485 results about "Viton" patented technology

An integral gasketed filtration cassette structure of a type comprising a filtration cassette fully or partially overcoated by a gasket layer, forming a fluid-tight seal between the filtration cassette and the filtration cassette holder to which the filtration cassette is to be affixed. The filtration cassette comprises filter sheets arranged in a multilaminate, peripherally bonded array, wherein the filter sheets alternate with permeate and retentate sheets. The gasket layer comprises an elastomeric material with suitable hardness and temperature resistance for sealing, such as silicone, ethylenepropylenedienemonomer (EPDM), viton, polyurethane, polypropylene, polyethylene, polyvinylchloride, polyester, epoxy, ethylvinylacetate, bunnas, and styrene butadiene. The filtration cassettes and filter of the invention may be advantageously employed for dewatering of aqueous biomass suspensions, desalting of proteins, removal of secreted metabolites from cellular suspensions, and the like.

The invention discloses raw paper of a high-performance environment-friendly paper based friction material and a manufacturing method of a friction plate. The high-performance environment-friendly paper based friction material is characterized by comprising the following components in percentage by weight: a substrate comprises 7-15% of carbon fiber, 5-10% of chopped aramid fiber, 5-10% of aramidpulp and 9-30% of bamboo fiber pulp; a friction agent comprises 10-20% of kieselguhr and 8-12% of cashew nut shell powder; a frictional property regulator adopts 2-4% of rubber particles, 5-10% of calcium carbonate and 10-15% of flake graphite; and a forming adhesive comprises 1-2% of fluororubber, 3-15% of silicone resin and 3-15% of phenolic resin. The invention fully forms the materials of thefriction material into a whole by changing the traditional impregnation process, effectively improves the physical and mechanical properties of the friction plate, improves the friction factors, regulates the dynamic and static friction ratio factors, and reduces the abrasion ratio of the friction plate.

A thermoplastic, moldable, millable, extrudable composition of matter involving at least three polymeric components: a fluoroelastomer, an ETFE (ethylene/tetrafluoroethylene alternating copolymer, which may optionally contain one or more comonomers in minor amounts to alter crystallinity and melting temperature) fluoroplastic, and a block fluoropolymer containing at least one fluoroelastomer block and at least one ETFE block. The fluoroelastomer component and optionally the fluoroelastomer portion of the block fluoropolymer are crosslinked in a dynamic vulcanization process. Also disclosed are multilayer articles in which the aforesaid fluoro-TPV is adhered to an ETFE plastic layer. These bonded multilayer objects may include injection-molded parts that are either co-injected with both ETFE and fluoro-TPV layers, or insert molding jobs in which a previously molded ETFE insert is placed into a mold and surrounded by fluoro-TPV; and also multilayer co-extruded products such as hoses in which a fluoro-TPV layer is extruded against an ETFE layer.

The invention discloses leather cup rubber for a laundry machine. The leather cup rubber is prepared from the following raw materials in parts by weight: 30-40 parts of nitrile rubber, 20-30 parts of chlorosulfonated polyethylene rubber, 20-40 parts of ethylene propylene terpolymer 5962 (LANXESS Deutschland), 10-15 parts of fluorine rubber, 3-5 parts of natural rubber, 20-30 parts of high abrasion furnace black N330, 10-15 parts of modified white carbon black, 3-4 parts of zirconia, 8-10 parts of modified wood ash, 4-6 parts of attapulgite, 4-6 parts of meerschaum, 9-11 parts of modified iron tailing slag powder, 0.5-1 part of stearic acid, 0.5-1 part of isocyanate, 0.2-0.4 part of accelerant DM, 0.3-0.6 part of accelerant BZ, 1-2 parts of stearic acid, 2-4 parts of zinc oxide, 0.2-0.4 part of ferrocene, 1-2 parts of polyethylene wax, 1-2 parts of antioxidant DSTP, 1-2 parts of anti-aging agent NBC, 2-3 parts of gamma-methacryloxypropyl trimethoxysilane and 16-18 parts of triethyl citrate. The rubber disclosed by the invention has excellent ozone resistance, excellent low temperature resistance and heat resistance and is large in operating temperature range and environment-friendly in process, so that the rubber can be used for preparing various packing materials.

