Surface sizing agent and preparation method thereof

A surface sizing agent, guar collagen technology, applied in the direction of adding water repellent, can solve the problems of production and environmental impact, slow reaction speed, reduce cationic starch, etc., achieve easy dispersion and use, increase affinity, and improve air permeability Effect

Active Publication Date: 2012-02-29
SHANGHAI DONGSHENG NEW MATERIALS
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its viscosity and stability, ordinary cationic starch cannot be directly used for surface sizing, and must be continuously modified to control its viscosity and ensure the stability of its gelatinized liquid.
To reduce the viscosity of cationic starch, the usual method is to oxidize the starch. At pre

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] (1) In the four-necked flask equipped with stirring, thermometer, dripping pipeline and ventilation pipeline, add 200 parts of ethanol, pass nitrogen, add 200 parts of guar collagen powder under stirring, and after 10 minutes of dispersion at room temperature, dropwise add 40 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride, a cationic etherifying agent, was added dropwise for 15 minutes. After the dropwise addition was completed, sodium hydroxide solution was added to adjust the pH value of the solution to 11.0, and the temperature was heated up. to 70°C, react at this temperature for two hours to obtain cationic guar gum, and cool the system to 30°C;

[0019] (2) adjust the pH value of solution with hydrochloric acid to 4.0, get 0.2 part of peracetic acid and join it in the reactor and mix with cationic guar gum, be warming up to 40 ℃ of reaction 2 hours;

[0020] (3) after above-mentioned solution temperature is reduced to 25 ℃, add 0.2...

Example Embodiment

[0021] Example 2

[0022] (1) In the four-necked flask equipped with stirring, thermometer, dripping pipeline and ventilation pipeline, add 400 parts of ethanol, pass nitrogen, add 200 parts of guar collagen powder under stirring, disperse at room temperature for 10 minutes, add dropwise 80 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride, a cationic etherification agent, was added dropwise for 10 minutes. After the dropwise addition, sodium hydroxide solution was added to adjust the pH value of the solution to 11.5, and the temperature was heated up. to 60°C, react at this temperature for three hours to obtain cationic guar gum, and cool the system to 25°C;

[0023] (2) adjust the pH value of solution with hydrochloric acid to 3.0, get 0.4 part of peroxysulfuric acid and join it in the reactor and mix with cationic guar gum, be warming up to 50 ℃ of reaction 1.5 hours;

[0024] (3) after above-mentioned solution temperature is lowered to 25 ℃, add 0.4 part of visc...

Example Embodiment

[0025] Example 3

[0026] (1) In the four-necked flask equipped with stirring, thermometer, dripping pipeline and ventilation pipeline, add 300 parts of ethanol, pass nitrogen, add 200 parts of guar collagen powder under stirring, and after 10 minutes of dispersion at room temperature, dropwise add 70 parts of 3-chloro-2-hydroxypropyltrimethylammonium chloride, a cationic etherifying agent, was added dropwise for 15 minutes. After the dropwise addition, a sodium hydroxide solution with a weight concentration of 30% was added to adjust the pH of the solution. The value is 10.5, heated to 55°C, reacted at this temperature for 3.5 hours to obtain cationic guar gum, and the system was cooled to 30°C;

[0027] (2) adjust the pH value of solution with hydrochloric acid to 4.0, get 2 parts of peracetic acid and join in the reactor and mix with cationic guar gum, be warming up to 70 ℃ of reaction 0.5 hour;

[0028] (3) after above-mentioned solution temperature is lowered to 25 ℃, ad...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a surface sizing agent and a preparation method thereof. The preparation method comprises the following steps: 1, adding an aqueous solution of a cationic etherifying agent to a mixture of guar gum raw powder and an aqueous solution of a low carbon alcohol under an inert atmosphere, such as a nitrogen atmosphere, adding an alkali catalyst, and reacting to obtain a cationic guar gum product; 2, adjusting the pH value of a system of the product obtained in step 1 to 1-4 by an acidic neutralizer, adding a superacidic chemical, and reacting; and 3, adding a viscosity stabilizing agent, and simultaneously adjusting the PH value to 6-9, reacting, and collecting the surface sizing agent from reaction products. The surface sizing agent of the invention, which has the characteristics of very good fluidity, easy dispersion and usage, exquisite and stable gum solution, and rapid hydration swelling, is an ideal surface sizing agent, and simultaneously is a multifunctional wet-end additive. The surface sizing agent is suitable for sizing various surfaces of cultural paper, newspaper, art paper and special paper.

Description

technical field [0001] The invention relates to a paper surface sizing agent and a preparation method thereof. technical background [0002] In order to endow the paper surface with good smoothness and strength, people often solve the problem by surface sizing and modifying starch. Usually, oxidized starch is used, but this starch has poor affinity with fibers. When broken paper is recycled, most of it enters white water. system, which increases the BOD and COD values ​​of the system, which is very harmful to environmental protection. At the same time, it affects the Zeta potential of the system, which in turn affects paper machine making, and the surface strength is not good. Because cationic starch has a strong adsorption effect on anionic fibers and fillers, it can It is well retained by fibers; and effectively reduces environmental pollution. Therefore, domestic and foreign are competing to study cationic starch suitable for paper surface sizing. However, due to its vi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): D21H21/16
Inventor 施晓旦李改霞王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap