CN111349278B - Sizing material for floating oil seal and preparation method thereof - Google Patents
Sizing material for floating oil seal and preparation method thereof Download PDFInfo
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- CN111349278B CN111349278B CN201811582365.4A CN201811582365A CN111349278B CN 111349278 B CN111349278 B CN 111349278B CN 201811582365 A CN201811582365 A CN 201811582365A CN 111349278 B CN111349278 B CN 111349278B
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- 239000000463 material Substances 0.000 title claims abstract description 51
- 238000004513 sizing Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229920001971 elastomer Polymers 0.000 claims abstract description 34
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 28
- 239000006229 carbon black Substances 0.000 claims abstract description 27
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011787 zinc oxide Substances 0.000 claims abstract description 23
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 31
- 238000007789 sealing Methods 0.000 description 7
- 238000004073 vulcanization Methods 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 6
- 238000004898 kneading Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003738 black carbon Substances 0.000 description 1
- 150000008363 butyronitriles Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
The rubber material comprises, by weight, 80-120 parts of hydrogenated nitrile rubber, 1-8 parts of zinc oxide, 20-55 parts of carbon black, 4451-3 parts of an anti-aging agent, 7592-15 parts of TP, 5-10 parts of VC-40CC, 2.5-4 parts of TAIC and 1533-10 parts of RICON. The sizing material for the floating oil seal has the advantages of excellent performance, high tensile strength, high-temperature aging resistance and excellent low-temperature resistance, so that the product can keep excellent performance in a use environment with extremely high rotating speed, and the use requirement of the product can be met far.
Description
Technical Field
The invention belongs to the technical field of oil seal sizing materials, relates to a sizing material of a floating oil seal for an oil field downhole tool and a preparation method thereof, and particularly relates to a sizing material for an oil seal and a preparation method thereof.
Background
Floating oil seals are commonly used in planetary reducers of traveling parts of construction machinery to dynamically seal end faces of the parts. Due to their high reliability, have also been used in recent years as dynamic seals for oilfield downhole tools. The seal belongs to mechanical seal and generally comprises a floating ring made of iron alloy material and a matched O-shaped seal ring made of materials such as nitrile rubber, fluorine rubber and the like. The floating rings are used in pairs, one rotating with the rotating member and one relatively stationary. The sealing principle of the floating oil seal is as follows: the two floating rings are deformed by the O-shaped sealing ring after being compressed axially, and pressing force on the sealing end faces of the floating rings is generated. With the uniform wear of the sealing end faces, this elastic energy stored by the O-ring is gradually released, thereby providing an axial compensation. The sealing surface can keep good fit within a set time, and the service life of the sealing surface is generally more than 4000 hours.
At present, the environment of hydraulic oil and slurry in the environment contacted with a floating oil seal for a downhole tool is extremely severe, the material is required to have high and low temperature resistance, corrosion resistance and good pressure deformation performance, and particularly in winter, if the low temperature performance of the material is poor, the material can be hardened and lose elasticity in the environment of minus 40 to minus 50 ℃, so that the sealing is failed. The existing sizing material has poor low temperature property and relatively large pressure change, and is easy to become hard and brittle in winter and large in deformation, so that the existing sizing material is damaged and deformed to lose efficacy.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hydrogenated butyronitrile rubber material for a floating oil seal of an oil field downhole tool; the rubber material adopts the black carbon black filler, has better reinforcing performance compared with an inorganic filler, and meanwhile, the crosslinking auxiliary agent is further added into the formula, so that the crosslinking of the rubber material can be further improved, and the pressure-variable performance of the rubber material is improved, so that the material finally has good pressure-variable performance, excellent heat-resistant aging and low-temperature resistance, and can meet the requirement that the product can not leak oil after being continuously operated for 4000 hours under the conditions of-40 to-50 ℃.
The second purpose of the invention is to provide a preparation method of a sizing material for a floating oil seal of an oil field downhole tool, and in order to solve the technical problem, the preparation method of the floating oil seal of the oil field downhole tool comprises the following steps: preparing the raw materials into mixed rubber by using an internal mixer; then the mixed rubber is heated and mixed by an open mill and is molded by a preforming machine; and phosphorizing the used framework, coating an adhesive, putting the mixed rubber and the framework into a mold for vulcanization, and carrying out secondary vulcanization, trimming, spring hanging, inspection, packaging and warehousing on the vulcanized semi-finished product.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a sizing material for a floating oil seal comprises, by weight, 80-120 parts of hydrogenated nitrile rubber, 1-8 parts of zinc oxide, 20-55 parts of carbon black, 4451-3 parts of an anti-aging agent, 7592-15 parts of TP, 5-10 parts of VC-40CC, 2.5-4 parts of TAIC and 1533-10 parts of RICON.