The invention relates to a seal ring rubber material and a mixing method thereof. The mixing method comprises the following steps: carrying out crude rubber laminating and roller covering: adding 1-1.5 parts of aflux-42 serving as a processing agent and 1.5-2 parts of TM-80 serving as a mould release agent into 100 parts of fluororubber serving as crude rubber; mixing the above components of the rubber material for about 1 minute at the roller temperature of 40-45 DEG C, and adding 4-6 parts of activated magnesia serving as an acceptor; evenly mixing, adding 30-40 parts of a reinforcing agent which contains aramid pulp fiber; evenly mixing once again, adding 1-1.5 parts of bisphenol AF serving as a vulcanizing agent and 1-0.5 part of tert-butyl peroxypivalate (BPP) serving as an accelerator; and finally adding 5-7 parts of calcium hydroxide, packaging into a cornucopla for three or four times after all compounding ingredients are consumed up under the roller temperature of below 55 DEG C, adjusting the roller distance to be less than 0.55mm, rolling the dropped rubber for five or six times, and discharging. The seal ring rubber material has the advantages of rapid vulcanization speed of fluororubber, high production efficiency and low rejection rate.

The invention discloses a silicone rubber insulating fluororubber cable material and a preparation method thereof. The silicone rubber insulating fluororubber cable material comprises the following raw materials in parts by weight: 90-100 parts of methyl vinyl silicone rubber, 20-30 parts of magnesium hydroxide, 40-60 parts of SBS (Styrene Butadiene styrene), 50-60 parts of ethylene-vinyl acetate copolymer, 20-30 parts of polytetrafluoroethylene, 1-4 parts of precipitated white carbon black, 60-80 parts of light calcium carbonate, 2-4 parts of 2,4-dichlorobenzoyl, 3-5 parts of accelerant DM, 3-6 parts of 2-thiolbenzimidazole, 1-3 parts of cross-linking agent TAC, 2-4 parts of calcium stearate, 2-4 parts of antioxidant DSTP, 1-5 parts of stearoyl-rac-glycerol, 2-5 parts of stearic acid and 10-20 parts of ammonium polyphosphate. According to the invention, the preparation method is simple, the electric performance is superior, the formula of the raw materials is rational, and the prepared cable material is environment-friendly, has the advantages of softness, wear resistance, watertightness and the like, and passes the A-level fire resistance test in China.

The invention belongs to the technical field of materials and relates to a rubber blending modification technology. Due to the introduction of vinyl-terminated poly(trifluoropropyl) siloxane to the main chain of fluorine rubber, the compatibility of fluorine rubber and fluorosilicone rubber can be improved, and due to the reduction of the viscosity difference between fluorine rubber and fluorosilicone rubber, the blending uniformity of fluorine rubber and fluorosilicone rubber can be improved. A fluorine rubber and fluorosilicone rubber blend provided by the invention at least comprises main rubber consisting of fluorine rubber and fluorosilicone rubber, a compatibilizer and a fluorine rubber viscosity modifier, wherein the fluorine rubber accounts for 10-50% in the main rubber, the compatibilizer is fluorine rubber grafted vinyl-terminated poly(trifluoropropyl)siloxane, the use amount of the compatibilizer is 2-20% of that of the main rubber, and the use amount of the fluorine rubber viscosity modifier is 30-45% of that of fluorine rubber. The fluorine rubber and fluorosilicone rubber blend is prepared by adopting a high-temperature vacuum blending process, has good high-temperature resistance and good medium resistance and low compression set, can be applied to the technical field of processing of sealing products and damping parts and can be particularly applied to the fields with oil resistance.

