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A kind of multiple copolymer surfactant and preparation technology thereof

A preparation process and terpolymer technology, applied in the field of synthesis of new copolymer dispersants, can solve the problems of difficult to control the molecular weight of dispersants, weak adsorption of solid particles, and increased difficulty in post-processing, etc. Large-scale production, good dispersion effect, good adaptability effect

Active Publication Date: 2019-08-20
SHANGHAI NORMAL UNIVERSITY
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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
[0005] Carboxylate copolymer dispersants are more and more widely used, but the synthesis process of this kind of dispersants still has difficult technical problems such as difficult to control the molecular weight, high viscosity of the system, and unsatisfactory dispersion effect.

Method used

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  • A kind of multiple copolymer surfactant and preparation technology thereof
  • A kind of multiple copolymer surfactant and preparation technology thereof
  • A kind of multiple copolymer surfactant and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) Preparation of dispersant:

[0033] Add 1000 parts of double distilled water, 10 parts of chain transfer agent, and the composition of the chain transfer agent is 1:1 sodium bisulfite and isopropanol aqueous solution into a four-necked reaction flask, and heat while stirring; when the solution in the reaction flask When the temperature rises to 60°C, add 200 parts of styrene, 500 parts of itaconic acid, 250 parts of hydroxyethyl methacrylate and 30 parts of initiator solution within 3 hours, and then keep it at 60°C for 2 hours; After finishing, drop to room temperature while stirring, neutralize the carboxylic acid in the system with sodium hydroxide solution, and the neutralization amount is 50% of the carboxyl mole number, so that the target dispersant solution is obtained.

[0034] 2) Determination of the dispersibility of the prepared dispersant to inorganic minerals:

[0035] Add 0.4 g of the dispersant prepared in step (1) and 50 ml of distilled aqueous solut...

Embodiment 2

[0046] Add 1000 parts of double distilled water and 80 parts of chain transfer agent, the composition of chain transfer agent is sodium bisulfite and isopropanol aqueous solution of 1:1.2 into a four-necked reaction flask, and heat while stirring; when the solution in the reaction flask When the temperature rises to 70°C, add 200 parts of styrene, 300 parts of itaconic acid, 400 parts of hydroxyethyl methacrylate and 60 parts of initiator solution within 5 hours, and then keep the reaction for 3 hours; Cool down to room temperature while stirring, neutralize the carboxylic acid in the system with sodium hydroxide solution, the neutralization amount is 75% of the carboxyl moles, and obtain the target dispersant solution.

[0047] By the operation step described in embodiment 1, record above-mentioned dispersant to the suspending rate of calcium carbonate suspension 96.24%, to the suspending rate of aluminum oxide suspension 96.49%, to 43% tebuconazole aqueous suspending agent T...

Embodiment 3

[0049] Add 1000 parts of double distilled water and 20 parts of chain transfer agent, the composition of chain transfer agent is sodium bisulfite and isopropanol aqueous solution of 1:0.8 into a four-necked reaction flask, and heat while stirring; when the solution in the reaction flask When the temperature rises to 80°C, add 200 parts of styrene, 250 parts of hydroxyethyl methacrylate, 450 parts of methacrylic acid and 60 parts of initiator solution within 2 hours, and then keep the reaction for 5 hours; Cool down to room temperature while stirring, neutralize the carboxylic acid in the system with sodium hydroxide solution, the neutralization amount is 85% of the carboxyl moles, and obtain the target dispersant solution.

[0050] By the operation procedure described in embodiment 1, record above-mentioned dispersant to the suspension rate of calcium carbonate suspension 97.37%, to the suspension rate of aluminum oxide suspension 97.22%, to the suspension rate of 43% tebuconaz...

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Abstract

The invention relates to a copolymer dispersant, a carboxylate terpolymer dispersant and a preparation process thereof. The invention consists of the following substances in mass ratio: 10-20 parts of styrene, 30-50 parts of itaconic acid and its derivatives, and 20-30 parts of hydroxyethyl methacrylate. The itaconic acid and its derivatives include itaconic acid and its esters. The hydroxyethyl methacrylates include hydroxypropyl methacrylate, butyl methacrylate and the like. The invention has the advantages that: the carboxylate terpolymer dispersant containing itaconic acid and hydroxyethyl methacrylate units has good water solubility and good adaptability to the pH value of the dispersion system; The agent has an ideal degree of polymerization and carboxyl group, and the dispersed substance is dispersed and stable through steric hindrance effect and electrostatic repulsion, and the viscosity of the system is low; the preparation process is simple, easy to operate, short production cycle, low cost, no environmental pollution, suitable for industrial scale chemical production.

Description

technical field [0001] The invention belongs to the synthesis technology of a novel copolymer dispersant, in particular to a carboxylate terpolymer dispersant and a preparation process thereof. 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. 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. Carboxylate copolymer dispersants can stabilize the system through steric hindrance and electrostatic repulsion, and have better dispersion effects than small molecule dispersants; Compared with dispersants, carboxylate copolymer dispersants are not sensitive to ions, pH and temperature of the dispersion system, and can significantly reduce the viscosity of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/52C08F222/02C08F220/06C08F212/08C08F220/28C09K23/52
Inventor 任天瑞关策张雷张树鹏李新忠
Owner SHANGHAI NORMAL UNIVERSITY