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Method for preparing toughening calcium carbonate composite powder for sheet molding compound (SMC)

A technology of calcium carbonate and composite powder, which is applied in chemical instruments and methods, dyeing low-molecular organic compound treatment, dyeing high-molecular organic compound treatment, etc., can solve the problems of lack of functionality, improve curing performance, and increase filling. Effects of container cost and shrinkage reduction

Active Publication Date: 2014-03-19
ANHUI JIANGDONG TECH POWDER CO LTD
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AI Technical Summary

Problems solved by technology

There are also people who generate nano-calcium carbonate on the surface of heavy calcium carbonate by carbonization, and then modify it with a coupling agent, but none of them have a functional purpose.

Method used

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Examples

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Embodiment Construction

[0022] The present invention will be further described in detail according to the examples below.

[0023] The present invention, the preparation method of toughened calcium carbonate composite powder for SMC, its steps are as follows:

[0024] (1) Calcite raw ore is washed, air-dried and pulverized;

[0025] (2) Use a vibrating sieve to perform primary classification and removal of impurities on the pulverized powder, and reclassify powders with different particle size distributions by adjusting the cyclone classification parameters to an average particle size of less than 5 microns and a d97 of less than 18 microns;

[0026] (3) In terms of weight percentage, 30% to 65% of classified and impurity-removed powder, 3% to 25% of magnesium oxide powder, 1% to 10% of high molecular weight hydroxyphenylbenzotriazole ultraviolet absorber, 1%~10% powdered nitrile rubber is mixed, stirred and ground;

[0027] (4) Put the ground mixture in the all-in-one machine for dispersing and mo...

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Abstract

The invention discloses a method for preparing toughening calcium carbonate composite powder for a sheet molding compound (SMC). The method comprises the following steps of: washing calcite raw ores, airing, and crushing; grading by a vibrating screen; mixing for preparing; wrapping; drying; and modifying The method has the advantages that compared with those of the ordinary product, the toughness of the toughening calcium carbonate composite powder which is produced by the method can be improved by more than 20 percent, and the contractibility rate can be reduced by 30 percent; and the curing performance, anti-aging performance and surface quality of products can be improved.

Description

technical field [0001] The invention relates to a preparation method of toughened calcium carbonate composite powder for SMC, and belongs to the technical field of chemical material production and manufacturing. Background technique [0002] Calcium carbonate is a non-metallic inorganic filler with the largest amount and widest application. Due to its wide range of raw materials, low price, non-toxicity and high whiteness, it is widely used in plastics, rubber, papermaking, coatings and other fields. Due to the large reserves, good quality, broad market and good development space of calcium carbonate in China, the output and demand of calcium carbonate in China have increased rapidly in the past two decades, but most of them are used as ordinary fillers. Use, the pertinence of the product is not strong, generally belongs to the low-grade product, the performance improvement of the product is limited, so there are problems such as low added value of the product. Therefore, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/08C09C3/10C09C3/06
Inventor 胡坤乐毅乐力
Owner ANHUI JIANGDONG TECH POWDER CO LTD
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