Aqueous high-content nanometer calcium carbonate dispersoid and preparation method thereof

A nano-calcium carbonate, high-content technology, applied in biocide-containing paints, antifouling/underwater coatings, coatings, etc., can solve the problem of dispersion speed destroying emulsion stability, weakening surface polarity, large surface polarity, etc. to avoid dust pollution, improve wettability and dispersibility, and simplify the preparation process

Inactive Publication Date: 2012-07-04
SUZHOU SUNMUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the superfineness of nano-calcium carbonate particles, the surface polarity is large, the surface energy is high, and it is easy to adsorb and agglomerate to form secondary particles. The particle size becomes larger and eventually loses the special functions of nanoparticles. Therefore, It is often necessary to modify the surface of nanoparticles to reduce the surface energy of nanoparticles, improve the affinity between particles and emulsion, and

Method used

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  • Aqueous high-content nanometer calcium carbonate dispersoid and preparation method thereof
  • Aqueous high-content nanometer calcium carbonate dispersoid and preparation method thereof
  • Aqueous high-content nanometer calcium carbonate dispersoid and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0032] Example 1

[0033] Monomer A adopts Monomer B adopts Monomer C adopts In a four-necked flask equipped with a reflux condenser and two dropping funnels, add 2.2mol monomer A, 3.6mol monomer B, 3.2mol monomer C and 10mol deionized H 2 O, while stirring and heating in a constant temperature bath, when the high temperature rises to 70~90℃, start to add 0.6mol ammonium persulfate solution, and the dripping is completed in about 1 hour, keep the temperature for 2 hours, and then cool to 40~50℃. Then adjust the pH of the reaction solution to 8 with 40wt.% NaOH solution to obtain the dispersant.

Example Embodiment

[0034] Example 2

[0035] Monomer A adopts Monomer B adopts Monomer C adopts In a four-necked flask equipped with a reflux condenser and two dropping funnels, add 2.8mol monomer A, 4.0mol monomer B, 2.4mol monomer C and 10mol deionized H 2 O, while stirring and heating in a constant temperature bath, when the temperature is raised to 70~90℃, start to add 0.8mol ammonium persulfate solution, and the dripping is completed in about 1 hour, keep the temperature for 2 hours, and then cool to 40~50℃. Then adjust the pH of the reaction solution to 8 with 40wt.% NaOH solution to obtain a dispersant.

Example Embodiment

[0036] Example 3

[0037] Monomer A adopts Monomer B adopts Monomer C adopts In a four-necked flask equipped with a reflux condenser and two dropping funnels, add 3.4mol monomer A, 4.0mol monomer B, 3.2mol monomer C and 12mol deionized H 2 O, while stirring and heating in a constant temperature bath, when the temperature rises to 70~90℃, start to add 0.88mol ammonium persulfate solution dropwise, about 1 hour to complete the dripping, keep the temperature for 2 hours, then cool to 40~50℃, and then Adjust the pH of the reaction solution to 8 with 40wt.% NaOH solution to obtain the dispersant.

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Abstract

The invention discloses an aqueous high-content nanometer calcium carbonate dispersoid and a preparation method of the aqueous high-content nanometer calcium carbonate dispersoid. The aqueous high-content nanometer calcium carbonate dispersoid comprises the following ingredients through being metered by the total mass percentage: 40.0 to 60.0 weight percent of nanometer calcium carbonate, 5.0 to 10.0 weight percent of surface modifying agents, 2.0 to 6.0 weight percent of wetting agents, 6.0 to 15.0 weight percent of dispersing agents, 5.0 to 10.0 weight percent of functional additives, 0.2 to 0.5 weight percent of pH value conditioning agents and the balance de-ionized water, wherein the dispersing agents are formed by the self preparation of three polymerizable monomers through reaction. The aqueous high-content nanometer calcium carbonate dispersoid can replace nanometer calcium carbonate powder of the same quantity in the paint preparation process, in addition, the calcium carbonate dispersoid is easily dispersed, and the performance of the paint in multiple aspects of water resistance, washing resistance, stain resistance, construction performance and the like.

Description

technical field [0001] The invention relates to a nano-calcium carbonate dispersion and a preparation method thereof, in particular to a water-based high-content nano-calcium carbonate dispersion and a preparation method and application thereof in the field of slurrying of coatings, pigments and fillers and their applications. Background technique [0002] Compared with decorative materials such as facing bricks, granite, mosaics, and aluminum alloy glass curtain walls, architectural coatings have the advantages of low cost, high safety, good decoration, easy renewal, and little environmental pollution. In industrially developed countries, building exterior walls use 80-90% of high-grade coatings are decorated, and architectural coatings account for about 50% of the total output of coatings. In my country, as the country and government departments at all levels restrict the use of building materials such as glass curtain walls and floor tiles, architectural coatings occupy a...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D5/14
Inventor 陈敏王小莉周华梅成国吴鹏王燕平
Owner SUZHOU SUNMUN TECH CO LTD
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