113results about How to "Prevent discoloration" patented technology

The invention discloses a preparation method and application of high-water-solubility dihydroquercetin for cosmetics, and belongs to the technical field of compound extraction.The preparation method comprises the steps that larch roots are dried and smashed, soaked in cold water and filtered, filter residues are extracted through plate-frame pressure filtration, an extracting solution is concentrated, alcohol precipitation is conducted, an alcohol solution is concentrated and refrigerated till crystals are separated out, and the high-water-solubility dihydroquercetin is obtained. Adding the crystal into an inclusion solution, filtering after reaction, adding a composite decolorizing agent into the filtrate, filtering again, adjusting the pH value to be neutral, diluting until the solid content of the filtrate is 3 + / -0.5%, passing through a column, concentrating, and spray-drying to obtain the high-water-solubility dihydroquercetin for cosmetics, which is in a powder state and light in color. The composition has a good anti-wrinkle effect, a tightening effect and a soothing effect, and can be used for preparing cosmetics.

The invention belongs to the technical field of coatings, and discloses an anti-yellowing and high-hardness UV (ultraviolet) laminating varnish as well as a preparation method and application thereof. The UV film coating varnish comprises six-functionality alicyclic polyurethane acrylic resin, two-functionality linear polyurethane acrylic resin, pure acrylic resin, an acrylate reactive diluent, a filler, an ultraviolet light absorber, a non-alkaline hindered amine free radical scavenger and a photoinitiator. The weight ratio of the six-functionality alicyclic polyurethane acrylic resin to the two-functionality linear polyurethane acrylic resin to the pure acrylic resin to the acrylate reactive diluent is (2.5-3.5): (1-1.5): 0.5: (2.0-3.0); the bifunctional linear polyurethane acrylic resin is prepared from the following raw materials: isocyanate, poly (1, 4-butanediol) and hydroxyethyl acrylate. A paint film formed by the UV film-coated varnish has good yellowing resistance and high hardness, and is not easy to crack after thermal cycling.

The invention relates to the field of printing ink, and discloses UV fission printing ink for outer packaging of cigarette cases and a preparation method of the UV fission printing ink. The UV fission ink is prepared from the following raw materials in percentage by weight: 32 to 50 percent of polyurethane acrylate, 30 to 40 percent of functional monomer, 6 to 10 percent of active amine, 4 to 8 percent of photoinitiator, 6 to 8 percent of fission regulator, 2 to 4 percent of polyethylene wax, 0.5 to 1 percent of defoaming agent and 1.5 to 3 percent of flatting agent. The fission regulator is prepared from fumed silica, polydipentaerythritol hexaacrylate, a silane coupling agent and a dispersing agent. The UV fission ink prepared in the invention keeps good fluidity, irregular wrinkle structures or pattern edges formed by printing are not easy to deform, the UV fission ink has good stereoscopic impression and clear lines, and the wrinkle structures or pattern edges are not easy to discolor and fall off.

The invention discloses a low-temperature storage and preservation method for litchis. The method comprises the following steps of: removing branches and leaves of fresh litchis which are 80-90% mature, and reserving bare litchis; the fruits pass through a sorting line, and defective fruits are picked out; and soaking the lychee in an ergothioneine and mannitol solution, draining water, packaging the lychee with a moisture-permeable and air-permeable functional fresh-keeping bag, and storing the lychee at the temperature of-1 DEG C to 5 DEG C. According to the fresh-keeping method combining ergothioneine, mannitol and a moisture-permeable and air-permeable functional fresh-keeping bag, the fresh-keeping period of the litchis can be effectively prolonged through natural oxidation resistance and hydration and by matching with humidity adjustment and gas exchange, and the flavor, texture and nutritional ingredients of the litchis are kept. The method not only meets green and environment-friendly requirements, but also can remarkably reduce loss of litchis in transportation and storage, reduce food waste and improve food safety, and is an advanced and efficient fruit fresh-keeping technology.

