Classifications

• • 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
  • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
  • C08K3/013—Fillers, pigments or reinforcing additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
  • C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
  • C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
  • C10M107/38—Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
  • C10M107/46—Lubricating compositions characterised by the base-material being a macromolecular compound containing sulfur
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
  • C10M125/02—Carbon; Graphite
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
  • C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16J—PISTONS; CYLINDERS; SEALINGS
  • F16J15/00—Sealings
  • F16J15/16—Sealings between relatively-moving surfaces
  • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
  • F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials

Definitions

• the present invention relates to a dry-running polymer sliding material, a mechanical seal comprising a sliding ring made of a dry-running polymer sliding material and the use of such materials for dry running applications, in particular as displacement elements in wet and dry running pumps.
• Displacement pumps such as vacuum vane pumps are not fluid-lubricated in the application as a brake booster in the operating state.
• the pressure-increasing displacement elements rub against the pump housing. This leads to high frictional heat in tribocontact and high heat input in the housing and drive. Even with this type of pump, the thermal damage caused by long dry periods is the primary cause of failure.
• polytetrafluoroethylene can also be used as the material for the rotating seal ring.
• PTFE polytetrafluoroethylene
• the PTFE-ceramic material pairing is only suitable for very lightly loaded seals and has not found wide application.
• mechanical seals are mechanical seals from the combination of materials ceramic to ceramic, preferably made of sintered silicon carbide (SSiC) against SSiC used. Friction values of about 0.05 with liquid lubrication can also be achieved with these pairings, although the dry-running friction coefficients are very high at around 0.8. This mechanical sealations are therefore used only for a few minutes in dry running.
• silicon carbide material variants for example of silicon carbide with graphite additives, slightly longer dry running times of about 10 minutes are possible, but these materials are not used in permanent dry running.
• a constructive solution for a permanently dry-running mechanical seal consists in the design of the mechanical seal as a gas seal with the material pair ceramic / ceramic, the dry friction is greatly reduced by building a gas film between the friction partners - but are very high speeds of usually over 10,000 RPM necessary.
• WO 2012/169604 Al describes a sealing ring comprising polyphthalamide is formed from a resin composition
• the resin composition may still contain additional fillers, among others, carbon fibers, glass fibers, silicon carbide fibers, graphite, MoS 2, A1 2 0 3, MgO, boron nitride and 20 PTFE powder.
• additional fillers among others, carbon fibers, glass fibers, silicon carbide fibers, graphite, MoS 2, A1 2 0 3, MgO, boron nitride and 20 PTFE powder.
• particulate or fibrous ceramic fillers result in high wear on the tribological partner, and the resin compositions are not dry-run.
• the matrix material can not be processed thermoplastically.
• thermoplastic sealing ring in particular for very large sealing diameters.
• an extruded strand is formed into a ring and joined frontally.
• the thermoplastic polymers may contain PTFE or carbon black as fillers.
• DE 10 2008 019 440 A1 proposes the use of polymer materials for slides in dry-running vacuum pumps.
• the polymer materials used have no advantages in dry running compared to graphite and have only limited wear resistance.
• the invention is therefore based on the object while avoiding the disadvantages of the prior art to provide a Polymergleitwerkstoff and a mechanical seal made therefrom, which is both low friction and wear resistant in wet running over long periods, as well as permanently dry run. Furthermore, the invention has for its object to provide a polymer-based sliding material for displacement in dry running pumps available, which allows an extension of the duration in dry running.
• the invention thus provides a polymer sliding material comprising a polymer matrix material and fillers, wherein the fillers comprise reinforcing particles, hard particles and lubricants.
• the invention further relates to a mechanical seal, comprising a rotating seal ring and a stationary counter-ring, wherein the seal ring and / or the counter-ring comprises a polymer sliding material according to the invention.
• the invention further provides the use of such materials for dry running applications, in particular as a material for displacement elements in wet and dry running pumps.
• the polymer sliding material according to the invention is wear-resistant and mechanically stable and, unlike graphite, permanently dry-running.
• the wear resistance is better than that of graphite.
