118 results about "Long term ageing" patented technology

Lipobeads (liposome-encapsulated hydrogels) combine properties of hydrogels and liposomes to create systems that are sensitive to environmental conditions and respond to changes in those conditions in a fast time scale. Lipobeads may be produced by polymerizing anchored or unanchored hydrogels within liposomes or by mixing anchored or unanchored hydrogels with liposomes. Giant lipobeads may be produced by shrinking unanchored nanogels in lipobeads and fusing the resulting lipobead aggregates, long-term aging of anchored or unanchored lipobeads, or mixing anchored or unanchored aggregated nanogels with liposomes. Poly(acrylamide), poly(N-isopropylacrylamide), and poly(N-isopropylacrylamide-co-1-vinylimidazole) lipobeads were produced and characterized.

The invention relates to a space charge measuring device for a dielectric long-term aging process and belongs to the technical field of space charge measurement of solid dielectric. The space charge measuring device comprises a bracket, a rotary table, a common ground electrode, a high-voltage direct power supply and multiple space charge measuring mechanisms, wherein the multiple space charge measuring mechanisms are uniformly distributed along the circumference of the rotary table, the high-voltage direct current power supply is connected with the high-voltage direct current protection resistors of the high-voltage electrodes of the multiple space charge measuring mechanisms, a sample to be measured is arranged between a high voltage output electrode and an electric-acoustic pulse ground electrode, the high-voltage output end and the low-voltage output end of a pulse source are respectively connected with the high-voltage electrodes and a oscilloscope, an amplifier is connected with a sensor and the oscilloscope, and a computer is connected with the oscilloscope through a signal wire. With the adoption of the space charge measuring device for the dielectric long-term aging process, the test efficiency is greatly improved, and a large amount of test cost is saved.

A downhole crystal-based clock that is substantially insensitive to the factors that cause frequency deviation. The clock may be maintained at a predetermined temperature using a temperature sensing device and a heating device, where the predetermined temperature corresponds to the temperature at which the crystal experiences only slight frequency deviation as a function of temperature. A microprocessor may monitor the clock and compensate for long-term aging effects of the crystal according to a predetermined algorithm. The predetermined algorithm may represent long-term aging effects of the crystal which were derived by comparing the crystal clock to a more accurate clock (e.g., an atomic clock) prior to placing the clock downhole. In this manner, the crystal-based clock may be substantially free from the factors that cause frequency, and therefore time variations.

The invention discloses low rhenium and nickel-based single crystal high-temperature alloy and a preparation method thereof. The alloy comprises the following raw materials by mass percent: 6.75-7.25% of Cr, 7.25-7.75% of Co, 1.3-1.7% of Mo, 5.8-6.2% of W, 5.8-6.2% of Ta, 0.85-1.15% of Re, 5.9-6.1% of Al, 1.3-1.7% of Ti, 0.12-0.18% of Hf, 0.04-0.06% of C, 0.003-0.005% of B, 0.010-0.020% of Y, and the balance of nickel. The method comprises the following preparation steps: smelting master alloy by using a vacuum induction furnace; preparing a master alloy rod by gravity casting; preparing a single-crystal test rod by adopting a seed crystal method through a Bridgeman directional solidification technology; carrying out thermal treatment on single crystal high-temperature alloy. The alloy disclosed by the invention is high in incipient melting temperature, wide in melting temperature range, small in solidification interval, low in alloy density, high in strength, good in oxidation resistance, good in phase stability and low in cost; a harmful phase is not easy to generate in long-term aging.

The invention discloses a three-layer structural PET (polyethylene terephthalate) film and a solar battery back plate prepared from the three-layer structural PET film, and the three-layer structural PET film is formed by two-way stretching and co-extrusion of an interlayer PET film located in the middle and an inner layer PET film and an outer layer PET film which are located at two sides of the interlayer PET film. The three-layer structural PET film has thin thickness, high thermal conductivity, high reflection rate, good long-term aging resistance and other good performances. The solar battery back plate can be prepared by using the three-layer structural PET film as a substance, coating one side of the three-layer structural PET film with a weather-proof coating layer, and bonding an insulating film layer by use of an adhesive layer. On the basis of good thermal conductivity, reflection performance and aging resistance of the three-layer structure-based PET film, compared with the prior art, the solar battery back plate has better heat resistance and weather resistance, and has the advantages of being simple in structure and easy to repair.

