32results about How to "Easy processing and application" patented technology

The invention discloses high ortho position formaldehyde phenol resin with elastic toughened, wherein, the elastic body reaches nm-level decentralization in the formaldehyde phenol resin, the content of the elastic body is 3 to 10 percent, and the ortho-para-ratio of the resin is 2.5 to 5. The invention also provides a preparation method of the formaldehyde phenol resin. The invention is characterized in that the high ortho position formaldehyde phenol resin with elastic toughened is prepared by adopting the way of in situ polymerization. Compared with the prior art, the high ortho position formaldehyde phenol resin with elastic toughened of the invention has the advantages of good fluidity, rapid curing and shaping, excellent toughness, simple preparation method, easy practice, etc.

The invention relates to an application of a polyurethane urea hydrogel with a shape memory function. The polyurethane urea hydrogel is a copolymer of polyethylene glycol, diisocyanate and diamine. The polyurethane urea hydrogel provided by the invention has a temperature response shape memory function and a water response shape memory function at room temperature, and is capable of realizing deformation generation, fixation and restoration under the conditions of room temperature and water medium by means of good tensile properties of the prepared hydrogel and crystalline phase transformation of PEG (Polyethylene Glycol) in the process of dehydration crystallization and water-absorption decrystallization. The polyurethane hydrogel also has the characteristics of large elongation rate and high tensile strength and has application prospects in biomedical hydrogels, tissue engineering, hydrogel bracket materials and biomedical devices endowed with the shape memory function.

The present invention discloses a printed circuit board and a method for fabricating the same, and an apparatus for fabricating printed circuit board. The printed circuit board includes a substrate having an upper surface; a first trench recessed from the upper surface of the substrate; a first via formed in the first trench and penetrating through the substrate; and a first conductive layer disposed in the first trench and the first via, the first trench being electrically connected to the first via. A method for fabricating the printed circuit board and an apparatus for fabricating the printed circuit board are also disclosed. The method and device utilize an ink-jet printing technology to fabricate the printed circuit board, can substantially simplify a technological process of the printed circuit board, and compared with a traditional technological process, can save many complex processes, improve the technological process and cost effectiveness, and reduce the pollution problem in a fabricating process.

The invention is suitable for the optical field, and provides a triply coated fiber, a pump combiner, a fiber grating and a fiber laser. A triply coated passive fiber comprises a fiber core, an innercladding layer covering outside the fiber core, an outer cladding layer covering outside the inner cladding layer, and a coating layer covering outside the outer cladding layer, the diameter of the fiber core is 10-50micrometer, the diameter of the inner cladding layer is 250-800micrometer, the diameter of the outer cladding layer is greater than the diameter of the inner cladding layer, the diameter of the outer cladding layer is 300-1000micrometer, or, the diameter of the inner cladding layer is 80-100micrometer, and the diameter of the outer cladding layer is 110-130micrometer. In the triply coated passive fiber, the outer cladding layer wrapping outside the inner cladding layer greatly reduces damage of pump light to the organic coating, the coating as a full reflection interface has ultrahigh damage threshold, so that the fiber laser is more reliable and stable.

The invention relates to degradable polyurethane urea containing multiple ureido groups and having excellent mechanical properties, a preparation method thereof and super-tough polyurethane urea basedthereon. The preparation method of the polyurethane urea includes: adding excessive diisocyanate and a catalyst into an organic solvent of oligomer diol and chain extender diol to carry out prepolymerization reaction, and then adding water as a chain extender for reaction. The content of ureido in a molecular chain can be regulated by adjusting the molar ratio of polyester diol to diisocyanate. The super-tough polyurethane urea can be further prepared on the basis of the polyurethane urea, molecular chain orientation is carried out on the super-tough polyurethane urea at high temperature, andthe super-tough polyurethane urea is fixed for a certain period of time under a tensile state at certain elongation, so that the molecular chain can be fully directionally arranged, thus further improving the mechanical strength. The polyurethane urea provided by the invention has the characteristics of high tensile strength and degradability, and has application prospects in the field of biomedical materials.

The invention discloses a methyl octabromoether flame-retardant polystyrene composite material and a preparation method thereof. The methyl octabromoether flame-retardant polystyrene composite material comprises, in parts by weight: polystyrene 70‑ 90 parts, 1‑10 parts of methyl octabromoether, 0.2‑5 parts of brominated flame retardant synergist, 1‑10 parts of phosphorus nitrogen flame retardant, 1‑10 parts of lubricating and dispersing agent, 1‑20 parts of filler. The invention also discloses a preparation method thereof. After the components are uniformly stirred, they are extruded through an extruder, and the temperature of the extruder is 170-210°C. In the present invention, methyl octabromoether is used to replace the commonly used polystyrene flame retardant hexabromocyclododecane, and phosphorus nitrogen flame retardants are added as a synergistic effect, so that the prepared polystyrene composite material has excellent flame retardancy In addition to flame performance, it has excellent mechanical properties, with tensile strength of 31.2-34.6MPa, bending strength of 42.3-47.0MPa, and limiting oxygen index of 30-39%.

