Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Copolymer having dithio structure-containing annular groups, its preparation method and application

A technology of cyclic groups and copolymers, which is applied to copolymers with cyclic groups containing disulfide structures and its preparation and application fields, which can solve the problem of uneven grafting and the inability to achieve effective chemical grafting stabilizers. methods, low grafting efficiency, etc., to achieve the effects of expanding dynamic volume, improving salt resistance and hydrophilic performance, and increasing viscosity

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the stabilizer is also a polymerization inhibitor at the same time, it cannot be used as a monomer to participate in the polymerization of HPAM, but can only be reacted with macromolecules after the completion of HPAM polymerization, and the post-grafting stabilizer group
However, due to the high viscosity of HPAM, the grafting of the stabilizer only exists on the surface of the HPAM colloidal particles, resulting in low grafting efficiency and uneven grafting.
Therefore, there is no effective means to realize the chemical grafting stabilizer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Copolymer having dithio structure-containing annular groups, its preparation method and application
  • Copolymer having dithio structure-containing annular groups, its preparation method and application
  • Copolymer having dithio structure-containing annular groups, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] According to the present invention, the preparation method of the polymer having a cyclic group containing disulfide structure comprises: in the presence of an initiator, the compound shown in formula (5) and the compound shown in formula (6) are carried out aqueous solution polymerization,

[0036]

[0037] In formula (5), W is as defined above in the present invention, in formula (6), R 1 , R 2 , A and X are as defined above in the present invention.

[0038]According to the method of the present invention, wherein, the weight ratio of water, the compound shown in the formula (5), the compound shown in the formula (6) and the initiator can be 1000: (80-450): (20-50): ( 1-3), preferably, the weight ratio of water, the compound shown in the formula (5), the compound shown in the formula (6) and the initiator can be 1000: (100-260): (20-40): (1-3).

[0039] According to the method provided by the present invention, the initiator can be selected from various conven...

preparation Embodiment 1

[0063] This example is used to illustrate the compound with a cyclic group containing a disulfide structure provided by the present invention and its preparation method.

[0064] In a three-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, add 1 part of thioctylamine (scientific name: 6,8-dithioctylamine), 10 parts of solvent toluene and 0.01 part of polymerization inhibitor agent hydroquinone, heated to 60°C to dissolve it completely, and then added 2 parts of methacrylic acid and 0.1 part of concentrated sulfuric acid (98% by mass concentration) in sequence. First heat and reflux for about 3 hours, and then install a water separator for azeotropic dehydration. After separating 0.7 parts of water, the temperature in the three-necked flask was maintained at 120°C. When it was observed that the desorption amount was equivalent to the theoretical value (1 part of water), the reaction was stopped, the temperature was lowered to room temperature, and un...

preparation Embodiment 2

[0068] This example is used to illustrate the compound with a cyclic group containing a disulfide structure provided by the present invention and its preparation method.

[0069] In a three-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, based on the amount of the substance, after adding 0.01 part of the polymerization inhibitor hydroquinone, add 1 part of thioctyl alcohol (scientific name: 6,8-dithioctyl alcohol) in sequence. Octanol), 1.2 parts of triethylamine, 10 parts of toluene solvent, warm up to 50°C, then add 2 parts of methacryloyl chloride into the dropping funnel (the molar ratio of the three is 1:1.2:2, methacryloyl chloride Excess), add dropwise for about 1 hour, and keep warm at 50°C for 8 hours after the dropwise addition is completed. After the reaction, filter the salt generated by the reaction, distill under reduced pressure, remove the solvent and excess acid chloride, then pour the product into a beaker, wash off hydroquinone a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a copolymer having dithio structure-containing annular groups. The copolymer comprises a building block represented by formula (1) and a building block represented by formula (2), wherein, in formula (1), W represents one selected from -CONH2, -COOH and -CON(CH3)2; and in formula (2), R1 represents any one selected from H and C1-C10 alkyl, R2 represents any one selected from C1-C10 alkylene, A represents -O- or -NH-; and X represents dithio structure-containing annular groups of formula (3), in formula (3), R3 and R4 are any one respectively selected from H and C1-C3 alkyl, n represents an integer in the range of 3-10, and the intrinsic viscosity of the copolymer is 1500-3500. The copolymer has excellent salt resistance.

Description

technical field [0001] The invention relates to a copolymer with a cyclic group containing disulfide structure, its preparation method and application. Background technique [0002] Polyacrylamide (HPAM) is currently the main chemical agent used for tertiary oil recovery in oilfields. It has a good oil displacement effect on type I oil reservoirs with low temperature and can greatly improve oil recovery. However, the use of HPAM is greatly affected by the temperature of the working environment. For deeply buried Type II and Type III oil reservoirs, due to the high temperature and the presence of active impurities, a trace amount of oxygen will also cause serious oxidative degradation of the polymer, resulting in solution The viscosity of the product drops sharply, loses its viscosity and polymer properties, and loses its use value. This is a very prominent problem in the practical application of type II and type III oil reservoirs. [0003] There are few antioxidant stabil...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/54C08F220/06C08F220/34C08F220/38C09K8/588
Inventor 祝纶宇魏小林计文希林蔚然赵方园伊卓刘晓光刘希杜凯
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com