The invention relates to a core-shell type polymer microsphere and a preparation method thereof. In the prior art, the polymer microemulsion is unstable, the polymer microsphere has poor temperature resistance and poor salt resistance, and the sealing effect is poor after long-term aging. A purpose of the present invention is mainly to solve the problems in the prior art. According to the technical scheme, the core-shell type polymer microsphere is prepared by carrying out a polymerization reaction on a reverse phase microemulsion under the action of a redox composite initiator; the reverse phase microemulsion comprises, by weight, 50 parts of an oil-soluble solvent, 3-20 parts of an emulsifier, 10-60 parts of a hydrophilic monomer, 0.5-10 parts of a hydrophobic monomer, and 10-50 parts ofwater; and through a two-step reaction method, a water phase solution containing acrylamide, other hydrophilic monomers and hydrophobic monomers is added to an oil phase containing an emulsifier in steps, and a polymerization reaction is performed. With the technical scheme, the problems in the prior art are well solved. The core-shell type polymer microsphere of the present invention can be usedfor the tertiary oil recovery of high temperature and high salinity oil reservoir.

The invention provides a water-based acrylic finish paint which comprises the following components in percentage by weight: 30-65% of water-based acrylic resin, 0.5-5% of dispersant, 0.1-5% of defoaming agent, 0.1-5% of base wetting agent, 10-30% of pigment and filler, 1-10% of pH regulator, 1-10% of thixotropic agent, 1-10% of flash etching inhibitor, 0.5-5% of film-forming assistant, 1-5% of light stabilizer and 5-20% of deionized water. The water-based acrylic finish paint provided by the invention is a single component paint, and is prepared from water-based acrylic resin used as a base, and multiple assistants. The water-based acrylic finish paint has the advantages of excellent aging resistance and high weather resistance. The experiment proves that the ultraviolet aging resistance of the water-based acrylic finish paint is up to 600 hours. In addition, the water-based acrylic finish paint also has the advantages of high thermal stability, favorable mechanical properties and outstanding freeze-thawing stability, satisfies the environmental-protection requirement, has a very high practical value, and is suitable for the occasions which require long-term aging resistance and have a high environmental-protection requirement.

The invention discloses a process for brewing and producing fragrant strong aromatic baijiu. The process has the advantages that processes for brewing mild aromatic, strong aromatic and fragrant aromatic baijiu and the like are fused and adjusted to form the process, pits with 'cross ridge' old pit mud pool bottoms and partial quartzite pool walls are used as fermentation containers, the process includes brewing technologies for acquiring multi-grain raw materials, stacking smaller lumped koji, feeding yeast for making hard liquor into the pits, steaming continuous distillers' grains, discharging distillers' grains in a layered manner, distilling baijiu in a layered manner, carrying out double-round bottom fermentation and the like, and the fragrant strong aromatic baijiu is produced by means of classified extracting, separate storing, long-term ageing and painstaking blending; the fragrant strong aromatic baijiu brewed and produced by the aid of methods of the process has different types of aroma and different types of harmonious flavor, is 'clear, mellow, sweet and pure' just like the mild aromatic baijiu, has the 'mellowness, smoothness and elegant pit aroma' of the strong aromatic baijiu in an emphasis manner and also has the characteristics of 'elegance, fineness, smoothness and lingering aftertaste' of the fragrant aromatic baijiu, market requirements on flavor diversification and fusion of baijiu can be met, and the like.

The invention discloses an asphalt mixture aging test method. The method comprises the steps that: a short-term aging hot-mixed asphalt mixture sample is obtained with a hot-mixed asphalt mixture accelerated-aging method specified by highway engineering asphalt and asphalt mixture testing procedures; the short-term aging hot-mixed asphalt mixture sample is obtained, and a testing method and testing equipments same as those of a pressure-aging-vessel-accelerated asphalt aging test specified by the highway engineering asphalt and asphalt mixture testing procedures are adopted, and an asphalt mixture long-term aging test is carried out; the performances of the long-term aging hot-mixed asphalt mixture obtained by the test is compared with the performances of an original non-aged asphalt mixture, such that the aging degree of the hot-mixed asphalt mixture can be accurately determined. With the testing method provided by the invention, the performance aging condition of the asphalt mixture after long term use in an actual environment can be simulated, such that the aging performance or the anti-aging ability of the asphalt mixture can be accurately determined.

