35results about How to "Improve high temperature aging resistance" patented technology

The invention relates to a high-temperature wear-resisting ceramic composite fiber brake block which is manufactured by processing framework materials and auxiliary materials through material mixing, mould pressing, hot press molding and solidification procedures, wherein the framework materials comprise bismaleimide modified phenolic resin, short aramid fiber, high-purity ceramic fiber, potassium titanate fiber, mineral fiber, barium titanate and nickel; the auxiliary materials comprise molybdenum sulfide and / or tin sulfide, graphite and / or coke, acrylonitrile-butadiene rubber, mica, zinc oxide, stearic acid, barium sulfate and 4010-type antiager. The high-temperature wear-resisting ceramic composite fiber brake block solves the problems existing in the prior brake blocks, can well avoid high-speed decay and high-temperature decay, has the advantages of being good in staibility and long in service life, and is a high-temperature wear-resisting ceramic composite fiber brake block which is low in noise, high in intensity and low in pollution.

The present invention discloses a high-temperature-resistant ultraviolet-resistant epoxy resin prepolymer comprising the following components: 20-50wt% of epoxy resin, 40-60wt% of an anhydride curing agent, 1-15wt% of a polyol, 0.1-2wt% of a coupling agent and 0.1wt%-5wt% of an antioxidant; a preparation method of the high-temperature-resistant ultraviolet-resistant epoxy resin prepolymer is as follows: after the epoxy resin and the antioxidant are evenly mixed, the anhydride curing agent and the coupling agent are added, when the reaction system is cooled to 40 DEG C-80 DEG C, the polyol is added for ring opening reaction with anhydride to obtain a carboxylic compound, and the carboxyl compound is reacted with the epoxy resin to obtain the epoxy resin prepolymer. Advantages of the high-temperature-resistant ultraviolet-resistant epoxy resin prepolymer are that: the high-temperature-resistant ultraviolet-resistant epoxy resin prepolymer has excellent high-temperature aging resistance and ultraviolet resistance, and the preparation method is simple, raw materials are easily available, the process is controllable, industrial production is easy, and the high-temperature-resistant ultraviolet-resistant epoxy resin prepolymer can be widely used in electronic device packaging materials, coatings and adhesives and other field.

The invention discloses an automobile ternary catalytic converter. The automobile ternary catalytic converter comprises a honeycomb ceramic carrier, and a catalyst used for coating the honeycomb ceramic carrier. The automobile ternary catalytic converter is of a double-layer structure; the internal layer is a Pd layer catalyst converter, the external layer is a Rh catalytic layer used for coatingthe Pd layer catalyst converter; the Pd layer catalyst converter is composed of the honeycomb ceramic carrier and a Pd catalyst layer used for coating the honeycomb ceramic carrier; the Pd catalyst layer is prepared via mixing of a ceria-zirconia composite oxide, modified Al2O3, a molecular sieve, and precious metal Pd; the Rh catalyst layer is prepared via mixing of the ceria-zirconia composite oxide, modified Al2O3, a molecular sieve, and precious metal Rh. The double-layer structure is adopted by the automobile ternary catalysis converter, so that the high temperature and aging resistance of the automobile ternary catalysis converter are improved, the probability of activator failure caused by alloy formed among metal is reduced, the Rh layer on the external surface is beneficial for preferential adsorption conversion of NOx, increasing of NOx conversion efficiency, and reducing NOx discharge.

The invention discloses an integral diesel vehicle tail gas oxidization catalyst and a preparation method thereof. The preparation method comprises the following steps: loading noble metal on a SiO2-Al2O3 carrier modified by an auxiliary agent to obtain a catalyst powder material; and coating a cordierite matrix with the catalyst powder material to prepare the integral diesel vehicle tail gas oxidization catalyst, wherein the mass percent content of SiO2 in the carrier is 10 to 30 weight percent, noble metal is Pt and/or Pd and the total loading amount is 1 to 3 weight percent. The SiO2-Al2O3carrier is prepared by modifying through auxiliary agents including rare earth metal, alkaline earth metal and the like; and a DOC (Diesel Oxidation Catalyst) prepared from the carrier can be used forimproving the activity of CO, HC, SOF and NO and high-temperature ageing resisting performance, especially the NO oxidation activity.

