Calcium carbonate modifier and preparation method thereof

A technology of calcium carbonate and surface modifier, which is applied to the preparation of carboxylic anhydride, the treatment of dyed low-molecular organic compounds, and fibrous fillers. The effect of broad application prospects, improved interface function, and easy promotion and implementation

Inactive Publication Date: 2010-03-17
ZHANGJIAJIE HENGLIANG MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of calcium carbonate surface modifiers, but due to the complicated process and high cost, most of them only stay in the research stage
At present, the most widely used is stearic acid, which contains only one carboxyl group in its molecule, and has few action points. When modifying calcium carbonate, it is mostly physical action, and the coating is not firm and easy to fall off, so the modification effect is not ideal.

Method used

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  • Calcium carbonate modifier and preparation method thereof
  • Calcium carbonate modifier and preparation method thereof
  • Calcium carbonate modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 20.0g of tungoleic acid into the three-necked flask, heat it to 65°C to a constant temperature under constant stirring, and start adding 2.8g of maleic anhydride. Thick citronic anhydride product, taking the percentage content of free acid as the test index, the reaction degree is >96%. Dissolve citronic anhydride in acetone of equal mass to form an acetone solution, add water equal to the molarity of the anhydride, and let it stand for 30 minutes to obtain citronic anhydride hydrolyzate.

Embodiment 2

[0029] Add 20.0g of tungoleic acid into the three-neck flask, heat it to 65°C to a constant temperature under constant stirring, start to add 3.4g of maleic anhydride, when the maleic anhydride is completely dissolved, raise the temperature to about 100°C, and react for 100min to obtain tungic anhydride The product, taking the percentage content of free acid as an inspection index, has a reaction degree>96%. Dissolve citronic anhydride in acetone of equal mass to form an acetone solution, add water equal to the molarity of the anhydride, and let it stand for 30 minutes to obtain citronic anhydride hydrolyzate.

[0030] Use the dry method of citronic anhydride hydrolyzate to treat calcium carbonate, add 100g of heavy calcium carbonate dry powder into the high-speed disperser, raise the temperature to 50°C, add dropwise 3.0g of citronic anhydride hydrolyzate in acetone solution, and mix and stir for 15 minutes after dropping After the coating is completed, it is dried to a const...

Embodiment 3

[0032] Add 20.0g of oleic acid into the three-neck flask, heat it to 65°C to a constant temperature under constant stirring, start to add 3.6g of maleic anhydride, when the maleic anhydride is completely dissolved, raise the temperature to about 90°C, and react for 120 minutes to obtain lycic anhydride The product, taking the percentage content of free acid as an inspection index, has a reaction degree>96%. Dissolve citronic anhydride in acetone of equal mass to make an acetone solution, add water equal in molarity to the anhydride, and let it stand for 30 minutes to obtain citronic anhydride hydrolyzate.

[0033] The dry processing calcium carbonate method of the citronic anhydride hydrolyzate is the same as embodiment 2.

[0034] The modified calcium prepared in Example 3 was extracted with organic solvent for 6 hours, filtered and dried, and carried out thermogravimetric test with non-extracted modified calcium, the results were as follows: figure 1 shown. The thermal wei...

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Abstract

The invention provides a calcium carbonate modifier and a preparation method thereof. The calcium carbonate modifier is eleostearic acid estolide hydrolysate, which is prepared by taking eleostearic acid and maleic anhydride as materials to directly synthesize eleostearic acid estolide by one-step procedure and using a proper amount of water to hydrolyze the eleostearic acid estolide. The invention has the advantages of simple production process, low production cost, high yield, easy popularization and the like. The calcium carbonate modifier has more action points and can chemically react with calcium carbonate, thereby having better effect than the traditional stearic acid modifier.

Description

technical field [0001] The invention relates to a calcium carbonate modifier, more specifically, a calcium carbonate modifier containing three carboxyl groups and a preparation method thereof. Background technique [0002] Calcium carbonate is often used to fill plastic materials due to its good stability, wide range of sources, and low price, which can increase capacity, increase volume, and reduce production costs. However, because its surface is hydrophilic and oleophobic and is easy to agglomerate, it has different interfacial properties with organic polymers and poor compatibility. Direct or excessive filling will easily lead to a decrease in the mechanical properties of the material. Through surface modification, its surface properties can be improved, and the comprehensive properties such as dispersibility, compatibility with the polymer interface and mechanical strength of the material can be improved. There are many kinds of calcium carbonate surface modifiers, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C07C61/35C07C51/087C08K9/04
Inventor 邓剑如毛萃刘祥
Owner ZHANGJIAJIE HENGLIANG MINING
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