41results about How to "High dynamic viscosity" patented technology

The invention discloses a bituminous mixture used for a thin layer overlay of cement concrete pavement and preparation and construction methods of the bituminous mixture. The bituminous mixture comprises mineral aggregate, bitumen, a fiber stabilizer and an additive, wherein filler in the mineral aggregate is copper tailing power. The bituminous mixture has the advantages that the copper tailing power is used as the filler in the bituminous mixture, thus copper tailing is comprehensively recycled. Besides, the bituminous mixture is superior in performances, is easily compacted, and can be paved on the cement concrete pavement for 1.5-2.5cm; the damaged pavement can be quickly repaired after construction; the smoothness and the skid resistance of the pavement are restored; the quality of the pavement is improved; the service life of the pavement is prolonged; driving comfort and safety are improved; the pavement can also be precured; the construction cost is lowered; energy and resources are saved; influences on environment and facilities are reduced; and the like. Moreover, the preparation method and the construction method of the bituminous mixture are simple and practicable, easy to operate and high in practicability.

The invention discloses a high-viscosity modified asphalt material. The asphalt material is prepared from the following raw materials in parts by mass: 100 parts of matrix asphalt, 4-7 parts of a thermoplastic elastomer, 4-10 parts of waste rubber powder or an ethylene-vinyl acetate copolymer, 1-3 parts of a plasticizer, 2-4 parts of thermoplastic resin, 3-5 parts of a solubilizer, 0.2-2 parts ofa stabilizer, 0.5-1.5 parts of a chemical modifier and 0.2-0.7 part of polypropylene glycol. Through the high-viscosity modified asphalt material, the storage stability of high-viscosity modified asphalt is improved; meanwhile, high-temperature viscosity of the high-viscosity modified asphalt is reduced; when the high-viscosity modified asphalt material is applied to mixing of asphalt mixture, themixing temperature is low; the high-viscosity modified asphalt material is easy to construct, low in cost and simple in preparation method.

The invention discloses technology for producing direct spinning terylene industrial filaments after liquid state polycondensation of prepolymer and belongs to the technical field of spinning. The technology comprises the processes of esterification, prepolycondensation, liquid state polycondensation, and spinning, and is characterized by comprising the following steps of: performing prepolycondensation reaction on esterified ethylene glycol and phthalic acid to prepare a melt with the viscosity of 0.3 to 0.4dl / g, and conveying the melt to a liquid state polycondensation kettle for liquid state polycondensation by using a booster pump; and conveying the melt to a spinning beam for spinning through a gear pump, wherein the inherent viscosity of the polyester melt after liquid state polycondensation is 0.85 to 1.05dl / g. By directly conveying the melt into the liquid state polycondensation kettle for polycondensation and performing the production technology of directly spinning the melt, the production technology for producing the direct spinning terylene industrial filaments after the liquid state polycondensation of the prepolymer shortens the process flow, reduces the production energy consumption and production cost, and solves the technical problem of difficulty in conveying the melt simultaneously.

The invention relates to high-performance styrene-butadiene-styrene block copolymer (SBS) modified emulsified asphalt and a preparation method thereof. The high-performance SBS modified emulsified asphalt is prepared from the following components by weight percent: 56.0-67.0% of matrix asphalt, 1.2-2.5% of SBS, 0.5-1.5% of ethylene vinyl acetate (EVA) wax, 0.2-2.5% of cationic emulsifier, 0-0.2% of thickening agents and 30.0-42.0% of water. The high-performance SBS modified emulsified asphalt can generate a thick asphalt membrane after demulsification. The asphalt membrane has a high softening point, is high in performance (PG) grade and dynamic viscosity and good in low-temperature performance, and strengthens bond performance, waterproof performance and deformation-resisting capability. The SBS modified emulsified asphalt is remarkably superior to ordinary modified emulsified asphalt in high-temperature performance, low-temperature performance and bond performance, and ensures characteristics required by road construction, such as a bond layer for ultrathin overlay of pavement, and new construction or maintenance of hot or heavy-duty roads.