The invention discloses a pipe for an aluminum alloy drilling rod of deep and ultra-deep wells and a manufacturing method thereof, and belongs to the technical field of petroleum pipe manufacture. The pipe comprises, by weight, 4.8-5.8% of Cu, 1.2-1.8% of Mg, 1.0-1.2% of Mn, 0.05-0.20% of Ti, 0.5-0.6% of Zn, 0.001-0.01% of B, 0.02-0.05% of Yb and the balance Al and unavoidable impurities. Through Cu precipitation strengthening, Mn solid solution strengthening and grain refinement at a specific temperature, Zn and Mg precipitation strengthening and Yb-B-Ti-combined use grain refinement, the synergism effects of solid solution strengthening, precipitation strengthening and grain refinement are obtained. A pipe blank is casted and the ingot casting is subjected to homogenization, extrusion and solid solution, a pipe blank homogenization temperature is in a range of 480-505 DEG C, and a pipe blank extrusion temperature is in a range of 400-450 DEG C. The manufacturing method is free of heat treatment processes such as solid-solution quenching and long-term aging, can carry out direct natural aging treatment on the quenched pipe subjected to pre-deformation and can simplify production processes and reduce environmental pollution.

The invention discloses an indoor acceleration simulation method for asphalt long-term aging and water damage coupling effects. The indoor acceleration simulation method includes steps: preparing samples, and determining the quantity of water to be added into an improved pressure aging container according to experiment conditions; laying the samples on layered shelves of a test piece rack in the improved pressure aging container, and mounting a rainfall control plate right above the shelf on a top layer; sealing the improved pressure aging container, setting the experiment temperatures, the experiment time and the experiment pressures, and allowing the water to fall right above the top surface of the rainfall control plate so as to simulate rain; completing experiments when the requirement of the experiment time is met, and taking the samples, on which the aging and water damage coupling effects are realized, out of the improved pressure aging container and testing the performance of the samples. Requirements of the experiments can be met by the determined quantity of the water. The indoor acceleration simulation method has the advantages that long-term aging of the aging samples in watered/waterless states can be simulated on the basis of the improved pressure aging container, the indoor acceleration simulation method is further implemented by the aid of an additional rainwater control system, accordingly, water damage procedures in different degrees can be simulated, and environments with asphalt long-term aging and water damage coupling effects in different aging degrees and water damage degrees can be simulated.

The invention provides a prediction method of the long-term aging performance degradation of high-Nb type GH4169 alloy. The method takes the long-term aging post-tissue of the alloy and the performance data of the long-term aging post-tissue of the alloy as a basis, and parameters, aging temperature T, aging time t and a hardness value of the alloy in a long-term aging process of the alloy are represented as a predictable function relationship. The predication method is suitable for hardness predication in the long-term aging process of the alloy and can provide reference data for designing and using the alloy. The prediction method is realized in the following steps: 1) carrying out heat treatment on the alloy; 2) implementing long-term aging experiments of different temperatures and time; and 3) constructing and verifying a long-term aging performance prediction model. When the method disclosed by the invention is adopted, the long-term tissue and performance of the alloy can be more accurately predicted, and a life prediction basis is provided for the use of the type of alloy. The prediction method can be applied to performance prediction in the long-term aging process of the hot-end component of the high-Nb type GH4169 alloy of the aerospace field.

The invention relates to a composite auxiliary agent for a random copolymerized polypropylene pipe material, which is polymerized by a liquid phase bulk single-loop pipe reactor. The composite auxiliary agent is compounded by the following compound systems in portion by weight: 10 to 40 portions of long-term ageing resistant auxiliary agent, 10 to 30 portions of processing auxiliary agent, 20 to 50 portions of crystal shape transforming agent, and 10 to 30 portions of weather resisting agent, wherein the long-term ageing resistant auxiliary agent is a compound system of a lactone stabilizer, ahindered phenol antioxidant and a nontoxic amine antioxidant; the processing auxiliary agent is one or a mixture of several of fluorine elastomer or low-molecular polymers in random proportion; the weather resisting agent is a compound system of an ultraviolet absorbent in a light stabilizer, an organic nickel stabilizer and a hindered amine stabilizer; and the crystal shape transforming agent isa crystal shape transforming agent transformed from an alpha crystal shape to a beta crystal shape. Therefore, the processing property, the mechanical property, the environmental stress cracking resistance and the long-term ageing resistance of random copolymerized polypropylene resin are remarkably improved.

