Calcium stearate dispersing liquid for papermaking and preparation method thereof

A technology of dispersion liquid and stearic acid, which is applied in the direction of papermaking, textile and papermaking, fiber dispersant addition, etc. It can solve the problems of unsuitable long-distance transportation and long-term storage, poor freeze-thaw stability, easy precipitation and stratification, etc., and achieve good Storage stability, good freeze-thaw stability, and simple operation

Inactive Publication Date: 2012-12-19
ZHEJIANG HEXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the production of water-based calcium stearate dispersions has spread all over the country, but water-based calcium stearate dispersions generally have the problem of high viscosity and poor stability, especially poor freeze-thaw stability. The dispersion liquid is easy to precipitate and stratify, so it is not suitable for long-distance transportation and long-term storage
In order to solve the shortcoming of the poor freeze-thaw stability of the calcium stearate dispersion, the common method at present is to add antifreeze agents such as ethylene glycol, propylene glycol, ethanol, diethylene glycol, glycerin, etc. to the dispersion, but the effect is not obvious if the amount added is small. Adding too much will increase the cost

Method used

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  • Calcium stearate dispersing liquid for papermaking and preparation method thereof
  • Calcium stearate dispersing liquid for papermaking and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 340g of water and 60g of calcium hydroxide to a 1000ml four-neck flask equipped with a stirrer, heat up to 90°C, add 16g of fatty alcohol polyoxyethylene ether, 8g of sodium dodecylbenzenesulfonate, 4g of sodium hydroxide under stirring Sorbitan monooleate, 16g polyoxyethylene sorbitan monooleate, 5g polyethylene glycol 400, 2g polyvinyl alcohol, after stirring evenly, slowly add 340g stearic acid, 10g mass percentage concentration is 30% hydrogen peroxide, stirred at constant temperature for 10 minutes, added 3g of water-soluble silicone oil and 10g of modified polyvinyl alcohol aqueous solution, stirred and mixed at 85-95°C for 1 hour, then stopped heating, and cooled rapidly at a rate of 6°C / min to At room temperature, shear and disperse at a speed of 3000r / min for 15 minutes to prepare a calcium stearate dispersion for papermaking.

[0042] The resulting calcium stearate dispersion for papermaking had a viscosity of 72 mpa·s at 25° C., an average particle diamet...

Embodiment 2

[0044] Add 450g of water and 40g of calcium hydroxide to a 1000ml four-neck flask equipped with a stirrer, heat up to 85°C, add 10g of sodium polyacrylate, 6g of sodium dodecyl diphenyl ether sulfonate, 14g of polyoxygen Ethylene sorbitan monostearate, 4g urea, 2g hydroxyethyl cellulose, after stirring evenly, slowly add 270g stearic acid, 6g mass percentage concentration of 30% hydrogen peroxide, stir at constant temperature for 10min, add 2g polydimethylformaldehyde base siloxane, 10g modified polyvinyl alcohol aqueous solution, stirred and mixed reaction at 85-95°C for 1 hour, then stopped heating, cooled rapidly to room temperature at a speed of 6°C / min, and then sheared at a speed of 3000r / min After cutting and dispersing for 15 minutes, a calcium hardate dispersion for papermaking can be prepared.

[0045] The resulting calcium stearate dispersion for papermaking had a viscosity of 53 mPa·s at 25° C., an average particle size of 0.28 μm, and a solid content of 41.3%.

Embodiment 3

[0047] Add 320g of water and 80g of calcium hydroxide to a 1000ml four-neck flask equipped with a stirrer, heat up to 90°C, add 15g of sodium hexametaphosphate, 10g of sodium alkylarylsulfonate, and 5g of sorbitan under stirring Monostearate, 20g polyoxyethylene sorbitan monostearate, 6g polyethylene glycol 400, 3g hydroxymethyl cellulose, after stirring evenly, slowly add 470g stearic acid, 12g mass percentage concentration is 30 % ammonia water, stirred at constant temperature for 10 minutes, added 4g of water-soluble silicone oil and 12g of modified polyvinyl alcohol aqueous solution at the same time, stirred and mixed at 85-95°C for 1 hour, then stopped heating, and cooled rapidly to 6°C / min. At room temperature, shear and disperse at a speed of 3000r / min for 20 minutes to prepare a calcium stearate dispersion for papermaking.

[0048] The resulting calcium stearate dispersion for papermaking had a viscosity of 114 mPa·s at 25° C., an average particle diameter of 0.62 μm, an...

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Abstract

The invention discloses a calcium stearate dispersing liquid for papermaking and a preparation method thereof. The liquid comprises, by weight percent, 30 to 60 % of water, 30 to 60 % of stearic acid, 5 to 15 % of calcium hydrate, 0.8 to 3.2 % of a dispersant, 1 to 2.5 % of an emulsifier A, 1 to 4 % of an emulsifier B, 0.3 to 0.6 % of an emulsification auxiliary agent, 0.1 to 0.8 % of an stabilizing agent, 0.4 to 3 % of a catalyst, 0.3 to 0.5 % of an antifoaming agent, and 1 to 2.8 % of a modified polyvinyl alcohol aqueous solution. The invention further discloses a preparation method of the calcium stearate dispersing liquid for papermaking. The calcium stearate dispersing liquid for papermaking and the preparation method thereof are simple to operate and suitable for industrial production, and the prepared calcium stearate dispersing liquid for papermaking is good in stability, and has greatly improved freeze-thaw stability especially.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a calcium stearate dispersion for papermaking and a preparation method thereof. Background technique [0002] Coated paper is coated with a layer of paint on the base paper, so that the paper has good optical properties and printing performance. Coated paper is mainly used as publishing paper for printing magazines, books, etc., as well as printing paper for trademark packaging, catalogs, etc. [0003] Coated paper can be divided into: coated paper, coated paper, lightweight coated paper, in addition to special coated paper such as burnished coated paper. [0004] In recent years, the demand for coated paper has been increasing. In the coating process, in order to promote the flow and leveling of the coating, and improve the smoothness and gloss of the coating, it is necessary to use a lubricant in the coating. The use of lubricants can improve the printing adaptability of coated pap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/06D21H21/12D21H21/08D21H19/14D21H19/20
Inventor 孙大伟陈冬平
Owner ZHEJIANG HEXIN TECH
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