34results about How to "Storage stable" patented technology

The invention relates to a paint technology, an environment-friendly technology and an antibacterial mould-proof technology, in particular to high-efficiency environment-friendly antibacterial mould-proof inorganic composite nano paint and a preparation method thereof. The high-efficiency environment-friendly antibacterial mould-proof inorganic composite nano paint comprises the following components in percentage by weight: 0.5 to 5 percent of wetting dispersant, 0.01 to 20 percent of inorganic composite nano antibacterial agent concentrated pulp, 0.5 to 10 percent of hydrophobing agent, 0.5 to 10 percent of anionic powder, 0.5 to 8 percent of film-forming aid, 0.1 to 2 percent of anti-settling agent, 0.8 to 10 percent of antifreezing agent, 0.1 to 3 percent of defoaming agent, 4 to 30 percent of pigment, 0 to 30 percent of filler, 15 to 45 percent of emulsion, 0.1 to 4 percent of thickening agent, 0.1 to 3 percent of flatting agent, 0 to 3 percent of pH regulator and 0.5 to 45 percent of water. The high-efficiency environment-friendly antibacterial mould-proof inorganic composite nano paint is mainly prepared by adding the inorganic composite nano antibacterial agent into the basic materials, so that the paint has the coating characteristic of high performance, is low is cost, and has a function of purifying air, can eliminate harmful gas volatile organic compounds (VOC), formaldehyde and the like and also has a durable and high-efficiency antibacterial mould-proof function, so that the sterilizing rate within 6 hours reaches 100 percent and the mould-proof grade reaches the first grade. By the high-efficiency environment-friendly antibacterial mould-proof inorganic composite nano paint and the preparation method thereof, self-cleaning performance, hydrophobicity, scrubbing resistance, dirt resistance and weather resistance of the coating are improved; and the high-efficiency and durable antibacterial and mould-proof effect is achieved.

The invention relates to a water-based extinguishing agent with solidification and foaming characteristics and a preparation method of the water-based extinguishing agent. The water-based extinguishing agent with the solidification and foaming characteristics comprises the following substances by mass: 5-40 parts of organic or inorganic burning-resistant material which can be solidified and foamed after being heated, 0.1-2 parts of surfactant, 0.1-1 parts of water-soluble thickener, and 57-94 parts of water. The preparation method of the water-based extinguishing agent comprises the following steps: levigating the organic or inorganic burning-resistant material which can be solidified and foamed after being heated in a pulverizer to be 1250 meshes above, sufficiently dispersing, wetting and mixing the powder with the surfactant in a high-speed dispersing homogenizer, and then uniformly mixing with a water solution of the water-soluble thickener in a mixing tank. The water-based extinguishing agent can be uniformly dispersed in water and stably stored, quickly laid on the oil surface, stably suspended, and foamed to be films after being heated and accumulatively cover the surface. The water-based extinguishing agent has the advantage of special long anti-burning time, so that the water-based extinguishing agent is especially suitable for extinguishment and rescue for ultra-large type oil tanks.

The invention relates to dry powder paint for construction, which is prepared from polymer latex powder, titanium pigment, calcium carbonate, calcined kaolin, talcum powder, cellulose ether, a solid defoaming agent, a solid dispersing agent, a solid thixotropic agent and coloring pigment. The preparation method of the dry powder paint comprises the following steps: putting the components of the dry powder paint into a dry powder mixer for mixing for 20-40min, and then, removing bigger particles by using a vibratory screen with 120 meshes. The use method of the dry powder paint comprises the following steps: carrying out surface pretreatment on a wall body; pouring the dry powder paint into clear water and stirring and mixing evenly, standing, and then stirring again; and applying the obtained liquid paint by adopting a roller painting, spray painting or brush painting mode. The formed paint film has the characteristics of good water resistance, alkali resistance, weather resistance, washing resistance, dirt resistance and the like, has the performances of the traditional latex paint and does not contain components of VOC (zero VOC), heavy metals and the like harmful to the environment and the human health.