The invention provides a preparation method and application of a skin care product rich in ergothioneine and nicotinamide, and belongs to the technical field of skin care products.According to the scheme, an ergothioneine solution is treated with a stabilizer, the pH value of a nicotinamide solution is adjusted, tea polyphenol is added, stability is improved, specific temperature, humidity and containers are specified in the storage link, and deterioration is prevented; ergothioneine and nicotinamide synergistically exert multiple effects to meet various requirements of consumers, the preparation process is scientific and reasonable, segmented stirring and temperature control are performed, specific components are added and treated, the product quality is ensured, finally, a high-temperature instantaneous sterilization method is adopted, the product safety and stability are ensured, the microbial index standard is met, and in a word, the preparation method is suitable for industrial production. The invention has obvious advantages and wide market prospect.

The invention discloses a corrosion resistance detection device and a corrosion resistance detection method for an automotive interior material, and relates to the technical field of corrosion resistance detection. The invention discloses a corrosion resistance detection device and a corrosion resistance detection method for an automotive interior material. Comprising a material plate to be detected, a test box, a control table fixed on the side wall of the test box, a storage box fixed in the control table and used for storing a test solvent, a material conveying pump fixed in the control table and used for conveying the test solvent, and a solvent spray head mounted in the test box and used for spraying out the test solvent, the conveying pipe is communicated with the material conveying pump and the solvent spraying head, the box cover is movably installed on the top of the testing box, and a switching assembly used for switching the area where the material plate is located, an auxiliary assembly used for assisting the switching assembly to operate and an exhaust assembly used for shortening the switching time are arranged in the testing box. Seamless connection from a salt spray test to sample cleaning is realized, the sample transfer time and operation steps are reduced, and the overall working efficiency is improved.

The invention discloses an anti-discoloration solid ceramic chip, a solid ceramic perfumed chip and a preparation method of the solid ceramic perfumed chip. The anti-discoloration solid ceramic chip is prepared from the following raw materials in parts by weight: 75-80 parts of powder, 7-10 parts of plant fiber, 1-2 parts of titanium dioxide, 1-2 parts of titanium dioxide, 1-2 parts of silicon dioxide, 1-2 parts of zinc oxide, 1-2 parts of mica powder, 1-2 parts of talcum powder, 3-4 parts of pressing gel, 1-2 parts of a release agent, 1-2 parts of deionized water and 1-2 parts of a dispersing agent. Tests show that the anti-discoloration solid ceramic perfumed sheet prepared by the invention can avoid the discoloration problem of aromatherapy powder caused by high temperature, essence, iron ions and the like, and compared with a common ceramic perfumed sheet, the anti-discoloration solid ceramic perfumed sheet disclosed by the invention has better color stability and aesthetic property, so that the anti-discoloration solid ceramic perfumed sheet is more competitive in the market.

The utility model discloses a flexible lamp strip capable of emitting light from the side face. The flexible lamp strip comprises a lower heat dissipation frame, an upper heat dissipation frame and a fixing groove. A placement cavity is formed in the surface of the lower heat dissipation frame, and an inner shell is arranged in the placement cavity; the upper heat dissipation frame is arranged at the top of the inner shell, and a light emitting flat plate is connected between the lower heat dissipation frame and the upper heat dissipation frame in a sliding mode; the lamp strip substrate with the LED lamp beads is placed in the fixing groove in the inner shell, the inner shell is placed between the lower heat dissipation frame and the upper heat dissipation frame, the light-emitting flat plate is connected between the lower heat dissipation frame and the upper heat dissipation frame in a sliding mode, installation of the light-emitting flat plate is completed, the countersunk screws are screwed in respectively, and the light-emitting flat plate is fixed through the fixing groove. One end of the countersunk head screw enters the lower heat dissipation frame and the upper heat dissipation frame, so that the light emitting flat plate can be fixed; light emitted by the LED lamp beads is refracted through the tooth-shaped stripes, so that the light-emitting angle of the LED lamp beads is wider, the light-emitting flat plate is used in a matched mode, light emitted by the lamp strip is more uniform, and the light-emitting efficiency of the LED lamp strip is effectively improved.

The present disclosure provides a pharmaceutical composition comprising buprenorphine, a derivative thereof, or a pharmaceutically acceptable salt thereof, a stabilizer, a biocompatible solvent, and at least one compound represented by Formula (IIA), Formula (IIB), or Formula (IIC) wherein R1 is hydrogen, C1-C20 alkylcarbonyl, or C6-C18 arylcarbonyl, and wherein within the shelf life of the pharmaceutical composition, R1 is hydrogen, C1-C20 alkylcarbonyl, or C6-C18 arylcarbonyl, R2 is hydrogen, C1-C20 alkylcarbonyl, or C6-C18 arylcarbonyl, and R3 is hydrogen, C1-C20 alkylcarbonyl, or C6-C18 arylcarbonyl. The amounts of the compounds of formula (IIA), formula (IB), and formula (IIC) are each less than 1% w / w based on the total weight of the pharmaceutical composition. The disclosure also provides a method of making the pharmaceutical composition and a method of administering the pharmaceutical composition to a subject in need thereof to treat opioid addiction, pain, and / or depression. # imgabs0 #

The utility model belongs to the technical field of chemical equipment, and discloses a filter press purging device for dimer acid production, which comprises a buffer tank, the top of the buffer tank is provided with an air inlet, an air outlet and a pressure sensor interface, and the air inlet and the pressure sensor interface are respectively communicated with an air inlet regulating valve and a pressure sensor through pipelines; a demisting grating is arranged on the upper portion of an inner cavity of the buffer tank, a buffer tank feeding port is formed in the side wall of the buffer tank on one side of the lower portion of the demisting grating, a window is arranged on the lower portion of the buffer tank feeding port, and a liquid level meter is arranged on the lower middle portion of the side wall of the buffer tank. A heat preservation coil pipe is arranged at the bottom of an inner cavity of the buffer tank; a buffer tank discharge port in the bottom of the buffer tank is communicated with a transfer pump through a pipeline; the air outlet is sequentially communicated with a centrifugal fan and a feed port of a filter press through pipelines, and a discharge port of the filter press is communicated with a feed port of the buffer tank through a pipeline. The device is simple in structure, convenient to operate, low in energy consumption and capable of improving the product quality.

The embodiment of the utility model discloses an electric toothbrush handle and an electric toothbrush. The electric toothbrush handle comprises a shell and a sealing rubber sleeve, the shell is provided with a containing cavity and an avoiding hole communicated with the containing cavity, and the avoiding hole is used for a motor shaft to penetrate through; and the sealing rubber sleeve is arranged in the avoiding hole, the sealing rubber sleeve is used for sealing a gap between the hole wall of the avoiding hole and the motor shaft, and an antibacterial structure is arranged at the end, exposed out of the shell, of the sealing rubber sleeve. According to the electric toothbrush handle disclosed by the embodiment of the utility model, the sealing rubber sleeve can be prevented from being polluted by bacteria, and the healthy and sanitary conditions of the handle are improved. The electric toothbrush disclosed by the embodiment of the invention comprises the electric toothbrush handle.

The invention discloses a steel structure rust removal device for a construction site. The steel structure rust removal device comprises a walking plate trailer, a stirring box, a water storage box, a material storage box, a high-pressure pump, a liquid conveying pipe and an air compressor. The stirring box is fixed on the top surface of the walking plate trailer; a liquid outlet is formed in the bottom of one side wall of the stirring box; a water outlet communicated with the inner cavity of the stirring box is formed in the bottom wall of the water storage box; grinding materials are contained in the storage box, and a discharging gate is hinged to the bottom end of the storage box so that the grinding materials can be put into the stirring box and stirred and mixed with water to form grinding liquid; the high-pressure pump is fixed on the outer wall of the stirring box; an inlet of the high-pressure pump communicates with the liquid outlet; one end of the liquid conveying pipe is detachably connected with an outlet of the high-pressure pump, and a high-pressure nozzle is fixed at the other end; the air compressor is fixed to the top face of the walking plate trailer to provide high-pressure air, and an air outlet of the air compressor communicates with the liquid conveying pipe through an air pipe. Water and grinding materials are stirred to form mixed grinding liquid, the mixed grinding liquid is sprayed to the surface of the steel structure through high pressure for rust removal operation, and secondary pollution to the environment is avoided.

The invention discloses a compound antioxidant and a preparation method thereof. The compound antioxidant comprises the following raw materials: 50-100g of copper sulfate; 150 to 200 ml of sodium sulfite; 15 to 20g of disodium ethylene diamine tetraacetate; 5-10 g of sodium dodecyl benzene sulfonate; and 500 to 1000 ml of deionized water. The composite antioxidant is prepared by the following process steps: fully dissolving 50-100g of copper sulfate in 1L of deionized water, and uniformly stirring. Slowly adding 150-200ml of sodium sulfite into the copper sulfate solution, controlling the reaction temperature within 30-50 DEG C, and continuously stirring for 1-2 hours until the reaction is complete. Adding 15-20g of disodium ethylene diamine tetraacetate into the solution, and stirring for 1 hour to improve the stability of the antioxidant. And then adding 5-10g of sodium dodecyl benzene sulfonate, and stirring for 1 hour. And finally, removing impurities in the solution in a suction filtration or filtration manner to obtain the composite antioxidant. The composite antioxidant is safe, environmentally friendly and high in applicability, oxidation reaction of copper can be effectively inhibited to a certain extent, and the shelf life of the product is prolonged.

An arrangement for the degradation stable storage and transport of a liquid comprising a non-substituted saturated aliphatic C6-12 carboxylic acid in which the liquid is surrounded by a metallic container and covered with an oxygen free or at least heavily oxygen depleted inert gas phase atmosphere above the liquid.

The utility model discloses a safety type multi-chamber peritoneal infusion bag, and relates to the field of medical devices. A safety type multi-chamber peritoneal infusion bag comprises a bag body used for infusion. The infusion cavities are formed in the bag body and used for containing liquid medicine; the isolating strip is formed by welding an upper layer and a lower layer of the bag body and used for separating the infusion cavities, and when the infusion cavities are extruded by external force, the upper layer and the lower layer of the isolating strip are separated so that the adjacent infusion cavities can be communicated; the safety chamber is arranged on the bag body and is separated from the infusion chamber through an isolating strip; the number of the liquid filling openings is the same as that of the infusion cavities, and each liquid filling opening is communicated with one infusion cavity; the easily-broken plug is connected with the liquid filling opening and is used for closing the liquid filling opening when infusion is not carried out to the infusion cavity; the liquid guide port is communicated with the safety chamber and is used for guiding out the liquid medicine; and the breaking plug is connected with the liquid guide port and is used for closing the liquid guide port when the liquid medicine is not output. According to the utility model, the problems of inconvenience and sterile risk of the dosing plug opening are solved.

The invention belongs to the field of daily chemicals, and discloses a supramolecular composition which comprises the following components in parts by weight: 35-40 parts of betaine; 25 to 35 parts of dihydric alcohol; and 30-40 parts of vitamin C. The composition adopts the betaine, the dihydric alcohol and the vitamin C to form a supramolecular structure, and the dihydric alcohol is mixed and melted with the betaine, so that the dihydric alcohol and the vitamin C can form the supramolecular structure by a conventional synthesis method, and VC discoloration is effectively inhibited. Meanwhile, the invention further provides a composition based on a supramolecular structure and capable of resisting VC discoloration, and in the application process, plant extracts are supplemented, so that better whitening and brightening effects can be achieved. In addition, the invention further discloses application of the composition and cosmetics.

The invention discloses an optical metal surface extinction blackening treatment method which comprises the following steps: (1) firstly, performing thermal degreasing on a treated workpiece for 1-10 minutes, and cleaning for 2-5 times; (2) the treated workpiece is placed in a blackening pool for blackening treatment, the blackening temperature ranges from 50 DEG C to 200 DEG C, the blackening time ranges from 5 min to 20 min, and the workpiece is cleaned 2-5 times and dried at the temperature of 120 DEG C for 30 min to 90 min; (3) the blackened workpieces are tidily placed on a material disc manually or through a vibration disc or through a mechanical arm; (4) mixing graphene, purified water and silicon dioxide according to the weight ratio of 5: 60: 0.2, grinding in a nano grinder, and filtering by using a filter of 3 microns or less for later use; according to the technical scheme, compared with a comparison file, discoloration and chromatic aberration are thoroughly eliminated; and the outdoor and vehicle specification technical specifications are reached or exceeded.

