31results about How to "Good high temperature aging resistance" patented technology

The invention discloses a three-way catalyst for improving the processing effect of hydrocarbons (HC) in the tail gas of a lean-burn engine and being capable of purifying carbon monoxide (CO) and nitrogen oxide (NO) and a preparation method thereof. The catalyst contains oxides of cerium, zirconium, barium and copper, wherein the mol ratio of the cerium to the zirconium to the barium to the copper is (2-15):(5-40):1:(0.5-1.5). Water-soluble cerate, zirconium salt and barium salt form an aqueous solution composition which is dropwise added into precipitator aqueous solution; solid substances are dried, ground and roasted at a temperature between 500 DEG C and 800 DEG C to obtain cerium-zirconium-barium oxide; the cerium-zirconium-barium oxide is impregnated into copper slat aqueous solution; and the mixture is dried and roasted at a temperature between 500 DEG C and 650 DEG C to obtain the catalyst. The invention can reduce the catalytic oxidation temperature of HC, has better high-temperature and ageing resistant performances and can be used for an exhaust system of the lean-burn engine to eliminate the pollution of HC, CO and NO on the environment.

The invention proposes a temperature-resistant and salt-resistant multi-component copolymerized pre-crosslinked gel particle and its preparation method and application, which belong to the technical fields of petroleum exploitation, transportation and chemical industry. The pre-crosslinked gel particles provided by the present invention are formed by the copolymerization of acrylamide and 2-acrylamide-2-methylpropanesulfonic acid. The copolymer has a stable structure, good high-temperature aging resistance, is not easy to hydrolyze, and has good contact with polymers. The compatibility of the system greatly increases the viscosity of the system, improves the suspension performance of the pre-crosslinked gel particles in the system, and makes the oil displacement capacity of the system stronger and the oil displacement efficiency higher.

The invention discloses an amine-based curing agent, a high-temperature-resistant epoxy resin containing the curing agent, a preparation method and an application thereof. The amine-based curing agent has a structure shown in the following formula (C): the raw materials for the preparation of the epoxy resin include an epoxy resin matrix and an amine-based curing agent, and the amine-based curing agent includes a carboryl group and two amine groups , the two amine groups are respectively the end groups of the amine-based curing agent, the amine groups are directly connected to the carborane group, or the amine groups are respectively connected to the carborane group through an aromatic hydrocarbon structure, a silicon group or a siloxy group. The cured epoxy resin has good bonding strength at room temperature and can be used at a high temperature of 600°C. The epoxy resin is suitable as a high temperature resistant adhesive and a resin matrix of a high temperature resistant coating.

The invention aims to disclose a composite aluminium, cerium and zirconium oxide catalytic material and a method for producing the same. The composite aluminium, cerium and zirconium oxide catalytic material is a composite oxide which consists of 15-30% of cerium oxide, 5-20% of zirconium oxide, 50-75% of aluminium oxide and 0-5% of other rear earth oxides expect cerium by weight. Compared with the prior art, the aluminium oxide is subjected to surface treatment, on one hand, the interaction of the aluminium oxide and the cerium and zirconium-base composite oxides is enhanced; and on the other hand, the uniformity of the aluminium oxide and the cerium and zirconium-base composite oxides is fully ensured; through the modification of a structural directing agent and a dispersing agent, the pore diameter and pore volume of the composite aluminium, cerium and zirconium oxide catalytic material are further improved, and good temperature resistance and aging resistance are obtained; and moreover, the composite aluminium, cerium and zirconium oxide catalytic material has the advantages of high oxygen storage capability and high oxygen storage and release velocities, so the purpose of the invention is realized.