• the polymer sliding material according to the invention enables very low friction losses in wet and dry running. It is suitable for permanent dry running operation as a rotating seal ring and / or as a stationary counter-ring in mechanical seals and as a displacement in wet and dry running pumps such as a slide in vane pumps.
• the mechanical seal according to the invention generates very low friction losses and is characterized by a permanent dry-running capability.
• the mechanical seal according to the invention is inexpensive to produce and is characterized by a very quiet operation in dry running.
• the polymer sliding material according to the invention makes possible the low-noise operation of dry-running pumps.
• the polymer sliding material according to the invention preferably has a low specific density of 1.4 to 1.6 g / cm 3 . This is a further advantage compared to graphite (density 2.2 g / cm 3 ) and, in the case of rotary displacement pumps, additionally reduces the frictional losses due to the reduced normal force on the friction partners.
• the polymer sliding material according to the invention can be produced by the injection molding process, which allows the simple and cost-effective production of components with many design options.
• the polymer sliding material according to the invention thus makes it possible to replace the sintered graphite materials previously used in pump applications as standard. This makes it possible for the first time to use polymer materials in mechanical seals in pumps with low to medium loads up to approx. 16 bar pump pressure.
• the dry friction coefficients of the mechanical seal according to the invention are lower than the comparable mechanical seals with polymer materials, which were prepared with the addition of reinforcing fibers and dry lubricants, but without the use of hard particles, especially submicron ceramic particles.
• the investigated slip rings of the polymer sliding materials according to the invention show in dry running even at very high loads such as speeds of 3000 U / min and surface pressures of 0.6 MPa a very flat, almost free from wear surface. Even after a prolonged period of use of one hour is a flat sliding surface, which has only the slightest form-locking effects. Thus, a very low coefficient of friction is maintained even in continuous operation without fluid lubrication.
• the wet friction coefficients of the mechanical seal according to the invention with the polymer material according to the invention as sliding ring and Al 2 O 3 ceramic as counter ring are on average 0.015 and thus by a factor of 3 lower than in conventional mechanical / mechanical seals made of graphite / ceramic.
• polymer matrix materials for the polymer sliding material materials with high chemical resistance are suitable in the media used in household and motor vehicle circulating pumps, such as water, oil, brake fluids and glycol.
• the polymer matrix materials should be suitable for continuous operation at the maximum application temperatures.
• the maximum application temperatures are 140 ° C for water and 220 ° C for oil.
• the glass transition temperature of the polymer matrix material should be above this temperature.
• the polymer matrix material should preferably be thermoplastically processable.
• the polymer matrix materials should have good pressure resistance and high modulus of elasticity to accommodate low deformation mechanical forces.
• thermoplastically processable high-temperature plastics which are preferably used as polymer matrix materials and which contain the material classes of polyetheretherketones (PEEK), polyaryletherketones (PAEK), polyphenylene sulphides (PPS), polyethersufones (PES, PESU), Polyaryl sulfones (PSU, PPSU), polyetherimides (PEI), polyamides (PA) and liquid crystalline polymers (LCP).
• PEEK polyetheretherketones
• PAEK polyaryletherketones
• PPS polyphenylene sulphides
• PES polyethersufones
• PESU Polyaryl sulfones
• PEI polyetherimides
• PA polyamides
• LCP liquid crystalline polymers
• PI polyimide
• PBI polybenzimidazole
• PTFE polytetrafluoroethylene
• the polymer sliding material according to the invention contains fillers, which can also be referred to as triboadditives.
• fillers As fillers reinforcing particles, lubricants and hard particles are used.
• the reinforcing particles serve for mechanical reinforcement of the polymer material.
• Particularly suitable reinforcing particles are fibrous particles such as, for example, carbon and / or aramid fibers.
• the addition of reinforcing particles increases the modulus of elasticity of the polymer materials. The elastic deformation at a given pressure is reduced with increasing modulus of elasticity, which increases the pressure capacity of the pump components made therefrom such as the sliding ring and the compressive strength of the mechanical seal.
• Carbon fibers are particularly preferably used as mechanical reinforcing particles for the polymer sliding material according to the invention due to the support of the sliding properties and the low abrasiveness on the mating ring of the mechanical seal.
• the content and the grain size or fiber length of the reinforcing particles is selected so that the optimum stiffness and strength values for the respective design result.