The invention provides a catalyst for olefin polymerization, especially propylene polymerization. The titanium-containing catalyst component A selects a polyol ester compound with a special structure as a precipitation aid, and simultaneously uses a polyol ester compound or a binary The aromatic carboxylic acid ester compound is used as an electron donor, which saves the use of the traditional elution aid compound phthalic anhydride, eliminates the reaction step of dissolving the aid elution agent, reduces the complexity of catalyst component synthesis, and makes the catalyst preparation process more efficient. It is easy to control, and the obtained catalyst shows exciting polymerization activity and stereospecificity when used in propylene polymerization, and the polymer has less fine powder content and wider molecular weight distribution.

The invention relates to polyurethaneurea hydrogel and preparation methods therefor. The preparation methods comprise two preparation methods. The first preparation methods is as follows: diisocyanate and catalysts are added in a polyethylene glycol (PEG) organic solution for reaction, then diamine chain extender is added, and products are obtained in the organic solvent after precipitation, wherein, the molar ratio of PEG, diisocyanate and diamine is 1:2:1. The second preparation method is as follows: N,N'-dicarbonyl diimidazole is added in a PEG organic solution for reaction, then excess diamine chain extender is added, macromolecules with amidogens at two ends are obtained, finally, diisocyanate is added, and products are obtained in the organic solvent after precipitation, wherein, the molar ratio of PEG and diisocyanate is 1:2. The polyurethaneurea hydrogel has advantages of large elongation and high tensile strength, and has shape memory functions. The polyurethaneurea hydrogel has application prospects at aspects of biomedical hydrogel, tissue engineering, hydrogel support materials, biomedical devices with shape memory functions and the like.

The invention relates to the field of food processing, and aims at providing a method for preparing high-purity lutein ester by using tagetes extract. The method has the advantages that the sources ofthe raw materials are wide, the production cost is low, and the solvent can be reutilized. The method comprises the following steps of adding the tagetes extract into a supercritical CO2 (carbon dioxide) extracting tank, extracting and purifying, so as to obtain high-purity tagetes extract I; guiding the high-purity tagetes extract I into a stainless steel tank, adding ethyl acetate of which themass is equal to 5 to 10 times of the mass of the high-purity tagetes extract I, fully mixing and stirring, stirring for 30 to 45min at the temperature of 30 to 45 DEG C, enabling a high-speed centrifuging machine to centrifuge, and collecting precipitate II; adding an absolute ethyl alcohol solution of which the mass is equal to 5 to 6 times of the mass of the precipitate II into the stainless steel tank, mixing with the precipitate II, fully mixing the mixture, enabling the high-speed centrifuging machine to centrifuge, and collecting precipitate III; scraping the precipitate III into a stainless steel tray, uniformly dispersing, placing into a vacuum drying box, and drying under the vacuum condition, so as to obtain the finished product of the high-purity lutein ester.

The invention relates to a method for producing recombinant pigskin by using broken pigskin leftover materials, which comprises the following steps: (1) material selection; (2) acidolysis; (3) boiling; (4) filtering; (5) salination; (6) neutralization; (7) blending; (8) enzyme catalysis; (9) pouring and forming; and (10) air curing. The method uses broken pigskins including the broken pigskins produced through division processing, scourged pigskins, gore pigskins and the like as raw materials to produce the entire pigskin, and adopts a glutamine transaminage preparation to perform biocatalysis on the entire reaction system so as to achieve the recombination of the broken pigskins. Using the glutamine transaminage preparation to process the broken pigskins for recombination and forming, the recombinant pigskin cannot be re-dispersed due to freezing, slicing, stewing, cooking and the like. The method recombines the pigskins for reuse, which not only revalues the pigskins, but also reduces pollutions to the environment. The formed recombinant pigskin is convenient for processing and application, can substitute the prior pigskins in the process of low-temperature meat product processing, and greatly reduce the production cost.

