CN101747539A - Nitrile butadiene rubber - Google Patents
Nitrile butadiene rubber Download PDFInfo
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- CN101747539A CN101747539A CN200810229506A CN200810229506A CN101747539A CN 101747539 A CN101747539 A CN 101747539A CN 200810229506 A CN200810229506 A CN 200810229506A CN 200810229506 A CN200810229506 A CN 200810229506A CN 101747539 A CN101747539 A CN 101747539A
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- nitrile butadiene
- paracril
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Abstract
The invention discloses a nitrile butadiene rubber, which is characterized in that: the nitrile butadiene rubber consists of crude rubber, a vulcanizing agent, a filling reinforcing agent, a plasticizing agent, an age inhibitor and an auxiliary agent; and the nitrile butadiene rubber comprises the following components in part by mass: 100 parts of nitrile butadiene crude rubber NBR, 1 to 20 parts of stearic acid, 5 to 20 parts of peroxide, 0.1 to 100 parts of carbon black, 2.0 parts of the age inhibitor IMDQ and the balance of the auxiliary agent. The nitrile butadiene rubber has the advantages that: the nitrile butadiene rubber mass can improve the capacity of resisting a jet fuel with the temperature of 150 DEG C of a rubber part produced by the nitrile butadiene rubber, improve the sealing safety and the reliability of the rubber, lower corresponding replacement cost and greatly prolong the service life of the part.
Description
Technical field
The present invention relates to the sealing material field, a kind of paracril is provided especially.
Background technology
Paracril is because the random copolymers that divinyl and vinyl cyanide make through letex polymerization.Because the existence of polarity itrile group is arranged, therefore mineral oil, liquid fuel and the solvent etc. to nonpolar or low-pole have advantages of higher stability in the paracril structure, and aromatic solvent, ketone, ester isopolarity material then have swelling action to it.The swelling property of paracril in solvent is relevant with the character of solvent, and it is high that the aniline point of solvent is healed low or aromaticity content is healed, and the swelling ability is bigger, and the stability of paracril in solvent is just poorer.Increase with the bound acrylonitrile amount improves paracril to the stability of solvent.
The resistance toheat of paracril is better than natural rubber, styrene-butadiene rubber(SBR) and chloroprene rubber, and with other rubber phase ratios, paracril has the use temperature scope of broad, can be in air 120 ℃ of following life-time service.The bound acrylonitrile amount that improves in the paracril can be improved thermotolerance, but reduces winter hardiness.
Paracril is vulnerable to the destruction of ozone because of the tool nonsaturation, and molecular chain is flexible poor in addition, makes the ozone-induced cracking propagation rate very fast.When especially goods in use contacted with oil, the antiozonidate that adds during cooperation was easily extracted out by oil, caused the ability drop of protection ozone layer destroying.
Summary of the invention
The purpose of this invention is to provide a kind of high rigidity, low compression deformation, thermotolerance and winter hardiness are better, the paracril that processing characteristics is good.
The invention provides a kind of paracril, it is characterized in that: described paracril is made up of rubber, vulcanizing agent, packing strengthening agent, softening agent, anti-aging agent and auxiliary agent; The relative mass umber is 100 parts of butyronitrile rubber NBR; 1～20 part of stearic acid dosage; Amount of peroxide: 5～20 parts; 0.1～100 part of carbon black loading; Anti-aging agent: 2.0 parts of TMDQ consumptions, surplus are auxiliary agent.
Described paracril is characterized in that: described softening agent is: paracril mainly uses ester plasticizer, is used to improve the sizing material processing characteristics, improves winter hardiness and elasticity; In order to satisfy the cold tolerance requirement of material, having selected dibutyl phthalate for use is that DBP, dioctyl sebacate are that DOS, di butoxyethoxyethyl adipate are that TP-95, ether-ether mixed type softening agent are softening agent.
Rubber: this sizing material is wanted anti-No. 3 rocket engine fuels, will have good low-temperature performance simultaneously, therefore selects suitable rubber particularly important.Acrylonitrile content is the important indicator of paracril performance, the butyronitrile rubber that acrylonitrile content is low, and cold tolerance is better.But along with the reduction of acrylonitrile content, the media-resistant of rubber and thermotolerance also can descend.Select dissimilar butyronitrile rubbers for use, along with increasing of acrylonitrile content, the winter hardiness of sizing material reduces, but volume change reduces in No. 3 rocket engine fuels.