A nano-class composite polyurethane paint for airplane is composed of the modified synthetic resin and the solidifying agent. Said modified synthetic resin is prepared through sequentially adding nano slurry, solvent, assistant and pigment to synthetic resin, grinding and filtering. It is applied through mixing said modified synthetic resin with said solidifying agent to obtain paint, spraying antirust paint, and spraying said paint. Its advantage is high weatherability.

A heat-stored stabilized rubber powder-asphalt composition and its production are disclosed. The composition consists of asphalt 65-95wt%, 1-30wt% rubber powder 1-30wt%, compatibilizer 0-30wt% and auxiliary 0.01-5wt%. The process is carried out by mixing asphalt with rubber powder and compatibilizer, reacting at 100-240degree under high-speed shear agitating or gel grinding action for 0.2-4hrs, adding into auxiliary and re-reacting for 0.3-6hrs.

The invention discloses a preparation method of a styrenated hindered phenol or styrenated phenol antioxidant product, belonging to the field of preparation process methods of polymer antioxidant products. The preparation method is characterized in that: o-tert-butyl phenol or phenol, p-cresol, o-cresol and m-cresol are used as raw materials, styrene is used as an alkylation reagent, an organic acid compound is used as a catalyst, a small amount of polymerization inhibitor is added, and the styrenated hindered phenol product or styrenated phenol product is prepared through catalytic alkylation reaction; a neutralizing and decolorizing agent is added to the styrenated product to deactivate the acidic catalyst and remove the coloring source material, thus obtaining a white-like or light yellow viscous liquid namely the styrenated phenol antioxidant product which has clear and transparent appearance, pH value of 6.5-7.5, storage stability and high use efficiency; and the styrenated phenol antioxidant product is free of water-soluble pollutants such as free phenol or methyl phenol, thereby solving the problem of environmental pollution caused by the use of the product in styrene butadiene rubber latex.

The invention relates to a high-decoration alcohol acid-organosilicon crylic acid composite waterborne resin, which comprises the following raw materials: the alcohol acid, a monomer mixture, an assistant emulsifying agent, an emulsifying agent, an initiator and deionized water. In the total mass of the solid components of the composite waterborne resin, the mass fraction of the alcohol acid is 10 to 30 percent and the mass fraction of the monomer mixture is 70 to 90 percent; in the total mass of the monomer mixture, the mass fraction of a soft alkyl acrylate monomer is 20 to 80 percent, the mass fraction of a hard alkyl acrylate monomer is 20 to 70 percent, the mass fraction of a functional monomer is 5 to 10 percent and the mass fraction of an ethyl organosilicon monomer is 1 to 10 percent; the mass percentage of the using amount of the assistant emulsifying agent, the emulsifying agent and the initiator to the total mass of the monomer mixture is 0.2 to 1 percent, 1 to 3 percent and 1 to 3 percent respectively; and the alcohol acid and all the monomers are emulsified in the deionized water simultaneously under the action of the assistant emulsifying agent and the emulsifying agent to form miniemulsion with droplet diameter of between 50 and 80nm. The resin has the advantages of the alcohol acid and the crylic acid simultaneously.

The invention discloses high cleanness methanol diesel and a preparation method thereof. The high cleanness methanol diesel consists of the following components in percentage by weight: 20 to 80 percent of national standard diesel, 10 to 45 percent of methanol, 10 to 35 percent of cosolvent, 2 to 10 percent of methyl tertiary butyl ether, and 0.01 to 2.5 percent of ethyl nitrate, wherein the cosolvent comprises the following components in percentage by weight: 10 to 40 percent of vegetable oil acid, 10 to 25 percent of fatty acid methyl ester, 5 to 10 percent of diethyl formal, 1 to 10 percent of cyclohexane and 10 to 50 percent of aviation kerosene. The preparation method comprises the following steps of: adding the raw materials into a reaction kettle in a certain ratio, and performing reaction; and after the reaction, treating by using a nano emulsifier and a high energy static mixer to obtain the product, wherein the product has the particle diameter of 0.5 to 10nm. The invention has the advantages of high technical content and simple process; and the product has stable performance, the quality meets No.0, No.-10 and No.-20 diesel oil standards in GB252-2000, and the diesel can serve as oil for motor vehicles to be widely promoted.

