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Epoxy acrylonitrile-butadiene rubber preparation method

A technology of epoxidizing nitrile and epoxidizing reagents, which is applied in the field of polymer materials, can solve the problems of affecting the oil resistance of rubber materials, the degree of epoxidation, and uneven mixing, so as to improve oil resistance and oil resistance Effect

Active Publication Date: 2013-03-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: uneven mixing, the degree of epoxidation will be affected, and the oil resistance of the rubber will be affected

Method used

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  • Epoxy acrylonitrile-butadiene rubber preparation method
  • Epoxy acrylonitrile-butadiene rubber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The polymerization reaction was carried out in a 30L pressure-resistant reactor, and the amount of each monomer added was based on 100 parts of total monomer weight. Before the start of the polymerization reaction, add 310 parts of soft water, 2.0 parts of sodium dodecylbenzene sulfonate, 0.004 parts of Diaobai block, 0.001 parts of EDTA-Fe, 0.001 parts of EDTA-4Na salt, 0.8 parts of t-dodecyl mercaptan and 25 parts. Put the monomer acrylonitrile into the polymerization kettle, vacuum and replace with nitrogen 3 times, then add 75 parts of monomer 1,3-butadiene, 0.04 parts of oxygen scavenger sodium dithionite, and when the polymerization temperature reaches 15℃, add initiator 0.08 parts of dicumyl hydrogen peroxide, polymerization reaction started. During this period, the dry matter content was measured every 3 hours. When the polymerization conversion rate reaches 65%, 0.06 parts of t-dodecanethiol and 6 parts of t-butyl hydroperoxide are added, and the reaction is co...

Embodiment 2

[0029] The polymerization reaction was carried out in a 30L pressure-resistant reactor, and the amount of each monomer added was based on 100 parts of total monomer weight. Before the start of the polymerization reaction, add 370 parts of soft water, 0.006 parts of diaobai block, 0.001 parts of EDTA-Fe, 0.001 parts of EDTA-4Na salt, 3 parts of potassium disproportionated rosinate, 0.7 parts of t-dodecyl mercaptan and 33 parts of monomer monochloride. Acrylonitrile into the polymerization kettle, evacuated and replaced with nitrogen 3 times, then add 67 parts of monomer 1,3-butadiene, 0.09 parts of scavenger sodium dithionite, when the polymerization temperature reaches 15 ℃, add initiator peroxide 0.07 parts of dicumyl hydrogen, polymerization reaction started. When the polymerization conversion rate reaches 65%, 8 parts of peroxyacetic acid and 0.06 parts of t-dodecanethiol are added, and the reaction is continued under vacuum and nitrogen protection. When the polymerization ...

Embodiment 3

[0033] The polymerization reaction was carried out in a 30L pressure-resistant reactor, and the amount of each monomer added was based on 100 parts of total monomer weight. Before the polymerization reaction starts, add 400 parts of soft water, 0.04 parts of diethanolamine, 3 parts of potassium disproportionated rosinate, 0.7 parts of t-dodecanethiol and 30 parts of monomer acrylonitrile to the polymerization kettle, vacuum and replace with nitrogen 3 times, then 70 parts of monomer 2,3-dimethylbutadiene and 0.04 parts of oxygen scavenger N-isopropylhydroxylamine are added, and when the polymerization temperature reaches 30°C, 0.07 parts of initiator potassium persulfate solution is added to start the polymerization reaction. When the polymerization conversion rate reaches 70%, 8 parts of Oxone reagent and 0.05 parts of t-dodecanethiol are added, and the reaction is continued under vacuum and nitrogen protection. When the polymerization conversion rate reaches 85%, add 0.2 part...

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Abstract

The invention provides a method which adopts an epoxidation reagent to modify acrylonitrile-butadiene rubber to prepare an epoxy acrylonitrile-butadiene rubber latex having a better oil resistance, and belongs to the technical field of high-molecular materials. The epoxidation reagent having a wide source and a low price is adopted as a raw material and undergoes an epoxidation reaction with an acrylonitrile-butadiene rubber latex in the invention, so the operation process is simple and convenient, and the epoxy acrylonitrile-butadiene rubber latex having a good oil resistance is prepared.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials and relates to a method for preparing nitrile rubber with good oil resistance. Background technique [0002] At present, there are many kinds of modification of nitrile rubber, mainly divided into physical blending modification and chemical modification. The physical blending modification mainly includes: nitrile rubber-polyvinyl chloride blend rubber and nitrile rubber-EPDM blend rubber, etc. The purpose is to improve the mechanical properties of the colloid, such as excellent oil resistance, weather resistance, Ozone aging resistance and so on. Chemical modification is mainly to introduce a third monomer to participate in the polymerization reaction and introduce groups to improve the original properties of rubber. For example, carboxylated nitrile rubber introduces organic acids. The introduction of carboxyl groups increases polarity and further improves oil resistance. Give rubber high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/06C08F220/44C08F8/08C08F2/26C08F2/38
Inventor 龚光碧王忠超张志强桂强钟启林李晶周雷
Owner PETROCHINA CO LTD