Vulcanizing agent: the vulcanization system that paracril is commonly used has sulfur cross-linking system, semi effcient vulcanization system and peroxide vulcanizing system; Sulfur cross-linking system, cross-link bond are polysulfidic bond, cross-linked rubber compression tension set poor-performing, and tensile yield, changes in hardness after the thermal ageing are big; The semi effcient vulcanization system forms monosulfidic bond and polysulfidic bond, and cross-linked rubber is heat-resisting, compression tension set performance is good than the sizing material of sulfur cross-linking, but tensile strength is lower.Peroxide vulcanizing agent forms carbon-carbon single bond, and is heat-resisting and compression tension set performance is good, the volume change minimum in No. 3 rocket engine fuels, but tensile yield is lower.
Strengthening agent: the sooty reinforcing effect is followed successively by spray carbon black, SRF, thermals; Dissimilar carbon black filled sizing material low-temperature performancies are close; Fill the sizing material of spray carbon black, thermal aging property, media-resistant volume change performance are slightly excellent; The adding of white carbon black can obviously improve the performance of anti-No. 3 rocket engine fuels of sizing material, and the tensile yield in No. 3 rocket engine fuels changes and reduces, but compression set increases.The improvement of compression tension set performance can realize by increasing post vulcanization, therefore changes for reducing No. 3 tensile yield in the rocket engine fuel, can and use the part white carbon black.
Anti-aging agent: the amines antioxidants RD that paracril is commonly used, soak No. 3 rocket engine fuels after tensile yield change greatly, with the increase of consumption, tensile yield changes and makes moderate progress, but sulphidity weakens, heat-resisting air aging, compression set performance reduce.The sizing material of dosing anti-aging agent soak behind No. 3 rocket engine fuels tensile yield change less, and with antioxidant MB and better with the back effect.
Advantage of the present invention:
Use nitrile rubber sizing material of the present invention, can improve the ability of the anti-150 ℃ rocket engine fuel of the made rubber part of paracril, use the safe reliability of rubber seal to improve, reduce corresponding replacement cost, greatly prolonged the work-ing life of part.
Embodiment
Embodiment 1
Present embodiment provides a kind of paracril, it is characterized in that: described paracril is made up of rubber, vulcanizing agent, packing strengthening agent, softening agent, anti-aging agent and auxiliary agent; The relative mass umber is 100 parts of butyronitrile rubber NBR; 1 part of stearic acid dosage; Amount of peroxide: 5 parts; 20 parts of carbon black loadings; Anti-aging agent: 2.0 parts of TMDQ consumptions, surplus are auxiliary agent.
Described softening agent is: paracril mainly uses ester plasticizer, is used to improve the sizing material processing characteristics, improves winter hardiness and elasticity; In order to satisfy the cold tolerance requirement of material, having selected dibutyl phthalate for use is that DBP, dioctyl sebacate are that DOS, di butoxyethoxyethyl adipate are that TP-95, ether-ether mixed type softening agent are softening agent.
The salient features of nitrile rubber sizing material sees Table 1
Table 1
| Sequence number | Project | Test-results |
| ??1 | Tensile strength, MPa | ??20.2 |
| ??2 | Tensile yield, % | ??150 |
| ??4 | Hardness (Shao Er A), degree | ??80 |
| ??5 | 150 ℃ * 24h of anti-No. 3 rocket engine fuels: volume change, % constant compression tension set (rate of compression 20%), the % tensile yield changes, % | ??1.2??21??-6.7 |
| ??6 | 125 ℃ * 72h of hot air aging tensile yield changes, % | ??-26 |
| Sequence number | Project | Test-results |
| ??7 | The cold-resistant coefficient (40 ℃) of compression | ??0.25 |
Embodiment 2
Present embodiment provides a kind of paracril, it is characterized in that: described paracril is made up of rubber, vulcanizing agent, packing strengthening agent, softening agent, anti-aging agent and auxiliary agent; The relative mass umber is 100 parts of butyronitrile rubber NBR; 10 parts of stearic acid dosage; Amount of peroxide: 20 parts; 60 parts of carbon black loadings; Anti-aging agent: 2.0 parts of TMDQ consumptions, surplus are auxiliary agent.