The invention provides an LED (light-emitting diode) organosilicon pouring sealant. The LED organosilicon pouring sealant is composed of a component A and a component B, wherein the component A and the component B respectively comprise the following components that the component A is organopolysiloxane with a structural unit containing a -SiCH=CH2 group and a hydrogen silicide platinum family polysiloxane catalyst; the component B is organopolysiloxane with a structural unit containing a -SiCH=CH2 group, organopolysiloxane with a structural unit containing -SiH and at least one alkoxy, and alkynol or polyvinyl siloxane. When the pouring sealant provided by the invention is used for LED elements, the mixture is clear and transparent, and the compatibility is good; the pouring sealant has a good adhesive force on materials such as PPA (phenyl-propanolamine), PC (polycarbonate), zinc-plated aluminum and fluorescent powder in the LED elements after being cured at 50-60 DEG.C or room temperature, and the interlayer phenomenon is avoided; the organosilicon pouring sealant is high in transparency, cold and hot impact resistant, high temperature aging resistant and light aging resistant and has an excellent dielectric property.

The invention relates to a low-cost anti-aging brazing filler material used for electronic packaging and a preparation method thereof, relating to a soft brazing filler material and a preparation method thereof. The invention solves the technical problems that the traditional low silver content lead free brazing filler material has higher silver content, multiple elements are added, metallurgy preparation is complex, a curing crack can be easily caused and the melting point is higher. The brazing filler material comprises the following components: 0.60-0.79% of Ag, 0.50-0.90% of Cu, 0.02-0.20% of Ni, 2.10-4.00% of Bi and the balance of Sn. The preparation method comprises the step of carrying out smelting on Sn, Ag, Cu, Ni and Bi for twice, thus the brazing filler material is obtained. The melting point of the brazing filler material is 205-219 DEG C, the wettability and weldability are good, the cost is reduced by 30-43% compared with the brazing filler material SAC305, and the jointstrength and high temperature aging resistance of the brazing filler material are improved compared with SAC305 and SAC0307. The brazing filler material provided by the invention can be applied to the fields of electronic packaging, manual welding of packaging, wave soldering and reflow soldering.

The invention discloses an aging-resistant silicone rubber sealing material for high-speed rail sealing parts. 6-8 parts of oxane, 0.7-0.9 parts of silane coupling agent, 0.12-0.15 parts of tolyl diisocyanate, 3-5 parts of silica, 2-3 parts of fumed silica, 1.5-1.8 parts of zinc oxide , 2.5 to 4.5 parts of anti-aging agent, 2 to 4 parts of heat stabilizer, and 2 to 4 parts of crosslinking agent. The aging-resistant silicone rubber sealing material for high-speed rail seals of the present invention not only has good sealing performance, but also has excellent aging resistance, long service life, good oil and solvent resistance, and high temperature aging resistance; Good elasticity, low compression set, high temperature resistance and good mechanical properties.

The invention provides a catalyst used for purifying motor vehicle exhaust, and a preparation method thereof. The catalyst comprises a carrier with one coating or a plurality of coatings; and each coating contains alumina carrying silver and an oxygen storage material carrying platinum / palladium, wherein the silver is impregnated to be carried on the active alumina by a mixed solution of soluble silver salt and citric acid, and the platinum and the palladium are respectively impregnated to be carried on the oxygen storage material by the salt solutions thereof, so that the platinum and the palladium are not carried on the same oxygen storage material, the oxygen storage material is a mixture of cerium oxide and zirconia, the cerium oxide or ceria-zirconia solid solution, the Ag and Pt / Pd are separately carried on different oxide carriers. The preparation method comprises the following steps: (1) preparing the alumina carrying the silver, the oxygen storage material carrying the platinum and the oxygen storage material carrying the palladium; (2) preparing coating slurry; and (3) coating the coating slurry on the catalyst carrier. The catalyst provided by the invention for purifying the motor vehicle exhaust has low cost, good combustion activity and good resistance to aging.

The invention discloses a high-temperature aging-resistant flame-retardant polypropylene material for bellows and a preparation method thereof. The flame-retardant polypropylene material is composed of copolymerized polypropylene, a brominated flame retardant, an antimony-based flame It is composed of effect agent, silicone masterbatch, halogen absorber, antioxidant and toughening modifier. The preparation method is very simple. First, the components are fully mixed in batches, and then extrusion, cooling, drawing, Finely dice. The flame-retardant polypropylene material of the present invention has a good flame-retardant effect, and the flame-retardant grade can reach UL94 V-2 level, or even V-0 level, has good high-temperature aging resistance, and can be baked at 150°C for 360 hours without brittle cracking , Stable processing performance, continuous production, laser engraving, smooth surface without graininess, no precipitation of flame retardant, good hand feeling of extruded bellows, not easy to squeeze and burst.