The invention relates to hyaluronic acid composite cross-linked hydrogel and a preparation method thereof. By combining the characteristic that an active group of hyaluronic acid can be used as a chemical modification site with the characteristic of polyanion electrolyte of hyaluronic acid, different groups and different spatial conformations of the substances such as 1,4-butanediol diglycidyl ether, polyethylene glycol, sodium alginate and gelatin are utilized to perform composite crosslinking and modifying with hyaluronic acid, and the proportion of each component is analyzed to determine the optimum formula of each component in the crosslinking reaction; the molecular weight of the prepared hyaluronic acid composite hydrogel is obviously increased, especially, the dynamic viscosity of the prepared hyaluronic acid composite hydrogel is remarkably increased. The hyaluronic acid composite cross-linked hydrogel prepared by the preparation method disclosed by the invention is great in molecular weight and great in dynamic viscosity, has the advantages of relatively strong space blocking effect and lubricating effect, good biocompatibility, good stability, and the like, and can be used for a tissue filling material, a lubricant in an articular cavity and a tissue adhesion preventing material of operation.

The invention discloses novel high viscosity asphalt and a preparation method thereof. The novel high viscosity asphalt comprises the following raw materials in parts by weight: 100 parts of base asphalt with high asphaltene content, 0.1-1.2 part of polyphosphoric acid, 2-12 parts of a ductility improver mother liquid, 1-8 parts of a dispersant, and 0.2-0.5 part of a coupling agent. The preparation method comprises the following steps: adding the polyphosphoric acid in the molten base asphalt to perform a chemical modification reaction, then adding the ductility improver mother liquid, continuing to react, and finally adding the dispersant and the coupling agent to continue to react for a period of time to prepare high viscosity asphalt, wherein the whole process is performed under a highs-speed stirring condition. The high viscosity asphalt is high in 60-degree dynamic viscosity, high in softening point, high in low-temperature ductility, stable to store, and good in adhesion to aggregates, has excellent high temperature stability, excellent low temperature anti-cracking performance, excellent anti-fatigue performance and excellent water resistance, is especially suitable for high-temperature humid areas, areas with relatively high diurnal temperature difference, and paving of heavy-duty roads and drainable pavements, effectively prevents common pavement damages such as pavement rutting, pavement upheaval, pavement fatigue cracking, pavement cold cracking and water encroachment on pavements, and prolongs the service life of the pavement.

The invention discloses chemically-modified hard asphalt and a preparation method thereof. The chemically-modified hard asphalt comprises the following components in parts by weight: 100 parts of basic asphalt, 0.5-3.0 parts of polyphosphoric acid, 2-12 parts of ductility increasing agent mother liquor and 0.2-0.4 part of a surfactant. The preparation method comprises the following steps: adding polyphosphoric acid into the melted basic asphalt for chemically-modified reaction, then adding the ductility increasing agent mother liquor for further reaction, and finally adding the surfactant for further reaction for a period of time to prepare the chemically-modified hard asphalt. The whole process is implemented under a high-speed stirring condition. The chemically-modified hard asphalt prepared by the preparation method disclosed by the invention is high in flow resistance, high in softening point, high in low-temperature ductility, high in bonding property with aggregate, and excellent in high temperature stability, low temperature cracking resistance, fatigue resistance and water invasion resistance; the chemically-modified hard asphalt is particularly suitable for areas with high temperature, wet areas and areas with large diurnal temperature difference and can be used for paving a pavement of a traffic road, so that common pavement damage phenomena such pavement rutting, upheaval, fatigue cracking, low-temperature cracking and water invasion of the pavement are effectively prevented, and the service life of the pavement is prolonged.

The invention discloses an injected face filler compound gel for cosmetic plastic surgery and a preparation method thereof. The injected face filler compound gel is used for plastic surgery and is mainly contains gel formed by organically mixing non-crosslinking sodium hyaluronate and cellulose ethers and optional fine particles such as hydroxyapatite (CaHAP) fine particles. The injected face filler compound gel for cosmetic plastic surgery is uniform in texture, can stabilize the fine particles for a long time, for example, the hydroxyapatite uniformly dispersed in the gel, has expected rheological behavior (high elasticity modulus and high dynamic viscosity) and meanwhile is suitable for industrial filling and clinic injection.

