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 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 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 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.

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 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 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.