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Novel modified polyether type dispersing agent and preparation method thereof

A polyether and dispersant technology, applied in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve the problem that the hydrophilic group does not play a good role, the performance of the dispersant does not achieve the desired effect, and has not been widely used To achieve the effect of improving stability and compatibility, strong environmental adaptability and wide applicability

Inactive Publication Date: 2016-12-14
上海优创化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it has not been widely used all the time, and the hydrophilic group on its main chain does not play a good role, so that the performance of this dispersant does not achieve the desired effect

Method used

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  • Novel modified polyether type dispersing agent and preparation method thereof
  • Novel modified polyether type dispersing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment relates to a preparation method of a novel modified polyether dispersant, which consists of the following steps:

[0032] (1) Add appropriate amount of maleic anhydride and solvent in a multi-port reactor equipped with agitator, dropping funnel, thermometer and reflux condenser, at a temperature of 50°C, so that maleic anhydride can be completely dissolved in the solvent, and then Add 1 / 3 of the volume of the total initiator (AIBN solution, azobisisobutyronitrile solution) into the above system, the mass ratio of maleic anhydride to the total initiator is 0.5%, heat and stir and then raise the temperature to 80°C;

[0033] (2) Mix an appropriate amount of styrene, methacrylic acid and solvent evenly at room temperature, place it in the dropping funnel and slowly drop it into the system of the above step (1), and keep stirring, and the dropping time is controlled at 3h At the same time, an appropriate amount of chain transfer agent alkyl mercaptan, initia...

Embodiment 2

[0039] This embodiment relates to a preparation method of a novel modified polyether dispersant, which consists of the following steps:

[0040] (1) Add an appropriate amount of maleic anhydride and solvent into a three-necked flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, at a temperature of 55°C, so that the maleic anhydride can be completely dissolved in the solvent, and then the total trigger 1 / 4 of the volume of the agent (AIBN solution) was added to the above system, the mass ratio of maleic anhydride to the total initiator was 1.0%, and then the temperature was raised to 82°C;

[0041] (2) Mix an appropriate amount of styrene, acrylic acid monomer, and solvent evenly at room temperature, place it in the dropping funnel and slowly drop it into the system of the above step (1), and keep stirring, and the dropping time is controlled at 2h At the same time, an appropriate amount of chain transfer agent alkyl mercaptan, initiator AIBN, and ...

Embodiment 3

[0047] This embodiment relates to a preparation method of a novel modified polyether dispersant, which consists of the following steps:

[0048](1) Add an appropriate amount of maleic anhydride and solvent in a three-necked flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, at a temperature of 60°C, so that the maleic anhydride can be completely dissolved in the solvent, and then add the total initiator (AIBN solution) 1 / 3 of the volume was added to the above system, the mass ratio of maleic anhydride to the total initiator was 1.3%, and then the temperature was raised to 78°C;

[0049] (2) Mix an appropriate amount of styrene, methacrylic acid, crotonic acid, and solvent evenly at room temperature, place it in the dropping funnel and slowly drop it into the system of the above step (1), and keep stirring, dropwise The time is controlled at 3 hours, and at the same time, an appropriate amount of chain transfer agent alkyl mercaptan, AIBN and solv...

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Abstract

The invention discloses a novel modified polyether type dispersing agent and a preparation method thereof. According to the method provided by the invention, an acrylic acid-maleic anhydride-styrol copolymer and polyether containing a functional group have copolymerization under the effect of a catalyst, in the structure, the functional group is used for introducing a block polyether, the obtained modified polyether type dispersing agent not only contains a plurality of carboxylic groups, but also contains aromatic rings [but not belonging to APEO (alkylphenol ethoxylates)] and an amphipathic EO / PO block structure, the stability and the compatibility of a pigment filler can be improved greatly, and adjustment on molecular weight and molecular structure can be performed according to requirements. The preparation method provided by the invention has the advantages that the process is simple, the reaction is mild, and the application is wide.

Description

technical field [0001] The invention belongs to the field of polymer dispersants, and in particular relates to a novel modified polyether dispersant and a preparation method thereof. Background technique [0002] As a kind of surfactant, dispersant can evenly distribute particles in the system, which increases the stability of the system and anti-sedimentation performance. There are many kinds of dispersants, which can generally be divided into anionic, cationic, nonionic and non-ionic model. However, common dispersants on the market have their own insurmountable defects, such as weak adsorption capacity, easy detachment from the material surface, short group chain length, poor stability, etc. Therefore, it is of great significance to research and develop new polymer dispersants. [0003] At present, the research on maleic anhydride, styrene copolymer, maleic anhydride and acrylic acid copolymer has been very extensive, especially in recent years, the water reducer containi...

Claims

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Application Information

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IPC IPC(8): C08F299/02C08F2/38C08F212/08C08F220/06C08F222/06B01F17/52C09K23/52
CPCC08F2/38C08F212/08C08F299/022C09K23/00
Inventor 李恩裘建庆
Owner 上海优创化学品有限公司
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