The invention discloses a nylon material and its preparation method and application. The raw materials for preparation include: nylon material, flame retardant synergist, heat stabilizer, poly-olefin graft copolymer; nylon material includes polyphthalamide, polylaurolactam derivative, polyhexamethylene adipamide; the raw materials for preparation of polyphthalamide include phthalic acid and isophthalic acid mixture; flame retardant synergist includes at least one of modified MMP, lanthanum oxide, silicon flame retardant, zinc borate, stannate and MCA; modified MMP is MMP with silicone oil coated on the surface; heat stabilizer includes one of S-EED, Lugman H10, cuprous iodide and potassium iodide; poly-olefin graft copolymer includes at least one of grafted SEBS, grafted POE and grafted PE. The nylon material of the invention solves the problems of the welding material in the existing SMT surface mounting equipment technology that is easy to turn yellow at high temperature, the bonding line strength is low, and the welding time is easy to blister.

The invention belongs to the technical field of electrolyte additives, and particularly relates to an estersil compound and a preparation method and application thereof. Wherein the general formula of the estersil compound is as shown in formula (I) to formula (IV), R1 is methyl, ethyl, isopropyl, vinyl or phenyl, and R2 is CH2 = CH <->, CH3 <->, CH3CH2 <->, (CH3) 2CH <->, (CH3) 3C <-> or H <->. The estersil compound provided by the invention can be used as an electrolyte additive, and can inhibit discoloration of an electrolyte in an electrochemical device, so that the storage time is prolonged, and the comprehensive performance of the electrochemical device is improved.

The utility model discloses a light-emitting diode packaging structure, and relates to the technical field of light-emitting diode packaging. In the light-emitting diode packaging structure, a bracket is provided with a mounting groove, and the bottom of the mounting groove is provided with a conductive layer; the light-emitting diode chip is arranged in the mounting groove and is electrically connected to the conductive layer; the anti-vulcanization layer is arranged in the mounting groove and covers the conductive layer; the fluorescent part is arranged in the mounting groove and covers the anti-vulcanization layer and the light-emitting diode chip, and the fluorescent part comprises a colloid matrix and fluorescent powder; wherein the fluorescent part at least comprises a first fluorescent layer, a centrifugal precipitation layer is formed at the bottom of the first fluorescent layer, and a light-transmitting layer is formed at the top of the first fluorescent layer; and the fluorescent powder concentration of the centrifugal precipitation layer is higher than that of the light-transmitting layer. The light emitting efficiency of the light emitting diode packaging structure can be improved.

The invention discloses a mildew-proof diatomite absorbent pad and a preparation method thereof, and relates to the technical field of absorbent pads and preparation methods thereof. The mildew-proof diatomite absorbent pad comprises the following raw materials: 15-20% of quartz, 50-65% of diatomite, 5-10% of paper pulp fiber, 1-3% of environment-friendly color paste and 7-19% of limestone. The preparation process comprises the following steps: adding water into the raw materials, grinding, mixing, stirring, vibrating by a vibrating screen, performing vacuum dehydration, compressing and dehydrating, cutting, performing high-temperature and high-pressure treatment, drying, sanding, cutting, washing a plate with a mildew preventive, drying, engraving, and performing color printing to obtain a finished product. By optimizing the raw materials, the proportion and the preparation method of the water-absorbing pad and optimizing the existing mildew preventive, the problems that the existing diatomite water-absorbing pad is high in preparation cost, insufficient in flexibility and not quick to dry, and the appearance is easily influenced by using a silver-containing mildew preventive are solved; the diatomite absorbent pad prepared by the method has the advantages of quick drying, high strength, hardness but flexibility, good formaldehyde removal effect, high stability and good mildew-proof and sterilizing effects.

The utility model provides an anti-deterioration chemical raw material storage device which comprises a tank body, a cover plate is fixedly connected to the upper portion of the tank body, one end of the cover plate is fixedly connected with a feeding port, one end of the feeding port is in threaded connection with a sealing plate, the lower end of the sealing plate is fixedly connected with an antioxidant bottle, and one end of the antioxidant bottle is fixedly connected with a liquid spraying pump. One end of the liquid spraying pump is fixedly connected with a liquid spraying pipe, one side of the liquid spraying pump is fixedly connected with a control part and a power supply part, one ends of the control part and the power supply part are electrically connected to the liquid spraying pump, and one end of the liquid spraying pump is fixedly connected with a side bracket; during long-term storage, the control component starts the liquid spraying pump at regular time to spray the antioxidant to the polyester polyol below so as to prevent the polyester polyol from being oxidized to cause color change in the long-term storage process, and meanwhile, the guide side plate is arc-shaped and is placed below the liquid spraying pipe, so that the spraying direction of the antioxidant water flow sprayed from the upper part can be changed; and the antioxidant is sprayed to more areas in the tank body, so that the antioxidant is sprayed more uniformly.

