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Zinc stearate dispersion liquid and preparation method thereof

A technology of zinc stearate and dispersion liquid, used in papermaking, coating, pigment-containing coating and other directions, can solve the problems of incomplete reaction, easy precipitation, and difficult dispersion of products, and achieves low energy consumption and raw material cost, and reduced cost. Small coefficient of kinetic friction, the effect of improving coating gloss

Pending Publication Date: 2021-04-16
JINING MING SHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, water-based zinc stearate is mainly used as a lubricant for special coated paper, super-coating for sandpaper, sensitizer for thermal paper, release agent for rubber, and functional additive for water-based coatings. Zinc is insoluble in water, and works by dispersing particles in the application system, so the size of the particle size will directly affect the dispersion effect of the active ingredients. The usual water-based zinc stearate has a large particle size, is not easy to disperse, and is easy to precipitate. It is not ideal. It is difficult to make zinc stearate micronized by ordinary production processes. At the same time, zinc stearate is also a substance that is difficult to emulsify. Therefore, general zinc stearate is used as a lubricant in the paper industry. Its sensitization and lubrication The effect is not ideal and cannot meet the production requirements of high-grade paper and special paper
Patent CN103388284A discloses a water-based zinc stearate emulsion and its preparation method. The zinc stearate component prepared by this method has poor compatibility and poor emulsification effect, which requires high-intensity grinding to make the particles smaller and dispersed, especially in Generates a lot of foam at high solids
Patent CN103711034A discloses a superfine zinc stearate aqueous dispersion and its preparation method. In this method, stearic acid is prepared into a uniform dispersion and added to the zinc oxide dispersion, and reacted below the melting point of stearic acid to prepare stearin Zinc acid, the reaction of the obtained product is not complete, the solid content is low and a large amount of foam is generated when the solid content is high, and the product quality is not ideal

Method used

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  • Zinc stearate dispersion liquid and preparation method thereof
  • Zinc stearate dispersion liquid and preparation method thereof
  • Zinc stearate dispersion liquid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] According to the formula ratio of zinc stearate emulsion, take 50 parts of water, 140 parts of stearic acid, 30 parts of zinc oxide, 0.5 parts of acetic acid, 1 part of chlorinated paraffin-42, and 1 part of defoamer into the reaction kettle (1) , the temperature was raised to 80°C, and the reaction was carried out for 1h. Add 50 parts of water, sodium fatty acid methyl ester sulfonate, 2 parts of nonylphenol polyoxyethylene ether, 3 parts of sorbitan monostearate, and 2 parts of sodium polyacrylate into the reaction kettle (2) , stir evenly and heat up to 80°C, add 0.5 parts of modified polysiloxane to defoam, add the emulsified dispersion obtained in the reactor (2) to the reactor (1) at one time, and shear at high speed for 1 hour (shear rate 2000r / min) through a homogenizer to quickly cool to below 30 degrees, discharge, add 15 parts of polyvinyl alcohol 400, adjust the solid content to 60%, and stir evenly to obtain the target product.

Embodiment 2

[0025] According to the formula ratio of zinc stearate emulsion, take 80 parts of water, 150 parts of stearic acid, 30 parts of zinc oxide, 0.5 part of oxalic acid, 0.1 part of chlorinated paraffin-70, and 1 part of defoamer into the reaction kettle (1) , the temperature was raised to 80°C, and the reaction was carried out for 1h. Add 50 parts of water, sodium fatty acid methyl ester sulfonate, 4 parts of nonylphenol polyoxyethylene ether equal proportion mixture, 5 parts of polyoxyethylene sorbitan monostearate, and 2 parts of sodium polyacrylate into the reaction kettle ( 2), stir evenly and heat up to 80°C, add 0.5 parts of modified polysiloxane to defoam, add the emulsified dispersion obtained in the reaction kettle (2) to the reaction kettle (1) at one time, and shear at high speed for 1 hour ( Shear rate 3000r / min), through a homogenizer (25MPa) to quickly cool to below 30 degrees, discharge, add 20 parts of polyacrylamide (molecular weight 2 million), adjust the solid c...

Embodiment 3

[0027] According to the formula ratio of zinc stearate emulsion, get 60 parts of water, 140 parts of stearic acid, 30 parts of zinc oxide, 0.5 part of citric acid, 0.5 part of chlorinated paraffin-52, and 1 part of defoamer to join in the reactor (1 ), heat up to 80°C, and react for 1h. Add 50 parts of water, sodium fatty acid methyl ester sulfonate, 3 parts of nonylphenol polyoxyethylene ether, 5 parts of polyoxyethylene sorbitan monostearate, and 2 parts of sodium tripolyphosphate into the reactor In (2), the emulsified dispersion obtained in the reaction kettle (2) is added to the reaction kettle (1) at one time, sheared at high speed for 1 hour (shear rate 3000r / min), and quickly cooled to Below 30 degrees, discharge, add 20 parts of glycerin, adjust the solid content to 60%, stir evenly, and obtain the target product.

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Abstract

The invention discloses a zinc stearate dispersion liquid, which is composed of the following components in parts by weight: 140-200 parts of stearic acid, 20-60 parts of zinc oxide, 1-3 parts of a catalyst, 0.1-1 part of chlorinated paraffin, 1-3 parts of an emulsifier A, 3-8 parts of an emulsifier B, 2-5 parts of a dispersant, 0.5-1 part of a defoaming agent, 10-20 parts of a water-based lubricant and a proper amount of water. The preparation method comprises the following steps: mixing zinc oxide, a catalyst, chlorinated paraffin, stearic acid, part of a defoaming agent and water, and heating the components for a completed reaction to obtain a kettle material; dissolving the emulsifier A, the emulsifier B, the dispersing agent and the remaining defoaming agent in water to obtain emulsified dispersion liquid, adding the emulsified dispersion liquid into the kettle material at a time, shearing the mixture for 1 hour at a high speed, discharging the sheared mixture and treating the mixture through a homogenizer, quickly cooling the mixture, adding the water-based lubricating agent, and adjusting the solid content to obtain the zinc stearate dispersion liquid. The zinc stearate dispersion liquid disclosed by the invention is high in solid content, low in viscosity, uniform in emulsion, ideal in sensitizing and lubricating effects, free of deterioration and flocculation layering phenomena during long-time storage, in a bubble-free state during production, and great in product quality.

Description

technical field [0001] The invention relates to the technical field of zinc stearate dispersion liquid, in particular to a zinc stearate dispersion liquid of a sensitizer for papermaking, a lubricant, a release agent in the plastics industry, and a functional auxiliary agent for coatings, and a preparation method thereof. Background technique [0002] At present, water-based zinc stearate is mainly used as a lubricant for special coated paper, super-coating for sandpaper, sensitizer for thermal paper, release agent for rubber, and functional additive for water-based coatings. Zinc is insoluble in water, and works by dispersing particles in the application system, so the size of the particle size will directly affect the dispersion effect of the active ingredients. The usual water-based zinc stearate has a large particle size, is not easy to disperse, and is easy to precipitate. It is not ideal. It is difficult to make zinc stearate micronized by ordinary production processes...

Claims

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Application Information

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IPC IPC(8): D21H19/38D21H19/46D21H19/44D21H19/62D21H19/56D21H19/64D21H19/60
Inventor 施晓旦田建沈安成
Owner JINING MING SHENG NEW MATERIALS CO LTD
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