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Comb type carboxylate ternary copolymer and preparation technology thereof

A technology of terpolymer and carboxylate, which is applied in the field of copolymer dispersants and comb-type carboxylate terpolymer dispersants, which can solve the problems of difficulty in controlling the molecular weight of dispersants, high viscosity of the system, and production costs. Expensive and other issues, to achieve the effect of being suitable for industrial scale production, simple preparation process and good adaptability

Inactive Publication Date: 2015-05-06
SHANGHAI SHIDA POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of traditional small molecule dispersants are: the adsorption on the surface of solid particles is not firm, and it is easy to dissociate 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] In the prior art, the application of carboxylate copolymer dispersants is more and more widely used, but the synthesis process of this kind of dispersants still has difficult to overcome the technical problems such as difficult to control the molecular weight, high viscosity of the system, and unsatisfactory dispersion effect on some pesticides. question

Method used

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  • Comb type carboxylate ternary copolymer and preparation technology thereof
  • Comb type carboxylate ternary copolymer and preparation technology thereof
  • Comb type carboxylate ternary copolymer and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Preparation of dispersant:

[0035] Add 1000 parts of double-distilled water and 10 parts of surfactant into a four-necked reaction flask, and heat while stirring; when the temperature of the solution in the reaction flask rises to 60°C, add 200 parts of acrylate, 500 parts of acrylic acid 100 parts of monopolyethylene glycol monomethyl ether maleate and 30 parts of initiator solution were added within 1 hour, and then kept at 60°C for 2 hours; And the carboxylic acid in the system, the neutralization amount is 50% of the carboxyl molar number, makes the target dispersant solution.

[0036] 2) Determination of the dispersibility of the prepared dispersant to inorganic minerals:

[0037] Add 0.4 g of the dispersant prepared in step (1) and 50 ml of distilled aqueous solution to a 100 ml stoppered measuring cylinder, add 1.00 g of solid particles to be dispersed after the dispersant is dissolved, then add the aqueous solution to 100 ml, within 1 min Upside down 30 ti...

Embodiment 2

[0047] Add 1000 parts of double distilled water and 80 parts of surfactant into a four-necked reaction flask, and heat while stirring; when the temperature of the solution in the reaction flask rises to 70°C, add 200 parts of acrylate, 200 parts of acrylic acid homolog Add 400 parts of monopolyethylene glycol monomethyl ether maleate and 60 parts of initiator solution within 5 hours, and then keep the heat for 3 hours; after the heat preservation reaction is completed, it is lowered to room temperature while stirring, and the system is neutralized with sodium hydroxide solution In the carboxylic acid, the neutralization amount is 80% of the carboxyl molar number, and the target dispersant solution is obtained.

[0048] By the operation procedure described in embodiment 1, record above-mentioned dispersant to the suspension rate of calcium carbonate suspension 98.54%, to the suspension rate of aluminum oxide suspension 98.29%, to the suspension of 600g / L imidacloprid aqueous sus...

Embodiment 3

[0050] Add 1000 parts of double distilled water and 20 parts of surfactant into a four-necked reaction flask, and heat while stirring; when the temperature of the solution in the reaction flask rises to 80°C, add 200 parts of acrylate, 500 parts of acrylic acid homolog 200 parts of monopolyethylene glycol monomethyl ether maleate and 60 parts of initiator solution are added within 2 hours, and then the heat preservation reaction is carried out for 5 hours; after the heat preservation reaction is completed, the temperature is lowered to room temperature while stirring, and the system is neutralized with sodium hydroxide solution In the carboxylic acid, the neutralization amount is 80% of the carboxyl molar number, and the target dispersant solution is obtained.

[0051] By the operation step described in embodiment 1, record above-mentioned dispersant to the suspension rate of calcium carbonate suspension 98.57%, to the suspension rate of aluminum oxide suspension 98.02%, to the...

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Abstract

The invention relates to a comb type carboxylate ternary copolymer and a preparation technology thereof. The comb type carboxylate ternary copolymer is synthesized by taking an acrylic acid homologue, mono polyethylene glycol maleate and an acrylate as monomers, and performing free radical copolymerization in a water-phase system. The advantages comprise that the carboxylate ternary copolymer dispersant containing the acrylic acid unit has relatively good water solubility and has good adaptability on pH value of a dispersion system; the dispersant has ideal polymerization degree and carboxyl and polyethylene glycol grafting degree, stabilizes dispersed substances through steric hinerance effect and electrostatic repulsion, and is low in system viscosity; and the dispersant has good dispersing effect on inorganic powders and pesticides.

Description

technical field [0001] The invention relates to a copolymer dispersant, in particular to a comb-shaped carboxylate terpolymer dispersant and its application, which belongs to the invention technology in the field of new materials. Background technique [0002] Polymer dispersants play a role in dispersing and stabilizing the dispersed substances, and are widely used in pigments, dyes, aqueous coal slurry, pesticides and other industries. The disadvantages of traditional small molecule dispersants are: the adsorption on the surface of solid particles is not firm, and it is easy to dissociate from the surface to cause re-aggregation or precipitation. The carboxylate copolymer dispersant can stabilize the system through steric hindrance and electrostatic repulsion, it is insensitive to the temperature, pH value and ionic strength of the system, and can significantly reduce the viscosity of the system. It can maximize the dispersing ability in the water-based system. It has bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C08F290/06C09C1/02C09C1/40C09C3/10A01N25/30C09K23/52
Inventor 任天瑞邢雯张雷马衍峰杜亮亮
Owner SHANGHAI SHIDA POLYMER MATERIAL
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