The invention discloses nano marine corrosion resisting priming paint. The nano marine corrosion resisting priming paint is characterized by being prepared from, by weight, 20-30 parts of linear nhenolic epoxy resin, 2-4 parts of tristearin, 5-7 parts of phenolic aldehyde amine curing agent, 4-6 parts of polyamide curing agent, 2-4 parts of titanium dioxide, 8-12 parts of nickel alloy powder, 3-5 parts of nano biological antifouling agent, 1-3 parts of zinc oxide, 15-18 parts of acetone, 12-14 parts of filler and 2-5 parts of acetic acid. The priming paint has constructability and storage stability and is cured fast, and a film layer is even; as nickel alloy powder is added, the marine corrosion problem of engineering parts is solved, and the priming paint has good corrosion resistance, abrasion resistance, water resistance and chemical resistance; nano capsaicine and P-cinnamic sulphate in the nano biological antifouling agent have a high adhesion inhibiting effect on marine bacteria and barnacles, nano homarine can prevent adhesion of marine benthic diatom and barnacles and has an avoiding effect on marine organisms, adhesion capacity of marine organisms is destroyed to prevent and control pollution, and the environmental protection property is high.

The invention provides low-conductivity super-long-acting organic base type anti-freezing cooling liquid, which comprises the following components in percentage by weight: 15 to 96 percent of anti-freezing agent, 0.05 to 1.5 percent of natural alkaloid, 0.5 to 2.5 percent of hetero-cycloalkane, 0.01 to 0.3 percent of azole component, and the balance of deionized water. In invention, since the natural alkaloid is matched with nonionic organic compounds, the prepared anti-freezing cooling liquid has the characteristics of low freezing point, high boiling point, no scale formation, corrosion protection, high heat efficiency and the like; in addition, the prepared anti-freezing cooling liquid also has ultra-low conductivity which can reach 5 mus / cm and is a few hundredths of the conductivity of a common water cooling medium because the anti-freezing cooling liquid does not contain the components of inorganic salts, organic carboxylic acid and the like. The anti-freezing cooling liquid with ultra-low conductivity can effectively slow up the corrosion on metal parts of a cooling system, and meet the requirement of special conditions such as the cooling of a wind generator set and the like on the insulation safety of the anti-freezing cooling liquid. The anti-freezing cooling liquid realizes environmental protection and ultra-long-acting service, and is particularly suitable for special equipment such as a wind generator set, an imperial sedan engine and the like.

The invention relates to a titanium nanometer polymer alloy coating material and an application method thereof. The titanium nanometer polymer alloy coating material comprises a primer which is composed of nanometer organic titanium imide copolymer resin, epoxy resin, methylated amino resin, bismaleimide resin powder, liquid acrylonitrile butadiene rubber, active zinc oxide, a coating auxiliary, N-methylpyrrolidinone, dimethylformamide, methyl isobutyl ketone and superfine zinc powder, and a finish which is composed of nanometer organic titanium imide copolymer resin, epoxy resin, methylated amino resin, bismaleimide resin powder, liquid acrylonitrile butadiene rubber, alpha-phase nanometer aluminum oxide, pigment carbon black, coating auxiliary, N-methylpyrrolidinone, dimethylformamide and methyl isobutyl ketone. The titanium nanometer polymer alloy coating material is more excellent in properties than imported products used at present, the protective service life of the material is prolonged by 2-3 times, and therefore, the maintenance cost of equipment and the cost of oil and gas exploitation are greatly reduced, and the titanium nanometer polymer alloy coating material satisfies customers.