The invention relates to a tandem type continuous rubber mixing device, belonging to the technical field of rubber production equipment. The tandem type continuous rubber mixing device is of an upper and lower layer type structure integrally; a rack I and a rack II are fixedly connected to a base II through bolts respectively; a base I is fixedly connected with an internal mixer used for initially mixing rubber materials through bolts; an anisotropic dual-rotor continuous mixer is fixedly arranged on the rack I and the rack II through bolts for performing two-section mixing; the lower end of the internal mixer is in butt joint with the upper end of the anisotropic dual-rotor continuous mixer through a storage hopper in a communicating manner; the upper end of the left side of the storage hopper is connected with the base I through bolts; the upper end of the right side of the storage hopper is fixedly provided with an oil cylinder II through bolts; a weight is arranged at the lower end of the oil cylinder II in a connecting manner through a transmission rod and used for pressing initially mixed rubber in the storage hopper, which is discharged from the internal mixer, into the anisotropic dual-rotor continuous mixer. The tandem type continuous rubber mixing device is simple in structure, simple and convenient to assemble, high in controllability, low in energy consumption, mature in technology and convenient to machine and apply.

The invention discloses an HfC / C ceramic precursor polymer material and a preparation method thereof. The polymer has a coordination structure of hafnium and tetraiminetetraphenol, and can be pyrolyzed and converted into HfC / C ceramics at a temperature above 1600° C., and its ceramic yield is not lower than 55 wt%. The preparation method of the polymer is to synthesize the hafnium source compound and the tetraimine tetraphenol monomer through a one-pot polymerization reaction. The polymer precursor prepared by the invention is expected to be used as an impregnated matrix for ceramic matrix composite materials and anti-oxidation carbon / carbon composite materials, so as to improve their ultra-high temperature anti-oxidation properties.

The invention relates to a devolatilization method and equipment of thermoplastic elastomers. Water colloidal particles after the vibration dehydration are directly fed in a conical centrifugal dryer of a primary drying station for devolatilizing; dry colloidal particles after the devolatilization are fed in a pelletizing station, are pelletized by a screw extruder, and are fed in a conical centrifugal dryer of a secondary drying station for further drying; the drying hot wind temperature is 40-120 DEG C, and the wind volume is 10-600 L / s; the extruding temperature of the screw extruder is 100-200 DEG C, and the extruding pressure is 1-10 MPa; screen holes are formed in the screen surface of the conical centrifugal dryer for drying; small screen ports are connected with a driving bearing, and large screen ports are connected with a driven bearing; the driving bearing is driven through power equipment to rotate; and the conical centrifugal dryers are additionally provided with hot wind pipes, exhaust ports, cleaning ports and liquid level tanks. The method has such advantages as short technological process, less equipment floor, thorough devolatilization, stable index control, low content of product gels and large bulk density.

The invention relates to the field of preparation of cross-linked grafted polyethylene by high melt index polyethylene, and discloses a crosslinkable grafted polyethylene composition, a cross-linked grafted polyethylene product, a preparation method thereof, and a product thereof. The composition comprises polyethylene, a cross-linking agent, a cross-linking assistant, a stabilizer, a processing modifier, an antioxidant and a lubricant; the melt index of the polyethylene at 190 DEG C at a load of 2.16 kg is more than 30 g / 10 min, the stabilizer is at least one kind of free radical stabilizers selected from the group consisting of phosphorous acid tri(2,2,6,6-tetramethyl-1-piperidinyloxy)ester, 2,2-di(4-tert-octylphenyl)-1-pierylhydrazine and nitrogen-oxygen free radical piperidycol; the processing modifier is at least one kind of compounds selected from the group consisting of methacrylic anhydride, glycidyl methacrylate, acrylic anhydride, maleic anhydride, maleic anhydride monoester, succinic anhydride, succinic anhydride monoester, fumaric acid anhydride and fumaric anhydride monoester. The high-melt-index polyethylene can be processed into the cross-linked grafted polyethylene product, and the focal burning time window is wide.

The invention discloses a polystyrene-b-polyisoprene / tackifying resin composite rubber particle and a preparation method and application thereof. The composite rubber particle comprises polystyrene-b-polyisoprene and tackifying resin components. The preparation method includes: preparing polystyrene-b-polyisoprene sol in an anionic polymerization system, adding tackifying resin into the sol, dissolving, mixing and performing condensation, solvent removal and granulation to obtain the polystyrene-b-polyisoprene / tackifying resin composite rubber particle. The composite rubber particle is free ofcold flow and adhesion at the room temperature and has a great self-adhesion performance under the action of rubber oil, and the tackifying resin composite rubber particle is great in resistance to high and low temperatures and excellent in sand and concrete surface adhesion performance in high-wax high-softening-point asphalt modification, is also high in water resistance and ductility and realizes expansion of high-wax asphalt application.

