Brominated hydrogenated nitrile rubber as well as preparation method and application thereof

A technology of hydrobrominated nitrile and nitrile rubber, which is applied in the field of rubber, can solve the problems of poor low temperature resistance and poor flexibility of molecular chains, and achieve the effects of improving low temperature resistance, increasing production efficiency, and reducing production costs

Active Publication Date: 2021-09-21
BEIJING UNIV OF CHEM TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For hydrogenated nitrile rubber, the higher the nitrile group content, the better the oil resistance, but the poorer the flexibility of the molecular chain, resulting

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
  • Brominated hydrogenated nitrile rubber as well as preparation method and application thereof
  • Brominated hydrogenated nitrile rubber as well as preparation method and application thereof
  • Brominated hydrogenated nitrile rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Example 1

[0043] The present embodiment provides a kind of preparation method of hydrobromated nitrile rubber, and the steps are as follows:

[0044] Epoxidation reaction: Dissolve 1mol nitrile rubber in organic solvent chlorobenzene to make a solution with a mass fraction of 8%, add 0.2mol acetic acid and 0.4mol hydrogen peroxide, and perform epoxidation reaction at 60°C for 6h, and use the obtained product Dry after ethanol precipitation, obtain the epoxidized nitrile rubber precursor (abbreviation ENBR) that degree of epoxidation is 20%;

[0045] Hydrogenation reaction: dissolve it in chlorobenzene to make 3% ENBR glue, carry out hydrogenation reaction in the reaction kettle through high temperature, high pressure and catalysis, and obtain the epoxidized hydrogenated nitrile rubber precursor with a hydrogenation degree of about 95% (referred to as HENBR).

[0046] Wherein, the catalyst is Wilkinson catalyst and ligand triphenylphosphine.

[0047] The conditions ...

Example Embodiment

[0050] Example 2

[0051] This embodiment provides a preparation method of hydrogen brominated nitrile rubber, the difference from the preparation method of Example 1 is that the ring-opening reagent is replaced by bromobutyric acid (bromobutyric acid-HENBR for short).

Example Embodiment

[0052] Example 3

[0053] This embodiment provides a preparation method of hydrogen brominated nitrile rubber, the difference from the preparation method of Example 1 is only that the ring-opening reagent is replaced with bromohexanoic acid (bromohexanoic acid-HENBR for short).

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 relates to the technical field of rubber, in particular to brominated hydrogenated nitrile rubber as well as a preparation method and application thereof. The brominated hydrogenated nitrile rubber disclosed by the invention comprises a bromine-containing branched chain; a Fourier infrared spectrogram of the brominated hydrogenated nitrile rubber has the following characteristic peaks: -OH vibration peak at 3467 cm<-1 >, a C=O vibration peak at 1735 cm<-1>, and a C-Br vibration peak at 1281 cm<-1>. Researches find that a bromine-containing branched chain with a flexible characteristic is introduced into a molecular chain of the hydrogenated nitrile rubber, so that the glass-transition temperature of the hydrogenated nitrile rubber can be reduced on the premise of not losing good mechanical properties and oil resistance of the hydrogenated nitrile rubber, and the low-temperature resistance of the hydrogenated nitrile rubber is further improved; meanwhile, due to introduction of the bromine element, the vulcanization time of the hydrogenated nitrile rubber is shortened, and the production efficiency is greatly improved. In addition, bromine atoms are introduced into a molecular chain of the brominated hydrogenated nitrile rubber to serve as active reaction groups, and a new direction is provided for further modification research of the brominated hydrogenated nitrile rubber.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a hydrobrominated nitrile rubber and a preparation method and application thereof. Background technique [0002] Hydrogenated nitrile rubber (HNBR) is a product obtained by hydrogenating the carbon-carbon double bonds on the molecular chain of nitrile rubber. Hydrogenated nitrile rubber has good oil resistance due to its nitrile group; and because of its highly saturated structure, it has good heat resistance, chemical corrosion resistance and excellent ozone resistance; at the same time, hydrogenated nitrile rubber also has High strength, high tear performance, etc., is one of the rubbers with excellent comprehensive properties, widely used in the automotive industry and oil field operations. [0003] In the rubber processing process, vulcanization is the last process. After vulcanization, rubber products with practical value can be obtained. The vulcanization time o...

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
IPC IPC(8): C08C19/12C08C19/06C08C19/02C08L15/02
CPCC08C19/12C08C19/06C08C19/02C08L15/02Y02P20/584
Inventor 岳冬梅王欢毛立新张立群
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap