268results about How to "High thermal stability" patented technology

Intermetal dielectric (IMD) and interlevel dielectric (ILD) that have dielectric constants (K) ranging from 2.0 to 2.6 are prepared from plasma or photon assisted CVD (PACVD) or transport polymerization (TP). The low K dielectric (LKD) materials are prepared from PACVD or TP of some selected siloxanes and F-containing aromatic compounds. The thin films combine barrier and adhesion layer functions with low dielectric constant functions, thus eliminating the necessity for separate adhesion and barrier layers, and layers of low dielectric constant. The LKD materials disclosed in this invention are particularly useful for <0.18 .mu.m ICs, or when copper is used as conductor in future ICs.

A method of preparing a reinforced silicone resin film, the method comprising the steps of impregnating a fiber reinforcement in a free radical-curable silicone composition comprising a silicone resin, and curing the silicone resin of the impregnated fiber reinforcement; wherein the reinforced silicone resin film comprises from 10 to 99% (w/w) of the cured silicone resin and the film has a thickness of from 15 to 500 μm; and a reinforced silicone resin film prepared according to the method.

A subject for the invention relates to processes for producing a polycarbonate containing a plant-derived starting material and to molded articles thereof, the polycarbonate having excellent mechanical strength, heat resistance, a low refractive index, a large Abbe number, low birefringence, and excellent transparency. The invention relates to a process for producing a polycarbonate which includes a step in which one or more dihydroxy compounds including a dihydroxy compound having at least one linking group —CH₂—O— in the molecule thereof are reacted with a carbonic acid diester in the presence of a polymerization catalyst, wherein the dihydroxy compound having at least one linking group —CH₂—O— in the molecule thereof has a formic acid content lower than 20 ppm. The invention further relates to a molded article constituted of a polycarbonate or a composition of the polycarbonate, the polycarbonate being a polycarbonate which contains constituent units derived from a dihydroxy compound having at least one linking group —CH₂—O— in the molecule thereof and has an Abbe number of 50 or larger and a 5% weight loss temperature of 340° C. or higher.

The invention belongs to the technical field of emulsion preparation, and discloses a stable-protein high-internal-phase oil-in-water emulsion and a preparation method thereof. The method comprises the following steps: a protein is dispersed into water, after the protein is fully hydrated, an aqueous phase protein solution is obtained, an oil phase is added, emulsification is performed, and therefore the stable-protein high-internal-phase oil-in-water emulsion is obtained. The method disclosed by the invention does not need any coagulants or surfactants, and the obtained high-internal-phase oil-in-water emulsion has good viscoelasticity, high heat stability and storage stability, and an excellent protection or controlled release effect on the oil phase; and the emulsion has good gelling performance, strong plasticity and remoldability, facilitates further processing, and has good application prospects in the fields of chemical products, daily chemicals, pharmaceuticals, food and healthcare products.

The invention discloses antioxidant, anti-wear and antirust lubricating oil for an automobile gear. The lubricating oil is characterized by being prepared from the following raw materials: base oil, a clearing agent, a dispersing agent, a preservative, an extreme-pressure anti-wear agent, an oiliness agent, an antioxidant, a viscosity index improver, an antirust agent, a pour point depressant and an antifoaming agent, wherein in the base oil of the lubricating oil, the kinematic viscosity below 100 DEG C is 1.5-40mm<2>/s, the viscosity index is over 100, the pour point is below -25 DEG C, and the sulfur content is below 0.01% by mass. The lubricating oil for an automobile gear, disclosed by the invention, has the advantages of simple composition, low cost, relatively good viscosity index, high anti-wear property and long service life; the compatibility between the lubricating oil additive and the base oil is relatively good, and the lubricating oil is of relatively high stability; and compared with existing automobile lubricating oil, the automobile lubricating oil disclosed by the invention has high corrosion resistance, the preparation technology of the lubricating oil is simple, and the steps are simple and environment-friendly and easy to implement.

The present invention discloses a manganese-sodium-tungsten-silicon composite oxide oxidative coupling of methane catalyst containing or not containing titanium, obtained by loading manganese-sodium-tungsten onto a titanium-silicon molecular sieve or a pure silicon molecular sieve by means of a step-by-step impregnation method and calcination. The manganese-sodium-tungsten-silicon composite oxide catalyst containing or not containing titanium has the following structural formula: vMnO2·xNa2O·yWO3·zTiO2·(100-v-x-y-z)SiO2, the v, x, y, and z respectively representing the fractional quality occupied by metal manganese oxide, sodium oxide, tungsten oxide and titanium oxide, 0.3≤v≤16, 0.1≤x≤5, 0.6≤y≤21, 0.0≤z≤4. The manganese-sodium-tungsten-silicon composite oxide catalyst containing or not containing titanium set forth in the present invention is used for oxidative coupling of methane reactions, having excellent low-temperature catalytic activity and ethylene/propylene selectivity generation and reaction stability.

A cream solder obtained by kneading an Sn—Ag—Cu alloy together with a flux, wherein the Sn—Ag—Cu alloy includes a mixture of a first powdery alloy and a second powdery alloy, the first powdery alloy is represented by an Sn—Ag phase diagram having a solid-liquid coexistence region and has a given silver amount which is larger than that in the eutectic composition (3.5 wt. % silver), and the second powdery alloy has a silver amount which is that in the eutectic composition (3.5 wt. % silver) or which is close to that in the eutectic composition and is smaller than that in the first powdery alloy. This cream solder has excellent strength and thermal stability, and satisfactory bonding properties. It is based on an inexpensive Sn—Ag—Cu solder alloy. It is suitable for use as a high-temperature-side lead-free solder material conformable to temperature gradation bonding. Also provided is a method of soldering.

The present invention provides an improved, commercially available organic working fluid, which is operable under a broad range of temperatures, is thermally stable, has a high auto-ignition temperature, low freezing point and high critical temperature and is benign to the environment, and safe for human use. Such an organic working fluid is useful in organic Rankine cycle (ORC) power plants or units and other systems of the like; as an intermediate fluid for heat-recovery wherein heat from various heat sources is transferred using the intermediate fluid to a further working fluid and converted into work, and the intermediate fluid is also exploited to produce electricity. Such organic working fluids are also operable as heat transfer fluids either in ORC power plants or units or in other heat transfer systems. For this purpose the present invention presents a working fluid comprising at least one highly branched, heavy iso-paraffin hydrocarbons, or a mixture of two or more of such hydrocarbons. Preferably, at least one highly branched iso-paraffin hydrocarbon is present as the major component (i.e. at least 50% by volume) in the working fluid. A preferred sub-class of the class of the branched iso-paraffins which are suitable to be incorporated in organic working fluids of the present invention includes 8 to 20 carbon atom-containing hydrocarbons having at least one methyl radical (CH₃) arranged to achieve a highly stable compound.

A method of preparing a silicone resin film comprising coating a first release liner with a filled silicone composition comprising a hydrosilylation-curable silicone composition and a flame retardant filler, applying a second release liner to the coated first release liner to form an assembly, compressing the assembly; and curing the silicone resin of the compressed assembly, wherein the silicone resin film has a thickness of from 1 to 500 μm; and a silicone resin film.

Provided are formulations, methods of making, and methods of using one or more Fischer-Tropsch Base Oils of the present invention in a low sulfur, low sulfated ash, and low phosphorus engine lubricant to enhance thermal stability of the lubricant as well as the high-temperature preformance of an engine housing the lubricant.

Disclosed is a polyimide film, which is colorless and transparent, with superior mechanical properties and high thermal stability.

A purpose of the present invention is to provide a method of enabling denitration of an exhaust gas effectively at 450° to 600° C. and catalysts to be used for the method. A first catalyst comprises a composite oxide composed of titanium oxide and at least one of tungsten oxide, molybdenum oxide and boron oxide and having solid acid strength (Ho) of −11.93 or lower. A second catalyst is a high-temperature denitration catalyst which comprises zirconium oxide and SO₃ or SO₄²⁻, has solid acid strength (Ho) of −11.93 or lower and is used at a reaction temperature of 450° to 800° C. A third catalyst is a high-temperature denitration catalyst wherein at least one of tungsten oxide, molybdenum oxide and boron oxide is supported on a carrier comprising zirconium oxide and SO₃ or SO₄²⁻ and having solid acid strength (Ho) of −11.93 or lower and which is used at a reaction temperature of 450° to 800° C.