The invention discloses a PET (Polyethylene Terephthalate) recycling and granulating system and a recycling and granulating method thereof, the system comprises a PET bottle flake drying and purifying device for drying bottle flakes by using infrared rays and then purifying the bottle flakes by using hot nitrogen; then the bottle chips purified by the purifying machine are conveyed into an extruding machine through a second bottle chip conveying device to be extruded, the bottle chips are pelletized, dehydrated and then tackified in a tackifying unit, the tackifying unit adopts a single-pot type infrared dehumidifying, crystallizing and drying all-in-one machine, and the bottle chips directly enter a tackifying machine for tackifying by hot nitrogen after being heated and crystallized by infrared rays; according to the recycling and granulating system and method, infrared heating, drying and purifying are carried out through the continuous infrared drying machine and the purifying machine before extrusion and granulation, moisture and low-molecular-weight substances in bottle chips are removed, the overall efficiency is higher, the purifying effect is better, then tackifying treatment is carried out through heated nitrogen, contact with oxygen is avoided, and the service life of the bottle chips is prolonged. The color of the final PET particles is not yellow.

The invention belongs to the technical field of sugar alcohol compositions, and particularly relates to a sugar alcohol composition containing lutein ester and a preparation method of the sugar alcohol composition. The sugar alcohol composition containing the lutein ester is prepared from the following components: 1.2 to 4.5 parts of gelatin, 30 to 36 parts of crystalline sugar alcohol, 38.6 to 44.2 parts of non-crystalline sugar alcohol, 2 to 6 parts of non-reducing sugar, 1 to 2 parts of glycerol, 1 to 2.3 parts of an emulsifier, 4 to 10 parts of grease, 0.2 to 0.6 part of lutein ester powder, 4 to 8 parts of sugar-free blueberry powder, 0.07 to 1.45 parts of an acidity regulator, 0.6 to 1.1 parts of blueberry essence powder, 2 to 4 parts of concentrated blueberry juice and 49.2 to 57.4 parts of water. The preparation method comprises the following steps: respectively preparing a gelatin solution, a mixture A, a mixture B, a mixture C and syrup for later use; and adding a gelatin solution into the syrup, stirring, sequentially adding the mixture A, the mixture B, the mixture C and the sugar-free blueberry powder, uniformly stirring, cooling, and finally preparing the sugar alcohol composition containing the lutein ester. According to the sugar alcohol composition, the sugar alcohol and other raw materials are reasonably selected and proportioned, and the problems that an existing sugar alcohol composition is not easy to form and prone to water loss, hardening and discoloring are solved.

The utility model provides an automatic tea picking machine which comprises a picking action mechanism, the picking action mechanism comprises a shell and a bionic mouth clamp arranged on the front side of the shell, the bionic mouth clamp is composed of an upper clamp body and a lower clamp body which are vertically symmetrical, the upper clamp body and the lower clamp body are rotationally connected with the front side of the shell respectively, and an upper blade and a lower blade are arranged on the front sides of the opposite sides of the upper clamp body and the lower clamp body respectively. When the bionic mouth clamp is closed, the upper blade and the lower blade perform cutting action; the picking driving mechanism is arranged in the shell and used for driving the bionic mouth clamp to be closed or opened; the collecting mechanism comprises a backpack, a suction mechanism is arranged in the backpack, the backpack is communicated with the interior of the shell through a pipeline, and when the bionic mouth clamp is closed, a cavity formed in the bionic mouth clamp is communicated with the interior of the shell. The tea leaf picking machine is light and easy to operate, the backpack and the suction mechanism can automatically collect tea leaves, physical labor is relieved, the duckbilled scissors complete the pruning and temporary storage process, the size of the duckbilled scissors is suitable for the tea leaves with the average size, and the accurate picking precision and quality are guaranteed.

