High-temperature-resistant salt-resistant polymer as well as preparation method and application thereof

A technology of polymer and high temperature resistance, applied in the field of its preparation, high temperature and salt resistance type polymer, can solve the problems of loss of viscosity increase and viscosity reduction of polymer solution, and achieve good temperature and salt resistance and strong polymerization ability , the effect of less oxygen interference

Active Publication Date: 2021-06-18
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a monomer additive, alkyl-like substituted acrylamide can effectively improve the high temperature resistance of polymers. However, due to the flexible molecular chain segment of alkyl-like substituted acrylamide, it is mor

Method used

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preparation example Construction

[0034] The invention provides a method for preparing a high temperature and salt resistant polymer, comprising the following steps:

[0035] Step 1. Mix 10-20 parts of high-efficiency temperature-resistant and salt-resistant monomer, 100-150 parts of acrylamide, 5-10 parts of sodium acrylate, 100-120 parts of sodium 2-acrylamide-2-methylpropanesulfonate, photoinitiated Add 0.3-0.5 parts of agent, 0.08-0.1 part of thermal initiator, 0.02-0.05 part of polymer branching agent, 4-6 parts of polymer stabilizer, and 4-6 parts of nanocellulose into the reactor and stir to dissolve;

[0036] Step 2. Open the nitrogen valve to fill with nitrogen and remove oxygen for 20-30 minutes, and at the same time open the cooling brine to cool down. Stir slowly until dissolved and dispersed evenly;

[0037] Step 3. When the temperature of the material in the reaction kettle drops to 5-6°C, stop stirring, turn on the polymerization lamp, light polymerization for 1-2 hours, and put the rubber bloc...

Embodiment 1

[0056] 16.5 parts of high-efficiency temperature-resistant and salt-resistant monomers (including 8 parts of N'N-dimethylacrylamide monomers; 8.5 parts of N-vinylpyrrolidone monomers), 160 parts of acrylamide, 2-acrylamide-2- 110 parts of sodium methyl propane sulfonate, 8 parts of sodium acrylate, 5 parts of highly methyl etherified melamine resin, 0.03 parts of polymer branching agent N'N-methylenebisacrylamide, 5 parts of nanocellulose, photoinitiated A total of 0.4 parts of 2,2'-azobisisobutylamidine dihydrochloride and 2,2'-azo[2-(2-imidazolin-2-yl)propane]dihydrochloride and thermal initiation A total of 0.09 parts of ammonium persulfate and benzoyl peroxide were added to the reaction kettle, and stirring was started to dissolve and disperse evenly. Open the cooling brine to cool down, and at the same time fill the reactor with nitrogen for 30 minutes, when the temperature of the reactor drops to 6°C, stop stirring, adjust the nitrogen pipe to the liquid level and fill i...

Embodiment 2

[0058] Respectively, 18 parts of high-efficiency temperature-resistant and salt-resistant monomers (9 parts of N'N-dimethylacrylamide monomers; 9 parts of N-vinylpyrrolidone monomers), 150 parts of acrylamide, 2-acrylamide-2- 120 parts of sodium methyl propane sulfonate, 6 parts of methyl etherified high imino melamine resin, 0.04 parts of polymer branching agent N'N-methylenebisacrylamide, 4 parts of nanocellulose, 4 parts of photoinitiator, A total of 0.3 parts of 4'-azobis(4-cyanovaleric acid) and azobisisopropylimidazoline hydrochloride and a total of 0.08 parts of thermal initiator potassium persulfate and ammonium persulfate were added to the reactor, and the stirring was started Dissolve and disperse evenly. Turn on the cooling brine to cool down, and at the same time fill the reactor with nitrogen for 30 minutes, when the temperature of the reactor drops to 5°C, stop stirring, adjust the nitrogen pipe to the liquid level and fill it with nitrogen at a flow rate of 0.8 / ...

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Abstract

The invention discloses a high-temperature-resistant salt-resistant polymer as well as a preparation method and application thereof, and belongs to the field of preparation of high-molecular polymers. An aqueous solution free radical polymerization and photo-initiation system is adopted, copolymerization with acrylamide, sodium acrylate and 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt is carried out in an aqueous solution, and meanwhile, a polymer stabilizer, a polymer branching agent and a nanocellulose cosolvent are added; and after polymerization, granulating and drying are performed to obtain a high-temperature-resistant and high-salt-resistant anionic polyacrylamide filtrate reducer. The high-temperature-resistant and high-salt-resistant polymer filtrate reducer prepared by the invention has the characteristics of efficient tackifying property, better temperature resistance and salt resistance, and good water solubility and stability including shear stability, chemical stability, thermal stability, salt stability, biological stability and long-acting stability.

Description

technical field [0001] The invention belongs to the field of high molecular polymer preparation, in particular to a high temperature and salt resistant polymer, its preparation method and application. Background technique [0002] Commonly used heat-resistant and salt-resistant polymer fluid loss additives are mainly anionic polyacrylamide (APAM) and its derivatives. APAM has strong hydrophilicity, is easy to form hydrogen bonds with water, and is easy to dissolve in water. After hydration, it has a large hydrodynamic volume, which plays a role in increasing viscosity. Electrical repulsion occurs between molecular chains, so that the molecular chains are stretched. Larger hydrodynamic volumes can be obtained. However, because the molecular chain is a flexible chain, it shows a random coil conformation in aqueous solution. In high-temperature, high-salinity brine, the molecular chain curls up, and the viscosity drops significantly, so that the polymer solution viscosities ar...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F251/02C08F220/56C08F220/58C08F220/06C08F220/54C08F226/10C08F222/38C09K8/035
CPCC08F283/002C08F251/02C09K8/035
Inventor 杨开吉马勇王勤吴江勇魏星光
Owner JIANGSU FEYMER TECH
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