The invention discloses a method for preparing inorganic / organic composite porous lithium battery diaphragms by using inorganic particles with high dispersion speed, excellent effect, uniform aperture and high porosity. The method comprises the following steps of: adding the inorganic particles with particle diameter of 0.001 to 10 mu m into an adhesive polymer solution, wherein the content of the inorganic particles is 60 to 95 weight percent based on the weight of the adhesive polymer solution; using ultrasonic wave with frequency of 20-130 KHz and power of 100-1,500 W to act on the adhesive polymer solution added with the inorganic particles so as to uniformly disperse the inorganic particles; and coating the adhesive polymer solution dispersed with the inorganic particles on a porous polymer base material, and drying to obtain the inorganic / organic composite porous lithium battery diaphragms.

The invention discloses a preparation method of a silicone rubber sponge, and belongs to the field of silicone rubber sponges. The preparation method includes the steps that alkali is added in rosin and pig's hooves to obtain a saponified mixed solution, the saponified mixed solution is then mixed with a bone glue solution to obtain a rosin albumin glue foaming solution, raw organic silicon rubber, white carbon black and nano-silica are subjected to mixing, then placed in a press vulcanizer for radiation crosslinking vulcanization and then transferred into a double-roll open mill, the rosin albumin glue foaming solution and hydrogen-containing silicone oil are added for foaming to obtain a silicone rubber sponge rubber material, and finally extrusion and granulation are carried out to obtain the silicone rubber sponge. The biological foaming agent prepared through the method is free of undesirable odors, toxins and pollution, emits little heat when decomposed and has storage stability; through radiation crosslinking vulcanization, the silicone rubber material has a proper crosslinking degree, and cells of the prepared silicone rubber sponge are small and uniform; by adding white carbon black, the cell diameter of silicone rubber can be reduced, the tensile strength can be improved, and the compression set can be reduced.

The invention discloses a method for preparing silver-loaded nanometer titanium dioxide antibiosis UV curable varnish, and the method comprises the following steps: adding silver-loaded nanometer titanium dioxide powder which accounts for 3 - 5% of UV curable varnish into 1 / 10 UV curable varnish, performing an ultrasonic dispersion for 30 - 40 minutes, then adding a composite dispersant and 9 / 10 UV curable varnish into a pre-dispersed nanometer modified paint, wherein an addition of the composite dispersant accounts for 0.25 - 0.35 % of UV curable varnish system, performing a high speed mechanical dispersion for 50 - 80 minutes, wherein the rotating speed is 35000 - 4500 r / minutes. According to the antibiosis paint provided in the invention, the antibacterial agent has the advantages of uniform dispersion, stable storage without changing the original physicochemical performance of the paint, strong antibacterial capability, strong capability of photocatalytic degradation of organic matter and simple preparation method, and is used for the fields of antibacterial household electrical appliances, antibacterial plastics, antibacterial commodities and the like, and is suitable for the plastic products of PP, PS, HDPE, LDPE, PVC, PC, ABS and the like.

The invention belongs to the field of analysis technical methods, and relates to a preparation method of a gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation. The preparation method comprises the following steps that chloroauric acid is taken as a gold source, silver nitrate is taken as a silver source, and methionine is taken as a reducing agent and a stabilizing agent, and the water-soluble gold-silver bimetal nanocluster is prepared on the basis of a principle method of reducing Au<+>and Ag<+> on line by methionine. According to the preparation method, required raw materials are easily available and have good water solubility, a synthesis device is simple, the conditions are mild, and the operation is safe. The obtained gold-silverbimetal cluster is good in stability and can generate near-infrared electrochemical luminescence with the maximum radiation wavelength greater than 850 nanometers.

The invention relates to cefixime liposome and preparation method therefore as well as dry suspension containing the cefixime liposome. The dry suspension is composed of the cefixime liposome and pharmaceutically acceptable carriers, wherein the cefixime liposome comprises the following components in parts by weight: 1 part of cefixime, 1.25-5 parts of hydrogenated soybean lecithin, 1.25-5 parts of hydrogenated yolk lecithin, 2.5-10 parts of cholesterol and 0.1-5 parts of polysorbate 80. The dry suspension not only accords with the requirements of Chinese pharmacopoeia, but also has the advantages of better storage stability in normal temperature, faster effect exertion and obviously improved bioavailability in comparison with the common cefixime medicaments.