The invention discloses an irradiation crosslinking wearing-resistant low-torque low-smoke halogen-free flame-retardant cable sheath material for a nuclear power station cable and a preparation method and a cable product of the material. The irradiation crosslinking wearing-resistant low-torque low-smoke halogen-free flame-retardant cable sheath material for the nuclear power station cable consists of the following components: an ethylene-vinyl acetate copolymer (EVM), an ethylene-octylene copolymer (POE), ultra-high molecular weight polyethylene (UHMWPE), polyvinylidene fluoride (PVDF), a compatilizer, a flame retardant, a flame retardant synergist, irradiation resistant aids, a composite antioxidant, crosslinking aids and a lubricant. After irradiation crosslinking, a wire cable product made of the cable sheath material has very good properties of oil resistance, wearing resistance, torque resistance, flame retardancy and the like, is very excellent in long-term aging resistance, excellent in irradiation resistance, meets requirements of nuclear power stations of a third generation on a service life of 60 years (90 DEG C), and can be used in harsh environments of the nuclear power stations.

The invention discloses a solar battery back plate. The solar battery back plate comprises a PET base body layer, a weather-proof thin film layer, an adhesive layer and a binding layer, wherein the weather-proof thin film layer with long-term weather-proof property is arranged on one side of the PET base body layer; the PET base body layer and the weather-proof thin film layer are glued through the adhesive layer; and the binding layer used for gluing a packaging adhesive film is arranged on the other side of the PET base body layer. The super-high-reflectivity solar battery back plate provided by the invention has the advantages of high binding force with EVA, high long-term aging resistance, and the like; and meanwhile, the reflectivity of the solar battery back plate in a wavelength range of 400-1,100nm is greater than 97%, so that assembly efficiency can be obviously improved.

The invention discloses a high-property polycarbonate composition containing an SAG compatibilizer which has a special structure. The polycarbonate composition comprises PC resin, PET resin, a compatibilizer, a toughening agent, a fire retardant, an antioxidant and other auxiliary agent, wherein the compatbilizer is an SAG copolymer which is prepared from 50-85 wt% of styrene monomers, 10-40 wt% of acrylonitrile monomers and 0.5-30 wt% of glycidyl methacrylate in a water medium by using a suspension polymerization process. In the preparation of the composition, a specially prepared compatibilizer is selected, so that the compatibility of PC resin and PET resin is increased, the transesterification between the PC resin and the PET resin is notably inhibited, and the stability and toughness of the blend products are increased. In addition, a proper amount of a dispersing agent is selectively added in the preparing process of the compatibilizer, so that the long-term influence on PC/PET alloy by damp and hot conditions is deceased to a low level. The initial mechanical properties and long-term aging resistance in damp and hot conditions of the polycarbonate composition provided by the invention are both optimized greatly, so that the polycarbonate composition is especially suitable for occasions with high requirements of using environment.

The invention relates to a preparation method of a hot-melt pressure-sensitive adhesive for a high-density polyethylene self-adhesion coiled material. The preparation method comprises the following steps of: compounding another styrene diene styrene block copolymer (SDS) synthetic rubber by using an SDS rubber elastomer as a main matrix resin to modify an elastomer; and mixing with proper sticky resin, softening agents, antioxidant and the like to prepare the hot-melt pressure-sensitive adhesive. The characteristics of SDS synthetic rubber elastomers with two different molecule structures are fully utilized, and the problems of elasticity, room-temperature construction and high-temperature resistant adhesiveness are successfully solved, so that a product which is easy to process, compatible with various materials, and high in transparency, chemical resistance, long-term ageing resistance, high wettability of high-density polyethylene (HDPE) substrates and high in adhesion is obtained.

An inkjet recording ink comprising an aqueous medium having dissolved or dispersed therein a dye having a specific property or structure, and containing at least one antiseptic is provided, which can ensure excellent ejection stability and color hue even after long-term aging of the ink and exhibit excellent weather resistance.

The invention discloses a low temperature-resistant heat-resistant long-life PVC (Polyvinyl Chloride) wire cable material which is prepared from the following components: 100 weight parts of PVC, 45 to 55 weight parts of a plasticizer, 5 to 11 weight parts of a composite stabilizer, 3 to 5 weight parts of a composite flame retardant, 5 to 25 weight parts of additives, 0.5 to 0.8 weight part of a composite lubricating agent, 0.6 to 1.3 weight parts of auxiliary stabilizers and 1 to 2 weight parts of colour masterbatches; the low temperature-resistant heat-resistant long-life PVC wire cable material takes the PVC as a base material; N-C8-C10 alcohol tribenzoate and dioctyl sebacate are added into the base material, so that the mixture can bear the low temperature of -40 DEG C and the high temperature of 105 DEG C; the auxiliary stabilizers, such as a special calcium-zinc composite stabilizer, hydrotalcite and beta-diketone, are added and cooperate the plasticizer, so that the long-term aging performance of the formula can be ensured; kaolin and silicone are added to improve the insulating property of the PVC material, so that the discharge damage in a wire transmission process can beinhibited.