Method for preparing nanometer TiO2 styrene-acrylic latex surface sizing agent

A technology of surface sizing agent and styrene-acrylic latex, which is applied in the direction of water-repellent addition, can solve the problems of chitosan styrene-acrylic latex surface sizing agent with complex raw materials, high preparation cost, and cumbersome preparation methods. The effect of less amount, low preparation cost and simple preparation process

Inactive Publication Date: 2013-04-03
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this chitosan styrene-acrylic latex surface sizing agent raw material is complicated and various, and preparation method is loaded down with

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: A kind of nano TiO 2 The preparation method of styrene-acrylic latex surface sizing agent includes the following steps:

[0023] (1) Dissolve 5kg of nano titanium dioxide particles with a particle size range of 100~200nm in 20kg of ethanol with a volume fraction of 99% and stir evenly, add 2kg of silane coupling agent KH-550 and adjust the pH with 25wt% ammonia solution To 9~10, stir and react at room temperature for 0.5h to obtain emulsion A;

[0024] (2) Dissolve 40kg of quaternary ammonium cationic starch with a degree of substitution of 0.01 in 90kg of water and stir evenly, add 0.1kg of glacial acetic acid and stir at 60℃ for 10 minutes, add 0.02kg of solid FeSO 4 Catalyst, 10kg styrene and 5kg butyl acrylate, perform the first stage reaction at 60℃ for 50 minutes, then add 0.01kg solid FeSO 4 The second-stage reaction of the catalyst is carried out at 60°C for 20 minutes to obtain emulsion B; the addition rate of styrene is controlled at 0.5kg / min; the additi...

Example Embodiment

[0026] Example 2: A kind of nano TiO 2 The preparation method of styrene-acrylic latex surface sizing agent includes the following steps:

[0027] (1) Dissolve 30kg of nano titanium dioxide particles with a particle size range of 100~200nm in 95kg of 99% ethanol and stir evenly, add 50kg of silane coupling agent KH-550 and adjust the pH with 25wt% ammonia solution To 9~10, stir and react at room temperature for 2 hours to obtain emulsion A;

[0028] (2) Dissolve 40kg of quaternary ammonium cationic starch with a degree of substitution of 0.01 in 30kg of water and stir evenly, add 20kg of glacial acetic acid and stir at 95℃ for 10 minutes, add 0.1kg of solid FeSO 4 Catalyst, 50kg styrene and 30kg butyl acrylate, carry out the first stage reaction at 60℃ for 50 minutes, then add 0.2kg solid FeSO 4 The second-stage reaction of the catalyst is carried out at 60°C for 20 minutes to obtain emulsion B; the addition rate of styrene is controlled at 1kg / min; the addition rate of butyl acryla...

Example Embodiment

[0030] Example 3: A kind of nano TiO 2 The preparation method of styrene-acrylic latex surface sizing agent includes the following steps:

[0031] (1) Dissolve 20kg of nano titanium dioxide particles with a particle size range of 200~300nm in 60kg of pure ethanol and stir evenly, add 30kg of silane coupling agent KH-560 and adjust the pH to 7~8 with 20wt% ammonia solution. Stir and react at room temperature for 1 hour to obtain emulsion A;

[0032] (2) Dissolve 30kg of quaternary ammonium cationic starch with a degree of substitution of 0.1 in 60kg of water and stir evenly, add 10kg of glacial acetic acid and stir at 80℃ for 20 minutes, add 0.05kg of solid FeSO 4 Catalyst, 20kg styrene and 15kg butyl acrylate, carry out the first stage reaction at 80℃ for 60 minutes, then add 0.1kg solid FeSO 4 The second-stage reaction of the catalyst is carried out at 80°C for 60 minutes to obtain emulsion B; the addition rate of styrene is controlled at 0.6kg / min; the addition rate of butyl acryl...

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Abstract

The invention relates to a method for preparing a nanometer TiO2 styrene-acrylic latex surface sizing agent, comprising the steps of dissolving nanometer TiO2 particles into ethanol, uniformly stirring, adding a silane coupling agent, regulating the pH to 6-10 by using an ammonia solution, stirring at room temperature, and reacting to obtain an emulsion A; dissolving cationic starch into water, uniformly stirring, adding glacial acetic acid, stirring, adding a catalyst, styrene and butyl acrylate, carrying out the first-stage reaction for 50-70min at the temperature of 60-95 DEG C, adding the catalyst, and carrying out the second-stage reaction at the temperature of 60-95 DEG C to obtain an emulsion B; and adding the emulsion B into the emulsion A at the temperature of 60-70 DEG C, stirring, and reacting for 30-60min. The method disclosed by the invention has the advantages of less raw material, low preparation cost and simpleness; and the prepared nanometer TiO2 styrene-acrylic latex surface sizing agent has the advantages that the water-resisting property is strong; the surface sizing agent consumption for the sizing of unit paper is little; and the application effect of surface sizing processes of paperboards and writing papers is good.

Description

technical field [0001] The present invention relates to a kind of nano TiO 2 The invention discloses a preparation method of a styrene-acrylic latex surface sizing agent, belonging to the technical field of surface sizing agent preparation. Background technique [0002] Surface sizing is a process in the process of paper or cardboard processing. It is usually located at the end of the drying section of the paper machine. When the paper is not completely dry but has a certain strength, a layer of glue is sprayed on the paper and paper after subsequent drying. A layer of adhesive film is formed on the surface of the cardboard to achieve the purpose of changing the surface properties of the paper or cardboard. From the perspective of the development of the paper industry, surface sizing of paper is one of the indispensable processes. Through surface sizing, surface additives can be added to improve the performance of paper sheets or increase the water resistance of paper or ca...

Claims

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Application Information

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IPC IPC(8): D21H21/16C08F251/00C08F212/08C08F220/18
Inventor 王正顺
Owner QILU UNIV OF TECH
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