• the content of reinforcing particles is preferably 1 to 20% by weight, particularly preferably 5 to 20% by weight, based on the polymer sliding material.
• the fiber length of the fibers preferably used as reinforcing particles such as carbon fibers is preferably less than 200 ⁇ , since longer fibers are not stable in compounding and injection molding.
• silicon carbide, boron carbide, aluminum oxide, silicon dioxide, zirconium dioxide, silicon nitride and diamond particles can be used as hard material particles for the polymer sliding material according to the invention. Also combinations NEN of these hard particles are possible.
• silicon carbide, boron carbide, alumina and silica particles or combinations of these particles are used.
• silicon carbide particles are used as hard material particles.
• Silicon carbide fillers have a hardness of> 9.5 Mohs and are thus harder than all naturally occurring abrasive materials (with the exception of diamond).
• silicon carbide has a very good corrosion stability in almost all liquid pumping media, which is far above the stability of the known polymer matrix materials.
• Another advantage of the design with silicon carbide fillers is the very high thermal conductivity of the silicon carbide of> 120 W / m * K, which can be derived more effectively in the composite material, the resulting frictional heat.
• very fine grains having an average particle size (d 5 o) of not more than 1 ⁇ m are preferably used as the hard material particles.
• the average particle size (d 5 o) of the hard material particles less than 1 ⁇ (submicron), more preferably at most 0.8 ⁇ .
• the hard material particles preferably have a low aspect ratio (ratio length to diameter) of 2 and less, which has a favorable effect on the reduction of abrasion.
• the content of hard material particles can be chosen over a wide range up to the limit of the theoretical packing density of particles.
• the content of hard material particles is preferably 1 to 30% by weight, with these contents good mechanical properties of the polymer material are obtained. Particular preference is given to adding 5 to 20 parts by weight of hard material particles, in each case based on the polymer sliding material.
• the total content of reinforcing particles and hard material particles is preferably 2 to 50% by weight, more preferably 10 to 30% by weight, based on the polymer sliding material.
• the mixing ratio between reinforcing particles and hard particles is chosen according to the desired hardness, stiffness and strength values for the respective application.
• lubricants for example, graphite, polytetrafluoroethylene (PTFE), boron nitride and molybdenum disulfide (MoS 2 ) are suitable. Silicone oils are also suitable. Lubricants in the form of lubricating particles are preferably used.
• the average particle size (d 5 o) of the lubricating particles is preferably 1-50 ⁇ .
• Particularly preferred combinations of graphite and PTFE particles can be used as lubricant particles.
• the total content of lubricants is preferably 1 to 40% by weight, more preferably 10 to 30% by weight, based on the polymer sliding material.
• the total content of reinforcing particles, hard particles and lubricants should not be higher than 70% by weight.
• the total content of reinforcing particles, hard material particles and lubricants is preferably 3-70% by weight, more preferably 30-50% by weight, based on the polymer sliding material.
• the total content of the polymer matrix material is preferably 30-97% by weight, particularly preferably 50-70% by weight, based on the polymer sliding material.
• the proportion of the hard material particles in the total amount of hard material particles and reinforcing particles is preferably 20-90% by weight, particularly preferably 40-80% by weight.
• the proportion of the hard material particles in the total amount of hard material particles and lubricants is preferably 10 to 70% by weight, particularly preferably 25 to 60% by weight.
• the proportion of the reinforcing particles in the total amount of the reinforcing particles and lubricants is preferably 10 to 70% by weight, more preferably 25 to 45% by weight.
• a combination of carbon fibers, SiC submicron particles and lubricating particles are used as fillers for the polymer material according to the invention. Again, it is advantageous to use the preferred combination of graphite and PTFE particles as lubricating particles.
• the modulus of elasticity, i. the stiffness of the polymer sliding material according to the invention is preferably at least 7 GPa.
• the rotating seal ring and / or the stationary counter-ring of the mechanical seal according to the invention comprises the polymer sliding material according to the invention.
• the rotating seal ring and / or the stationary counter-ring of the mechanical seal according to the invention is made of the polymer sliding material according to the invention.
• the sliding partner of the sliding or counter-ring of the mechanical seal according to the invention comprising the polymer sliding material according to the invention, ie the stationary counter-ring or also the rotating slip ring, can be made of conventional mechanical seal materials, for example of ceramic, graphite, hard metal, metal or bronze.