The laminate of the invention comprises a sliding member of a resin composition and a Substrate layer of a thermoplastic olefin elastomer (A), and is obtained by co-extruding: the resin composition which is obtained by melt kneading a thermoplastic olefin elastomer (A), an ultra-high-molecular weight polyolefin (except a powder thereof having a particle diameter of 1 to 100 mum) having an intrinsic viscosity, as measured in a decalin solvent at 135° C., of 1 to 40 dl/g, an inorganic or organic filler powder, and optionally, a polyolefin resin, an organopolysiloxane, a fatty acid amide and a fluororubber in a twin-screw extruder, and the thermoplastic olefin elastomer (A). The laminate has excellent sliding properties with window glass and excellent abrasion resistance. Moreover, the laminate can be produced by a simple process because it requires no adhesive, and the laminate has great bonding strength between the substrate layer and the sliding member layer.

The invention relates to a thermostable viton gasket, which is mainly used as sealing element in plate exchanger using high temperature steam and heating oil. The viton gasket comprises 70-75 wt% of F26 ready-mixed glue and 25-30 wt% of HNBR ready-mixed glue. Said F26 ready-mixed glue comprises 100 wt% of 26-style rubber, 2-2.2 wt% of hexaflurate bisphenol A and so on. HNBR ready-mixed glue comprises 100 wt% of hydrogenated rubber, 48-52 wt% of black pigment and so on. The invention can resist high temperature steam and oil.

The preparation process of the metal sealing filling piece with the fluorine rubber coat used in gas engine is provided in invention. The coat is made up of the 100 parts of the 26 type fluorine raw rubber, 250-350 parts of the mixing solvent, the 25-35 parts of the carbon black, 1.5-3 parts of the KH-560 silane resin acceptor, 30-50 parts of the 3# vulcanized agent, 5-15 parts of the MgO, 3-7 parts of the phenyl-methyl polysiloxane resin and 3-7 parts of Supramoly. The advantage of the invention is: (1) the process batch formula is proper and the dope has good flow level; (2) it needn't the bottom coating; (3) it can use the flame plating or screen printing process to operate on the fluorine rubber.

The invention provides an oil resistant rubber material. The oil resistant rubber material comprises the following components in parts by weight: 60-70 parts of butadiene-acrylonitrile rubber, 25-35 parts of fluororubber, 5-10 parts of dioctyl tin maleate, 2-3 parts of glass fibers, 1-2 parts of stearic acid, 0.5-0.8 part of light calcium carbonate, 3-5 parts of magnesium dimethacrylate, 2-3 parts of drying oil alkyd resin, 1-2 parts of paraffin, 3-5 parts of dilauryl thiodipropionate, 1-2 parts of diacetyl peroxide, 0.8-1.2 parts of zinc oxide, 8-10 parts of aluminium oxide, 6-8 parts of white carbon black, 0.8-1.5 parts of anti-aging agent and 1-3 parts of sulfur. The invention also provides a preparation method of the oil resistant rubber material. The oil resistant rubber material has good sealability, high temperature resistance and oil resistance and is suitable for sealing automobile gearboxes.

To provide a fluorine-containing rubber composition comprising (a-1) a non-perfluoro fluorine-containing rubber and (b-1) a fluorine-containing multi-segment polymer comprising an elastomeric fluorine-containing polymer chain segment and non-elastomeric fluorine-containing polymer chain segment, in which structural units of each of the elastomeric fluorine-containing polymer chain segment and the non-elastomeric fluorine-containing polymer chain segment comprise not less than 90% by mole of a perhalo olefin unit. The fluorine-containing rubber composition is capable of providing a clean sealing material for semi-conductor production apparatuses without using a filler.