A method of preparing a reinforced silicone resin film comprising impregnating a fiber reinforcement in a nano-material-filled silicone composition comprising a condensation-curable silicone composition and a carbon nanomaterial, and curing the silicone resin of the impregnated fiber reinforcement; and a reinforced silicone resin film prepared according to the preceding method.

The invention relates to a cellulose/layered boron nitride high-dielectric nano-composite film and preparation method of the cellulose/layered boron nitride high-dielectric nano-composite film. The cellulose/layered boron nitride high-dielectric nano-composite film has an obvious layered structure and comprises cellulose and boron nitride nanosheet layers uniformly dispersed in the cellulose. Thepreparation comprises the following steps: 1) preparing a boron nitride peeling layer dispersion liquid; 2) preparing a cellulose/boron nitride composite liquid: cooling the boron nitride peeling layer dispersion liquid obtained in the step 1) to below 0 DEG C, adding the cellulose according to the mass ratio of the boron nitride and the cellulose of (5: 95) to (15: 85), rapidly stirring and dissolving, performing centrifugation to remove impurities, thereby obtaining the cellulose/boron nitride composite liquid; 3) carrying out film formation on the prepared cellulose/boron nitride compositeliquid prepared in the step 2) in a coagulation bath to obtain the cellulose/layered boron nitride high-dielectric nano-composite film. The composite material provided by the invention has the layeredstructure and very high dielectric properties and high thermal conductivity (the breakdown voltage reaches 300 to 450 MVm<-1>, and the energy storage density is as high as 4 Jcm<-3> about, the thermal conductivity is about 2Wm<-1>K<-1>), and the cellulose/layered boron nitride high-dielectric nano-composite film has broad application prospects in the field of photovoltaic energy storage materials.

A magnetoresistive element includes an antiferromagnetic layer formed from a layer containing manganese, a layered magnetization fixed layer which includes a first magnetization fixed layer located over a side of the antiferromagnetic layer and formed from a layer containing a ferromagnetic material and a platinum group metal, a second magnetization fixed layer formed from a layer containing a ferromagnetic material, and a first nonmagnetic intermediate layer located between the first magnetization fixed layer and the second magnetization fixed layer, a magnetic free layer formed from a layer containing a ferromagnetic material, and a second nonmagnetic intermediate layer located between the layered magnetization fixed layer and the magnetic free layer.

The invention relates to a heteropolyacid or heteropolyacid salt and microporous coordination polymer composite material and a preparation method thereof. The preparation method is characterized by comprising the following steps: a first step of dissolving zirconium salt in a mixed solvent of a modifier and a solvent to form a settled solution while stirring at the normal temperature and under the normal pressure; a step 2 of adding the settled solution obtained in the first step into an organic ligand until the settled solution is dissolved; a third step of adding heteropolyacid or heteropolyacid salt into the settled solution obtained in the second step to prepare a mixed solution and enabling the mixed solution to react to obtain the heteropolyacid or heteropolyacid salt and zirconium-based microporous coordination polymer composite material, wherein by calculating according to the added zirconium salt, the yield of the heteropolyacid or heteropolyacid salt and microporous coordination polymer composite material is 85-93 percent.

A one-layer three-way catalyst is described for the cleaning of the exhaust gases of internal combustion engines with outstanding activity and thermal stability. The catalyst comprises an active aluminum oxide, a first cerium/zirconium mixed oxide and a second cerium/zirconium mixed oxide. The first cerium/zirconium mixed oxide has a higher zirconium oxide content than the second mixed oxide. The first cerium/zirconium mixed oxide is catalytically activated with rhodium and the second cerium/zirconium mixed oxide with palladium.

