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Method for preparing weather-resistant type heavy calcium carbonate

A heavy calcium carbonate, weather-resistant technology, applied in chemical instruments and methods, fibrous fillers, adhesive additives, etc., can solve problems such as ineffective effects, achieve improved viscous properties and mechanical properties, low energy consumption, and good The effect of compatibility and dispersibility

Pending Publication Date: 2018-11-27
广西贺州市科隆粉体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current method of modifying calcium carbonate, the main surface treatment agent is usually fatty acid or its salt. Although the dispersion and processing fluidity of the system have been improved, the effect is not obvious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of weather-resistant heavy calcium carbonate, comprising the following steps:

[0027] S1: add limestone to pulverizer, pulverize to particle diameter≤0.25mm, get calcium carbonate coarse powder;

[0028] S2: Calcium carbonate coarse powder, water, PMA are added to the grinder according to the ratio of 100:400:6 in weight ratio, and polyethylene glycol distearate and polyoxypropylene polyoxyethylene polystyrene in a weight ratio of 3:1 are added. The first surface modifier composed of oxyethylene glyceryl ether, the addition of the first surface treatment agent is 2% of the weight of calcium carbonate coarse powder, and the grinding speed is 1.5h under the speed of 1000r / min, and the particle size is 700 mesh calcium carbonate slurry;

[0029] S3: Transport the calcium carbonate slurry to a high-speed mixer, and then add N-phenylmaleimide, rosin acid diethanolamide ether sodium carboxylate and octaaminophenyl clathrate with a weight ratio of 1:2:1 ...

Embodiment 2

[0031] A preparation method of weather-resistant heavy calcium carbonate, comprising the following steps:

[0032] S1: add limestone to pulverizer, pulverize to particle diameter≤0.25mm, get calcium carbonate coarse powder;

[0033] S2: Calcium carbonate coarse powder, water, PMA are added to the grinder according to the ratio of 100:350:7 by weight, and polyethylene glycol distearate and polyoxypropylene polyoxyethylene polystyrene are added in a weight ratio of 2:1. The first surface modifier composed of oxyethylene glyceryl ether, the addition of the first surface treatment agent is 2.4% of the weight of calcium carbonate coarse powder, and the grinding speed is 1200r / min for 2h, and the particle size is 1000 mesh calcium carbonate slurry material;

[0034] S3: Transport the calcium carbonate slurry to a high-speed mixer, and then add N-phenylmaleimide, rosin acid diethanolamide ether sodium carboxylate and octaaminophenyl clathrate with a weight ratio of 1:2.5:1.5 The se...

Embodiment 3

[0036] A preparation method of weather-resistant heavy calcium carbonate, comprising the following steps:

[0037] S1: add limestone to pulverizer, pulverize to particle diameter≤0.25mm, get calcium carbonate coarse powder;

[0038] S2: Calcium carbonate coarse powder, water, PMA are added to the grinder according to the ratio of 100:500:8 in weight ratio, and polyethylene glycol distearate and polyoxypropylene polyoxypropylene polystyrene in a weight ratio of 4:1 are added. The first surface modifying agent that oxyethylene glyceryl ether is formed, the add-on of the first surface treating agent is 3% of the weight of calcium carbonate coarse powder, grinds 1.5h under rotating speed for 1500r / min, obtains particle diameter and is 830 mesh calcium carbonate slurry;

[0039] S3: Transport the calcium carbonate slurry to a high-speed mixer, and then add N-phenylmaleimide, rosin acid diethanolamide ether sodium carboxylate and octaaminophenyl clathrate with a weight ratio of 1:2...

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PUM

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Abstract

The invention discloses a method for preparing weather-resistant type heavy calcium carbonate. The method includes adding limestone into smashing machines and smashing the limestone until the particlesizes of the limestone are smaller than or equal to 0.25 mm so as to obtain calcium carbonate coarse powder; adding the calcium carbonate coarse powder, water, PMA (polymethyl acrylate) and first surface modifiers into grinders and carrying out wet grinding to obtain calcium carbonate slurry; delivering the calcium carbonate slurry to high-speed stirring machines, adding second surface modifiersinto the high-speed stirring machines, uniformly stirring and mixing the calcium carbonate slurry and the second surface modifiers with one another at the high speeds to obtain mixtures and dehydrating and drying the mixtures to obtain the weather-resistant type heavy calcium carbonate. The first surface modifiers comprise polyethylene glycol di-stearate and polypropylene oxide polyoxyethylene glycerin ether. The second surface modifiers comprise N-phenylmaleimide, abietic acid diethanol amide ether sodium carboxylate and octa-aminophenyl polyhedral oligomeric silsesquioxane. The method has the advantage that the weather-resistant type heavy calcium carbonate obtained by means of surface modification is excellent in dispersibility, hydrophilic and lipophilic performance, thixotropy, processing flowability, chemical stability, weather resistance and heat resistance and can be widely applied to the industries of building materials, coating, rubber, sealants, printing ink and the like.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate modification, in particular to a preparation method of weather-resistant heavy calcium carbonate. Background technique [0002] Calcium carbonate is an important inorganic chemical product, which is widely used in rubber, plastic, paper, paint, ink, medicine, cosmetics, food and other industries. However, due to the smaller the particle size of calcium carbonate particles and the more atoms on the surface, the higher the surface energy, the stronger the adsorption, and the mutual agglomeration between the particles; followed by calcium carbonate as an inorganic filler, the surface of the particles is hydrophilic and hydrophobic. Oil has poor affinity with organic polymers and is easy to form aggregates, resulting in internal defects of polymers and poor mechanical properties. In order to improve the filling performance of calcium carbonate, effective technology and surface modification ...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/10C09C3/12C09C3/08C09J183/06C09J11/04C09J11/06
CPCC09C1/021C01P2006/22C08K2003/265C08K2201/003C08L2201/08C08L2205/025C08L2205/03C09C3/006C09C3/08C09C3/10C09C3/12C09J11/04C09J11/06C09J183/06C08L83/04C08K13/06C08K9/04C08K9/08C08K3/26C08K3/36C08K5/54
Inventor 李奇洪黄华彬唐洋喜郑焱天张晋国叶有蒙福华胡声琴
Owner 广西贺州市科隆粉体有限公司
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