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Carboxylate terpolymer dispersing agent and preparation process

A carboxylate terpolymer and its preparation technology are applied in the field of new polymer materials --- dispersant type surfactants, which can solve the problem of weak adsorption on the surface of solid particles, difficulty in controlling the molecular weight and increasing the difficulty of post-processing and other issues to achieve the effect of novel structure, good adaptability and short production cycle

Inactive Publication Date: 2017-04-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of prior art dispersants are: small molecules, weak adsorption on the surface of solid particles, and easy dissociation from the surface to cause re-aggregation or precipitation
The disadvantages of these methods are: substances with irritating odor are introduced into the product, the environment is polluted, the difficulty of post-processing is increased, and the production cost is expensive
[0003] The application of carboxylate and derivative copolymer dispersant is more and more extensive, and the synthetic technology of prior art carboxylate and derivative copolymer dispersant still exists the difficult control of molecular weight size, system viscosity is high, and dispersing effect is not good. Ideal, poor resistance to hard water and other insurmountable technical problems

Method used

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  • Carboxylate terpolymer dispersing agent and preparation process
  • Carboxylate terpolymer dispersing agent and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of solid phase catalyst:

[0038] Will 15 part strontium nitrate, 8 Copper Chloride, 5 parts phenolic resin and 55 Parts deionized water mixed to adsorb on diameter 3mm, 4A Molecular sieve, in 100 ～ 150 aging at ℃ 7 hours, the solid phase catalyst A 。

[0039] Will 20 part strontium nitrate, 9 Copper Chloride, 6 parts phenolic resin and 70 Parts deionized water mixed to adsorb on diameter 3mm, 4A Molecular sieve, in 100 ～ 150 aging at ℃ 7 hours, the solid phase catalyst B 。

[0040] Will 11 part strontium nitrate, 5 Copper Chloride, 4 parts phenolic resin and 50 Parts deionized water mixed to adsorb on diameter 3mm, 4A Molecular sieve, in 100 ～ 150 aging at ℃ 7 hours, the solid phase catalyst C。

Embodiment 2

[0042] Preparation of dispersant:

[0043] Will 110 parts methacrylic acid, 30 parts maleic anhydride and 50 Parts butyl methacrylate dissolved in 200 Parts of aqueous solution system to obtain a monomer mixture.

[0044] Molecular sieve A Fixed in a glass column tube, the monomer mixture is used to control the column retention time as 2-3 minutes through 65 ℃ glass tubes and keep them in the reaction kettle 2 ～ 3 hours, the temperature of the reactor is 70 ℃. Cool to room temperature after completion of the reaction, neutralize the carboxylic acid in the system with sodium hydroxide solution, neutralize to pH exist 8-9 In between, the target dispersant solution was prepared. The solution was spray dried to obtain the target dispersant powder. (Potassium bromide is used to make tablets, and the results of Fourier transform infrared characterization are: -OH stretching vibration peak 3435cm -1 , the stretching vibration peaks of methyl, meth...

Embodiment 3

[0046] Determining the dispersibility of the prepared dispersant to inorganic minerals:

[0047] Towards 100 ml Add to a stoppered measuring cylinder 0.4 g Example 2 Prepared dispersants and 50 ml Distilled water solution, add after the dispersant dissolves 1.00 g Solid particles to be dispersed, then add water to 100 ml ,exist 1 minute upside down 30 Second-rate. reverse first 180 °, and then return to the original position as 1 Second-rate. Place the measuring cylinder vertically on the 25 ℃ super constant temperature aqueous solution bath, static without vibration, avoid direct sunlight, 30 minutes Straw 15 s Pull out the upper layer 90 ml suspension. the remaining 10 ml The suspension is transferred to a weighed mass of m 1 In a dry petri dish, rinse the graduated cylinder with distilled water to ensure that all the sediment in the graduated cylinder is transferred to the petri dish, put the petri dish into the oven, 80 ℃ constant t...

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Abstract

The invention belongs to dispersing agents, and discloses a carboxylate terpolymer dispersing agent and a preparation process. A conventional dispersing agent has the defects of being liable to reassemble or precipitate as molecules are small and can be easily dissociated from surfaces. The carboxylate terpolymer dispersing agent comprises the following dispersing agent monomers in corresponding parts by mass: 10-40 parts of crylic acid, 10-20 parts of maleic anhydride and 10-50 parts of acrylic ester. The preparation process comprises the following steps: preparing a monomer mixed liquid, preparing solid-phase catalyst granules, immobilizing a molecular sieve in which the catalyst is immobilized in a glass tube nest, feeding the monomer mixed liquid through the glass tube nest of 60-70 DEG C within 5-15 minutes, and introducing into a reaction kettle; keeping the temperature at 60-80 DEG C for 2-3 hours; cooling to the room temperature, and neutralizing with alkali; performing reduced pressure distillation; performing spray drying, thereby obtaining dispersing agent powder. The carboxylate terpolymer dispersing agent has the advantages of being simple in preparation process, stable in product quality, free of environment pollution in the preparation process, high in dispersion efficiency, small in addition quantity and wide in application range.

Description

technical field [0001] The invention belongs to new polymer materials --- A dispersant type surfactant, specifically a carboxylate terpolymer dispersant and a preparation process. Background technique [0002] Dispersants play a role in dispersing and stabilizing the dispersed substances, and have important applications in industries such as pigments, dyes, aqueous coal slurry, and pesticides. Disadvantages of prior art dispersants are: small molecules, weak adsorption on the surface of solid particles, and easy dissociation from the surface resulting in re-aggregation or precipitation. Carboxylate and its derivative copolymer dispersants can stabilize the system through steric hindrance and electrostatic repulsion, and have better dispersion effects than small molecule dispersants. Compared with traditional dispersants such as lignosulfonate and naphthalenesulfonate formaldehyde condensate, carboxylate and its derivatives copolymer dispersants appear as white powders...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/06C08F220/18C08F4/10
Inventor 任天瑞关策张雷刘如军李新忠
Owner SHANGHAI NORMAL UNIVERSITY