Low rigidity, low compression permanent deformation cold tolerant butadiene nitrile rubber compositions

A nitrile rubber, permanent deformation technology, applied in the field of nitrile rubber composition, can solve the problems of unstable physical and mechanical properties, poor compression permanent deformation of rubber, uneven dispersion of rubber fillers, etc., and achieve low compression permanent deformation and cold resistance Improvement and compression permanent deformation are small and the effect of fatigue is good

Active Publication Date: 2009-01-07
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
View PDF0 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Provided by Wu Zhiqiang et al. (“Research on Cold-resistant and Oil-resistant NBR Rubber Compound Formulation”, Institute of Metal and Chemistry, China Academy of Railway Sciences, Wu Zhiqiang et al., “Rubber Industry”, Vol. 53, No. 5, pp. 290-293, 2006) The amount of plasticizer used in the method is as high as 45 parts, the formula has poor processability, the properties of the rubber are unstable and the compression set is also large (36%)
[0004] These existing methods all have the following disadvantages: because these methods are filled with a large amount of plasticizers in order to improve low-temperature performance, resulting in poor processability, it is also easy to cause uneven dispersion of fillers in rubber and unstable physical and mechanical properties; in addition, currently The compression set of the rubber prepared by the method is relatively poor, all greater than 30%

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: 100 parts of NBR (raw rubber), after being plasticized by Botong, 2 parts of anti-aging agent RD, 60 parts of N330 carbon black were added in turn, after mixing evenly, plasticizer adipic acid bis(butoxyethoxy) was added 30 parts of ethyl) ester, finally add 1.0 part of DCP, 1.0 part of PK900, mix well and then park for 1-3 days, vulcanize and test.

[0022] Sample vulcanization conditions: 170°C*12min.

[0023] Performance test results:

[0024] Hardness 48; tensile strength 12.5MPa; elongation 565%; compression set 14.5% (100℃*24h, compression 30%); -50℃ compression cold resistance coefficient 0.33; brittleness temperature <-60℃; flex cracking The number of pinholes is more than 1 million times.

Embodiment 2

[0025] Embodiment 2: 100 parts of NBR (raw rubber), after plasticizing by Botong, add 22462 parts of anti-aging agent, 0.5 part of 4010NA, 60 parts of N330 carbon black, add plasticizer adipic acid di(butoxy 35 parts of ethyl ethoxyethyl) ester, finally add 1.8 parts of DCP, 0.5 parts of PK 900, mix well and park for 1-3 days, vulcanize and test.

[0026] Sample vulcanization conditions: 170°C*12min.

[0027] Performance test results:

[0028] Hardness 50; tensile strength 12.1MPa; elongation 515%; compression set 12.3% (100℃*24h, compression 30%); -50℃ compression cold resistance coefficient 0.35; brittleness temperature <-60℃; flex cracking The number of pinholes is more than 1 million times.

Embodiment 3

[0029] Example 3: 100 parts of NBR (raw rubber), after plasticizing by Botong, add 1 part of anti-aging agent MB, 1.0 part of 4010NA, 25 parts of N375 carbon black, 25 parts of N-255 white carbon black, and add after mixing evenly Plasticizer 15 parts of bis(butoxyethoxyethyl) adipate, 15 parts of dioctyl sebacate, finally add 0.6 parts of DCP, 2.0 parts of PK 9000, mix well and park for 1-3 days, vulcanize, test.

[0030] Sample vulcanization conditions: 170°C*12min.

[0031] Performance test results:

[0032] Hardness 51; tensile strength 12.6MPa; elongation 570%; compression set 18.5% (100℃*24h, compression 30%); -50℃ compression cold resistance coefficient 0.32; brittleness temperature <-60℃; flex cracking The number of pinholes is more than 1 million times.

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides a permanent deformation cold resistance nitrile-butadiene rubber composition with low hardness and low compression, which contains nitrile-butadiene rubber, peroxides and auxiliary crosslinking agents; wherein, the auxiliary crosslinking agents are selected from one or a plurality of 1, 3-(citraconic maleimide methyl) benzene, meta phenylene bis maleimide, triallyl cyanurate and triallyl isocyanurate. The nitrile-butadiene rubber which is prepared by the nitrile-butadiene rubber composition has the advantages that peroxide curing system containing the auxiliary crosslinking agents of the invention can improve the cold resistance and has small compression permanent deformation; at the same time, the tensile strength and the elongation at break are large, and the fatigability is good. The advantages are not possessed by the curing systems that singly use peroxides and the combination of the peroxide sulphur and other auxiliary crosslinking agents.

Description

technical field [0001] The invention relates to a nitrile rubber composition, in particular to a cold-resistant nitrile rubber composition with low hardness and low compression set. Background technique [0002] Nitrile-butadiene rubber (NBR) has excellent oil resistance. At present, it has been widely used as a general oil-resistant rubber in various diaphragms, Y-rings, sealing rings, rubber pads and other products. During the use of these oil-resistant rubber products, due to the needs of the working environment under certain working conditions, in addition to excellent oil resistance, very good low-temperature cold resistance and low compression set performance are also required. If the low temperature cold resistance and compression set performance are not good, it will affect the performance of the product. [0003] In this regard, the current solution is to use low acrylonitrile NBR (or low acrylonitrile NBR and use butadiene rubber and natural rubber with good cold ...

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 Applications(China)
IPC IPC(8): C08L9/02C08K5/14C08K5/3415C08K5/3492C08K3/04C08K3/36
Inventor 贺春江杨维坚
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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