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Preparation method of ceramic white active calcium carbonate applied in aqueous coating

A technology of activated calcium carbonate and water-based coatings, which is applied in the direction of chemical instruments and methods, coatings, fibrous fillers, etc., can solve the problems that cannot meet the requirements of water-based coating fillers, poor compatibility of matrix resin, and affect the quality of coatings, etc., to achieve Good suspension, good compatibility, good hue effect

Inactive Publication Date: 2017-02-01
刘东进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used modifiers generally include titanate, aluminate, silane coupling agent, etc., but these modifiers either have a single function in water-based coatings, or have poor compatibility with the matrix resin, and even affect the quality of the coating. Therefore, they cannot meet the requirements of water-based coatings for fillers.

Method used

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  • Preparation method of ceramic white active calcium carbonate applied in aqueous coating
  • Preparation method of ceramic white active calcium carbonate applied in aqueous coating
  • Preparation method of ceramic white active calcium carbonate applied in aqueous coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the calcite is washed, air-dried and crushed, 100 kg of ore with a particle size below 25 mm is put into a grinder, and then 5040 type dispersant with a mass percentage of 0.4% and a weight of 0.4017 kg is added with a mass percentage of 0.03%, The KCB type fluorescent whitening agent with a weight of 0.0301kg is added to the quantitative metering device and mixed evenly, then evenly sprayed on the 100kg of ore, and the grinding starts. The machine collects products with a fineness of 800-3000 meshes; puts the collected products into a thermal insulation tank, heats them at 100°C for 2 hours, and cools to normal temperature to obtain modified heavy calcium carbonate.

Embodiment 2

[0027] After the calcite is washed, air-dried and crushed, 100 kg of ore with a particle size below 25 mm is put into a grinder, and then 5040 type dispersant with a mass percentage of 0.7% and a weight of 0.7056 kg is added, with a mass percentage of 0.09%, The KWN type fluorescent whitening agent with a weight of 0.0907kg is added to the quantitative metering device and mixed evenly, then evenly sprayed on the 100kg ore, and the grinding starts. The machine collects the products with a fineness of 800-3000 meshes; puts the collected products into an insulation tank, heats them at 110°C for 2 hours, and cools to normal temperature to obtain modified heavy calcium carbonate.

Embodiment 3

[0029] After the calcite is washed, air-dried and crushed, 100kg of ore with a particle size below 25mm is put into a grinder, and then the 5040 type dispersant with a mass percentage of 1.0% and a weight of 1.0110kg is added with a mass percentage of 0.09%, The KWN type fluorescent whitening agent with a weight of 0.0901kg is added to the quantitative metering device and mixed evenly, then evenly sprayed on the 100kg ore, and the grinding starts. The machine collects the products with a fineness of 800-3000 meshes; puts the collected products into an insulation tank, heats them at 110°C for 2 hours, and cools to normal temperature to obtain modified heavy calcium carbonate.

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Abstract

The invention discloses a preparation method of ceramic white active calcium carbonate applied in an aqueous coating and belongs to the field of mineral processing and non-metal mineral materials. The preparation method includes the steps of: washing, air-drying, crushing and grinding raw ore, and collecting and packaging a finish product, and uniformly mixing the ore that has been crushed to the granular size being less than 25 mm with a composite modifier, grinding the mixture in a grinder; during the grinding process, sorting the fine powder by means of a classifier, and collecting a product being 800-3000 meshes in fineness by a dust collector; and feeding coarse powder back to the grinder for continuously grinding the powder. The composite modifier includes, by mass, 0.4-2% of a 5040-type dispersant and 0.03-0.2% of a fluorescent whitening agent. Through the interaction of the 5040-type dispersant and the fluorescent whitening agent, the calcium carbonate has excellent suspension property, dispersibility and flowability. The method reduces stirring time and usage amount of kaolin and talcum during the production of the coating, thereby saving cost. The calcium carbonate has good compatibility in resin and can reduce usage amount of resin, has high whiteness and is good in color.

Description

technical field [0001] The invention belongs to the field of mineral processing and non-metallic mineral materials, and specifically relates to a preparation method of functional heavy calcium carbonate filler. Background technique [0002] Ground calcium carbonate is an inorganic compound with the chemical formula CaCO 3 , It is weakly alkaline and hardly soluble in water. The powder produced by grinding natural marble, calcite and other ores is called heavy calcium carbonate. Because ground calcium carbonate is white, hydrophilic, and cheap, it is widely used in latex paint and other water-based paints to fill the skeleton, and it accounts for the largest proportion of all fillers. There are many varieties and specifications of heavy calcium carbonate, which are confusing. Only by choosing high-quality and stable products can the quality of coatings be guaranteed. The indicators of calcium carbonate used in water-based paints are: whiteness, fineness, dispersibility, oi...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C09C3/10C09D7/12
CPCC09C1/021C09C3/006C09C3/08C09C3/10
Inventor 刘东进
Owner 刘东进