Novel cationic surface sizing agent and preparation method thereof

A surface sizing agent and cationic technology, which is applied in the direction of water repellent addition, coating, paper coating, etc., can solve the problem of poor foaming performance of coating liquid, poor ability to resist interference of impurity ions, and storage stability of coating liquid Problems such as poor stability, to achieve the effect of excellent fixation, good stability, and low foaming

Active Publication Date: 2011-08-03
HANGZHOU HANGHUA HARIMA PAPER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has resulted in poor storage stability of the product and poor stability of the prepared coating solution, especially poor anti-interference ability of impurity ions, and the foaming property of the coating solution needs to be improved

Method used

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  • Novel cationic surface sizing agent and preparation method thereof
  • Novel cationic surface sizing agent and preparation method thereof
  • Novel cationic surface sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation of natural polymer emulsifier

[0061] Add 30 parts of raw corn starch, 0.08 parts of natural polymer modifier, and 70 parts of water into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 90°C, and keep the temperature for 2 hours to obtain natural polymer emulsifier A1.

[0062] (2) Preparation of surface sizing agent

[0063] Add 90 parts of the natural polymer emulsifier A1 prepared in the above step (1) into the reaction kettle with a stirrer and a thermometer, raise the temperature to 85°C, stir evenly, and add the initiator 1 dropwise continuously within 3.5 hours, that is 35 parts of 5% aqueous hydrogen peroxide solution, equivalent to 1.75 parts of 100% aqueous hydrogen peroxide solution, 0.1 part of molecular weight modifier dodecanethiol and mixed monomers. The mixed monomer is composed of 30 parts of styrene as a hard monomer, 15 parts of isobutyl methacrylate, 15 parts of butyl acrylate as a soft monomer,...

Embodiment 2~5

[0065] (1) Preparation of natural polymer emulsifier

[0066] The dosages of different components of the natural polymer emulsifier prepared in Table 1 were used, and the natural polymer emulsifiers A2-A5 were prepared according to the preparation process of (1) the natural polymer emulsifier in Example 1.

[0067]

[0068] (2) Preparation of surface sizing agent

[0069] According to (2) the preparation process of the surface sizing agent in Example 1, the surface sizing agents B2-B5 were prepared using the parts by weight of each component in the preparation of the surface sizing agent in Table 2.

[0070]

[0071] The foamability and stability evaluation of embodiment: see table 3

[0072] Foam evaluation method of coating solution: the concentration of starch in the coating solution is 6%, and the concentration of surface sizing agent is 0.03%. The coating solution was kept warm at 60°C. Then take out 600ml coating liquid and move in the stirring juicer. Start ...

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Abstract

The invention provides a novel cationic surface sizing agent and a preparation method thereof, relating to a paper surface treating agent. The traditional sizing agent adopts an emulsifying agent which can result in poor storage stability of products and poor stability of a prepared coating liquid, especially poor interference resistance to foreign ions and the to-be-improved foaminess of the coating liquid. The invention provides a novel cationic surface sizing agent and a preparation method thereof. The novel cationic surface sizing agent comprises 15-50 of natural polymer, 30-70 of water, 0.01-0.1 of natural polymeric modifier, 5-50 of hard monomer, 8-45 of soft monomer, 0.5-10 of cationic monomer, 0.03-5 of evocating agent 1, 0.03-5 of evocating agent 2, 0.03-5 of molecular weight modifier and 0.1-10 of defoamer. The solid content is controlled to be 25-30% by adding water. The invention overcomes the disadvantages in the prior art for producing the surface sizing agent, and the sizing agent provided by the invention is an environment-friendly product which has the advantages of low cost, good stability, high interference resistance to foreign ions, low foaminess and high sizing performance.

Description

technical field [0001] The invention relates to a paper surface treatment agent, in particular to a cationic surface sizing agent and a preparation method thereof. Background technique [0002] Surface sizing agent is one of the surfactants used in papermaking. It is a coating material coated on the surface of paper or cardboard to improve the water resistance of paper and improve the surface properties of paper. It is a new type of papermaking chemical. With the gradual improvement of people's awareness of environmental protection and the continuous development of printing technology and related paper industries, higher requirements are put forward for paper performance, especially surface performance. In the field of papermaking, the improvement of waste paper recycling rate, high pulp yield, and utilization of straw pulp have led to the deterioration of paper performance, so surface sizing is increasingly attracting the attention of industry insiders. [0003] The purpos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H19/20C08F212/08C08F220/18C08F226/02C08F220/34C08F220/56C08F218/08C08F2/24
Inventor 吕建平中田智彦黄兴耀宁吕华汪曾祁
Owner HANGZHOU HANGHUA HARIMA PAPER CHEM
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