The invention relates to a stabilized and gelatinized zinc methacrylate or zinc acrylate. The formula comprises the following materials in parts by weight: 70-80 parts of zinc methacrylate (ZDMA) or zinc acrylate (ZDA), 10-19 parts of basic gel (at least one of ethylene-propylene methylene copolymer and polyethylene-vinyl acetate rubber), 1-3 parts of internal releasing agent, 1-5 parts of hydroquinone or aminophenol crosslinking inhibitor and 0.01-13 parts of plasticizer; the internal releasing agent is selected from fatty acid salt, aliphatic ester, fatty acyl amide or mixture thereof; the plasticizer is selected from polyester plasticizer or high-viscosity paroline and low-melting-point polyethylene wax.

The invention relates to the field of high-temperature glass ink, particularly to water-based lead-free environment-friendly high-temperature glass ink with high covering power, low light transmittance, high acid resistance, high alkali resistance, excellent thixotropy, good storage stability and excellent constructability, and a preparation method thereof, wherein the water-based lead-free environment-friendly high-temperature glass ink comprises the following raw materials in parts by weight: 48-70 parts of lead-free environment-friendly glass powder, 5-30 parts of a water-based binder, 15-40 parts of an inorganic pigment and 0.2-2 parts of a rheological aid, and 5-12% of a water-based diluent needs to be added in a matched manner during construction. The water-based lead-free environment-friendly high-temperature glass ink disclosed by the invention does not contain volatile toxic gas, is low in VOC and environment-friendly, does not influence the health of construction personnel, is free of harmful substances such as lead, cadmium, mercury, hexavalent chromium, PBB, PBDE and the like, high in transfer capacity, high in adhesive force and good in shading performance and has excellent wettability and compatibility to glass matrixes. The preparation method disclosed by the invention is high in production efficiency, stable in production quality among batches and suitable for large-scale production.

The invention relates to a diluting agent for transferring printing paste. The diluting agent comprises the following ingredients in mass percentages: 3 to 6 percent of PVB (polyvinyl butyral) and 94 to 97 percent of auxiliaries, wherein the auxiliaries are mixtures of methanol and isobutanol. When the environment temperature is lower than 10 DEG C, the volume ratio of the methanol to the isobutanol is 3:(1-1.5). When the environment temperature is 10 to 30 DEG C, the volume ratio of the methanol to the isobutanol is 1:(1-1.5). When the environment temperature is higher than 30 DEG C, the volume ratio of the methanol to the isobutanol is (1-1.5):3. The diluting agent has the following advantages that (1) PVB with different performances is selected for combination so that the paste meets a certain depth requirement, and the transfer printing color difference is controlled; and (2) the proper auxiliaries (the methanol and the isobutanol) are added into the diluting agent, so the storage of the used rest paste is more stable, and the production cost is saved.

The invention relates to the technical field of liquid polishing wax, in particular to aluminum alloy liquid fine polishing wax and a preparation method thereof, and the aluminum alloy liquid fine polishing wax comprises the following components: mineral oil, fatty acid, grease, an emulsifier, a surfactant, an alkaline brightener and an abrasive. The aluminum alloy liquid fine polishing wax is high in polishing efficiency and good in surface effect. The preparation method of the aluminum alloy liquid fine polishing wax comprises the following steps that under the stirring condition, water, the alkaline brightener, the surfactant, the emulsifier and the abrasive are stirred to be completely dissolved, and a uniform mixed solution is obtained; and when the temperature of the mixed solution reaches 75 DEG C or above, adding mineral oil, grease and fatty acid, stirring to obtain an emulsion, continuously stirring for continuous emulsification, and stopping stirring and heating to obtain the aluminum alloy liquid fine polishing wax. The preparation method of the aluminum alloy liquid fine polishing wax is low in process equipment investment, simple and convenient in process operation, and capable of producing the high-quality and high-stability aluminum alloy liquid fine polishing wax.

