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Preparation method for negative ion organosilicon modified polyacrylate paper reinforcing agent

A technology of polyacrylate and paper strengthening agent, which is applied in the direction of adding strengthening agent, which can solve the problems of paper folding resistance and moisture resistance not being very good, not fully improved, paper printing dusting phenomenon, etc., to achieve monomer type Wide range of selection and composition, increased migration speed, ease of application and generalization

Active Publication Date: 2014-02-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the existing paper-making surface sizing agent treats the paper, the paper's folding resistance and moisture resistance are not very good, and the powder dropping phenomenon in paper printing has not been fully improved.

Method used

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  • Preparation method for negative ion organosilicon modified polyacrylate paper reinforcing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) In parts by mass, weigh 1 part of acrylic acid, 5 parts of hydroxyethyl methacrylate, 15 parts of butyl acrylate, 5 parts of methyl methacrylate, and 1 part of γ-methacryloyl Oxypropyltrimethoxysilane, 10 parts of isopropanol, 0.5 parts of azobisisobutyronitrile, 1.5 parts of triethylamine and 125 parts of deionized water;

[0023] 2) Add acrylic acid, hydroxyethyl methacrylate, butyl acrylate, methyl methacrylate, γ-methacryloxypropyl trimethyl to a four-necked dry flask equipped with a reflux condenser, air guide tube, and thermometer Oxysilane, isopropanol and azobisisobutyronitrile, then blowing nitrogen to raise the temperature to 70°C, reacting at 70°C for 4 hours under the protection of nitrogen to obtain system A;

[0024] 3) Cool system A to 25°C, then add triethylamine, neutralize for 30 minutes, then stir and add deionized water heated to 80°C at a speed of 1000 rpm, then increase the stirring speed and stir at a high speed Disperse for 0.5 hours to make ...

Embodiment 2

[0026] 1) In parts by mass, weigh 2 parts of acrylic acid, 7 parts of hydroxypropyl acrylate, 15 parts of propyl acrylate, 10 parts of butyl methacrylate, and 1 part of γ-methacryloyloxy Propyltrimethoxysilane, 12 parts of isopropanol, 0.7 parts of azobisisoheptanonitrile, 2.2 parts of triethylamine and 130 parts of deionized water;

[0027] 2) Add acrylic acid, hydroxypropyl acrylate, propyl acrylate, butyl methacrylate, γ-methacryloxypropyl trimethoxy to a four-necked dry flask equipped with a reflux condenser, air guide tube, and thermometer Silane, isopropanol and azobisisoheptanonitrile, then the temperature was raised to 75°C after passing through nitrogen, and reacted at 75°C for 5 hours under the protection of nitrogen to obtain system A;

[0028] 3) Cool system A to 30°C, then add triethylamine, neutralize for 30 minutes, then stir and add deionized water heated to 80°C at a speed of 1000 rpm, then increase the stirring speed and stir at a high speed Disperse for 0.5...

Embodiment 3

[0030] 1) In parts by mass, weigh 3 parts of acrylic acid, 10 parts of hydroxypropyl methacrylate, 20 parts of butyl acrylate, 10 parts of propyl methacrylate, and 2 parts of γ-methacryloyl Oxypropyltrimethoxysilane, 15 parts of isopropanol, 0.7 parts of dibenzoyl peroxide, 2.5 parts of triethylamine and 135 parts of deionized water;

[0031] 2) Add acrylic acid, hydroxypropyl methacrylate, butyl acrylate, propyl methacrylate, γ-methacryloxypropyl trimethylmethacrylate to a four-necked dry flask equipped with a reflux condenser, an air guide tube, and a thermometer Oxysilane, isopropanol and dibenzoyl peroxide, and then the temperature was raised to 85°C after passing through nitrogen, and reacted at 85°C for 5 hours under the protection of nitrogen to obtain system A;

[0032] 3) Cool system A to 35°C, then add triethylamine, neutralize for 30 minutes, then stir and add deionized water heated to 80°C at a speed of 1000 rpm, then increase the stirring speed and stir at a high ...

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Abstract

The invention relates to a preparation method for a negative ion organosilicon modified polyacrylate paper reinforcing agent. A transparent negative ion organosilicon modified polyacrylate emulsion is obtained by solution polymerization, by using methylacrylic acid, functional vinyl monomers, lipophilic monomers and gamma-methacryloxy propyl trimethoxyl silane as comonomers and isopropanol as a solvent and a chain transfer agent to carry out free radical polymerization of acrylic monomers, and through the steps of cooling, triethylamine neutralization and water dispersion. The obtained negative ion organosilicon modified polyacrylate paper reinforcing agent can not only effectively increase paper surface strength and folding endurance but also increase waterproof property of the paper surface. Besides, due to the addition of gamma-methacryloxy propyl trimethoxyl silane, adhesion properties between fibers and inorganic fillers are increased; and defects of ash and fiber falling during a printing process of the paper. Meanwhile, the product is simple in preparation process, low in raw material cost and simple in glue-applying process and can be easily applied and popularized in real industries.

Description

technical field [0001] The invention belongs to the field of preparation of fine chemicals, in particular to a method for preparing an anionic organosilicon-modified polyacrylate paper strengthening agent. Background technique [0002] With the rapid development of modern paper manufacturing and printing technology, especially since the realization of high-speed printing technology, the requirements for paper strength are getting higher and higher. Therefore, increasing the physical strength of paper and reducing lint and powder loss during printing are the basic requirements of the modern paper industry. . At present, the methods used to enhance the physical properties of paper are mainly internal sizing agents and surface sizing agents. Paper surface sizing agents are a type of chemical additives that are applied to the surface of cardboard to improve the physical strength of paper. The papermaking surface sizing agents used in my country mainly include starch and modifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F230/08C08F220/28C08F220/06D21H21/18
Inventor 沈一丁朱科费贵强李晴龙
Owner SHAANXI UNIV OF SCI & TECH
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