The invention discloses a leather cup rubber material for a brake of an automobile. The leather cup rubber material is prepared from the following raw materials in parts by weight: 40-50 parts of nitrile rubber, 20-30 parts of chlorosulfonated polyethylene rubber, 10-30 parts of ethylene propylene terpolymer 5962 (LANXESS Deutschland), 10-15 parts of fluorine rubber, 3-5 parts of natural rubber, 30-40 parts of high abrasion furnace black N330, 15-20 parts of modified white carbon black, 3-4 parts of graphite, 8-10 parts of modified wood ash, 4-6 parts of vermiculite, 4-6 parts of quartz sand, 9-11 parts of modified iron tailing slag powder, 0.5-1 part of stearic acid, 0.5-1 part of sulfur, 0.2-0.4 part of accelerant DM, 0.3-0.6 part of accelerant BPP, 1-2 parts of stearic acid, 2-4 parts of zinc oxide, 0.2-0.4 part of ferrocene, 1-2 parts of lignite wax, 1-2 parts of antioxidant DSTP, 1-2 parts of anti-aging agent RD, 2-3 parts of phenyl triethoxysilane and 16-18 parts of acetyl triethyl citrate. The rubber material disclosed by the invention has excellent ozone resistance, excellent low temperature resistance and heat resistance and is large in operating temperature range and environment-friendly in process, so that the rubber material can be used for preparing various packing materials.

The invention belongs to the field of organic compound processing, and provides a mixture for automobile high-speed rotation oil seals, which is prepared from the following components in parts by weight: 100 parts of fluororubber, 1.5-2.5 parts of bisphenol AF, 0.4-0.8 part of accelerator BPP, 2-5 parts of active magnesium oxide, 4-10 parts of calcium hydroxide, 0-50 parts of carbon black, 5-50 parts of calcium silicate, 0-50 parts of hexagonal boron nitride, 0-20 parts of carbon nanotube and 1-3 parts of mold release agent. By adopting the fluororubber F246 (the Mooney viscosity is 100-150) as the base unvulcanized rubber and optimizing the formula system, the physical and mechanical properties of the vulcanized fluororubber of the original formula are basically unchanged. The two different types of heat-conducting fillers are compounded to enhance the heat conductivity coefficient of the compounded rubber under the synergic actions, and the heat-conducting property of the vulcanized rubber product for manufacturing is obviously enhanced.

The invention discloses a fluorine-containing elastomer with excellent low temperature and liquid resistance and a preparation method thereof. The elastomer is prepared by thermally kneading and mixing the following components in parts by weight: 100 parts of fluororubber, 0-30 parts of acid absorbent, 0-35 parts of calcium hydroxide, 0-50 parts of reinforcing filler, 0-10 parts of plasticizer, 0.5-5 parts of vulcanizing agent, 0-5 parts of organic wax, 0.2-2 parts of accelerant, 1-30 parts of fluorosilicone alkane ester and 1-10 parts of multifunctional additive LCA. The fluorine-containing elastomer and the preparation method, which are provided by the invention, have the beneficial effects that the preparation method is simple and practicable and is lower in production cost; by adding fluorosilane ester to the components of the fluorine-containing elastomer and simultaneously matching fluorosilane ester with the multifunctional additive LCA, the low temperature brittleness temperature of an existing fluororubber compound is better decreased (Tg of the fluorine-containing elastomer can be reduced by about 5-10 DEG C) after the existing fluororubber compound undergoes primary or secondary vulcanization; meanwhile, the effects on the liquid resistance of the fluororubber are very small, so that the fluororubber can be more widely applied.

The invention provides a modified fluororubber rubber compound and a preparation method thereof. The fluororubber takes modified binary fluororubber as a raw material; meanwhile, two vulcanization agent manners including a bisphenol vulcanization system and a peroxide vulcanization system are combined to carry out vulcanization; an auxiliary agent is increased and matched, and is mixed with the material to prepare the modified fluororubber rubber compound. The modified fluororubber rubber compound has excellent high heat resistance, cold resistance, low permeability and fuel oil resistance, and is applicable to industries including aerospace, aviation, cars, metallurgy, petrochemical engineering, electronics and the like; the performance on a sealing application is not too low and a problem caused by that an application environment is changed is not caused; the modified fluororubber rubber compound can be used as the first choice of a sealing material.

