Synthesis method for SML hyperdispersant

A technology of hyperdispersant and synthesis method, which is applied in the treatment of dyed polymer organic compounds, fibrous fillers, etc.

Inactive Publication Date: 2015-03-25
徐丽萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Just take it out

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1: The method used in the present invention is as follows: Step 1, add an emulsifier and a certain amount of lauryl acrylate into a 250mL three-necked flask equipped with a thermometer, a condenser, and a stirrer. Polymerize at 65°C for 33 minutes, raise the temperature to 85°C, slowly add maleic anhydride, styrene and ammonium persulfate initiator through a constant flow pump, and it is estimated that the addition will be completed in 3 hours. After 30 minutes, raise the temperature to 90°C, Until there is no reflux in the condenser, the temperature is lowered to below 40°C. Just take it out.

[0013] Step 2: Add 1 kg of calcium sulfate powder into a high-speed mixer preheated to 140°C, stir at high speed for 5 minutes, then add the synthesized SML hyperdispersant, continue stirring for 15 minutes, and then discharge.

Embodiment 2

[0014] Embodiment 2: The method used in the present invention is as follows: Step 1, add an emulsifier and a certain amount of lauryl acrylate into a 250mL three-necked flask equipped with a thermometer, a condenser, and a stirrer. Polymerize at 70°C for 40 minutes, raise the temperature to 85°C, slowly add maleic anhydride, styrene and ammonium persulfate initiator through a constant flow pump, and it is estimated that the dropwise addition will be completed in 3 hours, and after 30 minutes, raise the temperature to 90°C, Until there is no reflux in the condenser, the temperature is lowered to below 40°C. Just take it out.

[0015] Step 2: Add 1 kg of calcium sulfate powder into a high-speed mixer preheated to 140°C, stir at high speed for 5 minutes, then add the synthesized SML hyperdispersant, continue stirring for 15 minutes, and then discharge.

Embodiment 3

[0016] Embodiment 3: The method used in the present invention is as follows: Step 1, add an emulsifier and a certain amount of lauryl acrylate into a 250mL three-necked flask equipped with a thermometer, a condenser, and a stirrer. Polymerize at 75°C for 44 minutes, raise the temperature to 85°C, slowly add maleic anhydride, styrene and ammonium persulfate initiator through a constant flow pump, and expect to complete the dropwise addition in 3 hours, and raise the temperature to 90°C after 30 minutes, Until there is no reflux in the condenser, the temperature is lowered to below 40°C. Just take it out.

[0017] Step 2: Add 1 kg of calcium sulfate powder into a high-speed mixer preheated to 140°C, stir at high speed for 5 minutes, then add the synthesized SML hyperdispersant, continue stirring for 15 minutes, and then discharge.

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Abstract

Belonging to the technical field of hyperdispersants, the invention specifically relates to a synthesis method for an SML hyperdispersant. The invention provides a system for designing the structure of SML series dispersants, at the same time applies the synthesized hyperdispersant to inorganic powder dispersion and plastic filling systems. The method adopted by the invention comprises the steps of: 1. adding an emulsifier and a certain amount of dodecyl acrylate into a 250mL three-neck flask equipped with a thermometer, a condensing tube and a stirrer, conducting polymerization at 60-80DEG C for 30-44min, raising the temperature to 85DEG C, adding maleic anhydride, styrene and an ammonium persulfate initiator slowly by a constant flow pump totally within a predicted time of 3h, 30min later, raising the temperature to 90DEG C till no reflux in the condensing tube, lowering the temperature to less than 40DEG C, and taking the product out; and 2. adding 1kg of calcium sulfate powder into a high-speed stirring machine heated to 140DEG C in advance, carrying out high speed stirring for 5min, then adding the synthesized SML hyperdispersant, further performing stirring for 15min, and then conducting discharging.

Description

technical field [0001] The invention belongs to the technical field of hyperdispersants, in particular, the invention relates to a synthetic method of SML hyperdispersants. Background technique [0002] A common technical problem inevitably encountered in the application of ultrafine inorganic powders is that the surface activity of ultrafine powders increases as the particle size of the powders decreases. It will cause the powder to agglomerate more easily and seriously affect the application performance of ultrafine powder. Hyperdispersant is a new type of high-efficiency polymer dispersant, which is not sensitive to system temperature, pH value and other factors. Compared with surfactants and traditional polymer dispersants, it has anchor groups that are not easily resolved and solvation chains with stronger steric hindrance. Contents of the invention [0003] The present invention aims at the above problems, and provides a structure design of SML series dispersants, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F222/08C08F212/08C09C1/02C09C3/10
Inventor 徐丽萍鲍飞昂
Owner 徐丽萍
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