Method for synthesizing electrolyte-resistant thickener by using inverse emulsion

An electrolyte-resistant and inverse emulsion technology, which is applied in the field of synthesizing electrolyte-resistant thickeners, can solve the problems of poor electrolyte resistance and unsatisfactory thickening effect, and achieves the advantages of strong electrolyte resistance, good thickening effect and simple process. Effect

Inactive Publication Date: 2009-12-30
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for synthesizing an electrolyte-resistant thickener by inverse emulsion in order to overcome the unsatisfactory thickening effect of the existing thickener and the poor electrolyte resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Water phase: 80g of acrylic acid, 100g of 26% NaOH aqueous solution, 12g of acrylamide, 0.15g of N,N'-methylenebisacrylamide, and 4.5g of deionized water.

[0024] Oil phase: 120 g of kerosene, span-80: 12 g, vinyl alkyl ether (n=18): 5 g.

[0025] Initiator: ammonium persulfate: 0.12g, sodium bisulfite: 0.24g

[0026] The water phase prepared according to the above ratio was added to the oil phase, emulsified for 15 minutes, the initiator was added, and the emulsion was transferred to a four-neck flask. The temperature was raised to 55°C to initiate polymerization. Reaction 4h. The product can be obtained by adding 14gTX-10.

[0027] Test performance: 6% white pulp viscosity: 106000mpa.s, viscosity index is 12%, viscosity retention rate is 24.2%, total grams of 6% white pulp plus salt is 46g.

Embodiment 2

[0029] Water phase: methacrylic acid 80g, 30% NaOH aqueous solution 100g, acrylamide 13g, N,N'-methylenebisacrylamide: 0.18g, deionized water: 4.5g.

[0030] Oil phase: 60 g of liquid paraffin, 60 g of xylene, span-60: 12 g, vinyl alkyl ether (n=18): 4 g.

[0031] Initiator: ammonium persulfate: 0.12g, sodium bisulfite: 0.24g

[0032] The water phase prepared according to the above ratio was added to the oil phase, emulsified for 15 minutes, the initiator was added, and the emulsion was transferred to a four-neck flask. The temperature was raised to 60°C to initiate polymerization. Reaction 4h. The product can be obtained by adding 10g AEO-20.

[0033] Test performance: 6% white pulp viscosity: 96500mpa.s, viscosity index is 32.2%, viscosity retention rate is 35.8%, total grams of 6% white pulp plus salt is 53g.

Embodiment 3

[0035] Water phase: 80g of acrylic acid, 100g of 27% NaOH aqueous solution, 12g of acrylamide, 0.15g of N,N'-methylenebisacrylamide, and 4.5g of deionized water.

[0036] Oil phase: 120 g of kerosene, span-80: 13 g, vinyl alkyl ether (n=18): 2 g.

[0037] Initiator: ammonium persulfate: 0.12g, sodium bisulfite: 0.24g

[0038] The water phase prepared according to the above ratio was added to the oil phase, emulsified for 15 minutes, the initiator was added, and the emulsion was transferred to a four-neck flask. The temperature was raised to 70°C to initiate polymerization. Reaction 5h. The product can be obtained by adding 14g AEO-15.

[0039] Test performance: 6% white pulp viscosity: 88700mpa.s, viscosity index is 15%, viscosity retention rate is 45.3%, the total grams of 6% white pulp plus salt is 82g.

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Abstract

The invention relates to a method for synthesizing an electrolyte-resistant thickener by using an inverse emulsion. The method comprises the following steps: adding water-soluble monomer acrylamide and a cross-linking agent to neutral water-soluble unsaturated carboxylic acid to form an aqueous phase; adding a hydrophobic functional monomer and an emulsifier to the solvent to form an oil phase; mixing and emulsifying the aqueous phase and the oil phase to form a water-in-oil emulsion, adding an initiator, heating the mixture to initiate polymerization, decompressing and distilling the mixture, and adding a phase transfer agent to obtain the product. The novel thickener synthesized by the method has good thickening effect with 3 percent of white pulp viscosity up to 106000mp.s, strong electrolyte-resistant ability with viscosity retention rate up to 45.3 percent, and simple process with stable and easily controlled reaction process.

Description

Technical field: [0001] The invention relates to a method for synthesizing an electrolyte-resistant thickener, in particular to a method for reverse-phase thickening with water-soluble unsaturated carboxylic acid, acrylamide, cross-linking agent, water, and hydrophobic monomers containing long carbon chains as main raw materials. Method for emulsion synthesis resistant to electrolyte thickeners. Background technique: [0002] Anionic polyacrylic acid thickeners have been widely used in textile printing paste, paint, petroleum industry, water treatment and other fields. The main synthesis methods are traditional emulsion polymerization, soap-free polymerization and inverse emulsion polymerization. Among them, the traditional emulsion polymerization and soap-free polymerization products have the disadvantages of low solid content and poor thickening effect. In addition, due to the same ion effect, the anti-electrolyte ability of this kind of thickener is also poor. Accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F216/18C08F2/32
Inventor 陈洪龄宋子云
Owner NANJING UNIV OF TECH
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