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Polymeric dispersant and environment-friendly surface sizing agent prepared by utilizing the same

A technology of polymerizing dispersant and surface sizing agent, which is applied in the direction of water repellent addition, etc., can solve the problems of high VOC and residue, and achieve the effects of low Cobb value, good water resistance, and low residual monomer in emulsion

Active Publication Date: 2019-03-29
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, a kind of sizing agent disclosed by CN106223116B has improved the Cobb value of paper, but the synthetic product has more VOC residues

Method used

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  • Polymeric dispersant and environment-friendly surface sizing agent prepared by utilizing the same
  • Polymeric dispersant and environment-friendly surface sizing agent prepared by utilizing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of polymeric dispersant:

[0032] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 100 grams of maleic anhydride and 600 grams of polyvinyl alcohol, heat and melt, and react at 80° C. for 3 hours. The temperature was lowered to 40°C and 120 g of chlorosulfonic acid was added, and the reaction was continued for 1 hr.

[0033] 2. Preparation of environment-friendly surface sizing agent:

[0034] In a 1000ml four-neck flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 10 grams of polymeric dispersant, 500 grams of deionized water, and 4 grams of acetic acid, then heat up to 80°C, and add 1 grams of ammonium persulfate. After reacting for 10 minutes, 180 g of mixed monomers (100 g of styrene, 80 g of ethyl acrylate) were slowly added dropwise, and the addition was completed within 1.5 hr. 0.5 g of ammonium persulfate was added to continue the reaction for 1 hr. Af...

Embodiment 2

[0036] 1. Preparation of polymeric dispersant:

[0037] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer, and a thermometer, add 100 grams of maleic anhydride and 650 grams of polyvinyl alcohol, heat to dissolve, and react at 90°C for 3 hours. Cool down to 50°C and add 125g of chlorosulfonic acid to continue the reaction for 1.5hr.

[0038] 2. Preparation of environment-friendly surface sizing agent:

[0039] In a 1000ml four-neck flask equipped with a condenser, dropping device, stirrer, and thermometer, add 20 grams of polymeric dispersant, 600 grams of deionized water, and 4 g of acetic acid, then heat up to 90° C., and add 1 g of potassium persulfate. After reacting for 10 minutes, 200 grams of mixed monomers (100 g of styrene, 100 g of n-butyl acrylate) were slowly added dropwise, and the addition was completed in 2.0 hours. 0.5 g of potassium persulfate was added to continue the reaction for 1 hr. After cooling, filter through a 32...

Embodiment 3

[0041] 1. Preparation of polymeric dispersant:

[0042] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 100 grams of maleic anhydride and 700 grams of polyvinyl alcohol, heat to dissolve, and react at 95° C. for 3 hours. Cool down to 50°C and add 130g of chlorosulfonic acid to continue the reaction for 2.5hr.

[0043] 2. Preparation of environment-friendly surface sizing agent:

[0044] In a 1000ml four-necked flask equipped with a condenser, dropping device, stirrer, and thermometer, add 35 grams of polymeric dispersant, 530 grams of deionized water, 4 g of acetic acid, heat up to 90 ° C, and add 3 g of dibenzoyl peroxide . After 15 minutes of reaction, 160 g of mixed monomers (100 g of styrene, 60 g of isooctyl acrylate) were slowly added dropwise, and the addition was completed in 2.0 hr. 1.0 g of potassium persulfate was added to continue the reaction for 1 hr. After cooling, filter through a 325-mesh filter ...

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Abstract

A polymeric dispersant is disclosed. A preparation method of the polymeric dispersant includes mixing maleic anhydride and polyvinyl alcohol, heating the mixture until the mixture is molten, then performing polycondensation, cooling the product after the reaction is finished, adding chlorosulfonic acid, and preparing the polymeric dispersant after the reaction is finished. The invention also discloses an environment-friendly surface sizing agent. A preparation method of the surface sizing agent includes mixing the polymeric dispersant, acetic acid and water, adding an initiator, reacting the mixture, adding (methyl) styrene and (meth)acrylate type monomers, and sufficiently reacting the mixture to obtain the surface sizing agent. The surface sizing agent is a high-performance environmentally friendly product used for paper surface sizing, is used together with starch for surface sizing of base paper, and can significantly improve water tolerance of paper. The polymeric dispersant has good emulsifying performance so that a synthesized emulsion is low in monomer residue.

Description

technical field [0001] The invention relates to the field of surface sizing agent preparation, in particular to a water-resistant and environment-friendly paper surface sizing agent. Background technique [0002] The addition of surface sizing agent can improve the properties of paper sheets or increase the surface properties, strength and water resistance of paper or paperboard. [0003] Surface sizing agents are of great significance to the development of the paper industry, and paper workers also hope to improve paper performance and product grades through surface sizing, so as to meet the continuous development needs of current papermaking, printing and related fields. The performance of surface sizing agent products directly affects the effect of surface sizing. As a new product in recent years, polymer surface sizing agent has developed rapidly in the paper industry due to its unique properties. It can meet the production needs of various paper products and provide a ...

Claims

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Application Information

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IPC IPC(8): D21H21/16C08F8/38C08F8/46C08F290/12C08F212/08C08F220/18C08F2/26
CPCD21H21/16C08F2/26C08F8/38C08F290/12C08F8/46C08F116/06C08F220/1808C08F220/1804C08F220/1802
Inventor 施晓旦谢中怡尹东华金霞朝
Owner SHANGHAI DONGSHENG NEW MATERIALS
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