Surface moisture resisting agent for base paper, production method of surface moisture resisting agent and application of surface moisture resisting agent in papermaking

A production method and anti-moisture agent technology, applied in textiles and papermaking, papermaking, paper coating, etc., can solve the problems of unsatisfactory high-strength base paper ring compressive strength, single function, poor surface strength, etc., and achieve excellent film-forming properties And the transfer performance of the whole film, improve the moisture resistance, reduce the effect of expansion rate

Inactive Publication Date: 2019-05-31
湖北中之天科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent publication numbers CN101787664A and CN103437245A provide acrylamide-based surface sizing agents to replace traditional starches, but the disadvantages of these compounds are that the structure determines the properties, and the properties determine the functions, resulting in relatively single functionality, water resistance, Poor surface strength, unable to meet the ring crush strength of high-strength base paper

Method used

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  • Surface moisture resisting agent for base paper, production method of surface moisture resisting agent and application of surface moisture resisting agent in papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of base paper surface anti-moisture agent of the present embodiment, described method comprises the steps:

[0031] (1) Preparation of cationic polyacrylamide starch polymer: In a 1000L enamel reaction kettle, add 120Kg content of 55% hydroxyacrylamide monomer, 15Kg vinyl tris (isopropoxy) silane, 540Kg content of 16.5% hydrolyzed starch The supernatant was mixed, the temperature was raised to 45°C, 3kg of 30% ammonium persulfate aqueous solution was added dropwise, and then stirred and reacted at 50°C for 5h. After the reaction was finished, it was cooled to room temperature to obtain a cationic polyacrylamide starch polymer with a weight of 675Kg and a solid content of 25%.

[0032] (2) Preparation of anti-moisture agent for base paper: respectively weigh 35Kg of styrene-acrylic surface sizing agent; 675Kg of cationic polyacrylamide starch polymer with a content of 25%. Add it to a high-speed homogeneous disperser in batches, disperse for...

Embodiment 2

[0034] A kind of preparation method of base paper surface anti-moisture agent of the present embodiment, described method comprises the steps:

[0035] (1) Preparation of cationic polyacrylamide starch polymer: In a 1500L enamel reactor, add 120Kg content of 55% hydroxyacrylamide monomer, 20Kg content of 80% acryloyloxyethyltrimethylammonium chloride, 800Kg content of 16.5 % hydrolyzed starch clear solution was mixed, the temperature was raised to 45° C., 3 kg of 30% ammonium persulfate aqueous solution was added dropwise, and then stirred and reacted at 55° C. for 3 hours. After the reaction was finished, it was cooled to room temperature to obtain a cationic polyacrylamide starch polymer with a weight of 930Kg and a solid content of 23%.

[0036] (2) Preparation of anti-moisture agent for base paper: Weigh 105Kg of AKD surface sizing agent; 930Kg of cationic polyacrylamide starch polymer with a content of 23%. Add it to a high-speed homogeneous disperser in batches, dispers...

Embodiment 3

[0038] A kind of preparation method of base paper surface anti-moisture agent of the present embodiment, described method comprises the steps:

[0039] (1) Preparation of cationic polyacrylamide starch polymer: In a 2000L enamel reaction kettle, add 120Kg content of 55% hydroxyacrylamide monomer, 25Kg content of 80% methacryloxyethyltrimethylammonium chloride, 1400Kg The hydrolyzed starch clear solution with a content of 16.5% was mixed, the temperature was raised to 45° C., 3 kg of a 30% ammonium persulfate aqueous solution was added dropwise, and then stirred and reacted at 55° C. for 3 hours. After the reaction, it was cooled to room temperature to obtain a cationic polyacrylamide starch polymer with a weight of 1540Kg, a solid content of 20.5%, and a pH value of 5.

[0040](2) Preparation of anti-moisture agent for base paper: 175Kg of styrene-acrylic surface sizing agent and 1540Kg of cationic polyacrylamide starch polymer with a content of 20.5% were weighed respectively...

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Abstract

The invention relates to a surface moisture resisting agent for base paper, a production method of the surface moisture resisting agent and application of the surface moisture resisting agent in papermaking, and relates to the technical field of papermaking surface sizing. The solid content of the moisture resisting agent is 9-11%, and the moisture resisting agent is prepared from, by mass, 20-25%of a cationic polyacrylamide starch polymer and 5-15% of a styrene-acrylic or AKD surface sizing agent. The moisture resisting agent is obtained through the following steps that 1, hydroxyacrylamidemonomer, third monomer and hydrolyzed starch are polymerized, and a cationic polyacrylamide starch polymer is obtained; 2, the polyacrylamide starch polymer is mixed with the styrene-acrylic or AKD surface sizing agent, and a final product moisture resisting agent for the base paper is obtained. The moisture resisting agent for the base paper not only has the advantages of improving the ring crushstrength of the base paper and resisting damping, but also has the advantages of enhancing high temperature, high humidity and high cold resistance of the base paper. Zero emission of the chlorine content is achieved, the surface moisture resisting agent is environmentally friendly, the production method is easy to implement, the cost is low, and the surface moisture resisting agent is especiallysuitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of papermaking surface sizing, in particular to surface moisture resistance for cultural paper, electrostatic copy paper, bobbin paper, kraft paper, cardboard paper, fruit bag paper, cardboard, and high-strength corrugated paper. agent and its production process. Background technique [0002] With the wide application of paper products, various industries have higher and higher requirements for paper performance. In some parts of southern my country, the high temperature and high humidity environment in summer has a great influence on the strength of base paper. Especially in the production and storage of base paper, the highly humid environment makes the strength and performance of the base paper decrease rapidly or even lose. For example, the paper feeding speed and printing quality will be affected after the printing paper of office supplies is damp. In particular, paper is prone to mildew and moisture ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H19/14D21H19/20C08F251/00C08F220/58
Inventor 彭国启徐保明袁世炬胡荣月谢锐肖涵宇刘诗雨彭镜
Owner 湖北中之天科技股份有限公司
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