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Preparation method of cationic suspension stabilizer of papermaking titanium dioxide

A suspension stabilizer, cationic technology, used in papermaking, textiles and papermaking, inorganic compound addition, etc., can solve problems such as reducing the dispersion effect, and achieve the effect of easy printing, good dispersion and obvious effect

Inactive Publication Date: 2016-08-17
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyacrylic acid suspension stabilizers are easy to desorb on the surface of titanium dioxide, reducing the dispersion effect

Method used

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  • Preparation method of cationic suspension stabilizer of papermaking titanium dioxide
  • Preparation method of cationic suspension stabilizer of papermaking titanium dioxide
  • Preparation method of cationic suspension stabilizer of papermaking titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: At a water bath temperature of 80°C, methacryloxyethyltrimethylammonium chloride DMC, hydroxypropyl acrylate HPA, styrene St (ratio 3:1:1), sodium hypophosphite, Cetyltrimethylammonium chloride, Tween-80, and Span-80 were added to the distilled water in the three-necked flask, and fully stirred evenly. The aqueous solution of ammonium persulfate with a solid content of 3% was added dropwise into the three-necked flask from the dropping funnel within about 1 hour. The initiator and the chain transfer agent accounted for about 1.5% and 3% of the total monomer mass respectively, and the emulsifier accounted for the total mass of the monomer. The mass of the monomer is 1.2%, and the temperature is kept for about 2.5 hours to obtain a white emulsion cationic terpolymer (DHS) suspension stabilizer with a solid content of about 20% and bluish light.

Embodiment 2

[0040] Example 2: At a water bath temperature of 75°C, methacryloxyethyltrimethylammonium chloride DMC, hydroxypropyl acrylate HPA, styrene St (ratio 3:1:1), sodium hypophosphite, Cetyltrimethylammonium chloride, Tween-80, and Span-80 were added to the distilled water in the three-necked flask, and fully stirred evenly. The aqueous solution of ammonium persulfate with a solid content of 2% was added dropwise into the three-necked flask from the dropping funnel within about 0.6h. The initiator and chain transfer agent accounted for about 1% and 2% of the total monomer mass respectively, and the emulsifier accounted for The total monomer mass is 1%, and it is kept for about 2 hours to obtain a white emulsion cationic terpolymer (DHS) suspension stabilizer with a solid content of about 15% and bluish light.

Embodiment 3

[0041] Example 3: At a water bath temperature of 85°C, methacryloxyethyltrimethylammonium chloride DMC, hydroxypropyl acrylate HPA, styrene St (ratio 3:1:1), sodium hypophosphite, Cetyltrimethylammonium chloride, Tween-80, and Span-80 were added to the distilled water in the three-necked flask, and fully stirred evenly. The aqueous solution of ammonium persulfate with a solid content of 4% was added dropwise into the three-necked flask from the dropping funnel within about 0.7h. The initiator and the chain transfer agent accounted for about 2% and 4% of the total monomer mass respectively, and the emulsifier accounted for The total monomer mass is 2%, and the heat preservation is about 3 hours to obtain a white emulsion cationic terpolymer (DHS) suspension stabilizer with a solid content of about 25% and bluish light.

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Abstract

The invention discloses a preparation method of a cationic suspension stabilizer of papermaking titanium dioxide, belonging to the technical field of a suspension stabilizer of papermaking titanium dioxide. The method comprises the following steps: (A) controlling the temperature of water bath to 75-85 DEG C, and fetching methacryloyloxyethyl trimethyl ammonium chloride, hydroxy-propyl acrylate and styrene in a mass ratio of 3:1:1 for later use; (B) fetching a chain transfer agent and an emulsifier and adding together with the standby materials fetched in the step (A) into a container with water, and stirring uniformly; and (C) preparing an aqueous solution of ammonium persulfate with solid content of 2-4%, dropwise adding the aqueous solution of ammonium persulfate into the container of the step (B), and preserving heat for 2-3h to obtain a cationic suspension stabilizer with solid content of 15-25%. By adopting the suspension stabilizer produced by the preparation method, titanium dioxide can be perfectly dispersed in a waterborne system, the non-transparency and whiteness of paper are improved, the printing is facilitated without penetration, and the retention rate of titanium dioxide in the paper sheets can be increased.

Description

technical field [0001] The invention belongs to the technical field of suspension stabilizers for titanium dioxide for papermaking, and relates to a preparation method for a cationic suspension stabilizer for titanium dioxide for papermaking, in particular to a method that not only enables titanium dioxide to be effectively dispersed in an aqueous system , improve the opacity and whiteness of paper, and can improve the retention rate of titanium dioxide in paper, the preparation method of cationic suspension stabilizer. Background technique [0002] At present, the titanium dioxide dispersants used by most domestic titanium dioxide manufacturers, that is, the suspension stabilizers are sodium hexametaphosphate-monoethanolamine mixture and sodium hexametaphosphate-triethanolamine mixture. These dispersants have good effects. However, its application in the field of papermaking still lags far behind the international level. In order to narrow this gap, we carried out research...

Claims

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Application Information

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IPC IPC(8): C08F220/34C08F220/28C08F212/08C08F2/30C08F2/28D21H17/67
CPCC08F2/28C08F2/30C08F220/34D21H17/675C08F220/281C08F212/08
Inventor 张川张千张建平
Owner HEBEI MILSON TITANIUM DIOXIDE
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