A kind of highly water-resistant AKD emulsion and preparation method thereof

An emulsion and high-resistance technology, applied in the direction of water-repellent addition, papermaking, coating, etc., can solve the problems of waste of water resources and energy, low solid content of emulsion, low sizing efficiency, etc., and achieve simplified process and water resistance Excellent effect and high sizing efficiency

Active Publication Date: 2021-09-24
山东同创精细化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main problems in the preparation of AKD emulsion are that the solid content of the emulsion is not high, waste of water resources and energy, low sizing efficiency, and serious pollution

Method used

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  • A kind of highly water-resistant AKD emulsion and preparation method thereof
  • A kind of highly water-resistant AKD emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add 20 parts of palm wax into the reaction kettle, heat up to 60°C, after the palm wax melts, add 80 parts of boiling water, 1 part of corn starch, and 3 parts of compound emulsifier in a nitrogen protective atmosphere, 500rpm, Stir for 20 minutes;

[0036] (2) After the solution is completely mixed evenly, raise the temperature to 90°C, add 40 parts of AKD flakes, 5 parts of acrylic acid, 7 parts of sodium hydroxide, slowly add 3 parts of ammonium persulfate dropwise, 1000rpm, and stir for 5 hours;

[0037] (3) After the reaction is finished, the temperature is lowered to normal temperature, and the pH of the solution is adjusted with dilute hydrochloric acid, so that the emulsion is neutral, that is, the highly water-resistant AKD emulsion can be obtained.

[0038] The preparation method of the compound emulsifier is as follows: add 1 part of soybean lecithin and 2 parts of sucrose ester to 5 parts of water, add 0.1 part of guar gum and 0.2 part of water-soluble a...

Embodiment 2

[0040] (1) Add 30 parts of peak wax into the reaction kettle, heat up to 90°C, after the beeswax melts, add 100 parts of boiling water, 3 parts of potato starch, 5 parts of compound emulsifier, 1000rpm, stir 30 minutes;

[0041] (2) After the solution is completely mixed evenly, raise the temperature to 100°C, add 50 parts of AKD flakes, 10 parts of acrylic acid, 9 parts of sodium hydroxide, slowly add 5 parts of potassium persulfate dropwise, 1500rpm, and stir for 10 hours;

[0042] (3) After the reaction is finished, the temperature is lowered to normal temperature, and the pH of the solution is adjusted with acetic acid to make the emulsion neutral, and the high water-resistant AKD emulsion can be obtained.

[0043] The preparation method of the described compound emulsifier is: add 3 parts of soybean lecithin, 4 parts of sucrose ester to 10 parts of water, add 0.3 part of guar gum, 0.5 part of water-soluble amino acid, stir with a homogenizer, 5000 rpm, 8 minutes, A mixed...

Embodiment 3

[0045] (1) Add 25 parts of palm wax to the reaction kettle, heat up to 80°C, after the palm wax melts, add 90 parts of boiling water, 2 parts of sodium lignosulfonate, and 4 parts of compound emulsifier in a nitrogen protective atmosphere , 800rpm, stirring for 25 minutes;

[0046] (2) After the solution is completely mixed evenly, raise the temperature to 100°C, add 45 parts of AKD flakes, 7 parts of acrylic acid, and 8 parts of sodium hydroxide, slowly add 4 parts of tert-butyl peroxide dropwise, 1500 rpm, and stir for 7 hours;

[0047] (3) After the reaction is finished, the temperature is lowered to normal temperature, and the pH of the solution is adjusted with citric acid to make the emulsion neutral, and the high water-resistant AKD emulsion can be obtained.

[0048] The preparation method of the described compound emulsifier is: add 2 parts of soybean lecithin, 3 parts of sucrose ester to 8 parts of water, add 0.2 part of guar gum, 0.4 part of water-soluble amino acid,...

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Abstract

The invention discloses a highly water-resistant AKD emulsion and a preparation method thereof. The preparation method comprises: (1) adding 20-30 parts of biological wax into the reactor, heating up to 60-90° C., after the biological wax is melted, adding 80-100 parts of boiling water, 1-3 3-5 parts of stabilizer, 3-5 parts of compound emulsifier, 500-1000rpm, stirring for 20-30 minutes; (2) until the solution is completely mixed, raise the temperature to 90-100°C, add 40-50 parts of AKD flakes, 5-10 parts of acrylic acid, 7-9 parts of sodium hydroxide, slowly drop 3-5 parts of initiator, 1000-1500rpm, stir for 5-10 hours; The acid adjusts the pH of the solution so that the emulsion is neutral, that is, the highly water-resistant AKD emulsion can be obtained. The preparation process of the high water-resistant AKD emulsion of the present invention is simple and mature, the production cost is low and environmentally friendly, and the operation is easy to control, while the obtained high water-resistant AKD emulsion has high sizing efficiency, fast curing speed, and small slip coefficient, which can reduce energy consumption and environmental protection. Pollution, excellent water resistance.

Description

technical field [0001] The invention relates to an auxiliary agent for papermaking, in particular to the preparation of a highly water-resistant AKD emulsion, and belongs to the technical field of papermaking. Background technique [0002] In recent years, my country's paper industry has overcome many unfavorable factors brought about by the global economic crisis, and has achieved both output and consumption increases. Rapid development puts forward higher requirements for sizing agents, and the development and utilization of new surface sizing agents is imminent, which is a hot spot in current research. [0003] AKD is an unsaturated lactone. The product is a waxy solid insoluble in water, with a melting point of about 51-52°C. AKD used in papermaking sizing agent must be made into emulsion. The particle size of the product is about 0.5-2μm. The emulsion is white and easily hydrolyzed, so the general storage period is short, only 3-6 months. [0004] At present, the main ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/06C08F2/44D21H19/14D21H19/44D21H19/58D21H19/46D21H21/16
CPCC08F2/44C08F289/00D21H19/14D21H19/44D21H19/46D21H19/58D21H21/16C08F220/06
Inventor 丁来民崔孝君
Owner 山东同创精细化工有限公司
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