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Efficient surface sizing agent

A surface sizing agent, high-efficiency technology, applied in the field of papermaking additives, can solve the problems of unsatisfactory sizing effect of surface sizing agent, easy hydrolysis of sizing agent in pulp, high cost of sewage treatment, etc., and achieve excellent sizing effect , Reduce the requirements of the slurry purification system, and the effect of less foaming

Inactive Publication Date: 2009-07-15
HUBEI JIAYUN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention mainly solves the technical problems in the traditional papermaking process, such as the sizing agent in the pulp is easily hydrolyzed, the loss is large, and the cost of sewage treatment is high.
[0004] The invention also solves the technical problems of the existing surface sizing agent, such as unsatisfactory sizing effect and high use cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: first pour 45 parts of water (100 parts in total, each part is 100 g, the same below) into a reaction kettle and heat to 75 ° C, then melt 18 parts of solid alkyl ketene dimer at high temperature, Under the condition of continuous stirring, put it into the reaction kettle and fully mix it with water, then add 18 parts of starch and acrylamide graft copolymer, and continue stirring for 30 minutes to obtain an emulsion; then add 11 parts of polyamide amide resin to the emulsion, 8 parts of methacryloyloxyethyltrimethylammonium chloride, after stirring evenly, homogenize through a high-pressure homogenizer, and become a high-efficiency surface sizing agent product after cooling down.

Embodiment 2

[0018] Example 2: first pour 50 parts of water (100 parts in total, each part is 100 g, the same below) into the reaction kettle and heat to 75 ° C, then melt 16 parts of solid alkyl ketene dimer at high temperature, Under the condition of continuous stirring, put it into the reactor and mix it fully with water, then add 18 parts of starch and acrylamide graft copolymer, and stir for 30 minutes to obtain an emulsion; then add 10 parts of polyamide amide resin to the emulsion, 8 Dodecyltrimethylammonium chloride, after stirring evenly, homogenize through a high-pressure homogenizer, and become a high-efficiency surface sizing agent product after cooling down.

Embodiment 3

[0019] Example 3: first pour 55 parts of water (100 parts in total, each part is 100 g, the same below) into the reactor and heat to 75 ° C, then melt 14 parts of solid alkyl ketene dimer at high temperature, Under the condition of continuous stirring, put it into the reaction kettle and mix it fully with water, then add 15 parts of starch and acrylamide graft copolymer, and stir for 30 minutes to obtain an emulsion; then add 10 parts of polyethyleneimine resin to the emulsion, 6 parts of tetradecyltrimethylammonium chloride, after stirring evenly, homogenize through a high-pressure homogenizer, and become a high-efficiency surface sizing agent product after cooling down.

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Abstract

A high-efficiency surface sizing agent is mainly made from the following components by mass percent: 10-18% of an alkyl ketene dimmer, 10-18% of a graft copolymer of starch and acrylamide, 8-16% of polyamine resin, 3-10% of quaternary ammonium salt of trimethyl ammonium chloride and 45-65% of water. The surface sizing agent has the advantages of excellent sizing effect, good film forming property, wide application range and environmental protection. Using the surface sizing agent, the surface sizing agent is easily kept on a surface of a paper sheet, which obviously improves indexes of the paper sheet after sizing, such as surface strength, smoothness, Cobb value, printability and the like, and eliminates phenomena such as linting, dusting, pasting and the like during a finished paper printing process. And, the surface sizing agent can greatly reduce sizing procedures of paper making and requirement for a slurry clarifying system, thus the surface sizing agent can completely replace internal sizing to reduce sizing cost on the paper sheet.

Description

technical field [0001] The invention relates to a papermaking auxiliary agent, in particular to a high-efficiency surface sizing agent. Background technique [0002] In the current papermaking process, most cultural paper manufacturers have added AKD neutral sizing agent to the pulp. Compared with acid sizing, AKD neutral sizing agent has the advantages of convenient sizing, low cost, and no corrosion of equipment. But its disadvantages are also obvious: the sizing agent is easy to hydrolyze, the loss is large, the sizing lags behind, and the burden of sewage treatment is increased. Although some papermaking enterprises use surface sizing, due to the limitation of sizing effect and cost, general factories only use it as auxiliary sizing, and some sizing agents need to be added to the pulp, otherwise the sizing degree is unqualified. Even if all the existing surface sizing agents are used for sizing, the cost of sizing will increase significantly, so the paper mill cannot ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 胡新仿
Owner HUBEI JIAYUN CHEM TECH
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