CN102875861A - Modified hydrogenated nitrile material for thermal power plant ash valve sealing ring and preparation process of modified hydrogenated nitrile material - Google Patents
Modified hydrogenated nitrile material for thermal power plant ash valve sealing ring and preparation process of modified hydrogenated nitrile material Download PDFInfo
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- CN102875861A CN102875861A CN2012103928465A CN201210392846A CN102875861A CN 102875861 A CN102875861 A CN 102875861A CN 2012103928465 A CN2012103928465 A CN 2012103928465A CN 201210392846 A CN201210392846 A CN 201210392846A CN 102875861 A CN102875861 A CN 102875861A
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Abstract
The invention discloses a modified hydrogenated nitrile material for a thermal power plant ash valve sealing ring and a preparation process thereof. The preparation process comprises the steps of rubber mixing hydrogenated nitrile raw rubber until the rubber covers rollers; adding black carbon Cabot N550, a protective agent Lanxess 3446, zinc oxide with 99.7% of purity, and a dimethyl disulfide (DMDS) vulcanizing reagent in sequence until all the materials are mixed with the raw rubber; controlling a roller spacing, thinning until sheets are generated; preheating a vulcanizing machine and a die; placing the mixed raw rubber into the vulcanizing machine for vulcanizing, wherein cross-linking of sulphur occurs during the vulcanizing procedure; linking one or more sulphur atoms onto a polymer chain to form a bridge structure; performing second vulcanizing, taking out a sealing ring formed after the first vulcanizing for air cooling to the room temperature, rising the temperature of the die, and placing the sealing ring into the die for mold insulation and heat preservation. The modified hydrogenated nitrile material for the thermal power plant ash valve sealing ring disclosed by the invention has high tensile strength, high temperature resistance, abrasive resistance, ageing resistance, impact resistance and good compression resilience, and has obvious superiority compared with the traditional sealing ring.
Description
Technical field
The present invention relates to the valve seal loop material, relate in particular to a kind of modified hydrogenated butyronitrile material and manufacturing process thereof for thermoelectricity ash disposal valve sealing ring.
Background technology
Because the special operation condition condition of thermoelectricity cinder-removing system (high-speed, high dust concentration, the material abradability is strong, temperature is high, system reliability requires high), valve as thermoelectricity cinder-removing system key part, especially the sealing-ring of valve, owing to being subjected to high-temperature material to wash away, corrode, the sealing position is is very easily worn and torn, wears out, is torn etc., causes the reduction of valve switch performance, even lost efficacy, cause system out of service, affect the normal operation of whole production system, produce problem of environmental pollution.Therefore, as thermoelectricity ash disposal valve, the quality of sealing-ring has determined use properties and the life-span of valve.
At present, adopt nitrile rubber (NBR) sealing-ring, viton (VITON) or second the third glue (EPDM) as main raw as thermoelectricity ash disposal system valve sealing ring majority both at home and abroad.Paracril has good wear resisting property and heat aging property, but its mechanical property is bad, and tensile strength is lower, and resilience is relatively poor, and the temperature tolerance of common paracril neither be fine.Hydrogenation butadiene acrylonitrile rubber (HNBR) is double-stranded via removing part after the hydrogenation in the butadiene acrylonitrile rubber, its high thermal resistance after hydrogenation (can reach 150 ℃), weathering resistance improve a lot than general nitrile rubber, oil-proofness is close with general butadiene acrylonitrile rubber, has better resistance to abrasion, against corrosion, anti-, anti-tear and compressibility than butadiene acrylonitrile rubber; Viton has good resistance to elevated temperatures (can reach 250 ℃), but its tensile strength at high temperature is lower.Second the third glue is formed by ethene and copolymerization of propylene, so thermotolerance, ageing resistance, ozone resistance, stability are all very outstanding, and the normal operation temperature is (50 ℃～150 ℃), but its anti-, anti-tear relatively poor than hydrogenated butyronitrile, the resilience extreme difference.Above-mentioned materials can not have good over-all properties simultaneously, and the space still improves a lot.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and have simultaneously enhancing, toughness reinforcing, wear-resisting, high temperature resistant, ageing-resistant, high resistance is opened and the modified hydrogenated butyronitrile material and the manufacturing process thereof that are used for thermoelectricity ash disposal valve sealing ring of impart tear.
The modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring be take the component of the modified hydrogenated butyronitrile material of mass percentage content as: hydrogenated butyronitrile content as 63.1%～63.5%, bright Sheng 3446 content of protective agent Germany as 0.93%～0.96%, the zinc oxide content of purity 99.7% as 3.12%～3.17%, carbon black Cabot N550 content as 31.2%～31.7%, DMDS vulcanizing agent content is as 1.22%～1.28%.
The modified hydrogenated butyronitrile material manufacturing process that is used for thermoelectricity ash disposal valve sealing ring is: at first 63.1%～63.5% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then adding successively 31.2%～31.7% carbon black Cabot N550,0.93%～0.96% the bright Sheng 3446 of protective agent Germany, 3.12%～3.17% purity is 99.7% zinc oxide, 1.22%～1.28% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, thin-pass 5～6 times is until slice; Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 40min～60min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain; Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, sealing-ring is put into the mould matched moulds again and is incubated 200 min～240min.
Modified hydrogenated butyronitrile material seal circle provided by the invention, the employing hydrogenated butyronitrile is main raw material(s), improved the wear-resistant of sealing-ring, against corrosion, anti-, the over-all propertieies such as anti-tear and compressibility, carbon black Cabot N550 can improve wear resistance and the self lubricity of sealing-ring as the main weighting material of material, the zinc oxide of purity 99.7% can improve the tension of sealing-ring, impart tear, add the bright Sheng 3446 of anti-aging agent Germany, can improve the high thermal resistance of sealing-ring, intensity under the high temperature and ageing-resistant performance add the post cure processibility that the DMDS vulcanizing agent has improved material.Modified hydrogenated butyronitrile material seal circle provided by the invention has simultaneously high-tensile and (reaches the excellent over-all propertieies such as 21 MPa～25MPa), high temperature resistant (can reach 200 ℃), wear-resisting, ageing-resistant, acid and alkali-resistance, rebound resilience are good, self-lubricating, compared significant advantage with the conventional seals circle.
Description of drawings
Fig. 1 is for being used for the modified hydrogenated butyronitrile material flow chart making of thermoelectricity ash disposal valve sealing ring.
Embodiment
The modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring be take the component of the modified hydrogenated butyronitrile material of mass percentage content material as: hydrogenated butyronitrile content as 63.1%～63.5%, bright Sheng 3446 content of protective agent Germany as 0.93%～0.96%, the zinc oxide content of purity 99.7% as 3.12%～3.17%, carbon black Cabot N550 content as 31.2%～31.7%, DMDS vulcanizing agent content is as 1.22%～1.28%.
The modified hydrogenated butyronitrile material manufacturing process that is used for thermoelectricity ash disposal valve sealing ring is: at first 63.1%～63.5% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then adding successively 31.2%～31.7% carbon black Cabot N550,0.93%～0.96% the bright Sheng 3446 of protective agent Germany, 3.12%～3.17% purity is 99.7% zinc oxide, 1.22%～1.28% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, thin-pass 5～6 times is until slice; Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 40min～60min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain; Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, sealing-ring is put into the mould matched moulds again and is incubated 200 min～240min.Thereby temperature tolerance, tension and the tearing strength of sealing-ring are further enhanced.The bright Sheng 3446 of protective agent Germany, carbon black Cabot N550 and DMDS vulcanizing agent can both have been bought in market.
The sealing-ring that utilizes this technique and modified hydrogenated butyronitrile material to make, have high-tensile and (reach 21 MPa～25MPa), high temperature resistant (can reach 200 ℃), wear resistance, ageing resistance, abrasion resistance and compression resilience are excellent, compare with the conventional seals circle to have significant advantage.
Embodiment 1:
The modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring, take the component of the modified hydrogenated butyronitrile material of mass percentage content material as: hydrogenated butyronitrile content as 63.2%, bright Sheng 3446 content of anti-aging agent Germany as 0.93%, the zinc oxide content of purity 99.7% as 3.15%, carbon black Cabot N550 content as 31.5%, DMDS vulcanizing agent content is as 1.22%.
In the synthesis technique of this modified hydrogenated butyronitrile material, at first 63.2% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then adding successively 31.5% carbon black Cabot N550,0.93% the bright Sheng 3446 of anti-aging agent Germany, 3.15% purity is 99.7% zinc oxide, 1.22% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, and thin-pass 5 times is until slice.Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 40min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain.Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, then sealing-ring is put into the mould matched moulds and is incubated 200 min.