The invention discloses a ureido-containing compound and a preparation method and application thereof.The structure of the ureido-containing compound contains a ureido structure, a double-bond structure and a nitrogen heterocyclic structure, and the preparation method of the ureido-containing compound is simple; the modulus and resolution of the photosensitive resin sheet can be improved by adding the photosensitive resin sheet into the photosensitive resin sheet, the adhesiveness of the photosensitive resin sheet with a base material after being cured at a low temperature of 200 DEG C can be improved, and the discoloration of a copper or copper alloy base material can be inhibited.

The utility model discloses a color master batch preparation device, and particularly relates to the technical field of color master batch preparation, the color master batch preparation device comprises a shell, and a mixing assembly is mounted in the shell; the mixing assembly comprises a first motor, a rotating rod is installed at the output end of the first motor, multiple fixing rods are fixedly connected to the outer side of the rotating rod, stirring rods are fixedly connected to the top ends of the multiple fixing rods, filtering barrels are installed on the outer sides of the multiple fixing rods and the stirring rods, stirring barrels are installed on the outer sides of the filtering barrels, and discharging grooves are formed in the bottoms of the stirring barrels; the right side of the shell communicates with a communicating pipe. Compared with the prior art, the mixing assembly is arranged, the multiple stirring rods are used for stirring in the filtering barrel, impurities are screened out through filtering holes of the filtering barrel, then the mixing barrel is used for driving the spiral blades to rotate, color master batches can be fully and evenly mixed, and the uniformity of pigment distribution in the color master batches is ensured; the color stability of the color master batch is improved, color fading and discoloration in the using process are effectively avoided, and the product quality is improved.

The invention relates to polyurea gloss oil for a high-performance ceramic tile and application of the polyurea gloss oil. The coating is prepared from polyaspartic acid ester resin, polyester resin, polyisocyanate, an ultraviolet light absorber and a flatting agent. According to the invention, polyaspartic acid ester resin is used as matrix resin, so that a coating film has good adhesive force with surfaces difficult to attach such as ceramic and glass, and the coating has a waterproof function due to good water resistance of polyurea; by adding the polyester resin, the toughness of the paint film is improved, and the problem that the paint film becomes brittle due to too low environment temperature is avoided; the paint film is cured by adding polyisocyanate; the weather resistance of a protected workpiece is improved by adding the ultraviolet absorbent, and the paint film has a mirror surface leveling effect by adding the leveling agent; the used resins belong to a high-solid low-viscosity type, so that the coating has ultralow VOC (volatile organic compound) environment-friendly characteristic, the two components can be directly constructed after being mixed, and the mixed solid content is greater than or equal to 95%.

The application provides a 5-aminoacetylpropionic acid-producing strain and a construction method and application thereof. The strain takes Escherichia coli as a chassis, up-regulates the expression amount of a key gene hemA of a 5-aminoacetylpropionic acid synthesis pathway, can improve the carbon flux for synthesizing 5-ALA, and simultaneously inhibits the core gene of a porphyrin precursor synthesis pathway, such as by modifying the RBS and the initiation codon of the hemE gene at the genome level and / or knocking out the hemN gene on the genome, so as to reduce the accumulation of porphyrin intermediates, to realize high-yield 5-ALA, and to effectively avoid the discoloration and deepening of the fermentation broth of the above strain, and to reduce the burden of downstream separation and purification. Further, the 5-aminoacetylpropionic acid dehydrase hemB is weakened, so as to reduce the path of 5-ALA into the porphyrin synthesis pathway, and to improve the 5-ALA yield. Thus, the purpose of improving 5-ALA and avoiding discoloration of the fermentation broth is achieved, and the production cost of 5-ALA is effectively reduced.

The present invention relates to a method for regenerating a joining structure using a frame, and more particularly, to a method for regenerating a joining structure using a frame, which, when processing a frame, such as a mask frame, which needs to be manufactured in accordance with a precise design in accordance with specifications, shapes, materials, and the like, supplements the thickness of a frame that is determined to be defective and discarded due to a loss in thickness. Therefore, the regeneration method of the joint structure of the utilization frame can effectively use waste cost and resources through reuse and reutilization.