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Surface sizing agent for amphiprotic papermaking and its preparation method

A surface sizing agent and amphoteric technology, which is applied in the field of amphoteric papermaking surface sizing agent and its preparation, can solve the problem of poor stability of the storage stability modulation coating liquid, the foaming property of the coating liquid needs to be improved, and the resistance to impurities Poor ion interference ability and other problems, to achieve significant sizing effect, less foaming, and good stability

Active Publication Date: 2009-04-08
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 the poor ability to resist the interference of impurity ions, the foaming property of the coating solution needs to be improved, and the sizing effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Add 100 parts of the above-made amphoteric polymer emulsifier into a reaction kettle with a stirrer and a thermometer and heat up to 85° C., then add 0.2 parts of tert-butyl peroxybenzoate, and stir evenly at 85° C. Then 40 parts of 5% hydrogen peroxide aqueous solution and mixed monomers were continuously added dropwise within 3 hours. The composition of this mixed monomer is: 20 parts of styrene, 10 parts of N-butyl acrylate, 15 parts of isobutyl methacrylate, 1 part of dimethylaminoethyl methacrylate, and 1 part of maleic anhydride; The temperature is 80°C. After the dropwise addition was completed, the insulation reaction was continued for 1 hour, and then 2 parts of epichlorohydrin was added at 80° C. for 2 hours of reaction. After the reaction, add 35 parts of water and cool to below 40°C, and add 0.1 part of emulsion stabilizer to obtain a surface sizing agent with a solid content of 30%.

[0062] Preparation Example 1-5 Component Consumption Table of Surface S...

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PUM

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Abstract

The invention relates to a surface sizing agent and a preparation method thereof used in amphoteric papermaking. The technical problem to be solved is as follows: novel surface sizing agent which is low in sizing cost, good in storage stability, good in the stability of coating fluid preparation is provided, particularly novel surface sizing agent which is strong in anti-interference capability of impurity ions, small in the foaming property of the coating fluid, good in fixing property on paper fibers and excellent in sizing effect. The invention uses an amphoteric polymer emulsifier to lead a hard monomer, a soft monomer, a positive ion monomer, a negative ion monomer, initiator, molecular weight regulator, crosslinking agent and emulsion stabilizer and the like to be polymerized by emulsion, and products can be manufactured by adding water to lead the solid content to be 25 percent to 30 percent.

Description

technical field [0001] The invention relates to an auxiliary agent for papermaking, in particular to an amphoteric surface sizing agent for papermaking and a preparation method thereof. Background technique [0002] Sizing is one of the important processes in the papermaking process. There are two methods of sizing: internal sizing and surface sizing, and there is also double sizing in which both the inside and the surface of the pulp are sizing. In-pulp sizing is a sizing method in which a sizing agent is added to pulp, and surface sizing is a method in which a layer of adhesive film is coated on the paper surface. In recent years, in order to improve the production performance of papermaking in the paper industry (including improving the quality of paper, improving the surface performance of paper and improving the environment, reducing the pollution of paper machines and related engineering obstacles, etc.), the use of surface sizing agents has become more and more widesp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16
Inventor 吕建平中田智彦吕英杰汪曾祁黄兴耀
Owner HANGZHOU HANGHUA HARIMA PAPER CHEM