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Surface sizing agent and preparation method thereof

A technology of surface sizing agent and initiator, which is applied in the direction of water repellent addition, paper, textile and papermaking, etc., and can solve problems such as unsatisfactory cohesion performance and polymer affecting application performance

Inactive Publication Date: 2018-10-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unsatisfactory cohesive properties, the prepared polymer is too soft when used alone, which will affect the actual application performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Prepare mixed monomer: mix 35 kg of butyl acrylate, 10 kg of glycidyl methacrylate, 60 kg of styrene, and 12 kg of acrylonitrile to make a mixed monomer;

[0014] Preparation of initiator aqueous solution: 2 kg of hydrogen peroxide and 50 kg of deionized water are mixed to make an initiator aqueous solution;

[0015] Add 350 kg of deionized water to a jacketed stirring tank, start stirring, add 50 kg of oxidized corn starch, start heating, when the temperature of the material reaches 90°C, keep it warm for 30 minutes, then add 10 kg of vitamin C and 3 kg of hydrogen peroxide in sequence , and then keep warm for 15 minutes; then add 1.5 kg of emulsifier sodium lauryl polyoxyethylene sulfate; then start to slowly add mixed monomer and initiator aqueous solution at the same time, control the addition time at 4 hours, and when the temperature is 90 ° C after the addition is completed Keep warm for 1 hour to obtain a surface sizing agent.

Embodiment 2

[0017] Prepare mixed monomer: mix 30 kg of butyl acrylate, 15 kg of glycidyl methacrylate, 55 kg of styrene, and 8 kg of acrylonitrile to make a mixed monomer;

[0018] Preparation of initiator aqueous solution: 1 kg of hydrogen peroxide and 50 kg of deionized water are mixed to make an initiator aqueous solution;

[0019] Add 350 kg of deionized water to a jacketed stirring tank, start stirring, add 45 kg of oxidized corn starch, start heating, when the temperature of the material reaches 90°C, keep it warm for 30 minutes, then add 8 kg of vitamin C and 2 kg of hydrogen peroxide in sequence , and then keep warm for 15 minutes; then add 1 kg of emulsifier sodium lauryl polyoxyethylene sulfate; then start to slowly add mixed monomer and initiator aqueous solution at the same time, control the addition time at 2 hours, and when the temperature is 90 ° C after the addition is completed Keep warm for 1 hour to obtain a surface sizing agent.

Embodiment 3

[0021] Prepare mixed monomers: mix 35 kg of butyl acrylate, 15 kg of glycidyl methacrylate, 55 kg of styrene, and 12 kg of acrylonitrile to make mixed monomers;

[0022] Preparation of initiator aqueous solution: 1 kg of hydrogen peroxide and 50 kg of deionized water are mixed to make an initiator aqueous solution;

[0023] Add 350 kg of deionized water to a jacketed stirring tank, start stirring, add 50 kg of oxidized corn starch, start heating, when the temperature of the material reaches 90°C, keep it warm for 30 minutes, then add 8 kg of vitamin C and 3 kg of hydrogen peroxide in sequence , and then keep warm for 15 minutes; then add 1 kg of emulsifier sodium lauryl polyoxyethylene sulfate; then start to slowly add mixed monomer and initiator aqueous solution at the same time, control the addition time at 4 hours, and when the temperature is 90 ° C after the addition is completed Keep warm for 1 hour to obtain a surface sizing agent.

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PUM

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Abstract

The invention discloses a surface sizing agent and a preparation method thereof. The preparation method comprises the following steps: preparing a mixing monomer, and preparing an initiator water solution, adding 350 parts by weight of deionized water to a stirring kettle with a jacket, stirring, adding 45-50 parts by weight of oxidized corn starch, heating, and while a material temperature reaches 90 DEG C, keeping the temperature for 30 minutes, successively adding 8-10 parts by weight of vitamin C, and 2-3 parts by weight of hydrogen peroxide, and heat-insulating for 15 minutes; adding 1-1.5 parts by weight of emulgator sodium dodecyl polyoxyethylene sulfate; and simultaneously and slowly adding the mixing monomer and the initiator water solution, controlling adding time to be within 2-4 hours, after completing the addition, while the temperature is 90 DEG C, keeping the temperature for 1 hour, to obtain the surface sizing agent.

Description

technical field [0001] The invention relates to a surface sizing agent and a preparation method thereof, in particular to a preparation method of a surface sizing agent for papermaking. Background technique [0002] The main varieties of surface sizing agents are starch, guar gum, gelatin, cellulose and hemicellulose, shellac, chitin and alginic acid, rosin gum, etc. With the development of petrochemical industry and polymer synthesis industry, surface sizing agents of acrylate polymer series are more and more widely used in papermaking. It contains homopolymers and copolymers of acrylate monomers. The monomers used to produce acrylate polymers can be divided into three categories: soft monomers, hard monomers and functional monomers. Alkyl (meth)acrylate with low glass transition temperature is a commonly used soft monomer, which has the characteristics of softness, good fluidity, high adhesion and easy wetting of the surface of the adherend. However, due to the unsati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/37C08F212/08C08F220/18C08F220/32C08F220/44
CPCC08F212/08D21H17/37D21H21/16C08F220/1804C08F220/325C08F220/44
Inventor 王彦华
Owner EAST CHINA UNIV OF SCI & TECH