The invention discloses an HfC / C ceramic precursor polymer material and a preparation method thereof. The polymer has a coordination structure of hafnium and tetramine tetraphenol, and can be pyrolyzed and converted into HfC / C ceramic at the temperature of 1600 DEG C or above, and the ceramic yield is not lower than 55 wt%. The preparation method of the polymer is characterized in that a hafnium source compound and a tetraimine tetraphenol monomer are subjected to a one-pot polymerization reaction to synthesize the polymer. The polymer precursor prepared by the method is expected to be used asa dipping matrix of a ceramic matrix composite material and an antioxidant carbon / carbon composite material so as to improve the ultrahigh-temperature oxidation resistance of the ceramic matrix composite material and the antioxidant carbon / carbon composite material.

The invention discloses a one-component room temperature vulcanized fluorosilicone rubber, which is made of the following raw materials in parts by weight: 100 parts of hydroxyl-terminated fluorine-containing polysiloxane; 1-30 parts of inorganic filler; 3-30 parts of crosslinking agent 15 parts; 2-5 parts of silane coupling agent; 0-3 parts of titanate coupling agent; 0.1-0.5 parts of catalyst; 0-2 parts of methyl fluorine-containing silicone oil. The one-component room temperature vulcanized fluorosilicone rubber is in a closed high-speed disperser under the protection of dry nitrogen at room temperature, and the raw materials are evenly dispersed and then sealed in a package. The one-component room temperature vulcanized fluorosilicone rubber of the present invention has excellent oil resistance and good sealing and bonding performance, and can be used for fuel-resistant seals such as aircraft and automobile fuel tank seals, oil depots and oil tanker pipeline seals, and can be cured into elasticity at room temperature It is easy to process and apply, and has good performance. It is an indispensable oil-resistant sealing material for my country's aviation industry and automobile industry.

The invention discloses a polystyrene-b-polyisoprene / tackifying resin composite rubber particle and a preparation method and application thereof. The composite rubber particle comprises polystyrene-b-polyisoprene and tackifying resin components. The preparation method includes: preparing polystyrene-b-polyisoprene sol in an anionic polymerization system, adding tackifying resin into the sol, dissolving, mixing and performing condensation, solvent removal and granulation to obtain the polystyrene-b-polyisoprene / tackifying resin composite rubber particle. The composite rubber particle is free ofcold flow and adhesion at the room temperature and has a great self-adhesion performance under the action of rubber oil, and the tackifying resin composite rubber particle is great in resistance to high and low temperatures and excellent in sand and concrete surface adhesion performance in high-wax high-softening-point asphalt modification, is also high in water resistance and ductility and realizes expansion of high-wax asphalt application.

The invention relates to the field of food processing, and aims at providing a method for preparing high-purity lutein ester by using tagetes extract. The method has the advantages that the sources ofthe raw materials are wide, the production cost is low, and the solvent can be reutilized. The method comprises the following steps of adding the tagetes extract into a supercritical CO2 (carbon dioxide) extracting tank, extracting and purifying, so as to obtain high-purity tagetes extract I; guiding the high-purity tagetes extract I into a stainless steel tank, adding ethyl acetate of which themass is equal to 5 to 10 times of the mass of the high-purity tagetes extract I, fully mixing and stirring, stirring for 30 to 45min at the temperature of 30 to 45 DEG C, enabling a high-speed centrifuging machine to centrifuge, and collecting precipitate II; adding an absolute ethyl alcohol solution of which the mass is equal to 5 to 6 times of the mass of the precipitate II into the stainless steel tank, mixing with the precipitate II, fully mixing the mixture, enabling the high-speed centrifuging machine to centrifuge, and collecting precipitate III; scraping the precipitate III into a stainless steel tray, uniformly dispersing, placing into a vacuum drying box, and drying under the vacuum condition, so as to obtain the finished product of the high-purity lutein ester.

The invention relates to the application of a polyurethane urea hydrogel with shape memory function. The hydrogel is a copolymer of polyethylene glycol, diisocyanate and diamine. The polyurethane urea hydrogel provided by the present invention not only has a temperature-responsive shape memory function, but also has a water-responsive shape memory function at room temperature, and can also rely on the good tensile properties of the prepared hydrogel and the dehydration crystallization-absorption decrystallization process of PEG The deformation generation, immobilization and recovery under the conditions of room temperature and aqueous medium are realized by the accompanying crystalline phase transition in the material. It also has the characteristics of large elongation and high tensile strength, and has application prospects in biomedical hydrogels, tissue engineering, hydrogel scaffold materials, and biomedical devices endowed with shape memory functions.