The invention relates to an ultra-low power consumption memory device based on a molecular spin state. The memory device comprises a matrix, a data storage medium and a probe. The substrate is an electrically conductive substrate; the data storage medium is a spin-state variable organic molecular layer, and the molecules in the spin-state variable molecular layer are regularly arranged on the surface of the conductive substrate. The probe is used for writing data to and / or reading data stored in a data storage medium. The writing operation includes changing the spin state of the molecule in the spin state variable molecular layer, and the reading operation includes detecting the spin state of the molecule in the spin state variable molecular layer. The spin state variable organic moleculeis a phthalocyanine iron chloride molecule. The invention realizes ultra-low power consumption of the device by using ferric phthalocyanine molecules which are easy to realize different spin state conversion as a storage medium and using lateral manipulation technology under the condition of low voltage and low current to easily control the conversion of different spin states.

The invention provides an intelligent deduster, which comprises a dust collection box. A right side wall of the dust collection box is provided with a blown dust inlet, a left side wall of the dust collection box is provided with a blown dust outlet, the top of the dust collection box is provided with a spray nozzle, in the dust collection box, a left plate and a right plate form a ''V'' shaped dust storage device, a plurality of staggered second baffle plates and first baffle plates are disposed from right to left in the dust collection box, the first baffle plates and the second baffle plates enable roundabout communication inside the dust collection box, the bottom of the ''V'' shaped dust storage device is provided with a dust outlet, the dust outlet is internally provided with a switch valve, and the bottom wall of the dust collection box is hinged to the dust collection box. The intelligent deduster provided by the invention can collect dust thoroughly, and the disposed spray nozzle can increase the humidity in the dust collection box, thus avoiding re-discharge of dust out of the dust collection box along with airflow because of excess dryness. The ''V'' shaped dust storage device disposed in the dust collection box enables more stable storage of dust in the dust collection box. The connection way between the bottom wall of the dust collection box and the dust collection box facilitates timely removal of collected and precipitated dust in the dust collection box.

The invention discloses a number 10 proportional bio-diesel, which comprises the following substances in percentage by weight: 45 to 60 mineral diesel, 20 to30 plant oil, 10 to 15 methanol, 1.0 to 3.0 naphthenic acid, 1.0 to 3.0 OP emulsifier, 0.8 to 2.0 sodium dodecyl sulfate, 0.5 to 2.0 triethanolamine and 0.01 to 0.03 bio-enzyme. The preparation method comprises the following steps that: the plant oil is uniformly mixed with the methanol, the OP emulsifier, the sodium dodecyl sulfate and the triethanolamine according to the above mass percent, naphthenic acid and bio-enzyme are added to beadequately mixed, and the mixed solution is slowly poured into the mineral diesel under the mixing condition to obtain the number 10 proportional bio-diesel. The proportional bio-diesel has advanced process, environmental protection and stable product performance, is free from liquating grease and methanol after being stored for more than half year at the temperature of minus 10 DEG C, is transparent and stable, and can reach the standard of the number 10 bio-diesel in GB / T20828 - 200 standard. The proportional bio-diesel is proved in the industrial boiler and diesel engine rack test that: the diesel is stable to store and to burn, has high heat value, and is normal to be atomized by oil path and nozzle. The engine is stable to run.

The invention provides a waterproof coating for an internal wall and a preparation method of the waterproof coating. The coating consists of the following components in parts by mass: 36-48 parts of water, 0.7-2.5 parts of sodium hexametaphosphate, 24-35 parts of argil, 18-26 parts of calcined kaoline, 0.9-1.8 parts of polyoxyethylene ether, 48-62 parts of styrene-acrylic emulsion, 20-30 parts of silica sol, 2.7-5.4 parts of texanol ester alcohol, 1-2.4 parts of polycarbonate, 0.5-1.2 parts of diethyl phthalate, 0.1-0.3 part of rigid polyvinyl chloride and 1.2-3 parts of sodium pentachlorophenate. The coating provided by the invention is attractive in appearance, stable in storage and proper in viscosity, has good heat resisting, freezing resisting and waterproofing functions, has excellent mildewproof and antistatic effects, and can achieve an extremely good protection effect on the internal wall.

