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Preparation method for salt-tolerant ultra-high molecular weight thickening agent

An ultra-high molecular weight, thickener technology, applied in the chemical industry, which can solve the problems of collapse, weakened thickening effect, and reduced hydrodynamic volume.

Inactive Publication Date: 2014-05-28
杜海兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acrylic polymer thickener is a kind of high-efficiency thickener developed in recent years. Its thickening effect and comprehensive performance are good, but in high-salt environment, the polymer molecular chain will collapse due to salt sensitivity, causing A reduction in hydrodynamic volume and thus less thickening effect

Method used

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  • Preparation method for salt-tolerant ultra-high molecular weight thickening agent
  • Preparation method for salt-tolerant ultra-high molecular weight thickening agent

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1 Preparation of salt-tolerant ultra-high molecular weight thickener

[0021] Dissolve 2-methyl-2-acrylamidopropanesulfonic acid and acrylamide in water at a mass ratio of 1:1:4, then under ice bath conditions, control the system temperature at 5°C, and slowly add it dropwise while stirring Ammonia solution to control the pH value of the system at 6.5; then mix the emulsifier Span-80 and kerosene at a ratio of 1:4 and stir. After the Span-80 is completely dissolved in the kerosene, slowly add the mass ratio of the kerosene 1:1 octadecyl acrylate, stir to dissolve; add the kerosene solution to the neutralized aqueous solution, emulsify at room temperature and at a stirring speed of 1200 rpm for 40 minutes, then add the mass of kerosene Ammonium persulfate with a ratio of 1: 140 was heated up to 60°C and reacted for 2 hours under the protection of nitrogen. Finally, Tween-80 with a mass ratio of 1:1 to kerosene was added and reverse emulsified for 50 minutes. Sal...

Embodiment 2

[0023] The salt tolerance performance measurement of embodiment 2 thickener

[0024] The salt-resistant ultra-high molecular weight thickener obtained in Example 1 is applied to sodium sulfate decahydrate (Na 2 SO 4 . 10H 2 O) 0-20% phase change material system. Weigh 1 gram of salt-resistant ultra-high molecular weight thickener, slowly add it to 100 ml of water, and stir at room temperature for 2 hours at a stirring speed of 1500 rpm, then seal it and put it in a water bath at 50°C Heat to swell for 2 hours, and finally cool to 25°C. The prepared solution was mixed at a shear rate of 1 s -1 Under the condition of , use Anton Paar MCR501 rotational rheometer to measure its viscosity value. Then, add 2%, 5%, 10% and 20% sodium sulfate decahydrate into the solution respectively, and continue to measure the corresponding viscosity value. figure 2 The measured solution viscosity varies with the salt concentration curve, the viscosity of the thickener is less affected ...

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Abstract

The invention relates to a preparation method for a salt-tolerant ultra-high molecular weight thickening agent. The preparation method comprises the following steps: placing a certain amount of 2-methyl-2-acrylamido propane sulfonic acid and acrylamide into a reaction vessel, and using ammonia water or sodium hydroxide to adjust the pH value to 6.5-7.0; adding a kerosene solution in which Span-80 and a hydrophobic monomer are dissolved, adding an initiator after emulsification, introducing nitrogen, heating for reaction, and adding Tween-80 for invert-emulsion to obtain the salt-tolerant ultra-high molecular weight thickening agent. According to the agent, the octadecyl acrylate hydrophobic monomer is used as a functional monomer for improving the salt tolerance of the thickening agent, the preparation method is simple, and the industrialized production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a salt-tolerant thickener. The thickener is an ultra-high molecular weight acrylamide terpolymer and belongs to the technical field of chemical industry. [0002] Background technique [0003] Polymer thickener refers to a new type of functional polymer material used to increase the viscosity or consistency of the product. It has the characteristics of small dosage, obvious thickening, and convenient use. It is widely used in medicine, printing and dyeing, cosmetics, and food additives. , energy and chemical industries. Acrylic polymer thickener is a kind of high-efficiency thickener developed in recent years. Its thickening effect and comprehensive performance are good, but in high-salt environment, the polymer molecular chain will collapse due to salt sensitivity, causing The reduction in hydrodynamic volume reduces the thickening effect. [0004] If 2-methyl-2-acrylamidopropanesulfonic acid and acr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/56C08F220/58C08F2/30
Inventor 不公告发明人
Owner 杜海兵
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