Crosslinked material capable of promoting curing of alkyl ketene dimer and preparation method thereof

A technology of alkyl ketene dimer and cross-linked body, applied in the field of cross-linked body, can solve the problems of insufficient sizing effect, lack of curing speed, limited sources, etc., to shorten the curing time, improve the utilization rate, The effect of reducing the dosage

Inactive Publication Date: 2011-06-22
NANTONG TONGDI BIOTECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the above technology is that the main raw materials used are synthetic polymers, which are expensive and difficult to degrade, and the sources are limited, and the curing speed is still lacking, so the ideal sizing effect cannot be achieved.

Method used

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  • Crosslinked material capable of promoting curing of alkyl ketene dimer and preparation method thereof

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Embodiment 1

[0029] The present invention promotes the preparation method of the cross-linked body of alkyl ketene dimer ripening comprising the steps:

[0030] a, under the protection of nitrogen, 7 grams of cationic guar gum powder is added to 480 grams of deionized water, and it is evenly dispersed in deionized water under the mechanical stirring condition of 1000r / min at a rotating speed, until the cationic guar gum powder is completely When dissolving, add 2.5 grams of epichlorohydrin and stir to obtain a mixed reaction system;

[0031] b. Use NaOH to adjust the pH value of the mixed reaction system to 10. After the pH value is adjusted, the mixed reaction system is heated to a crosslinking temperature of 40° C., and the crosslinking reaction is performed for 4 hours;

[0032] c, after the cross-linking reaction finishes, then add 10 grams of weight percent concentration in the mixed reaction system and be 40% polydimethyldiallyl ammonium chloride aqueous solution, 1.8 grams of solid ...

Embodiment 2

[0035] The preparation method of the cross-linked body that promotes the curing of alkyl ketene dimer of the present invention comprises the following steps: the formula ratio is calculated in parts by weight:

[0036] a, under argon protection, add 6 grams of non-ionized guar gum powder to 490 grams of deionized water, and disperse it evenly in deionized water under the mechanical stirring condition of 900r / min at a rotating speed, and wait for the non-ionized guar gum powder When the rubber powder is completely dissolved, add 2 grams of glutaraldehyde and stir to obtain a mixed reaction system;

[0037] b. Use NaOH to adjust the pH value of the mixed reaction system to 11. After the pH value is adjusted, the mixed reaction system is heated to a crosslinking temperature of 50° C., and the crosslinking reaction is performed for 3 hours;

[0038] C, after the cross-linking reaction finishes, add the polyamide polyamine epichlorohydrin aqueous solution that contains 3.5 grams of...

Embodiment 3

[0041] The preparation method of the cross-linked body that promotes the curing of alkyl ketene dimer of the present invention comprises the following steps: the formula ratio is calculated in parts by weight:

[0042] a. Under the protection of nitrogen, 2.5 grams of anionic guar gum powder and 2.5 grams of amphoteric guar gum powder are added to 485 grams of deionized water, and they are evenly dispersed in deionized water under the condition of mechanical stirring at a speed of 1000r / min , when the guar gum powder is completely dissolved, add 0.9 gram of phosphorus oxychloride and 0.9 gram of epichlorohydrin and stir to obtain a mixed reaction system;

[0043] b. Use NaOH to adjust the pH value of the mixed reaction system to 9. After the pH value is adjusted, the temperature of the mixed reaction system is raised to a crosslinking temperature of 60° C., and the crosslinking reaction is performed for 3.5 hours;

[0044] c. After the crosslinking reaction is over, add polyvi...

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Abstract

The invention discloses a crosslinked material capable of promoting curing of alkyl ketene dimer(AKD) and a preparation method thereof. The crosslinked material is characterized by comprising guar gum, synthetic water soluble polymer, cationic assistant, crosslinking agent and water. The preparation is implemented by the following steps: dissolving the guar gum in water, adding the crosslinking agent, stirring, regulating the pH value of the mixed reaction system by using NaOH, raising the temperature to perform a cross-linking reaction, adding the synthetic water soluble polymer and the cationic assistant, cooling to obtain the crosslinked material capable of promoting the curing of the alkyl ketene dimer. The crosslinked material of the invention can improve the degree of sizing of paper, reduces infiltration capacity of liquid, and helps to produce high water resistance. The crosslinked material of the invention reduces the sizing curing time of AKD to 2 hours from the original 2 weeks, improves the utilization rate of paper machine and reduces storage time.

Description

technical field [0001] The invention discloses a cross-linked body which promotes the ripening of alkyl ketene dimer, and also discloses a preparation method of the cross-linked body. Background technique [0002] Alkyl ketene dimer (AKD) sizing is one of the inevitable choices of reactive sizing agents. It has many advantages, such as: improving the strength of paper, reducing the cost of fiber raw materials, and creating conditions; improve the durability of paper, improve the quality of paper, and increase the efficiency of sizing; reduce the pollution of white water discharge, reduce the energy consumption of pulp beating and the heat energy of paper drying; reduce the amount of fluorescent whitening agent, improve the performance of paper machines Operating environment; In addition, AKD sizing is particularly effective in controlling the penetration of paper sheets, so AKD sizing is often used for liquid packaging. [0003] However, AKD also has its defects, such as: t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08J3/24D21H21/16
Inventor 龙柱肖建芳邓海波
Owner NANTONG TONGDI BIOTECH CO LTD
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