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Water-based calcium stearate dispersion for papermaking and preparation method thereof

A technology of water-based calcium stearate and calcium stearate, which is applied in papermaking, textiles and papermaking, fiber dispersant addition, etc., can solve problems such as low solid content, complicated process, and coarse particle size

Inactive Publication Date: 2011-06-15
DONGGUAN CHNV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of water-based calcium stearate dispersion has spread all over the country, but the solid content is generally below 50% and the viscosity is relatively high. A two-step method is adopted, that is, calcium stearate dry powder is first made, and then ground and dispersed to obtain , or it needs multiple feeds during the preparation process, the process is more complicated, the cost is high, the particle size is coarse and the solid content is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] Add 85 grams of calcium stearate at one time in the autoclave, 106 grams of water, 2 grams of emulsifier sorbitan monostearate, emulsifier polyoxyethylene (20) sorbitan monolaurate 3 gram, 0.7 grams of water-soluble silicone oil as an antifoaming agent, 1.0 grams of polyoxyethylene ether as a dispersant, 0.2 grams of tetrachloroisophthalonitrile as a fungicide, and 2.5 grams of urea as an auxiliary agent. Seal the autoclave and start heating. When heated to 160°C, start constant temperature stirring at a stirring speed of 600 rpm, stop stirring after 1 hour and rapidly cool to room temperature. The resulting product has a viscosity of 90mPa.S (measured by a DV-I Prime viscometer, the same below), an average particle size of 0.45 μm (measured by a BT-9300Z laser particle size distribution analyzer, the same below), and a solid content of 39wt%.

example 2

[0043] Add 94 grams of calcium stearate at one time in the autoclave, 96 grams of water, 2.5 grams of emulsifier fatty alcohol polyoxyethylene (9) ether, 3.5 grams of emulsifier polyoxyethylene monooleate, defoamer polyether - 0.5 grams of siloxane copolymer, 0.5 grams of glyceryl tristearate as a dispersant, 0.5 grams of bactericide tetradecyldimethylbenzyl ammonium chloride, 1.5 grams of polyethylene glycol 2000 as an auxiliary agent, and react with high pressure Seal the kettle and start heating. When heated to 170°C, start stirring at a constant temperature at a stirring speed of 700 rpm. After stirring for 1 hour, stop and quickly cool to room temperature. The resulting product has a viscosity of 135mPa.S and an average particle size of 0.88μm. The solid content was 53% by weight.

example 3

[0045] Add 105 grams of calcium stearate at one time in the autoclave, 84 grams of water, 5.0 grams of emulsifier polyoxyethylene (20) sorbitan monooleate, 4.0 grams of emulsifier sorbitan monolaurate , defoaming agent polyether-siloxane copolymer 0.3 grams, water-based dispersant methyl amyl alcohol 1.5 grams, fungicide sodium pentachlorophenate 0.7 grams, auxiliary agent liquid paraffin 1 gram, seal the autoclave and start heating , when heated to 180°C, start stirring at a constant temperature, the stirring speed is 800 rev / min, stop after stirring for 1 hour and cool to room temperature rapidly, the resulting product has a viscosity of 187mPa.S, an average particle size of 1.38μm, and a solid content of 59wt%.

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Abstract

The invention relates to a water-based dispersion and a preparation method thereof, wherein the water-based dispersion takes calcium stearate as the main component and is used for papermaking; and the dispersion is mainly used as an auxiliary, a functional auxiliary and a coating lubricant in the papermaking and coating processes. The dispersion is formed by processing the calcium stearate, an emulsifier A, an emulsifier B, an auxiliary, a dispersing agent, a defoamer, a fungicide and water; and the production comprising the steps of: adding the calcium stearate, the emulsifier A, the emulsifier B, the auxiliary, the dispersing agent, the defoamer, the fungicide and the water into a high-pressure reaction kettle according to a certain proportion; sealing the high-pressure reaction kettle and heating to 160-190DEG C; mixing the materials at a constant temperature for 1h; and then rapidly cooling to the room temperature so as to obtain the target product. According to the proportion and the method, the viscosity range of the prepared water-based calcium stearate dispersion is 90-680mPa.S, the particle size range is 0.45-5.0 microns and the solid content is 39-75wt%. The water-based calcium stearate dispersion has the advantages of simple process, high efficiency, no color reversion of the product, no odor, no pollution and the like; and the particle size, the solid content and the viscosity are adjustable.

Description

Technical field: [0001] The invention relates to a water-based dispersion liquid for papermaking mainly composed of calcium stearate and a preparation method thereof. The dispersion liquid is mainly used as a papermaking coating process auxiliary agent, a functional auxiliary agent and a coating lubricant. Background technique: [0002] In recent years, the demand for coated paper, high-gloss cast-coated paper, and coated white board paper is increasing. Lubricants must be used to ensure uniform dispersion and good fluidity and leveling during the high-speed coating process. Lubricants can improve the leveling and lubricity of paper coatings, enhance adhesives, impart smoothness and gloss to paper coatings, increase plasticity, prevent cracking, and improve the printing adaptability of coated paper. In addition, it can prevent roll sticking during super calendering and prevent powder falling during paper cutting and printing. Starch-based coated paper is most sensitive to ...

Claims

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Application Information

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IPC IPC(8): D21H19/24D21H19/62D21H21/08D21H21/12D21H21/36
Inventor 荀育军刘清泉
Owner DONGGUAN CHNV TECH CO LTD
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