Described softening agent is: paracril mainly uses ester plasticizer, is used to improve the sizing material processing characteristics, improves winter hardiness and elasticity; In order to satisfy the cold tolerance requirement of material, having selected dibutyl phthalate for use is that DBP, dioctyl sebacate are that DOS, di butoxyethoxyethyl adipate are that TP-95, ether-ether mixed type softening agent are softening agent.
The salient features of nitrile rubber sizing material sees Table 2
Table 2
| Sequence number | Project | Test-results |
| ??1 | Tensile strength, MPa | ??20 |
| ??2 | Tensile yield, % | ??160 |
| ??4 | Hardness (Shao Er A), degree | ??80 |
| ??5 | 150 ℃ * 24h of anti-No. 3 rocket engine fuels: volume change, % constant compression tension set (rate of compression 20%), the % tensile yield changes, % | ??1.2??20??-6.7 |
| ??6 | 125 ℃ * 72h of hot air aging tensile yield changes, % | ??-25 |
| ??7 | The cold-resistant coefficient (40 ℃) of compression | ??0.25 |
Claims (2)
1. paracril, it is characterized in that: described paracril is made up of rubber, vulcanizing agent, packing strengthening agent, softening agent, anti-aging agent and auxiliary agent; The relative mass umber is 100 parts of butyronitrile rubber NBR; 1～20 part of stearic acid dosage; Amount of peroxide: 5～20 parts; 0.1～100 part of carbon black loading; Anti-aging agent: 2.0 parts of TMDQ consumptions, surplus are auxiliary agent.
2. according to the described paracril of claim 1, it is characterized in that: described softening agent is: dibutyl phthalate is that DBP, dioctyl sebacate are that DOS, di butoxyethoxyethyl adipate are TP-95, ether-ether mixed type softening agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229506A CN101747539A (en) | 2008-12-10 | 2008-12-10 | Nitrile butadiene rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229506A CN101747539A (en) | 2008-12-10 | 2008-12-10 | Nitrile butadiene rubber |
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| Publication Number | Publication Date |
|---|---|
| CN101747539A true CN101747539A (en) | 2010-06-23 |
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| CN200810229506A Pending CN101747539A (en) | 2008-12-10 | 2008-12-10 | Nitrile butadiene rubber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103289150A (en) * | 2013-05-06 | 2013-09-11 | 广州加士特密封技术有限公司 | Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof |
| CN104017253A (en) * | 2014-05-19 | 2014-09-03 | 徐伯琴 | Expansion tank leather film |
| CN105732907A (en) * | 2014-12-11 | 2016-07-06 | 中国石油天然气股份有限公司 | Preparation method of graft reinforced nitrile rubber |
| CN109503895A (en) * | 2018-11-13 | 2019-03-22 | 大连铁达塑胶制品有限公司 | A kind of oil resistant low temperature resistant rubber and preparation method thereof |
| CN111440365A (en) * | 2020-05-06 | 2020-07-24 | 大庆石油管理局有限公司 | Swelling-resistant nitrile rubber material and preparation method and application thereof |
-
2008
- 2008-12-10 CN CN200810229506A patent/CN101747539A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103289150A (en) * | 2013-05-06 | 2013-09-11 | 广州加士特密封技术有限公司 | Cold-resistant wear-resistant nitrile rubber sealing material and preparation method thereof |
| CN103289150B (en) * | 2013-05-06 | 2015-09-09 | 广州加士特密封技术有限公司 | Acrylonitrile butadiene packing material of a kind of cold-resistant, wear-resisting and preparation method thereof |
| CN104017253A (en) * | 2014-05-19 | 2014-09-03 | 徐伯琴 | Expansion tank leather film |
| CN105732907A (en) * | 2014-12-11 | 2016-07-06 | 中国石油天然气股份有限公司 | Preparation method of graft reinforced nitrile rubber |
| CN105732907B (en) * | 2014-12-11 | 2018-02-02 | 中国石油天然气股份有限公司 | Preparation method of graft reinforced nitrile rubber |
| CN109503895A (en) * | 2018-11-13 | 2019-03-22 | 大连铁达塑胶制品有限公司 | A kind of oil resistant low temperature resistant rubber and preparation method thereof |
| CN111440365A (en) * | 2020-05-06 | 2020-07-24 | 大庆石油管理局有限公司 | Swelling-resistant nitrile rubber material and preparation method and application thereof |
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Open date: 20100623 |