Provided is an annular adhesive synthesizing method. The method comprises the steps of: adding 40-60 parts of triallyl isocyanurate and 0.0015-0.0040 parts of platinum catalyst into a three-necked flask; at the 65-80 DEG C reaction temperature, slowly dropping 17-28 parts of 1,1,3,5,5-pentamethyl-3-phenyl trisiloxanes into the three-necked flask,and finishing the dropping within 0.5 hours; and stirring and reacting the mixture for 3-4 hours; adding 21-33 parts of trimethoxysilane into the three-necked flask and finishing the dropping within 0.5 hours; continuing the stirring and reaction for four hours; and then stopping the reaction; and removing low boiling materials by performing distillation at a reduced pressure. 6-9 parts of activated carbon are added into the substance, stirring and adsorbing are performed for 12 hours, and the annular adhesive is obtained after the material is filtered.

The invention provides a pavement structure of a steel bridge deck and a construction method thereof. the pavement structure of the steel bridge deck comprises a first waterproof bonding layer, a modified epoxy asphalt macadam layer, a second waterproof bonding layer and an ultra-high performance structural layer which are sequentially paved on the surface of a steel plate of the steel bridge deck; the ultra-high performance structural layer is a pavement structural layer taking polymer modified asphalt as an adhesive, or comprises a pavement structural layer taking the polymer modified asphalt as the adhesive and a third waterproof bonding layer; the second waterproof bonding layer and the third waterproof bonding layer are the layers formed by at least one material of epoxy emulsified asphalt, polymer modified asphalt and polymer modified emulsified asphalt. The pavvement structure of the steel bridge deck provided by the invention has better resistance and stability.

The invention relates to a high-temperature submersible oil pump cable and a manufacturing process thereof, and belongs to the technical field of submersible oil pump cables for an oil field. The technical solution is that the high-temperature submersible oil pump cable comprises a conductor (1), an ethylene propylene insulating layer (2), a lead sheath (3), an isolating layer (4) and a steel-tape armor layer (5), where the ethylene propylene insulating layer which is ethylene propylene diene monomer is extruded outside the conductor; the surface of the conductor is coated with a binder at a temperature-resist grade of 232 DEG C before the ethylene propylene diene monomer is extruded; special ethylene propylene diene monomer is adopted; after the ethylene propylene insulating layer is extruded outside the conductor, highly anti-corrosive alloy lead is extruded outside to serve as the lead sheath; a high-temperature resistant adhesive tape is wound on the surface of the lead sheath to serve as the isolating layer to form a core wire; and three core wires are arranged in line and are coated with a linked steel tape outside which serves as the steel-tape armor layer, thus, the production of the cable is completed. According to the invention, the special ethylene propylene diene monomer is taken as the ethylene propylene insulating layer, so that the high-temperature resistant and anti-aging performance of the cable are improved; the continuous working temperature of the conductor is as high as 232 DEG C; and the ethylene propylene insulating layer is bonded with the conductor into a whole at a high temperature.

The invention relates to a preparation method of a CHA molecular sieve SCR monolithic catalyst. The preparation method is characterized by comprising the following steps of 1 CHA molecular sieve aqueous solution preparing; 2 adhesive preparing, wherein Al sol and Si Sol are prepared, mixed and stirred to be uniform at uniform velocity, and then the mixture is aged for 1-3 h to obtain an adhesive; 3 viscosity controlling, wherein the CHA molecular sieve aqueous solution and the adhesive are mixed to prepare molecular sieve coating size with the needed solid content, the molecular sieve coating size is stirred for 1-3 h, the viscosity of the molecular sieve coating size is tested and regulated to be 100-1,000 cP by regulating the pH value; 4 carrier coating, wherein after carrier coating is conducted, the surplus molecular sieve coating size is blown out, dried and then calcined for 2-3 h after the temperature is increased to 500 DEG C to 650 DEG C at the temperature increasing speed of 3-5 DEG C/min. According to the preparation method, a preparation technology of the CHA molecular sieve monolithic catalyst is greatly simplified, the size stability is improved, the size viscosity is easily controlled, and therefore the size can adapt to multiple coating processes.

