Water-soluble hydrophobic associated copolymer and preparation thereof

A technology of hydrophobic association and copolymer, applied in the field of polymer material synthesis, can solve the problems of incomplete dissolution, cumbersome synthesis process of hydrophobic monomer, difficulty in large-scale industrial production, etc., and achieve the effect of fast dissolution rate

Inactive Publication Date: 2008-06-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After these monomers with long alkyl chains are copolymerized into the polymer, it seriously affects the solubility of the polymer.
The dissolution time of this type of polymer is greatly prolonged, and even the phenomenon of uneven concentration or incompletely dissolved "fish eyes" may appear in the solution
[0007] In summary, although a lot of work has been done on the modification and stabilization of polyacrylamide, and fruitful results have been achieved in many fields, due to the following reasons: (A). Modified hyd

Method used

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  • Water-soluble hydrophobic associated copolymer and preparation thereof
  • Water-soluble hydrophobic associated copolymer and preparation thereof
  • Water-soluble hydrophobic associated copolymer and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Synthesis of embodiment 1 monomer (B)

[0021] Add 20 g of 10-hydroxydecanoic acid, 20 g of triethylamine and 60 g of dichloromethane into a 500 three-necked flask, and then add 100 g of a dichloromethane solution containing 20 g of acryloyl chloride dropwise into the above solution. During the dropwise addition, keep the temperature lower than 20°C. React at room temperature for 20 hours, remove the solid by suction filtration, and then remove methylene chloride under reduced pressure to obtain 19.5 g of monomer (B), with a yield of 80%.

Embodiment 2

[0022] Embodiment 2 Synthesis of water-soluble hydrophobic association copolymer

[0023] Mix 5g of acrylamide, 2.5g of monomer (B) and 100g of water evenly, adjust the pH to 8.5, pass nitrogen gas to remove oxygen for 30 minutes, add 0.008g of ammonium persulfate initiator, and keep the temperature at 50°C for 8 hours to obtain the present invention product. Precipitate with absolute ethanol, cut the precipitate into small pieces with scissors, soak in absolute ethanol for 3 days, and dry under vacuum at 50°C to obtain the polymer.

Embodiment 3

[0024] Embodiment 3 The synthesis of water-soluble hydrophobic association copolymer

[0025] Mix 6g of acrylic acid, 3g of monomer (B) and 50g of water evenly, adjust the pH to 8.5, pass nitrogen gas to remove oxygen for 30 minutes, add 0.008g of ammonium persulfate initiator, and keep the temperature at 50°C for 8 hours to obtain the product of the present invention. Precipitate the product with absolute ethanol, cut the precipitate into small pieces with scissors, soak in absolute ethanol for 3 days, and dry under vacuum at 50°C to obtain the polymer.

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Abstract

The invention discloses a water soluble hydrophobic associating polymer and a preparation method thereof. The water soluble hydrophobic associating polymer obtained through the method of the invention has good water solubility and aqueous medium thickening property, and still has a very good thickening effect under a high temperature and a high shear rate. The polymer molecules take a similar comb-like structure, have a more excellent salt-resistant ability, and can be widely applied in the field of petrochemical industry, and in particualr the polymer molecules can be used as the displacement agent for tertiary oil recovery in the oilfield.

Description

technical field [0001] The invention relates to a water-soluble hydrophobic association copolymer and a preparation method, and belongs to the field of synthesis of polymer materials. Background technique [0002] The increase of the viscosity of the aqueous solution is usually achieved by adding water-soluble polymers to the water. At present, these water-soluble polymers are mainly acrylamide series products, certain biochemical polymers (such as xanthan gum, squash gum, etc.) and their derivatives. ("Oilfield Chemicals" edited by Zheng Xiaoyu and Wu Zhaoliang, Chemical Industry Press, 2001.5). These traditional polymers mainly rely on stretching and physical entanglement of polymer chains to increase viscosity. In order to meet the performance requirements of acrylamide in tertiary oil recovery and water treatment, the molecular weight of acrylamide is also required to be higher and higher, from the usual several million to tens of millions. These high-molecular-weight ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F226/10C08F2/10
Inventor 王丕新杨青波宋春雷谭颖张文德
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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