High molecular polycarboxylate dispersing agent

A polycarboxylate and dispersant technology, which is applied in biocides, animal repellents, plant growth regulators, etc., can solve the problems of low molecular weight, slow polymerization rate, unsatisfactory dispersion performance and stability, etc., to achieve The effect of high product molecular weight, fast polymerization rate, excellent dispersion performance and stability

Inactive Publication Date: 2019-01-11
南京拓际生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solution polymerization also has the disadvantages of slow polymerization rate and low product molecular weight. When it is formulated into pesticide formulations, its dispersibility and stability are not ideal.

Method used

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  • High molecular polycarboxylate dispersing agent
  • High molecular polycarboxylate dispersing agent
  • High molecular polycarboxylate dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add the emulsifiers tristyrene phenol polyoxyethylene ether and dialkyl polyoxyethylene ether methacrylate to the reaction flask, and the mass ratio is tristyrene phenol polyoxyethylene ether: dialkyl polyoxyethylene ether methacrylic acid Ester=1.2:1, then add 800 parts of deionized water to make the solid content in the system 25%, heat to 120°C, the reaction time is 3 hours; then add 500 parts of itaconic acid and 200 parts of N-oleoyl -N-Methyl taurate sodium and 60 parts of initiator solution, emulsion polymerization reaction occurs at 100°C, and the reaction is kept for 5 hours; 50 parts of sodium bisulfite and 50 parts of n-decyl alcohol are added to the reaction flask, and the mixture is fully stirred Add an appropriate amount of alkali to adjust the pH of the system to 7.2; spray-dry the prepared copolymer solution to obtain a polycarboxylate dispersant.

[0021] Use the polycarboxylate dispersant prepared by the above synthesis to prepare 35% imidacloprid SC for ...

Embodiment 2

[0032] Add the emulsifiers tristyrene phenol polyoxyethylene ether and dialkyl polyoxyethylene ether methacrylate to the reaction flask, and the mass ratio is tristyrene phenol polyoxyethylene ether: dialkyl polyoxyethylene ether methacrylic acid Ester=1.3:1, then add 900 parts of deionized water to make the solid content in the system 20%, heat to 120°C, the reaction time is 3 hours; then add 500 parts of itaconic acid and 200 parts of N-oleoyl -N-Methyl taurate sodium and 60 parts of initiator solution, emulsion polymerization reaction occurs at 100°C, and the reaction is kept for 5 hours; 50 parts of sodium bisulfite and 50 parts of n-decyl alcohol are added to the reaction flask, and the mixture is fully stirred , Adding an appropriate amount of alkali to adjust the pH value of the system to 6.8; spray drying the prepared copolymer solution to obtain a polycarboxylate dispersant.

[0033] According to the test method of Example 1, the dispersant prepared by this formula prepa...

Embodiment 3

[0035] Add the emulsifiers tristyrene phenol polyoxyethylene ether and dialkyl polyoxyethylene ether methacrylate to the reaction flask, and the mass ratio is tristyrene phenol polyoxyethylene ether: dialkyl polyoxyethylene ether methacrylic acid Ester=1.5:1, then add 600 parts of deionized water to make the solid content in the system 29%, heat to 120°C, the reaction time is 3 hours; then add 500 parts of itaconic acid and 200 parts of N-oleoyl -N-Methyl taurate sodium and 60 parts of initiator solution, emulsion polymerization reaction occurs at 100°C, and the reaction is kept for 5 hours; 50 parts of sodium bisulfite and 50 parts of n-decyl alcohol are added to the reaction flask, and fully stirred Add an appropriate amount of alkali to adjust the pH of the system to 6.7; spray-dry the prepared copolymer solution to obtain a polycarboxylate dispersant.

[0036] According to the test method of Example 1, the dispersant prepared by this formula prepared 35% imidacloprid SC has g...

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Abstract

The invention discloses a high molecular polycarboxylate dispersing agent. The high molecular polycarboxylate dispersing agent contains the following raw materials in parts by weight: 100-800 parts ofitaconic acid, 10-100 parts of sodium hydrogen sulfite, 10-100 parts of n-decyl alcohol, 100-800 parts of tristyrene phenol polyoxyethylene ether, 100-500 parts of dialkyl polyoxyethylene ether methacrylate, 100-800 parts of N-oleoyl-N-methyl sodium taurate, 1000 parts of deionized water, 10-100 parts of an initiator and 10-20 parts of alkali; and the relative number average molecular weight of the high molecular polycarboxylate dispersing agent is 8000-50000. The high molecular polycarboxylate dispersing agent is synthesized by virtue of emulsion polymerization reaction, convenient to use, simple in process and suitable for being industrially produced; by virtue of a steric-hinerance effect and an electrostatic repulsion effect, a solution system is relatively stable and has a relativelygood dispersion effect, and the suspension rate of a preparation prepared from a small amount of the dispersing agent is about 96% according to National Committee On Pesticide Analysis.

Description

Technical field [0001] The invention relates to the field of dispersants, in particular to a polymer polycarboxylate dispersant. Background technique [0002] The scientific name of itaconic acid is methylene succinic acid and methylene succinic acid. It is an unsaturated dibasic organic acid. It contains unsaturated double bonds and has active chemical properties. It can be polymerized by itself, and can also be polymerized with other monomers such as acrylonitrile. It is slightly soluble in benzene, chloroform, ether, petroleum ether, carbon disulfide, and soluble in water, Ethanol and acetone; can carry out various addition reactions, esterification reactions and polymerization reactions. They are important raw materials for chemical synthesis industry and also important raw materials for chemical production. Itaconic acid is produced in large quantities by filamentous bacteria, especially Aspergillus decomposing on the surface of plum juice, and is formed by decarboxylation ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F222/02A01N25/04
CPCA01N25/04C08F283/065C08F222/02
Inventor 张琦何华雄朱极卞维鑫
Owner 南京拓际生物科技有限公司
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