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 si

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

Experimental program
Comparison scheme
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Example Embodiment

[0030]Example 1 Preparation of AKD Schubic

[0031](1) 1 parts by weight of lithium soap (average particle average width 25 nm, thickness 2 nm) Dispersed in water into a dispersion of a mass fraction of 0.05%, adding 2 parts by weight of acetone, 10 parts by weight of one hydrated ammonia, 0.02 parts by weight The hexadalkyl trimethylsiloxane is mixed, and the ultrasonic dispersion is 1 hour at 25 ° C, and 0.05 parts by weight of thirtex-octyl triethoxysilane is added to the mixed liquid 1, and the ultrasonic dispersion is 1 hour. To give a mixed liquid II; dried the mixture II at 65 ° C to give a modified lithium soap powder;

[0032](2) 1 part by weight of the modified lithium soap powder is mixed with 20 parts by weight of all-fluorohexane, and 500 W at 25 ° C for 1 hour, 200 parts by weight of the melt state AKD mix, 85 ° C continued to emulsify for 15 minutes, cooling The AKD-A emulsion was obtained at room temperature;

[0033](3) 2 parts by weight of the AKD-A emulsion with a 1 parts ...

Example Embodiment

[0034]Example 2 Preparation of AKD Schubic

[0035](1) 1 parts by weight of lithium soapstone (average particle average width of 38 nm, thickness 6 nm) Dispersed in water, a dispersion of mass fraction of 1%, adding 10 parts by weight of acetone, 20 parts by weight of a hydrated ammonia, 0.2 parts by weight The hexadalkyl trimethylsiloxane is mixed, and the ultrasonic dispersion is 1 hour at 25 ° C, and the mixed liquid 1 is obtained; 0.1 parts by weight of thirtexyl triboxysilane is added to the mixed liquid 1, continue to ultrasonically dispersed for 1 hour. To give a mixed liquid II; dried the mixture II at 65 ° C to give a modified lithium soap powder;

[0036](2) 1 parts by weight of the modified lithium soap powder is mixed with 60 parts by weight of all-fluorohexane, and the ultrasonic dispersion at 25 ° C is 1 hour, and 60 parts by weight of the melt state AKD is mixed, and the ultrasonic emulsion is continuously emulsified for 15 minutes at 85 ° C. Get akd-a lotion;figure 1 As sh...

Example Embodiment

[0038]Example 3 Preparation of AKD Schubic

[0039](1) 2 parts by weight of lithium soapstone (average particle average width 50 nm, thickness 10 nm) Dispersed in water to form a dispersion of a mass fraction of 2%, add 1 parts by weight of acetone, 2 parts by weight of one hydrated ammonia, 0.6 parts by weight Sixkyl trimethylsiloxane is mixed, 25 ° C 3000W ultrasonic dispersions for 1 hour, resulting in mixed liquid I; 0.4 parts by weight of thioplanethoxysilane is added to the mixed liquid 1, continue to ultrasonically dispersing 1 hour To give a mixed liquid II; dried the mixture II at 65 ° C to give a modified lithium soap powder;

[0040](2) 1 parts by weight of the modified lithium soap powder is mixed with 100 parts by weight of all-fluorohexane, and 3000 W is dispersed at 25 ° C for 1 hour, and 10 parts by weight of the melt state AKD is mixed, and the ultrasonic emulsification is continued for 15 minutes at 85 ° C. Got AKD-A emulsion;

[0041](3) 1 parts by weight of the AKD-A emul...

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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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