Preparation method of alkyl ketene dimer papermaking sizing agent and product

A technology of alkyl ketene dimer and sizing agent, which is applied in the field of papermaking, can solve the problems that the stability of emulsion droplet coalescence needs to be improved, and achieve the effects of low emulsification cost, improved hydrolysis resistance, and good sizing performance

Active Publication Date: 2021-06-01
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent 201010281410.X discloses a method of jointly emulsifying AKD with chitosan and nano-titanium dioxide. The emulsification process is simple, the AKD emulsion has high sizing efficiency and fast curing speed, but the coalescence stability of the emulsion droplets needs to be improved.

Method used

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  • Preparation method of alkyl ketene dimer papermaking sizing agent and product
  • Preparation method of alkyl ketene dimer papermaking sizing agent and product
  • Preparation method of alkyl ketene dimer papermaking sizing agent and product

Examples

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Effect test

Embodiment 1

[0030] The preparation of embodiment 1 AKD sizing agent

[0031] (1) 1 part by weight of hectorite (average width of a single particle is 25nm, thickness 2nm) is dispersed in water to form a dispersion with a mass fraction of 0.05%, and 2 parts by weight of acetone, 10 parts by weight of ammonia monohydrate, 0.02 parts by weight of ten Mix hexaalkyltrimethylsiloxane, 500W ultrasonic dispersion at 25°C for 1 hour to obtain mixed solution I; add 0.05 parts by weight of tridecafluorooctyltriethoxysilane to mixed solution I, and continue ultrasonic dispersion for 1 hour , to obtain mixed solution II; the mixed solution II was vacuum-dried at 65° C. to obtain modified hectorite powder;

[0032] (2) Mix 1 part by weight of modified laponite powder with 20 parts by weight of perfluorohexane, disperse ultrasonically at 500W at 25°C for 1 hour, add 200 parts by weight of molten AKD and mix, continue ultrasonic emulsification at 85°C for 15 minutes, and cool To room temperature to obta...

Embodiment 2

[0034] The preparation of embodiment 2 AKD sizing agent

[0035] (1) 1 part by weight of hectorite (average width of a single particle is 38nm, thickness 6nm) is dispersed in water to form a dispersion with a mass fraction of 1%, and 10 parts by weight of acetone, 20 parts by weight of ammonia monohydrate, 0.2 parts by weight of ten Mix hexaalkyltrimethylsiloxane and disperse with 1000W ultrasonic at 25°C for 1 hour to obtain mixed solution I; add 0.1 parts by weight of tridecafluorooctyltriethoxysilane to mixed solution I, and continue ultrasonically dispersing for 1 hour , to obtain mixed solution II; the mixed solution II was vacuum-dried at 65° C. to obtain modified hectorite powder;

[0036] (2) Mix 1 part by weight of modified laponite powder with 60 parts by weight of perfluorohexane, disperse ultrasonically at 1000W at 25°C for 1 hour, add 60 parts by weight of molten AKD and mix, and continue ultrasonic emulsification at 85°C for 15 minutes. Obtain AKD-A emulsion; It...

Embodiment 3

[0038] The preparation of embodiment 3 AKD sizing agent

[0039] (1) 2 parts by weight of hectorite (the average width of a single particle is 50nm, and the thickness is 10nm) is dispersed in water to form a dispersion with a mass fraction of 2%, and 1 part by weight of acetone, 2 parts by weight of ammonia monohydrate, 0.6 parts by weight of ten Mix hexaalkyltrimethylsiloxane and disperse it ultrasonically at 3000W for 1 hour at 25°C to obtain a mixed solution I; add 0.4 parts by weight of tridecafluorooctyltriethoxysilane to the mixed solution I, and continue ultrasonically dispersing for 1 hour , to obtain mixed solution II; the mixed solution II was vacuum-dried at 65° C. to obtain modified hectorite powder;

[0040] (2) Mix 1 part by weight of modified laponite powder with 100 parts by weight of perfluorohexane, ultrasonically disperse at 3000W for 1 hour at 25°C, add 10 parts by weight of molten AKD and mix, and continue ultrasonic emulsification for 15 minutes at 85°C. ...

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Abstract

The invention provides a preparation method of an alkyl ketene dimer papermaking sizing agent. The preparation method comprises the following steps: mixing a hectorite aqueous dispersion with acetone, ammonia monohydrate and hexadecyl trimethyl siloxane, and carrying out ultrasonic dispersion to obtain a mixed solution I; adding tridecafluorooctyltriethoxysilane into the mixed solution I, and carrying out ultrasonic dispersion to obtain a mixed solution II; drying the mixed solution II to obtain modified hectorite powder; mixing the modified hectorite powder with perfluorohexane, carrying out ultrasonic dispersion, adding molten AKD, conducting mixing and heating, and carrying out ultrasonic emulsification to obtain an AKD-A emulsion; and mixing the AKD-A emulsion with a sodium dodecyl sulfate aqueous solution, and carrying out ultrasonic emulsification to obtain the alkyl ketene dimer papermaking sizing agent. The sizing performance of the AKD emulsion prepared by the method disclosed by the invention is remarkably improved, and meanwhile, the hydrolysis resistance and emulsion stability of the AKD can be greatly improved; and the AKD sizing agent emulsion disclosed by the invention is simple in preparation process, low in emulsifying cost and good in sizing effect, and the dosage of an emulsifying agent is small.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a preparation method and product of an alkyl ketene dimer papermaking sizing agent emulsion. Background technique [0002] In the 20th century, the papermaking industry shifted from the acidic papermaking system to the medium-alkaline papermaking system, which was an innovative change in the papermaking process. It greatly improved the quality of paper and expanded the range of fillers, reduced pulp consumption and energy consumption, reduced environmental pollution, and extended the service life of equipment. service life. According to statistics, in the early 1980s in Europe, the cultural paper produced by medium and alkaline sizing accounted for 60%-65% of the total cultural paper, and it reached 95% in the 1990s. The proportion of alkaline sizing jumped from 15% to over 90%. Since 1989, China has started to use medium and alkaline sizing in production, and it has been g...

Claims

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Application Information

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IPC IPC(8): D21H17/17D21H21/16C01B33/20
CPCD21H17/17D21H21/16C01B33/20Y02W30/64
Inventor 于得海迟学祺赵锐甄文超胡飞鸿王哲李国栋王慧丽宋兆萍刘温霞
Owner 山东济清科技服务有限公司
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