Embodiment 2:
The modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring, take the component of the modified hydrogenated butyronitrile material of mass percentage content material as: hydrogenated butyronitrile content as 63.4%, bright Sheng 3446 content of anti-aging agent Germany as 0.94%, the zinc oxide content of purity 99.7% as 3.13%, carbon black Cabot N550 content as 31.3%, DMDS vulcanizing agent content is as 1.23%.
In the synthesis technique of this modified hydrogenated butyronitrile material, at first 63.4% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then adding successively 31.3% carbon black Cabot N550,0.94% the bright Sheng 3446 of anti-aging agent Germany, 3.13% purity is 99.7% zinc oxide, 1.23% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, and thin-pass 6 times is until slice.Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 60min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain.Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, then sealing-ring is put into mould matched moulds insulation 240min.
Embodiment 3:
The modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring, take the component of the modified hydrogenated butyronitrile material of mass percentage content material as: hydrogenated butyronitrile content as 63.1%, bright Sheng 3446 content of anti-aging agent Germany as 0.96%, the zinc oxide content of purity 99.7% as 3.17%, carbon black Cabot N550 content as 31.5%, DMDS vulcanizing agent content is as 1.27%.
In the synthesis technique of this modified hydrogenated butyronitrile material, at first 63.1% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then adding successively 31.5% carbon black Cabot N550,0.96% the bright Sheng 3446 of anti-aging agent Germany, 3.17% purity is 99.7% zinc oxide, 1.27% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, and thin-pass 5 times is until slice.Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 50min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain.Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, then sealing-ring is put into the mould matched moulds and is incubated 220 min.
Claims (2)
1. modified hydrogenated butyronitrile material that is used for thermoelectricity ash disposal valve sealing ring, it is characterized in that take the component of the modified hydrogenated butyronitrile material of mass percentage content as: hydrogenated butyronitrile content as 63.1%～63.5%, bright Sheng 3446 content of protective agent Germany as 0.93%～0.96%, the zinc oxide content of purity as 99.7% as 3.12%～3.17%, carbon black Cabot N550 content as 31.2～31.7%, DMDS vulcanizing agent content is as 1.22%～1.28%.
2. the manufacturing process of the modified hydrogenated butyronitrile material for thermoelectricity ash disposal valve sealing ring as claimed in claim 1, it is characterized in that: at first 63.1%～63.5% hydrogenated butyronitrile rubber is carried out the glue refining, until behind the sizing material bag roller, then add successively 31.2%～31.7% carbon black Cabot N550,0.93%～0.96% the bright Sheng 3446 of protective agent Germany, 3.12%～3.17% purity is 99.7% zinc oxide, 1.22%～1.28% DMDS vulcanizing agent, until all components material is sneaked into rubber, roll spacing is controlled at below the 0.5mm, thin-pass 5～6 times is until slice; Then with vulcanizer and mould and die preheating to 150 ℃, put into the rubber sulfuration 40min～60min that mixes, the crosslinked of sulphur occured in the sulfidation, one or more sulphur atoms is connected on forms bridge-like structure on the polymer chain; Carry out at last post cure, the sealing-ring behind the primary vulcanization is taken out air cooling to room temperature, die temperature rises to 170 ℃, sealing-ring is put into the mould matched moulds again and is incubated 200 min～240min.
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| CN2012103928465A CN102875861A (en) | 2012-10-17 | 2012-10-17 | Modified hydrogenated nitrile material for thermal power plant ash valve sealing ring and preparation process of modified hydrogenated nitrile material |
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| CN2012103928465A CN102875861A (en) | 2012-10-17 | 2012-10-17 | Modified hydrogenated nitrile material for thermal power plant ash valve sealing ring and preparation process of modified hydrogenated nitrile material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110157060A (en) * | 2018-01-30 | 2019-08-23 | 浙江固特气动科技股份有限公司 | A kind of modified rubber material for Pneumatic ash conveying valve sealing ring |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422284A (en) * | 2000-04-10 | 2003-06-04 | 拜尔公司 | Process for hydrogenating carboxylated nitrile rubber, the hydrogenated rubber and its use |
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- 2012-10-17 CN CN2012103928465A patent/CN102875861A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422284A (en) * | 2000-04-10 | 2003-06-04 | 拜尔公司 | Process for hydrogenating carboxylated nitrile rubber, the hydrogenated rubber and its use |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110157060A (en) * | 2018-01-30 | 2019-08-23 | 浙江固特气动科技股份有限公司 | A kind of modified rubber material for Pneumatic ash conveying valve sealing ring |
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Application publication date: 20130116 |