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Polyacrylamide microsphere

A technology of polyacrylamide and acrylamide, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of increasing production costs and the environment, and achieve the effects of good fluidity, simple preparation methods, and enhanced recovery

Active Publication Date: 2014-07-09
传化智联股份有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, these chemical methods inevitably use a large amount of emulsifiers and organic solvents in the preparation process, which not only increases the production cost, but also brings huge pressure on the environment.

Method used

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  • Polyacrylamide microsphere
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Embodiment 1-2

[0024] Embodiment 1-2 is the synthesis of stabilizer

Embodiment 1

[0026] The synthesis process of the cationic stabilizer is as follows: prepare 20wt% cationic monomer acryloyloxyethyltrimethylammonium chloride (DAC) aqueous solution in 300g of water, heat up to 45°C, and add 5g of 1.0% V044 aqueous solution after passing nitrogen for 0.5h , After 12 hours of reaction, the reaction was stopped to obtain a polymer, which was determined by gel permeation chromatography (GPC), and its molecular weight was 200,000. The molecular weight can be controlled at 5,000-500,000 by using different initiator concentrations, polymerization temperatures, and monomer concentrations.

Embodiment 2

[0028] The synthesis process of the anionic stabilizer is as follows: prepare 300 g of an aqueous solution of 20wt% anionic monomer 2-acrylamide-2-methylpropanesulfonate (AMPSNa), raise the temperature to 45°C, and add 5g of 1.0% V044 after passing nitrogen for 0.5h Aqueous solution, after 12 hours of reaction, the reaction was stopped to obtain a polymer, which was determined by gel permeation chromatography (GPC), and its molecular weight was 90,000. The molecular weight can be controlled at 5,000-500,000 by using different initiator concentrations, polymerization temperatures, and monomer concentrations.

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Abstract

The invention discloses a polyacrylamide microsphere. For multiple chemical methods for preparing the polyacrylamide microsphere at present, the preparation processes use a great amount of emulsifying agents and organic solvents inevitably so as to cause increase of the production cost and simultaneously cause large pressure to the environment. The invention utilizes a water-in-water polymerization technology to prepare the polyacrylamide microsphere, modified clay is used as a cross-linking agent, inorganic saline solution is used as a dispersing medium, linear polymer is used as a stabilizer, acrylamide is used as a basic monomer, and an initiator is added to initiate polymeric preparation of the polyacrylamide microsphere. According to the polyacrylamide microsphere, the preparation process is simple, the cost is low, no organic solvent or emulsifying agent is used, and the polymer microsphere system with uniform particle size and high solid content can be obtained.

Description

technical field [0001] The invention relates to polyacrylamide, in particular to nonionic, cationic and anionic polyacrylamide microspheres prepared by water-in-water polymerization technology. technical background [0002] Polyacrylamide and its derivatives are a class of widely used water-soluble polymer materials, which can be used as flocculants, paper strengthening agents, retention and drainage aids, etc., and have been used in water treatment, papermaking and oil exploration and other fields. Cross-linked polyacrylamide microspheres can be used as materials such as soil water retention agent, oil field water blocking agent and "diaper" due to their properties of water absorption, water retention and swelling. At present, polymer microspheres are mainly obtained by physical methods and chemical methods. Chemical methods mainly include: dispersion polymerization, seed polymerization, suspension polymerization, emulsion polymerization, etc. However, at present, these ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/56C08F220/56C08F220/34C08F226/02C08F220/58C08K9/02C08K3/34C09K8/42C09K8/588
Inventor 姜永梅张高奇
Owner 传化智联股份有限公司
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