The invention relates to an agricultural chemical with biological diesel solvent, and relative preparation, wherein said chemical comprises original drug, solvent, emulsion, while said solvent is biological diesel or the mixture of biological diesel and normal chemical solvent. And its preparation comprises that; mixing the agricultural chemical, some biological diesel, or mixing the agricultural chemical, some biological diesel and some normal agricultural chemical solvent; adds some emulsion. The invention can reduce pollution, reduce cost and improve safety.

The invention discloses procyanidine-modified carboxymethyl chitosan, a preparation method thereof, and application thereof in the fields of medical materials, health-care foods, cosmetics and the like. The procyanidine-modified carboxymethyl chitosan keeps the characteristics of carboxymethyl chitosan and has high oxidation resistance, antibacterial activity, barrier properties and the like, and is worthy of being applied.

The invention discloses rubber powder compound modified hyperviscous asphalt for a noise-reducing and water draining pavement. The asphalt is prepared from pavement petroleum asphalt, activated rubberpowder, a styrene thermoplastic elastomer, a stabilizer and a tackifier. The preparation method comprises the following steps: adding the tackifier into the preheated pavement petroleum asphalt to besheared for 30-60 min; then adding the activated rubber powder and the styrene thermoplastic elastomer to be further sheared; then adding the stabilizer to be sheared for 10-30 min; and developing the material for 60-150 min to obtain the rubber powder compound modified hyperviscous asphalt for the noise-reducing and water draining pavement. The modified hyperviscous asphalt provided by the invention is high in dynamic viscosity, high in softening point, relatively good in sticky toughness and relatively small in flyoff loss and leakage loss, detection results such as needle penetration, ductility and dynamic viscosity can reach a code requirement, and the water damage preventing performance and high temperature anti-rut performance can be improved obviously. The rubber powder compound modified hyperviscous asphalt also has the advantages of being high in low temperature anti-crack ability, long in service life, low in cost and the like, is high in cost performance, and has remarkableengineering application value.

The invention relates to the technical field of rubber asphalt, and particularly discloses high-viscosity rubber asphalt and a preparation method thereof. The high-viscosity rubber asphalt is preparedfrom 100 parts of asphalt, 5 to 15 parts of rubber powder, 2 to 7 parts of SBS, 0.5 to 3 parts of oxidized polyethlene wax, 0.04 to 0.4 part of a first crosslinking aid, 1 to 4 parts of aromatic hydrocarbon oil and 0.2 to 0.6 part of a second crosslinking aid; the preparation method comprises the following steps: stirring aromatic hydrocarbon oil, SBS and oxidized polyethylene wax, adding the first crosslinking aid to obtain a polymer mother solution A, melting asphalt, adding the polymer mother solution A, stirring while keeping the temperature, adding rubber powder, carrying out high-speedshearing and grinding on the mixture, adding the second crosslinking aid, and stirring while keeping the temperature to obtain the high-viscosity rubber asphalt. The adhesive force (dynamic viscosityat 60 DEG C) between the rubber asphalt prepared by the scheme and aggregate can meet the requirements of special asphalt pavements, and the rubber asphalt has the advantages of better high temperature resistance, water damage resistance and the like.

The invention discloses a special high-temperature-resistant and high-absorption coating for a die-casting mold. The special high-temperature-resistant and high-absorption coating is prepared from thefollowing materials of: epoxy resin, silicone acrylic emulsion, deionized water, polydimethylsiloxane, dipentaerythritol, compound inorganic pigment, strontium chromate powder, magnesium oxide powder, graphite powder, yttrium oxide, sodium citrate, melamine phosphate, lamellar mica powder, calcium formate, nano silicon carbide powder, rare-earth cerium fluoride, curing agent, adhesion promoter, viscosity regulating solvent, dispersing agent, leveling agent, coupling agent, defoaming agent and additive. The special high-temperature-resistant and high-absorption coating disclosed by the invention has the characteristics of good high-temperature resistance, ageing resistance and fatigue resistance, also has the advantages of high viscosity and crack resistance and the like; in addition, thecoating film is dense and neat and the adhesion is excellent.

