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Calcium stearate aqueous dispersion solution and preparation method thereof

A water-based dispersion liquid, calcium stearate technology, applied in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve the problems of many types of emulsifying dispersants, high relative cost, coarse particle size, etc., and achieve ideal lubricating effect, Excellent resistance to yellowing, good mechanical effect

Active Publication Date: 2013-03-06
DONGGUAN CHNV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is easier to disperse in water, but its particle size is coarser than that of the one-step method
[0003] There are many kinds of emulsifying and dispersing agents used in the formulas of the above two methods, the disadvantages of large dosage and relatively high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 11g of stearic acid and 240g of water into the pre-dispersion pot and heat to 75°C, then add 1.6g of alkalizing agent LiOHH2O to react for 25 minutes while stirring, add 16g of APG12 and 0.8g of water-based silane defoamer 602 after complete reaction and stir to disperse , use ammonia water and acetic acid solution to adjust the pH value to between 9 and 10 (PHS-25 acidity meter, the same below), then add 150g of calcium stearate under stirring, stir and disperse for 50 minutes to make it completely dispersed in the system , then add 0.8g hydroxypropyl methylcellulose, 0.8g water-based silane defoamer 602, 1.0g benzyl bromoacetate and carry out ultrafine grinding, so that the particle size of calcium stearate particles<10 microns (grinding 2 hours), then stop grinding and discharge. The resulting product has a viscosity of 50mPa.S (measured by NDJ-1 rotational viscometer, the same below), an average particle size of 9 microns (measured by the European and American l...

Embodiment 2

[0055] Add 14g of stearic acid and 300g of water into the pre-dispersion pot and heat to 80°C, then add alkalizing agent 7g of ammonia water (12.5%) to react for 40 minutes while stirring, add 24g of APG12, 0.5g of modified organic fluorine Wet dispersant 1010 and 1.5g VG-508 were stirred and dispersed, and the pH value was adjusted to between 9 and 10 with ammonia water and acetic acid solution, and 225g of calcium stearate was added under stirring, and stirred and dispersed for 75 minutes to make it completely dispersed in the system. Then add 1.3g of carboxymethylcellulose, 1.5g of VG-508, and 2g of tributyltin for ultrafine grinding, so that the particle size of calcium stearate particles is less than 10 microns (grinding for 3 hours), then stop grinding and discharge. The resulting product has a viscosity of 80mPa.S, an average particle size of 6 microns, and a solid content of 47%.

Embodiment 3

[0057] Add 22g of stearic acid and 390g of water into the pre-dispersion pot and heat to 70°C, then add 3g of NaOH under stirring to react for 20 minutes, after complete reaction, add 0.8g of modified organic fluorine wetting and dispersing agent 1010, 15g of sodium polyacrylate 1.8 Stir and disperse gVG-108, adjust the pH value to between 9 and 10 with ammonia water and acetic acid solution, then add 300g calcium stearate under stirring, stir and disperse for 40 minutes to make it completely dispersed in the system, then add 2.0g hydroxy Propyl methyl cellulose, 2.0g VG-108, and 1.2g tetrafluoroisophthalonitrile are subjected to ultrafine grinding to make the particle size of calcium stearate particles <10 microns (grinding for 2 hours), then stop grinding and discharge. The resulting product has a viscosity of 150 mPa.S, an average particle diameter of 7 microns, and a solid content of 47%.

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Abstract

The invention provides a calcium stearate aqueous dispersion solution and a preparation method thereof, wherein the method comprises the following steps: heating a mixture of stearic acid and water until the temperature is more than 65 DEG C which is above the melting point of the stearic acid; then adding a dispersing agent, partial defoamer and a basifier for reaction, then adding a calcium stearate aqueous dispersion solution; and finally adding an anti-settling agent and a bactericide, carrying out ultramicro-grinding, and adding the residual defoamer to obtain the target product. The prepared calcium stearate aqueous dispersion solution has a particle size less than 10 microns; the viscosity is in the range of 50-280 mPa.S, and the solid content is 43-50%. The calcium stearate aqueous dispersion solution provided by the invention is exposed to air without generating a film, is low in viscosity, good in mechanical property, stable in chemical performance and excellent in xanthosis resistance. Besides, the product is nontoxic, free of peculiar smell, environment-friendly, and ideal in sensitizing and lubricating effects.

Description

technical field [0001] The invention mainly relates to functional additives in the papermaking industry, belongs to the technical field of sensitizers and lubricants, and specifically refers to a method for manufacturing an aqueous calcium stearate dispersion. Background technique [0002] Calcium stearate is a typical water-insoluble metal soap fatty acid salt, which is widely used as a lubricant in papermaking, plastics and other fields. In the paper industry, calcium stearate is generally made into an aqueous dispersion, and then added to the system at 0.5 to 5% of the absolute dry weight of the pigment to make the coating system have good fluidity and make the coating plastic, reducing The paper is powdered and fluffed. The preparation of calcium stearate aqueous dispersion can be divided into one-step method and two-step method in principle. The one-step method is to synthesize calcium hydroxide or calcium salt, stearic acid, dispersant, emulsifier and other raw mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/14C08K5/098
Inventor 胡丹荀育军
Owner DONGGUAN CHNV TECH CO LTD
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