Modified calcium carbonate and preparation method thereof

A calcium carbonate and modification technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing low molecular organic compound treatment, etc., can solve the problem of uneven dispersion of high polymers, poor direct application effect, easy formation of aggregates, etc. problem, to achieve the effect of enhancing the interface effect, easy to promote, and good suspension stability

Inactive Publication Date: 2015-09-23
安徽雪城超细碳酸钙有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the products, and reduce the cost, but its surface has a strong hydrophilic hydroxyl group, showing a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in Partially dispersed in the polymer is not uniform, resulting in interface defects between the two materials, the

Method used

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[0012] Specific implementation plan

[0013] The present invention will be described in detail below through specific examples.

[0014] A modified calcium carbonate and a preparation method thereof, prepared from the following parts by weight (kg) of raw materials: calcium carbonate 150, sodium oleate 47, sodium dodecylbenzene sulfonate 0.7, sodium bicarbonate 2, styrene 6. Potassium persulfate 0.05, fumed silica 5, organic bentonite 3, polyimide 3, ammonium bicarbonate 0.8, high wear-resistant carbon black 3, deionized water;

[0015] The modified calcium carbonate and the preparation method thereof of the present invention are prepared by the following specific steps:

[0016] (1) Dissolve sodium oleate and deionized water to make a 1% sodium oleate aqueous solution, stir it electrically for 10 minutes and raise the temperature to 60°C, add calcium carbonate and stir for 1.5 hours, after stirring, let it stand for 6 hours and then suction , Washed with deionized water, dried in an...

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Abstract

The invention discloses modified calcium carbonate and a preparation method thereof. The modified calcium carbonate is characterized by being prepared from the following raw materials in parts by weight: 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 part of sodium dodecyl benzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 part of potassium persulfate, 3-5 parts of fumed silica, 2-3 parts of organic bentonite, 2-3 parts of polyimide, 0.4-1 part of ammonium bicarbonate, 2-4 parts of high abrasion furnace black and a proper amount of deionized water. The added polyimide, ammonium bicarbonate and high abrasion furnace black are combined with calcium carbonate to enable calcium carbonate to be wear-resistant in surface, lipophilic and hydrophobic, and have the fire-extinguishing property and other properties, the modified calcium carbonate has relatively good compatibility with polymers, and the interface effect is enhanced. The modified calcium carbonate has the advantages of simple modification process, relatively low cost, zero pollution, easy popularization and wide application prospect.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate and a preparation method thereof. Background technique [0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It presents a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. The effect of direct application is not good, and calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, in order to improve the reinforcing effect of calcium carbonate ...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C09C3/06C09C3/10
Inventor 窦念根
Owner 安徽雪城超细碳酸钙有限公司
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