatings and other industries, however, heavy calcium carbonate will make Ca in the process of mechanical crushing 2+ and CO 3 2- The unsaturated particles are exposed, and it is easy to react with water molecules to generate hydroxyl groups, making the ground calcium carbonate hydrophilic. In actual use, heavy calcium carbonate is usually used to enhance the mechanical properties of organic polymers. Organic polymers are hydrophilic Hydropho...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C09C3/10
CPCC09C1/021C09C3/08C09C3/10C09C3/006
Inventor 张福清陆盛英
Owner 广西凤山宏泰矿业有限责任公司
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