The invention discloses an anticorrosive double-component adhesive for thermal power plant desulfurization flue linings and a preparation method thereof. The adhesive is prepared by mixing a component A and a component B in a mass ratio of 12:1. The component A is composed of the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane (107 glue), 30-50 parts of dimethyl silicone oil, 9-17 parts of filler, 40-60 parts of solvent a and 0.5 part of coupling agent. The component B is composed of the following components in parts by weight: 1.0-2.0 parts of curing agent, 0.3-0.6 part of catalyst, 3-5 parts of assistant and 10 parts of solvent b. The adhesive has the advantages of favorable strong acid corrosion resistance, high-temperature aging resistance, high / low temperature alternation resistance, favorable bonding property, higher application value as a flue lining adhesive, longer service life, short curing time and favorable workability.

The invention relates to a preparing method for a corrosion prevention organic silicon binding agent for a desulfurization chimney liner of a thermal power plant. The preparing method comprises the following steps that firstly, a first component is prepared, wherein hydroxyl-terminated polydimethylsiloxane, polyethylene glycol PEG 600, a defoaming agent, a coupling agent and a solvent a are added into a reaction kettle according to a certain proportion and stirred evenly, then inorganic filler is added multiple times with a small amount, vacuum stirring is carried out for 60 minutes under the condition of the vacuum degree of 0.08 MPa, and the first component of the binding agent is obtained; secondly, a second component is prepared, wherein the curing agent polyisocyanate, a catalyst and a solvent b are added into a reaction kettle according to a certain proportion and stirred evenly, and the second component of the binding agent is obtained; thirdly, the first component and the second component are blended at the mass ration of 20:1 at the room temperature and stirred evenly, and the organic silicon binding agent is obtained. The organic silicon binding agent prepared through the method is high in binding performance, excellent in strong acid and strong base corrosion resistance, and good in high-temperature aging resistance and high-low temperature alternating resistance.

The invention provides a two-component beauty joint agent and a preparation method thereof. The beautifying agent of the present invention has the texture of colored sand and frosted texture, overcomes the defects of existing products, has good environmental adaptability, convenient construction, strong adhesion, can be matched with ceramic tiles with different glossy textures, and is suitable for use as antique bricks, The beautiful joints of matt bricks such as gray bricks meet people's requirements for matching different styles of tile gaps. The seam beautifying agent of the present invention has wide sources of preparation raw materials, is easy to produce and prepare, and does not need expensive production equipment.

The invention relates to a cord-cable polyvinyl chloride (PVC) plastic for an automobile, which is formed by chemical crosslinking and mainly comprises PVC, a plasticizing agent, a heat stabilizer, a lubricating agent, an antioxidant, stuffing, a crosslinking agent, an evocating agent, a crosslinking assistant agent and an abrasion resistance modifier. The polymer crosslinking plastic material has the advantages of good abrasion resistance, excellent mechanical property, good high temperature resistance (the heat resistant grade can reach 120 DEG C and the low temperature can reach 40 DEG C below zero), over 70 percent of tensile strength and elongation at break under the ageing condition at 150 DEG C for 168 hours, little weight loss and simple processing technique.

The invention aims to disclose a nanometer ceria-zirconium solid solution and a preparation method thereof. The nanometer ceria-zirconia solid solution comprises the following components according to weight percent: 15 to 65% of cerium oxide, 12 to 70% of zirconia and 10 to 30% of compound oxide composed of other tombarthite oxide except for ceria and zirconium. Compared with the conventional products, the nanometer ceria-zirconium solid solution obtains larger pore diameter and pore volume through modification of a structural directing agent and a dispersing agent, has a favorable capability of resisting high temperature and ageing, and has the advantages of high oxygen storage capability and high speed in oxygen storage and discharge, so that the purposes of the invention are achieved.