The invention discloses a rubber material for a prestressing jack sealing ring. The rubber material is formed by mixing a rubber material A and a rubber material B in an equal ratio, wherein the rubber material A consists of the following raw materials in part by weight: 95 to 105 parts of polyurethane rubber, 7 to 9 parts of silicone rubber, 4 to 6 parts of fluororubber, 3 to 4 parts of ethylenepropylene rubber, 0.7 to 0.9 part of natural rubber, 0.3 to 0.5 part of sulfur, 0.4 to 0.6 part of zinc oxide, 0.3 to 0.5 part of stearic acid, 1 to 2 parts of antioxidant 4010NA, 3 to 4 parts of paraffin, 62 to 65 parts of highly wear-resistant carbon black N330, 18 to 22 parts of dioctyl phthalate (DOP), 25 to 35 parts of aluminum hydroxide and 1 to 2 parts of accelerator PZ; and the rubber material B consists of the following raw materials in part by weight: 82 to 87 parts of unary homopolymer of chlorohydrin rubber, 12 to 18 parts of copolymer of chlorohydrin rubber, 1 to 2 parts of zinc stearate, 1 to 3 parts of antioxidant RD, 0.4 to 0.6 part of gum-easy T-78, 1 to 2 parts of rhein wax, 45 to 55 parts of carbon black, 10 to 14 parts of barium sulfate, 5 to 8 parts of DOP, 4 to 6 parts of lead trioxide, 0.4 to 0.6 part of sulfur and 1 to 2 parts of accelerator Na-22. The sealing ring prepared from the rubber material has high oil resistance, heat resistance, air tightness, flame retardance and tear resistance and is low in material cost.

The invention discloses an automobile fuel oil evaporative rubber tube with a composite structure and a manufacturing method for the automobile fuel oil evaporative rubber tube. The rubber pipe consists of an inner tube rubber layer made of fluororubber containing a bisphenol vulcanizer, magnesium oxide, calcium hydroxide, carbon black and a promoter and an outer tube rubber layer made of epichloro-hydrin rubber containing a vulcanizer, the carbon black, a plasticizer, the magnesium oxide and an anti-aging agent, and the inner tube rubber layer and the outer tube rubber layer are glued integrally and extruded in a composite mode by a composite extruding machine. The manufacturing method comprises the following steps of: mixing sizing materials of an inner tube and an outer tube in an internal mixer, passing through an open mill thinly, extruding a rubber tube blank from the composite extruding machine in a composite mode, cutting under the condition of a fixed length, vulcanizing by an evaporative cylinder, performing two-section vulcanization, cutting a head under the condition of the fixed length, and cleaning to obtain the evaporative rubber tube. The manufacturing method has an advanced process and high production efficiency and is low is manufacturing cost; and a finished product is low in fuel oil permeability, resistant to heat, aging and negative pressure and environment-friendly, and can meet the requirements of vehicular assembly.

A multi-layer tube (1) which comprises a base tube (3) and a coating layer (2) laminated on the inner surface of the base tube (3). The base tube (3) is made of a fluororubber type thermoplastic elastomer composed of rubber phase and a crystalline phase and has a hardness of HDA 40 or more and HDA 70 or less as measured according to JIS K 7215. The coating layer (2) is made of a blend of the above fluororubber type thermoplastic elastomer with a (vinylidene fluoride)-(hexafluoropropylene)-(tetrafluoroethylene) tenary copolymer and has a hardness of HDA 70 or more and HDD 80 or less as measured according to JIS K 7215.