According to the technical scheme, the invention provides a boletus aereus mother strain preservation method, a preservation culture medium and a preparation method thereof, and the preservation culture medium comprises 50-200 g of coarse sawdust, 100-400 g of fine sawdust, 25-125 g of coffee shells, 25-150 g of turfy soil, 1-5 g of monopotassium phosphate, 0.5-3 g of magnesium phosphate and 300-700 ml of water. The preservation culture medium and the preparation method thereof are low in cost and simple to operate, and the preservation method of the boletus aereus mother strain by using the preservation culture medium is long-term, stable, simple and convenient.

The invention relates to the field of antimicrobial agents, and more particularly provides an antimicrobial agent for textile and a preparation method of the antimicrobial agent. Preparation materialsof the antimicrobial agent for textile provided by the invention at least comprises plant components, composite crystals of zinc phosphate and silver phosphate, and organic silicone; the plant component comprises a component A and a component B; the component A comprises the following constituents in parts by weight: 1-9 parts of mint extracts, 1-9 parts of green tea extracts; and the component Bcomprises 8-20 parts of aloe and 8-20 parts of radix paeoniae alba.

The invention provides an ultraviolet-resistant fluorescent whitening agent emulsion, which is composed of the following components: 15-30 parts of fluorescent whitening agent, 20-40 parts of water, 8-12 parts of emulsifier, 5-8 parts of ultraviolet light absorbing agent and 60-80 parts of petroleum ether, the structural formula of the fluorescent whitening agent is as shown in formula (I), and the emulsifier is composed of polyethylene glycol and sodium dodecylsulfonate with a mass ratio of 1:1-3 composition, the molecular weight of the polyethylene glycol is 400-600, and the ultraviolet absorber is 2-hydroxy-4-acrylate benzophenone or 2-methyldibenzoylmethane. The antistatic fluorescent whitening agent emulsion provided by the present invention has the advantages of stable storage and uniform dispersion, can be directly applied to the surface of the product by spraying, is convenient to use, and effectively avoids the decomposition and failure of the whitening agent due to post-processing of the product. At the same time, it can improve the anti-ultraviolet effect of polymer materials.

The invention relates to the field of biomimetic materials, and discloses a method for improving efficiency of waterborne polyurethane in synthetic leather production. No solvent is added in a used waterborne polyurethane dispersion solution, the molecular weight of a prepolymer is increased by increasing of the molar ratio of reaction groups, the waterborne polyurethane dispersion solution has the advantages of good dispersion and stable storage, bonding effects exist between added sol particles and the waterborne polyurethane, through adsorption and permeation effects, the chemical bonding degree of the added sol particles and the waterborne polyurethane is increased sharply, the surface tension of the waterborne polyurethane emulsion is decreased, the stability of the emulsion is increased, the surface energy is decreased, the wetting leveling property is changed to an excellent state, the viscosity is increased to 100-105 (mPa. s), no additional thickener is added, the evaporationenergy is reduced, and the film-forming time is greatly reduced. The production cost of waterborne polyurethane synthetic leather is reduced by compounding, and properties are optimized.

The invention provides yeast preserving solution and also provides a method for preserving yeasts by using the yeast preserving solution and a fermentation composition containing the yeasts and the yeast preserving solution. The yeast preserving solution contains buffer solution serving as a solvent and mycose and adenine which are dissolved in the solvent and can preserve a bacterial strain for 1 to 2 years under a condition of 4 to 10 DEG C or for 1 to 3 weeks at normal temperature. The fermentation composition can be used as a seed to be directly inoculated in a K tank for production without resurrection propagation in a liquid culture medium in a triangular flask, thereby reducing half of the time of a seed production period of a production line.