The invention relates to a hydroxyapatite-containing injection filling preparation and a preparation method thereof, and belongs to the technical field of medical cosmetology and biomedical treatment.The hydroxyapatite-containing injection filling preparation is prepared from, by weight, 20-80 parts of hydroxyapatite, 1-20 parts of a gel substrate, 1-20 parts of an osmotic pressure regulating agent and 100 parts of a buffer salt solution. By using the hydroxyapatite-containing injection filling preparation prepared by using the method, the resistance time of the hydroxyapatite in vivo can beprolonged, hydroxyapatite particles are prevented from migrating on an injection site, the durability of hydroxyapatite microspheres on the injection site is improved, the irritation to tissue is low,after injection, the most natural effect can be achieved, the tissue of the injection site is soft, no indurations are caused, granuloma response is difficult to cause, and blemishes on skin can be quickly filled and lubricated.

Disclosed are a sunscreen composition comprising surface-defected cerium oxide particles and a method for preparing the sunscreen composition. The sunscreen composition comprising surface-defected cerium oxide particles has excellent bacterial-species killing ability, can have a high sun protection factor (SPF) and PA level, and can exhibit excellent dispersion stability since layer separation does not occur even if a long time passes.

The invention discloses a formula and a preparation method of a high-speed extruded PVC coated yarn color master batch. The color master batch comprises the following raw materials in parts by mass: 130-180 parts of polyvinyl chloride, 4-10 parts of a heat stabilizer, 0.5-3 parts of a light stabilizer, 7-15 parts of a main filler, 7-15 parts of an auxiliary filler, 1-4 parts of a dispersant, 0.5-4parts of a lubricant, 3-15 parts of a pigment and 13-23 parts of a plasticizer. The wire drawing speed of the PVC color master batch provided by the invention can reach 400 yards or above, meanwhile,the phenomena of color spots, non-uniform intermittent coating, eccentricity of coated wires and the like can be avoided, and the manufacturing cost of the color master batch can be greatly saved.

The invention discloses chemically-modified hard asphalt and a preparation method thereof. The chemically-modified hard asphalt comprises the following components in parts by weight: 100 parts of basic asphalt, 0.5-3.0 parts of polyphosphoric acid, 2-12 parts of ductility increasing agent mother liquor and 0.2-0.4 part of a surfactant. The preparation method comprises the following steps: adding polyphosphoric acid into the melted basic asphalt for chemically-modified reaction, then adding the ductility increasing agent mother liquor for further reaction, and finally adding the surfactant for further reaction for a period of time to prepare the chemically-modified hard asphalt. The whole process is implemented under a high-speed stirring condition. The chemically-modified hard asphalt prepared by the preparation method disclosed by the invention is high in flow resistance, high in softening point, high in low-temperature ductility, high in bonding property with aggregate, and excellent in high temperature stability, low temperature cracking resistance, fatigue resistance and water invasion resistance; the chemically-modified hard asphalt is particularly suitable for areas with high temperature, wet areas and areas with large diurnal temperature difference and can be used for paving a pavement of a traffic road, so that common pavement damage phenomena such pavement rutting, upheaval, fatigue cracking, low-temperature cracking and water invasion of the pavement are effectively prevented, and the service life of the pavement is prolonged.

The invention relates to method for improving 60 DEG C dynamic viscosity of pavement petroleum asphalt, which comprises the steps that atmospheric or vacuum residual oil serves as a raw material, is heated by a heating furnace, enters an asphalt tackifying reactor to be subjected to tackifying reaction, and then enters an atmospheric flash tower for separating out light gas oil; and oil at the bottom of the tower enters a vacuum heating furnace for heating, then enters a vacuum tower to be decompressed and fractionated. The vacuum residual oil at the bottom of the tower is the pavement petroleum asphalt product of which the viscosity is improved. Compared with the asphalt prepared by the same raw material and with a distillation method, the 60 DEG C dynamic viscosity of the pavement petroleum asphalt product prepared by the method with the same mark (the same needle penetration) is improved, so that the high-temperature property of the asphalt is improved.

