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Method for preparing non-ionic hydrophobic association polymerization water-soluble polymer from reverse micro emulsion

A water-soluble polymer and hydrophobic association technology, which is applied in the field of non-ionic hydrophobic association water-soluble polymers and their synthesis, can solve the problems of product molecular chain damage, performance degradation, asymmetric distribution, etc.

Inactive Publication Date: 2009-02-25
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, hydrophobically associated water-soluble polymers are mostly copolymerized with acrylamide and non-ionic hydrophobic units, and there are common problems: the hydrophobic monomers are distributed asymmetrically on the polymer chain, and the dissolution rate in water is slow
Because the hydrophobic association polymer has a strong viscosifying ability in fresh water, the viscosity is very high, resulting in a low solid content of the polymer, and the final product is prepared by drying and pulverizing, the molecular chain of the obtained product is damaged, and the performance Decrease, and the dissolution rate of the dried polymer is even lower, which limits its promotion
In addition, inverse emulsion polymerization can promote the symmetrical distribution of hydrophobic monomers on the polymer chain, but the prepared polymer emulsion is unstable and easy to separate, which affects its use.

Method used

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  • Method for preparing non-ionic hydrophobic association polymerization water-soluble polymer from reverse micro emulsion
  • Method for preparing non-ionic hydrophobic association polymerization water-soluble polymer from reverse micro emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the reaction vessel, add 80g of white oil and 40g of surfactant, control the HLB value of the surfactant mixture between 9.2, control the temperature at 40°C, stir at 800rpm, and stir for 1.5h; mix acrylamide according to the amount (Monomer A), dodecyl dimethyl (acryloxyethyl) ammonium bromide (monomer B) is formulated into an aqueous solution, the solution concentration is between 55 wt% (the molar ratio of A and B is 99:1 ). Then, under the condition of stirring again, the aqueous monomer solution was slowly added dropwise, and the stirring was continued for 5 hours, and the temperature of the solution was controlled between 40°C. Continue to stir, control the stirring speed between 300rpm, pass high-purity nitrogen for 30 minutes, add 0.15g of water-soluble free radical initiator V50, and continue to pass nitrogen for 5 hours to obtain a transparent polymer microlatex with bluish light.

Embodiment 2

[0023] In the reaction vessel, add 80g of white oil and 40g of surfactant, control the HLB value of the surfactant mixture between 9.2, control the temperature at 40°C, stir at 800rpm, and stir for 1.5h; mix acrylamide according to the amount (Monomer A), dodecyl dimethyl (acryloxyethyl) ammonium bromide (monomer B) is formulated into an aqueous solution, the solution concentration is between 55 wt% (the molar ratio of A and B is 99:1 ). Then, under the condition of stirring again, the aqueous monomer solution was slowly added dropwise, and the stirring was continued for 5 hours, and the temperature of the solution was controlled between 40°C. Continue to stir, control the stirring speed between 300rpm, pass high-purity nitrogen for 30 minutes, add 0.70 g of water-soluble free radical initiator V50, and continue to pass nitrogen for 5 hours to obtain transparent polymer microlatex with bluish light.

Embodiment 3

[0025] In the reaction vessel, add 80g of white oil and 40g of surfactant, control the HLB value of the surfactant mixture between 9.2, control the temperature at 40°C, stir at 800rpm, and stir for 1.5h; mix acrylamide according to the amount (Monomer A), dodecyl dimethyl (acryloxyethyl) ammonium bromide (monomer B) is formulated into an aqueous solution, the solution concentration is between 55 wt% (the molar ratio of A and B is 99:1 ). Then, under the condition of stirring again, the aqueous monomer solution was slowly added dropwise, and the stirring was continued for 5 hours, and the temperature of the solution was controlled between 40°C. Continue to stir, control the stirring speed between 300rpm, pass high-purity nitrogen for 30 minutes, add 0.50 g of water-soluble free radical initiator V50, and continue to pass nitrogen for 5 hours to obtain a transparent polymer microlatex with bluish light.

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Abstract

The invention relates to a nonionic hydrophobic association and polymerization water soluble polymer prepared by opposite phase microemulsion and a preparation method thereof, and the polymer is copolymerized by a cation monomer having surface activity and a nonionic monomer. The microemulsion system fat phase is formed by mixing vash oil and spans surface active agent with tweens surface active agent; aqueous phase is the aqueous solution of the cation monomer having surface activity and the nonionic monomer. The micro-rubber latex of the polymer is characterized by very low viscosity which is closes to that of the fat phase, and has obvious tyndall effect; the micro-rubber latex of the polymer can quickly disperse in water, and can be directly used, so as to overcome the defects that the traditional hydrophobic association water soluble polymer has slow dissolution rate and poor solubility property. Therefore, the invention relates to the preparation method of the novel nonionic hydrophobic association polymer prepared by opposite phase microemulsion, and the polymer has the advantages of good water-solubility, viscosity increasing property, salt tackification, and the like, thus the method can be applied to the industries such as petroleum extraction, etc.

Description

technical field [0001] The invention relates to a non-ionic hydrophobic association water-soluble polymer and a synthesis method thereof, belonging to the field of water-soluble polymers. Background technique [0002] In recent years, hydrophobically associating water-soluble polymers have attracted much attention due to their strong viscosity-increasing ability and unique solution properties. Hydrophobically associated water-soluble polymers refer to a new type of functional water-soluble polymers formed by introducing a very small amount of hydrophobic units (usually <2mol%) into the hydrophilic backbone of conventional water-soluble polymers. In aqueous solution, when the concentration of this type of polymer exceeds a certain level, the hydrophobic units on different molecular chains produce an association effect, and the polymer macromolecules form a three-dimensional network structure in the solution, and the viscosity of the solution increases significantly. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F2/32
Inventor 冯玉军鲁红升操卫平陈志
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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