Method for preparing calcium stearate water-based dispersion liquid

An aqueous dispersion, calcium stearate technology, applied in fiber dispersant addition, paper forming aid addition, defoamer and other directions, can solve the problems of high relative cost, large amount of emulsifying and dispersing agent, etc., and achieve ideal lubrication effect , short time-consuming, simple formula effect

Active Publication Date: 2013-09-04
肇庆市至立自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and easy, and is the method that calcium stearate synthesis adopts most in the market at present; But, because calcium stearate has stronger hydrophobicity, there is emulsifying dispersant consumption big when preparing, relatively high cost shortcoming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 33.63kg of water, 55g of sodium tripolyphosphate, 40g of urea, 750g of fatty alcohol polyoxyethylene ether, 370g of Tween-80 and 40g of polydimethylsiloxane defoamer were added to the reaction kettle, and a mechanical Stir at a stirring speed until the emulsifier is completely dispersed and stop stirring, add 15kg calcium stearate powder, and then rapidly stir at a stirring speed of 10000r / min until the calcium stearate powder is completely wetted, reduce the stirring speed to 5000r / min After stirring for 30min at the stirring speed, 50g of polydimethylsiloxane defoamer and 65g of isothiazolinone preservative were added, and after ultrafine grinding for 3min, it was screened by a 1000-mesh ultrasonic vibrating screen to obtain a viscosity of 120mPa· S, an aqueous dispersion of calcium stearate with an average particle size of 5 μm and a solid content of 30 wt %.

Embodiment 2

[0026] Add 28.458kg water, 82g styrene-maleic anhydride copolymer, 60g polyethylene glycol 400, 1000g fatty alcohol polyoxyethylene ether sodium sulfate, 200g polyethylene glycol laurate and 50g modified polyether to the reactor Antifoaming agent HT-610, stir at a mechanical stirring speed of 7000r / min until the emulsifier is completely dispersed and stop stirring, add 20kg calcium stearate powder, and then quickly stir to calcium stearate at a stirring speed of 10000r / min After the powder is completely wetted, reduce the stirring speed and continue stirring for 1 hour at a stirring speed of 5000r / min, then add 80g of polydimethylsiloxane defoamer and 70g of dichlorodimethylhydantoin preservative to carry out After ultra-fine grinding for 5 minutes, it was screened through a 1000-mesh ultrasonic vibrating screen to obtain an aqueous calcium stearate dispersion with a viscosity of 150 mPa·S, an average particle size of 8 μm and a solid content of 40 wt%.

Embodiment 3

[0028] Add 23.095kg water, 105g styrene-maleic anhydride copolymer, 20g sodium tripolyphosphate, 250g polyglycerol monolaurate, 550g polyoxyethylene-polyoxypropylene copolymer, 800g fatty alcohol polyoxyethylene to the reaction kettle Sodium ether sulfate and 50g of modified polyether antifoaming agent DMF-670 were stirred at a mechanical stirring speed of 7000r / min until the emulsifier was completely dispersed and then stopped stirring. Stir at a rapid stirring speed until the calcium stearate powder is completely wetted, reduce the stirring speed and continue stirring for 90 min at a stirring speed of 4000 r / min, then add 50 g of modified polyether defoamer DMF-670 and 80 g of p-hydroxybenzene. The methyl formate preservative was ultra-finely ground for 3 minutes, and then screened through a 1000-mesh ultrasonic vibrating sieve to obtain an aqueous calcium stearate dispersion with a viscosity of 200 mPa·S, an average particle size of 10 μm and a solid content of 50 wt%.

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Abstract

The invention discloses a method for preparing a calcium stearate water-based dispersion liquid. The method comprises the following steps: adding water and an emulsifier, a dispersant and 20-40% of the total content of a defoaming agent in a reaction kettle in a certain proportion, stirring until the emulsifier is dispersed uniformly, then stopping stirring, adding calcium stearate into the reaction kettle, then rapidly stirring until calcium stearate is completely wetted, then reducing the stirring speed and continuing to stir for 30-45 min, then adding a preservative and 60-80% of the total content of the defoaming agent into the reaction kettle, after carrying out superfine grinding for 3-8 min, screening through a 1000-1500 mesh supersonic wave vibrating screen, and obtaining the calcium stearate water-based dispersion liquid with the particle size of 5-10 microns. The method has the advantages of being simple in formula, easy to operate, and short in time consumption; and the product is non-crusting, is good in homogeneity and stabilization, is environmentally friendly, has adjustable solid content of calcium stearate and adjustable viscosity of the final system in a certain scope, and has an ideal lubrication effect.

Description

technical field [0001] The invention relates to a preparation method of an aqueous calcium stearate dispersion. The aqueous calcium stearate dispersion is mainly used as a papermaking coating process auxiliary, a plastic processing lubricant, a textile waterproofing agent and a paint flattening agent. Background technique [0002] Because of its good lubricity, calcium stearate is widely used in the fields of papermaking coating lubricants and PVC heat stabilizers, and can also be used as a flattening agent and waterproofing agent in the production of coatings. With the rapid development of the petrochemical industry of plastics, coatings and paper machines, the demand for calcium stearate is increasing year by year, and the market prospect is still optimistic. [0003] Calcium stearate has water-insoluble properties. When used as a lubricant, in order to increase its dispersion uniformity and good fluidity, it is generally used as an aqueous dispersion. At present, the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/06D21H21/08D21H21/12D21H21/36D21H19/14B29C33/60
Inventor 杜德光葛巧谊李明李晋张丽旭徐郑兵
Owner 肇庆市至立自动化科技有限公司
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