The invention discloses a preparation method of a heat-resistant auxiliary agent for temperature-resistant insulating paper. The method comprises the following steps of: compounding enclosed waterborne polyurethane and a nitrogen-containing compound to prepare a heat-resistant auxiliary agent, and applying the heat-resistant auxiliary agent to the surface of the insulating paper through a coating, spraying or dipping method. According to the invention, a deblocking reaction can be carried out by utilizing a blocking group of blocked waterborne polyurethane, an isocyanate group with strong reaction activity is exposed again, and the isocyanate group and hydroxyl on fibers are subjected to a chemical reaction to form a three-dimensional network structure, so that the bonding points and the bonding strength among the fibers are increased, and the high-temperature aging resistance of the insulating paper is obviously improved. The insulating paper prepared by adding the heat-resistant additive has excellent high-temperature aging resistance, the high-temperature aging resistance is improved by 22-27% under the same condition, and the insulation performance of a transformer system is not influenced.

The invention discloses a high-temperature-resistant polyvinyl chloride pipe, which is prepared from the following raw materials in parts by weight: 40-50 parts of polyvinyl chloride, 15-24 parts of methyl vinyl silicone rubber, 1-2 parts of 1, 3-bis (tert-butyl peroxy isopropyl) benzene, 0.2-0.8 part of N-cyclohexyl-2-benzothiazolesulfenamide, 1-2 parts of zinc oxide, 40-50 parts of a filling reinforcing agent, 1-3 parts of magnesium oxide, 1-2 parts of carboxymethyl cellulose, 1-3 parts of an anti-aging agent, 1-2 parts of poly-metaphosphoric acid and 3-6 parts of a plasticizer. The high-temperature-resistant polyvinyl chloride pipe provided by the invention has high temperature aging resistance, thus being used for a long time at the temperature of 230 DEG C and better maintaining the physical properties at the temperature of 280 DEG C; the high-temperature-resistant polyvinyl chloride pipe has ultra-low compression permanent deformation, thus achieving the effect of effective sealing in a using process.

The invention relates to the technical field of silica gel products, and particularly discloses high-temperature-resistant silica gel for a high-temperature roller and a preparation method thereof. The high-temperature-resistant silica gel is prepared from the following raw materials in parts by weight: 40-55 parts of methyl vinyl silicone rubber; 15-20 parts of fumed silica; 2-5 parts of hydroxyl silicone oil; 2.5-7 parts of a silane coupling agent; 0.5-2 parts of hydrogen-containing silicone oil; 0.03-0.2 part of zinc stearate; 20-45 parts of a high-temperature-resistant filler; and 3-9 parts of rare earth oxide. The preparation method comprises the following steps: stirring and kneading the methyl vinyl silicone rubber, the hydroxyl silicone oil, the silane coupling agent and the hydrogen-containing silicone oil for 5-10 minutes to obtain a mixture, mixing the fumed silica, the zinc stearate and the high-temperature-resistant filler, adding the mixture into the mixture in 4-5 times, heating to 180 DEG C after charging, adjusting the vacuum degree to -0.09 to -0.1 MPa, stirring for 2-4 hours, and after stirring and cooling to 40-50 DEG C, adding rare earth oxide, stirring and kneading for 0.5-1 hour, and sub-packaging by using a 200-mesh filter screen. The high-temperature-resistant silica gel can be used in the industries of silica gel rollers and gold stamping wheels, and has the advantages of high temperature aging resistance and high degradation resistance.