The invention discloses an electromobile metal plate paint spraying process. The electromobile metal plate paint spraying process comprises the first step of preparation, the second step of paint spraying, the third step of drying, the fourth step of polishing and the fifth step of testing. According to the electromobile metal plate paint spraying process, the epoxy modified organic silicon resinserves as a main material supplemented with other auxiliary materials, the high-temperature resistance of a mixture is remarkably improved, the dynamic viscosity is large at the high-temperature environment, the raw materials interact and coordinate with one another, a composite effect is achieved, a system for improving the performance of paint is formed, the ageing resistance of the coating is good, a very high reflection effect on ultraviolet lights is achieved, meanwhile, the paint achieves an excellent flame retardant property, and experiments prove that high-temperature resistance is achieved when zinc phosphate powder and the epoxy modified organic silicon resin molecules are combined.

The invention relates to the technical field of rubber asphalt concrete, and particularly discloses rubber asphalt concrete which is prepared by mixing and stirring high-viscosity rubber asphalt and graded stone at a high temperature of 170-185 DEG C, paving and rolling. The high-viscosity rubber asphalt comprises the following components in parts by weight: 100 parts of asphalt, 5-15 parts of rubber powder, 2-7 parts of SBS, 0.5-3 parts of oxidized polyethlene wax, 0.04-0.4 part of a first crosslinking aid, 1-4 parts of aromatic hydrocarbon oil and 0.2-0.6 part of a second crosslinking aid. According to the scheme, the adhesive force (dynamic viscosity at 60 DEG C) between the rubber asphalt and the graded stone is high, and the prepared rubber asphalt concrete can meet the requirements of special asphalt pavements and has the advantages of better high temperature resistance, water damage resistance and the like.

The invention discloses novel high viscosity asphalt and a preparation method thereof. The novel high viscosity asphalt comprises the following raw materials in parts by weight: 100 parts of base asphalt with high asphaltene content, 0.1-1.2 part of polyphosphoric acid, 2-12 parts of a ductility improver mother liquid, 1-8 parts of a dispersant, and 0.2-0.5 part of a coupling agent. The preparation method comprises the following steps: adding the polyphosphoric acid in the molten base asphalt to perform a chemical modification reaction, then adding the ductility improver mother liquid, continuing to react, and finally adding the dispersant and the coupling agent to continue to react for a period of time to prepare high viscosity asphalt, wherein the whole process is performed under a highs-speed stirring condition. The high viscosity asphalt is high in 60-degree dynamic viscosity, high in softening point, high in low-temperature ductility, stable to store, and good in adhesion to aggregates, has excellent high temperature stability, excellent low temperature anti-cracking performance, excellent anti-fatigue performance and excellent water resistance, is especially suitable for high-temperature humid areas, areas with relatively high diurnal temperature difference, and paving of heavy-duty roads and drainable pavements, effectively prevents common pavement damages such as pavement rutting, pavement upheaval, pavement fatigue cracking, pavement cold cracking and water encroachment on pavements, and prolongs the service life of the pavement.

The invention discloses a preparation method of high-temperature-resistant asphalt concrete. The preparation method comprises the following steps: 1. pouring matrix asphalt into a reactor, heating thereactor to 300-320DEG C, then adding perfluoroelastomer rubber, hydrogenated acrylonitrile butadiene rubber, boron-silicon rubber, gum-based ester rubber and SBS thermoplastic elastomer, and stirringand reacting; 2. cooling the interior of the reactor to 200-220DEG C, adding furfural, asbestos powder, zinc oxide, silicon nitride, chromium carbide, aluminum-plated glass beads, calcium sulphate whisker powder and chlorinated paraffin, and stirring and reacting; 3. pouring the mixture, obtained in the step 2, into an ultrasonic dispersing machine, then adding composite resin, xylene, zinc naphthenate, Barium petroleum sulfonate, kerosene, lauroyl diethanolamine and promoter, and performing ultrasonic dispersion; and 4. shearing and dispersing the mixture, obtained in the step 3, stopping and then stirring for 30-50minutes at 150-160DEG C to obtain the high-temperature-resistant asphalt concrete.