The invention discloses a Fischer-Tropsch synthesis catalyst, and a preparation method and an application thereof. The catalyst is a composite metal oxide with a perovskite structure, and the general formula of the catalyst is A<x>A'<1-x>B<y>B'<1-y>O<3>, wherein A is rare earth metal lanthanum, A' is metallic potassium, B is transition metal nickel, B' is transition metal cobalt, x is greater than 0.7 and smaller than 1, and y is greater than 0 and smaller than 0.35. The preparation method of the cobalt-based Fischer-Tropsch synthesis catalyst comprises the following steps: preparing a solution with cobalt nitrate, nickel nitrate, potassium nitrate and lanthanum nitrate as precursors and citric acid or glycol as a complexing agent, uniformly stirring, carrying out water evaporation to make the solution become a viscous gel from a transparent sol, drying, and roasting to obtain the composite oxide Fischer-Tropsch synthesis catalyst with the perovskite structure. The catalyst can be applied to Fischer-Tropsch synthesis reactions. The catalyst can be adopted to make the CO conversion rate reach 90% or more and guarantee very high C<5><+> selectivity.

The invention belongs to the technical field of the lithium ion battery, and discloses a high-voltage functional electrolyte and a preparation method and an application therefor. The high-voltage functional electrolyte is prepared by adding a functional additive into the common electrolyte, wherein the functional additive accounts for 0.25-5% of the common electrolyte based on mass percentage; and the structural formula of the functional additive is as shown in the formula (1). The functional additive which is diethyl (thiophene-2-methyl) phosphate can be used as the high-voltage film-forming agent and the flame-retardant additive of the lithium ion electrolyte; the electrolyte containing the functional additive is non-combustible; and the room-temperature and high-temperature cycling performances of the lithium ion battery prepared from the electrolyte are both improved under 3-5.0V, so that the high-voltage functional electrolyte is wide in the application prospect.

A cycloolefin addition polymer is prepared by addition polymerization of a cycloolefin-functionalized siloxane and optionally norbornene in the presence of catalyst A which is a nickel or palladium complex having a cyclopentadienyl ligand and a methyl, triphenylphosphine or allyl ligand and co-catalyst B, typically tris(pentafluorophenyl)boron or trityltetra(pentafluorophenyl)borate. The polymer is easy to manufacture and has high thermal stability and mechanical strength as well as good gas permeability.

The invention discloses a preparation method of a nano-silica surface grafted hydroxyl terminated polybutadiene rubber. The method includes: 1) synthesis of isocyanate terminated nano-silica: dispersing cleaned and activated nano-silica into an acetone solution, conducting ultrasonic dispersion for dozens of minutes, slowly adding a catalyst containing isophorone diisocyanate solution dropwise according to the mass ratio of nano-silica to isophorone diisocyanate of 1:1-3, carrying out reaction at 50-80DEG C for 3-6h, performing centrifugal collection, then using acetone to conduct ultrasonic dispersing, washing and centrifugation three to five times, thus obtaining nano-silica with surface containing an isocyanic acid group; and 2) synthesis of hydroxyl terminated polybutadiene rubber surface grafted modified nano-silica. The modified nano-silica has good dispersibility in butyl acetate solution, and the surface polymer grafting content is high.

A hydraulic fluid of the present invention contains, as a base oil, an ester having two or more ring structures, the two or more ring structures being at least one selected from an aromatic ring and a saturated naphthenic ring. Particularly, the hydraulic fluid contains an ester having two or more aromatic rings as the base oil. The hydraulic fluid has low energy loss due to compression and exhibits excellent responsiveness when being used in a hydraulic circuit. Consequently, the hydraulic fluid realizes energy-saving, high-speed operation and high precision of control in the hydraulic circuit.

The invention relates to the field of gene engineering, and in particular relates to a glucose oxidase mutant GOD with improved thermal stability, and a gene and application thereof. After the glucoseoxidase mutant disclosed by the invention is sequentially mutated in a wild type fixed-point manner, multiple mutants with obviously improved thermal stability and catalytic efficiency are obtained.The glucose oxidase mutant disclosed by the invention has good enzymatic properties and can be applied to the industries of feeds, foods, medicines, textiles and the like.