The sizing material for the floating oil seal comprises, by weight, 100 parts of hydrogenated nitrile rubber, 5 parts of zinc oxide, 45 parts of carbon black, 4451.5 parts of an anti-aging agent, 7595 parts of TP, 8 parts of VC-40CC, 3 parts of TAIC and 1538 parts of RICON.
The rubber material for the floating oil seal comprises, by weight, 80 parts of hydrogenated nitrile rubber, 1 part of zinc oxide, 20 parts of carbon black, 4451 parts of an anti-aging agent, 7592 parts of TP, 5 parts of VC-40CC, 2.5 parts of TAIC and 1533 parts of RICON.
A sizing material for a floating oil seal comprises, by weight, 120 parts of hydrogenated nitrile rubber, 8 parts of zinc oxide, 55 parts of carbon black, 4453 parts of an anti-aging agent, 75915 parts of TP, 10 parts of VC-40CC, 4 parts of TAIC and 15310 parts of RICON.
The preparation method of the sizing material for the floating oil seal adopts a mode of combining roll-wrapping plastication and thin-passing plastication, and comprises the following steps:
A. setting the roller spacing to be 2-3mm, introducing cooling water, plasticating hydrogenated nitrile rubber, wrapping the hydrogenated nitrile rubber, tapping and rolling the hydrogenated nitrile rubber for 3 times for 5min, adding zinc oxide, an anti-aging agent, carbon black and TP759, controlling the time for 8min, then adding VC-40CC, TAIC and RICON 153 for 3min, uniformly mixing and taking out the mixture, and adding the mixture for 11 min;
B. Adjusting the roller spacing to be less than 1mm, performing thin pass plastication for 5 times, then enlarging the roller spacing for sheet feeding, and naturally cooling for 2 min.
The temperature is controlled to be less than 90 ℃ in the whole process.
The preparation method of the sizing material for the floating oil seal comprises the following steps:
(1) mixing by an internal mixer, controlling the rotating speed of a rotor to be 32r/min, and adding hydrogenated nitrile rubber for 2 min;
(2) adding zinc oxide, anti-aging agent, carbon black and TP759 for 10 min;
(3) adding VC-40CC, TAIC, RICON 153 for 1 min;
(3) and (5) removing the glue and cooling.
The invention has the beneficial effects that:
the floating oil seal adopting the raw materials has the advantages of excellent performance, high tensile strength, high-temperature aging resistance and excellent low-temperature resistance, so that the product can keep excellent performance under the use environment with extremely high rotating speed, the use requirements can be met far away, and the raw material proportion is unique and novel.
The preparation method provided by the invention is convenient to operate, simple to control, stable in operation in the whole process, and stable in performance and good in quality of the prepared rubber material.
The hardness of the material can be improved by adding zinc oxide, carbon black and VC-40CC, and the compression set of the material is reduced by adding TAIC, TP759 and RICON 153, so that the material with high hardness and lower compression set is obtained.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Detailed description of the preferred embodiments
Example 1
A sizing material for a floating oil seal comprises, by weight, 80 parts of hydrogenated nitrile rubber, 1 part of zinc oxide, 20 parts of carbon black, 4451 parts of an anti-aging agent, 7592 parts of TP, 5 parts of VC-40CC, 2.5 parts of TAIC (for short for triallyl isocyanate) and 1533 parts of RICON.
The following procedure was used to prepare the compounded rubber:
TABLE 1
The mixing time of the internal mixer is generally between 8 and 15 min. In order to achieve good dispersion, a slightly longer kneading time is required, and rubber is kneaded in an internal mixer during production and processing, and the following two methods are available:
(1) when a high-quality rubber compound is mixed, since the rubber content is high and the dispersion is good, carbon black and TP759 are gradually added in the same way as in the mixing by an open mill.
(2) When mixing low-quality rubber materials or when the clearance between the rotor and the chamber wall of the internal mixer is large, a large amount of carbon black and TP759 can be simultaneously added.
The mixing of the internal mixer has two points: firstly, kneading the mixed rubber material into a mass; secondly, the shearing force is effectively utilized to ensure that the dispersion is good. If the internal mixer has good properties and is capable of kneading the rubber material well, only good dispersion can be considered. If the gap between the rotor and the chamber wall of the internal mixer is large, or if a formulation with a low rubber content is to be mixed, the kneaded rubber is the first place and the good dispersion is the second place. At this time, the charging coefficient should be increased to 65-75% to knead the rubber material into a mass, the high charging coefficient is easy to cause scorching, and the low charging coefficient is easy to be dispersed.