The invention belongs to the field of auxiliaries for asphalt and relates to a warm mixing agent suitable for high-viscosity asphalt and a preparation method thereof. The warm mixing agent comprises the following substances in parts by weight: 5-30 parts of a surfactant, 1-25 parts of crystal wax, 1-25 parts of a polyethylene oligomer and 1-40 parts of a compatilizer. The high temperature viscosity of the high-viscosity asphalt doped with the warm mixing agent at a construction temperature can be greatly reduced; meanwhile, the 60-DEG C kinetic viscosity of the asphalt is greatly increased, the high-temperature property of the asphalt is improved, and other indexes of the asphalt also can meet the normative index requirements; from the view of a mixture, the warm mixing agent can still meet the compaction requirement under a condition of reducing the construction temperature by 20 DEG C, meanwhile, the high temperature stability of a drainage pavement asphalt mixture is improved, and the low-temperature crack resistance and water stability of the drainage pavement asphalt mixture have no obvious change.

Disclosed are an ultraviolet ray-shielding agent composition absorbing radiation in the UVA range and a method for preparing the ultraviolet light-shielding agent composition. Radiation in the UVA range, which is light in a wavelength band capable of affecting skin senescence, penetrates to the deep dermis. When used on the skin, the ultraviolet ray-shielding agent composition of the present invention absorbs the rays and as such, can prevent skin senescence.

The present invention provides a method for the preparation of a class of injectable gels having cohesion-enhancing properties after autoclaving. The chemically cross-linked amide bond in the system makes the gel have a strong ability to resist short-term high-temperature and high-pressure damage, and the free carboxyl and amino groups will form ionic bonds through electrostatic attraction due to the slow movement of the molecular chain, making the system sterilized. After a period of time, the dynamic viscosity continued to increase, and finally reached a plateau and exceeded the dynamic viscosity before sterilization. The enhanced cohesion endows the gel with good stability, which can maintain its shape for a long time without dispersion in a liquid environment. A suitable degree of crosslinking confers injectability to the gel. The enhanced cohesion and injectability make the gel system have strong application prospects in the field of biomedicine, especially in the direction of implantation in vivo, such as drug loading, filling, tissue repair, etc.

The invention relates to hyaluronic acid composite cross-linked hydrogel and a preparation method thereof. By combining the characteristic that an active group of hyaluronic acid can be used as a chemical modification site with the characteristic of polyanion electrolyte of hyaluronic acid, different groups and different spatial conformations of the substances such as 1,4-butanediol diglycidyl ether, polyethylene glycol, sodium alginate and gelatin are utilized to perform composite crosslinking and modifying with hyaluronic acid, and the proportion of each component is analyzed to determine the optimum formula of each component in the crosslinking reaction; the molecular weight of the prepared hyaluronic acid composite hydrogel is obviously increased, especially, the dynamic viscosity of the prepared hyaluronic acid composite hydrogel is remarkably increased. The hyaluronic acid composite cross-linked hydrogel prepared by the preparation method disclosed by the invention is great in molecular weight and great in dynamic viscosity, has the advantages of relatively strong space blocking effect and lubricating effect, good biocompatibility, good stability, and the like, and can be used for a tissue filling material, a lubricant in an articular cavity and a tissue adhesion preventing material of operation.

A process for preparing high-viscosity aramid fibre C resin includes reaction between p-phenyldiamine, M3 monomer and part of p-phenyl diformly chloride in N, N diformylacetylamine in which lithium chloride is dissolved to obtain the mother liquid of prepolymer, and reaction between said mother liquid and rest of p-phenyl diformly chloride. Its apparatus is composed of prepolymerizing reactor, polymerizing reactor, delivery pump and pipelines. Its advantage is high hot mass transfer effect.

Disclosed are an ultraviolet light shielding agent composition comprising cerium oxide (CeO2) particles having surfaces modified with polyhydroxystearic acid and a method for preparation of the ultraviolet light shielding agent composition. The ultraviolet light shielding agent composition comprising cerium oxide particles having surfaces modified with polyhydroxystearic acid can exhibit excellent dispersion stability even after the lapse of a long period of time.