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Dispersant for acrylate-acrylonitrile copolymer and preparation method of dispersant

A technology of acrylate and acrylonitrile, which is applied in the field of dispersant of acrylate-acrylonitrile copolymer and its preparation, can solve the problem that the dispersion effect of the dispersant is not ideal and the like, and achieve the effect of improving the dispersion effect

Inactive Publication Date: 2017-09-15
SUZHOU BONA CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the dispersing effect of the polymer dispersant is not ideal enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a four-necked flask equipped with a stirrer, a thermometer, a condensing reflux device and a dropping funnel, the flask was placed in a low-temperature cooling bath, and a certain amount of tetrahydrofuran was added to the flask to adjust the temperature to -60°C. Mix methyl methacrylate, acrylonitrile, and initiator (isopropylphenyllithium) at a molar ratio of 0.08:1, and then use a dropping funnel. Introduce nitrogen into the flask, maintain the temperature of the flask at -60°C, turn on the switch of the dropping funnel and start adding drops to the flask. The sum of time and constant temperature reaction time) is 25h. After the reaction is completed, add water to collapse to obtain a dispersant.

Embodiment 2

[0034] In a four-necked flask equipped with a stirrer, a thermometer, a condensing reflux device and a dropping funnel, the flask was placed in a low-temperature cooling bath, and a certain amount of tetrahydrofuran was added to the flask to adjust the temperature to -40°C. Mix methyl methacrylate, acrylonitrile, and initiator (isopropylphenyllithium) at a molar ratio of 0.50:1, and then use a dropping funnel. Introduce nitrogen into the flask, maintain the temperature of the flask at -40°C, turn on the switch of the dropping funnel and start adding drops to the flask. The sum of time and constant temperature reaction time) is 60h. After the reaction is completed, add water to collapse to obtain a dispersant.

Embodiment 3

[0036]In a four-necked flask equipped with a stirrer, a thermometer, a condensing reflux device and a dropping funnel, the flask was placed in a low-temperature cooling bath, and a certain amount of tetrahydrofuran was added to the flask to adjust the temperature to -60°C. Mix methyl methacrylate, acrylonitrile, and initiator (isopropylphenyllithium) at a molar ratio of 0.50:1, and then use a dropping funnel. Introduce nitrogen into the flask, maintain the temperature of the flask at -60°C, turn on the switch of the dropping funnel and start adding drops to the flask. The sum of time and constant temperature reaction time) is 40h. After the reaction is completed, add water to collapse to obtain a dispersant.

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PUM

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Abstract

The invention discloses a dispersant for an acrylate-acrylonitrile copolymer. The dispersant is a block polymer with the following molecular structure as shown in the description wherein R1 is H or methyl, R2 is C1-4 alkane, and m and n are positive integers. The dispersant for the acrylate-acrylonitrile copolymer, provided by the invention, has a molecular structure comprising a block copolymer of an acrylate repeating unit and an acrylonitrile repeating unit, thereby improving a dispersion effect of the dispersant.

Description

technical field [0001] The technical field of the dispersant of the present invention particularly relates to a dispersant for an acrylate-acrylonitrile copolymer and a preparation method thereof. Background technique [0002] In the chemical industry such as coatings, the dispersion of pigments is an important part of coating manufacturing technology. In order to obtain uniform and stable dispersion of organic and inorganic pigments in coatings, dispersants are often used. Dispersants play an important role in the storage of coatings, coating operations, the formation of coating films, and the performance of coatings. Although traditional dispersants show effective dispersion stabilization in aqueous dispersion media, because of their strong adsorption of small molecules on the surface of pigment particles, they are easy to desorb from the surface of the particles, resulting in re-agglomeration or precipitation of the dispersed particles. The long-term stability of the pa...

Claims

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Application Information

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IPC IPC(8): C08F220/40C08F220/14C08F4/48
CPCC08F220/40C08F4/482C08F220/14
Inventor 李维格
Owner SUZHOU BONA CHEM TECH