Then the mixed rubber is heated and mixed by an open mill and is molded by a preforming machine; and phosphorizing the used framework, coating an adhesive, putting the mixed rubber and the framework into a mold for vulcanization, and performing secondary vulcanization, finishing, inspection, packaging and warehousing on the vulcanized semi-finished product.
Example 2
A sizing material for a floating oil seal comprises, by weight, 120 parts of hydrogenated nitrile rubber, 8 parts of zinc oxide, 55 parts of carbon black, 4453 parts of an anti-aging agent, 75915 parts of TP, 10 parts of VC-40CC, 4 parts of TAIC and 15310 parts of RICON. The following procedure was used to prepare the compounded rubber:
TABLE 2
Example 3
The sizing material for the floating oil seal comprises, by weight, 100 parts of hydrogenated nitrile rubber, 5 parts of zinc oxide, 45 parts of carbon black, 4451.5 parts of an anti-aging agent, 7595 parts of TP, 8 parts of VC-40CC, 3 parts of TAIC and 1538 parts of RICON.
The following procedure was used to prepare the compounded rubber:
TABLE 3
Example 4
The sizing material for the floating oil seal comprises, by weight, 90 parts of hydrogenated nitrile rubber, 2 parts of zinc oxide, 30 parts of carbon black, 4451 parts of an anti-aging agent, 7594 parts of TP, 6 parts of VC-40CC, 3 parts of TAIC and 1534 parts of RICON.
The following procedure was used to prepare the compounded rubber:
TABLE 4
When the mixing temperature is too high, roll sticking can be generated, powder is not uniformly dispersed, even scorching can be generated, cooling in the mixing process must be enhanced, the mixing temperature is kept below 90 ℃, and feeding can be ensured under an elastic state. The carbon black can only be added in small amount one by one, the rubber tapping and rolling are stopped before the carbon black is fully mixed, which is the reason of poor dispersion, when the VC-40CC, TAIC and RICON 153 are added, the cutter is strictly forbidden, and the liquid VC-40CC, TAIC and RICON 153 are prevented from flowing.
Example 5
The sizing material for the floating oil seal comprises, by weight, 100 parts of hydrogenated nitrile rubber, 3 parts of zinc oxide, 40 parts of carbon black, 4452 parts of an anti-aging agent, 7596 parts of TP, 7 parts of VC-40CC, 3.5 parts of TAIC and 1535 parts of RICON.
The compound can be prepared by a conventional mixing method, and preferably by selecting the two methods provided by the invention.
For example, the conventional method: putting hydrogenated nitrile rubber into an open mill for thinly passing for 3 times, then uniformly mixing the hydrogenated nitrile rubber with the open mill, sequentially adding zinc oxide, carbon black, an anti-aging agent 445, TP759, VC-40CC, TAIC and RICON 153 into the open mill for mixing until the mixture is uniform, then discharging the mixture to obtain a mixed rubber, carrying out primary vulcanization on the mixed rubber on a flat vulcanizing machine, controlling the vulcanization temperature to be 150-; and taking the rubber out of the flat vulcanizing machine, and then carrying out secondary vulcanization in an oven at the temperature of 150-170 ℃ for 2h to obtain vulcanized rubber.
Example 6
The sizing material for the floating oil seal comprises, by weight, 110 parts of hydrogenated nitrile rubber, 4 parts of zinc oxide, 50 parts of carbon black, 4453 parts of an anti-aging agent, 7598 parts of TP, 8 parts of VC-40CC, 2.5 parts of TAIC and 1536 parts of RICON.
The preparation can be carried out by a conventional mixing method, and more preferably, the two methods provided by the invention are selected for preparation.
Example 7
A sizing material for a floating oil seal comprises, by weight, 85 parts of hydrogenated nitrile rubber, 5 parts of zinc oxide, 25 parts of carbon black, 4451.5 parts of an anti-aging agent, 75910 parts of TP, 9 parts of VC-40CC, 4 parts of TAIC and 1537 parts of RICON.
The preparation can be carried out by a conventional mixing method, and more preferably, the two methods provided by the invention are selected for preparation.
Example 8
The sizing material for the floating oil seal comprises, by weight, 95 parts of hydrogenated nitrile rubber, 6 parts of zinc oxide, 35 parts of carbon black, 4452.5 parts of an anti-aging agent, 75912 parts of TP, 7.5 parts of VC-40CC, 3 parts of TAIC and 1538 parts of RICON.
The preparation can be carried out by a conventional mixing method, and more preferably, the two methods provided by the invention are selected for preparation.