• both the rotating seal ring and the stationary counter-ring are made of a polymer material, wherein preferably both rings are made of the polymer sliding material according to the invention become. As a result, the total cost of the mechanical seal can be further reduced.
• the rotating seal ring of the mechanical seal according to the invention is made of the polymer sliding material according to the invention.
• the sliding ring is made of the polymer sliding material according to the invention and the counter ring is made of steel. This embodiment is particularly suitable for oil and hydraulic applications.
• the sliding ring of the polymer sliding material according to the invention and the counter ring of a dense and fine-grained sintered ceramic, for example of aluminum oxide executed.
• a dense and fine-grained sintered ceramic for example of aluminum oxide
• SSiC sintered silicon carbide
• a suitable silicon carbide material is available under the name EKasic ® F at ESK Ceramics GmbH & Co. KG, he has a thermal conductivity of> 120 W / m * K.
• the sliding surface of the rotating sliding ring and / or the stationary counter-ring should preferably have a very high surface quality, ie low roughness values. It could be shown that friction coefficient and wear can be significantly reduced by reducing the roughness values on the sliding and / or counter ring.
• the sliding surface of the mating ring should preferably be made with low flatness deviation.
• the polymer sliding material according to the invention can be used permanently under dry running conditions.
• the polymer sliding material according to the invention can be used in addition to the application in a mechanical seal as positive displacement in wet and dry running pumps.
• Examples of displacement elements are slides in displacement pumps such as vacuum vane pumps and pressure plates in gear pumps.
• the polymer sliding material according to the invention can also be used as components in radial and thrust bearings.
• Displacer elements from the polymer sliding material according to the invention and mechanical seals according to the invention can be used in Rothwasserumskalz- pumps, drinking water pumps, cooling water circulation pumps for internal combustion engines and electric drives, compressor pumps for condensation cooling circuits, vacuum pumps for brake booster, positive displacement pumps for brake fluids (ESP and ABS systems), cooling what serum roller pumps for cooling Switch cabinets, hydraulic units and laser devices.
• the displacer elements of the polymer sliding material according to the invention can be used in addition to the dry running applications for applications in corrosive media such as alkalis and acids, solvents, oils, low-viscosity fats and brake fluids.
• the mechanical seal according to the invention is also suitable for sealing in electric motors, especially in small engines, if a permanent lubrication with oils, fats or other lubricating media is guaranteed.
• the polymer sliding material according to the invention is preferably processed via the thermoplastic injection molding process into components such as sliding and counter-rings of the mechanical seal according to the invention and displacement elements.
• mass-produced components can also be produced with high demands on complexity and functional integration.
• conventional methods are used in the prior art, for example, twin-screw extrusion.
• the hard material particles used can be agglomerated to improve the dispersing properties, for example by spray drying.
• the average size of the agglomerates is preferably 70-150 ⁇ .
• the agglomerates easily dissolve in the compounding with twin-screw extrusion under standard settings and allow an efficient extrusion process even at high contents of hard material particles of up to 30% by weight.
• Non-agglomerated hard material particle processing is not preferred for sub-micron particle sizes.
• Other methods known in the prior art for the production of polymer matrix materials can also be used for producing the polymer sliding material according to the invention.
• thermoplastic twin-screw extrusion By means of thermoplastic twin-screw extrusion, a filled polymer material is produced.
• the composition for compounding using a double screw extrusion is 60 wt .-% PEEK (Victrex ® PEEK 150), 10 wt .-% of graphite, 10 wt .-% of PTFE, 10 wt .-% carbon fibers and 10 wt .-% silicon carbide powder ,
• the silicon carbide powder has a purity of> 96% and an average particle size (d 5 o) of 150 nm.
• the silicon carbide powder is agglomerated by spray drying from aqueous suspension.
• the average agglomerate size of the spray-dried agglomerates is 100 ⁇ .
• the agglomerates easily dissolve in the compounding with twin-screw extrusion under standard settings and allow an efficient extrusion process.
• thermoplastic twin-screw extrusion By means of thermoplastic twin-screw extrusion, a filled polymer material is produced.
• the composition for compounding in double snow Cone extruder is 55% by weight PPS (Fortron 0203 from Ticona), 10% by weight graphite, 10% by weight PTFE, 10% by weight carbon fibers and 15% by weight silicon carbide powder.
• PPS Formtron 0203 from Ticona
• silicon carbide powder the agglomerated powder used in Example 1 is used.