The invention relates to the technical field of PVC materials, in particular to a high-temperature-resistant high-pressure-resistant hose which sequentially comprises an outer layer, a second winding layer, a middle layer, a first winding layer and an inner layer from outside to inside, and the inner layer is prepared from the following raw materials in parts by weight: PVC, a plasticizer, a polymer of dipentaerythritol and sebacic acid, a high-temperature-resistant stabilizer, tackifying resin and a lubricant. The production process of the high-temperature-resistant high-pressure-resistant hose comprises the following steps of preparation of a first material, preparation of a second material, extrusion molding of an inner layer, preparation of a first winding layer, extrusion molding of a middle layer, preparation of a second winding layer and extrusion molding of an outer layer. By adding the polymer of dipentaerythritol and sebacic acid, the toughness, mechanical strength and high-temperature aging resistance of the inner layer are improved. The pH value is adjusted to be less than 3 so that the toughness of the inner layer is further improved, and the inner layer is convenient to bend. Tthe heat resistance of the inner layer is improved by adding the heptadecenoic acid triglyceride.

The invention belongs to the technical field of cables, and discloses a high-temperature fire-resistant watertight insulating rubber for a cable applied to safe return of a ship to a port, and a manufacturing method of the high-temperature fire-resistant watertight insulating rubber. The rubber comprises the following raw material components in parts by weight: 20 parts of methyl vinyl silicone rubber 110-3-B, 20 parts of EPDM (ethylene propylene diene monomer) Mitsui EPT 4045M, 0.6 to 1 part of bis(tert-butylperoxyisopropyl)benzene (BIPB), 0.2 to 0.3 part of trimethylolpropane trimethacrylate (LS-3-80); 0.4 to 0.6 part of an amine aldehyde compound anti-aging agent XH-3, 0.2 to 0.4 part of 2-mercapto benzimidazole (MBI), 5 to 9 parts of white carbon black having undergone gas-phase-method surface treatment, 4 to 8 parts of low-temperature low-melting-point glass powder with a softening temperature of 400-700 DEG C, 4 to 8 parts of high-temperature low-melting-point glass powder with a softening temperature of 600-1100 DEG C, 0.5 to 1.5 parts of iron sesquioxide, 0.4 to 1 part of diphenylsilanediol and and 0.1 to 0.2 part of SI69-50. The manufacturing method comprises the following steps: firstly, carrying out two-side mixing operation in an open mill, then adding the methyl vinyl silicone rubber 110-3-B and the raw rubber of EPDM Mitsui EPT 4045M, conducting mixing for 2-3 minutes, then sequentially adding other components, carrying out mixing for 7-8 minutes, performing discharging, conducting extruding and granulating on a double-screw granulator, and preforming cooling for separate use.

The invention discloses a modified asphalt waterproof coating material, which is prepared from the following raw materials in parts by weight: 100-120 parts of modified asphalt emulsion, 25-30 parts of butadiene styrene rubber, 10-13 parts of desulfurization powder, 20-25 parts of a softener, 10-15 parts of a tackifier, 5-8 parts of a plasticizer, 25-30 parts of a thickener and 3-5 parts of a defoamer. In a waterproof coating material preparation process, the modified asphalt emulsion is prepared, wherein through montmorillonite and carbon nanotubes, the phase angle of asphalt is increased, the complex modulus is increased, the rutting factor is increased, and the high-temperature rutting resistance of the asphalt is improved, so that the high-temperature rutting resistance of the asphaltis further improved, the thermal aging resistance of the waterproof coating material is improved, and the aging resistance of the waterproof coating material is improved due to the fact that the montmorillonite and the carbon nanotubes have good aging resistance,.

The invention discloses a high-temperature ageing resisting PA (Polyamide) material and a preparation method thereof. The high-temperature ageing resisting PA material is prepared from the following components in percentage by weight: 60 percent to 70 percent of PA66, 5 percent to 10 percent of PA6, 0.5 percent to 1 percent of an anti-ageing agent, 0.4 percent to 1 percent of a lubricant and 20 percent to 30 percent of glass fiber. The high-temperature ageing resisting PA material is compounded with the multi-element anti-ageing agent, so as to realize a long-period high-temperature ageing resisting effect, so that a product can be used for a long period at 160 DEG C, and the high-temperature ageing resisting time reaches 3000 hours.