Example 9
A sizing material for a floating oil seal comprises, by weight, 105 parts of hydrogenated nitrile rubber, 7 parts of zinc oxide, 45 parts of carbon black, 4452 parts of an anti-aging agent, 7599 parts of TP, 8.5 parts of VC-40CC, 3.5 parts of TAIC and 1539 parts of RICON.
The preparation can be carried out by a conventional mixing method, and more preferably, the two methods provided by the invention are selected for preparation.
Second, performance detection
1. For example 3, the properties of the products prepared are shown in the following table:
TABLE 1
2. Other examples the results of the performance tests are shown in table 2.
Claims (4)
1. The preparation method of the sizing material for the floating oil seal is characterized in that the formula of the sizing material for the floating oil seal is as follows: according to parts by weight, the material comprises 80-120 parts of hydrogenated nitrile rubber, 1-8 parts of zinc oxide, 20-55 parts of carbon black, 4451-3 parts of anti-aging agent, 7592-15 parts of TP, 5-10 parts of VC-40CC, 2.5-4 parts of TAIC and 1533-10 parts of RICON;
the preparation method of the sizing material for the floating oil seal comprises one of the following two modes:
the method I comprises the following steps: the method combining roll-coating plastication and thin-pass plastication comprises the following steps:
A. setting the roller spacing to be 2-3mm, introducing cooling water, plasticating hydrogenated nitrile rubber, wrapping the hydrogenated nitrile rubber, tapping and rolling the hydrogenated nitrile rubber for 3 times for 5min, adding zinc oxide, an anti-aging agent, carbon black and TP759, controlling the time for 8min, then adding VC-40CC, TAIC and RICON 153 for 3min, uniformly mixing and taking out the mixture, and adding the mixture for 11 min;
B. adjusting the roller spacing to be less than 1mm, performing thin pass plastication for 5 times, then enlarging the roller spacing for sheet feeding, and naturally cooling for 2 min;
the second method comprises the following steps: the method comprises the following steps:
(1) mixing by an internal mixer, controlling the rotating speed of a rotor to be 32r/min, and adding hydrogenated nitrile rubber for 2 min;
(2) adding zinc oxide, anti-aging agent, carbon black and TP759 for 10 min;
(3) Adding VC-40CC, TAIC, RICON 153 for 1 min;
(3) and (5) removing the glue and cooling.
2. The method for preparing the rubber material for the floating oil seal according to claim 1, wherein the rubber material comprises 100 parts by weight of hydrogenated nitrile rubber, 5 parts by weight of zinc oxide, 45 parts by weight of carbon black, 4451.5 parts by weight of anti-aging agent, 7595 parts by weight of TP, VC-40CC 8 parts by weight of TAIC 3 parts by weight of RICON 1538 parts by weight of rubber.
3. The method for preparing the rubber material for the floating oil seal according to claim 1, wherein the rubber material comprises 80 parts by weight of hydrogenated nitrile rubber, 1 part by weight of zinc oxide, 20 parts by weight of carbon black, 4451 parts by weight of anti-aging agent, 7592 parts by weight of TP, 5 parts by weight of VC-40CC, 2.5 parts by weight of TAIC and 1533 parts by weight of RICON.
4. The method for preparing the sizing material for the floating oil seal according to claim 1, wherein in the first mode, the temperature is controlled to be less than 90 ℃ in the whole process.
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| CN201811582365.4A CN111349278B (en) | 2018-12-24 | 2018-12-24 | Sizing material for floating oil seal and preparation method thereof |
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| JP4779068B2 (en) * | 2004-11-04 | 2011-09-21 | イーグル工業株式会社 | Hydrogenated nitrile rubber composition |
| CN104177677A (en) * | 2013-08-23 | 2014-12-03 | 青岛开世密封工业有限公司 | High-strength low-compressive-strain easily-adhesive mixed rubber and sealing gasket thereof |
| CN107964144B (en) * | 2016-10-18 | 2020-07-21 | 中国石油化工股份有限公司 | Rubber composition, vulcanized rubber and rubber tube |
| CN108424557B (en) * | 2018-04-28 | 2021-02-12 | 南京金三力高分子科技有限公司 | Diesel-resistant low-pressure-change nitrile rubber material and preparation method thereof |
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Application publication date: 20200630 Assignee: Hebei Gaosheng Rubber and Plastic Technology Co.,Ltd. Assignor: Qingdao Gaotejia Rubber and Plastic Research Institute Co.,Ltd.|GAOKE RUBBER & PLASTIC INDUSTRIAL CO.,LTD. Contract record no.: X2023980046146 Denomination of invention: A rubber material for floating oil seals and its preparation method Granted publication date: 20220607 License type: Common License Record date: 20231107 |
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