• thermoplastic twin-screw extrusion By means of thermoplastic twin-screw extrusion, a filled polymer material is produced.
• the composition for compounding in the twin-screw extruder is 60% by weight of PESU (polyethersulfone, Ultrason E 1010, BASF), 10% by weight of graphite, 10% by weight of PTFE, 10% by weight of carbon fibers and 10% by weight.
• silicon carbide powder As the silicon carbide powder, the powder used in Example 1 is used.
• the dry running test is carried out in a ring-on-ring type test stand.
• rings of the material according to Example 1 are produced for the stator by mechanical processing of extruded rods.
• the rings have an outer diameter D a of 30 mm, an inner diameter Di of 20 mm and a height h of 16 mm.
• the sliding surface of the rings is finely polished, then the rings are inserted into the stator sample holder of the dry running test bench.
• a ring made of stainless steel 1.4713 with a finely polished surface is inserted into the sample holder for the rotor.
• the sliding surface of the stator is pressed pneumatically with a contact pressure of 0.2 MPa on the rotor sliding surface.
• the rotor rotates at 1000 rpm, which corresponds to an average sliding speed of 1.3 m / s.
• the stator is mounted rotatably and is held by a wire leading to a load cell, so that the transmitted frictional force can be measured.
• a thermocouple that measures the temperature history. From the measurement signal of the load cell, the coefficient of friction is calculated and plotted along with the temperature as a function of time.
• fReib [mm] mean radius of the friction surface.
• the temperature profile depends not only on the heat of friction introduced, but also on the thermal properties of the friction partners (heat capacity, heat conduction, heat flow into the sample and via the sample holder in the entire measuring apparatus).
• the temperature rises only slowly and then settles to a plateau value, this is indicated in Table 1 in the column “Remarks” by the indication "plateau value”. This behavior is observed in all the examples according to the invention.
• the temperature rises continuously until the test stand shuts down at a temperature of> 150 ° C.
• Table 2 is given for the examples of Table 1 their respective suitability for dry running, and distinguished for the emergency and continuous use.
• Example 4 was repeated, but the stator was made of the material according to Example 2.
• Example 4 was repeated, but the contact pressure and the sliding speed were varied according to Table 1.
• Example 5 The dry running test according to Example 5 was repeated, but the stator ring for the dry running test was produced from a material according to Example 1, but without the addition of submicron hard particles of silicon carbide. 10% by weight of graphite, 10% by weight of PTFE and 10% by weight of carbon fibers were used as fillers for the PEEK material (70% by weight PEEK).
• the experiment was stopped after 4.5 minutes, since the temperature at the stator was already 70 ° C and another such steep increase in temperature would lead to melting of the stator.
• Example 5 The dry running test according to Example 5 was repeated, but the stator ring for the dry running test was produced from a material according to Example 2, but without the addition of submicron hard particles of silicon carbide.
• Example 5 The dry running test according to Example 5 was repeated, but the stator ring for the dry running test was made of antimony-impregnated carbon graphite (EK3205, SGL Car- Bon). The contact pressure was 0.2 MPa and the sliding speed 1.3 m / s (as in Example 5, see Table 1).
• the temperature at the stator was after a test period of 60 minutes 120 ° C with further increasing course.
• the tested mechanical seal combination is not dry-run for continuous use.
• Example 8 The dry running test according to Example 8 was repeated, but the stator ring for the dry running test was produced from antimony-impregnated carbon graphite (EK3205, SGL Carbon). The contact pressure was 0.6 MPa and the sliding speed 3.9 m / s (as in Example 9, see Table 1).
• Example 6 Example 1 yes yes
• Example 7 Example 1 yes Yes

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Polymers & Plastics (AREA)
• Medicinal Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Emergency Medicine (AREA)
• Mechanical Sealing (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Lubricants (AREA)
• Compressor (AREA)
• Applications Or Details Of Rotary Compressors (AREA)
• Manufacture Of Macromolecular Shaped Articles (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=47901895

Family Applications (1)

Country Status (6)

Cited By (2)

Families Citing this family (14)

Family Cites Families (14)

• 2014
  • 2014-03-21 KR KR1020157029925A patent/KR20150133239A/ko not_active Withdrawn
  • 2014-03-21 JP JP2016503674A patent/JP2016519702A/ja active Pending
  • 2014-03-21 WO PCT/EP2014/055707 patent/WO2014147221A2/de not_active Ceased
  • 2014-03-21 CN CN201480017461.8A patent/CN105492516A/zh active Pending
  • 2014-03-21 EP EP14712276.6A patent/EP2976382A2/de not_active Withdrawn
  • 2014-03-21 US US14/778,668 patent/US20160122682A1/en not_active Abandoned

Also Published As

Similar Documents

Legal Events