207 results about "Ethyleneglycol bis" patented technology

The invention relates to a preparation method of a long-term stable amphiphilic antifouling coating based on mussel bionics. The method comprises the following steps: mixing dopamine hydrochloride, sodium borate, sodium carbonate and deionized water, dropwise adding a methacrylic anhydride solution, mixing the obtained dopamine methacrylamide with mercaptopolydimethylsiloxane, polyethylene glycoldiacrylate, a photoinitiator and a solvent, coating a base material with the mixture, and curing under ultraviolet irradiation. The method has the advantages of simple process synthesis conditions, cleanness, environmental protection, rapid ultraviolet-induced cross-linking reaction and good effect; the prepared coating has good mechanical properties and stability, has a very small swelling degreein a seawater environment, has an excellent anti-algae adhesion effect and has potential application in the aspect of marine antifouling materials.

The invention discloses a copper metal organic framework nanoparticle functionalized hydrogel, a preparation method and application thereof. The preparation method comprises the following steps: dissolving carboxymethyl chitosan, and adding reduced glutathione and N-hydroxysuccinimide which are mixed and dissolved in deionized water; adding 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride to prepare glutathione modified carboxymethyl chitosan; preparing copper metal organic framework nanoparticles; then mixing the copper metal organic framework nanoparticles with deionized water; and adding the glutathione modified carboxymethyl chitosan, acrylamide, polyethylene glycol diacrylate, polyethylene glycol diglycidyl ether and an initiator to prepare the copper metal organic framework functionalized hydrogel. According to the invention, the obtained hydrogel has the capabilities of slowly and controllably releasing copper ions, removing active oxygen of a wound surface, always keeping the wound surface free of hydrops and a wet 3D microenvironment, protecting the wound from external injury and promoting wound healing.

A process for the production of vinyl acetate is disclosed. The process comprises reacting ethylene, acetic acid, and oxygen in the presence of a catalyst to produce a reaction mixture comprising vinyl acetate, ethylene, carbon dioxide, acetic acid, water and ethylene glycol diacetate. The reaction mixture is separated to a gas stream comprising ethylene, and carbon dioxide and a crude vinyl acetate stream comprising vinyl acetate, acetic acid, water and ethylene glycol diacetate. An ethylene glycol diacetate stream is isolated from the crude vinyl acetate stream and subjected to a reactive distillation to recover acetic acid.

The invention belongs to the field of coating and particularly relates to UV (ultraviolet) fire retardant coating and a preparation method thereof. The UV fire retardant coating comprises the following raw materials in parts by weight: 30-40 parts of 1, 6-ethylene glycol diacrylate, 30-40 parts of flame retardant modified hyperbranched acrylic resin, 15-20 parts of polyesteracrylate, 0.5-2 parts of a photoinitiator, 1-3 parts of an adhesion promoter and 0.5-1 part of a flatting agent. The coating is excellent in flame retardant property and comparatively strong in weather resistance and belongs to environment-friendly coating.

The invention relates to cell freezing liquid not containing protein and serum and a preparation method thereof. The cell freezing liquid comprises polyvinyl alcohol, glucose, sodium chloride, sodium dihydrogen phosphate, disodium hydrogen phosphate, 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid, ethyleneglycol bis(2-aminoethylether)tetraacetic acid, dimethyl sulfoxide, and the balance of double distilled water. The cell freezing liquid has the advantages that the cell freezing liquid with single component and clear chemical components is established, the traditional serum is replaced, the possibility of pollution by viruses, bacteria, mycoplasma and the like is avoided, and the batch difference due to serum is reduced; a method of direct refrigerating in a -80 DEG C refrigerator is established, the freezing time is longer than or equal to 3 years, the procedure cooling step is not needed, and the freezing box is not used; compared with the traditional method, the operation is simple and convenient, and the safety is high; the survival rate and high activity of the frozen cells are guaranteed, the effect is better in comparison with the traditional serum, the serum is replaced, and the price is lower.

The invention discloses a mecobalamin tablet and a preparation method thereof. The mecobalamin tablet comprises a plain tablet and a film coating layer; the mass ratio of the plain tablet to the filmcoating layer is 100:510; the plain tablet comprises the following components in percentage by weight: 0.5% of mecobalamin, 40% to 70% of directly-compressed lactose, 15% to 45% of micro-crystalline fiber, 0 to 15% of corn starch, 0 to 15% of pregelatinized starch, 0 to 2% of stearic acid and 0 to 2% of a lubricant; the film coating layer comprises the following components in percentage by weight:20% to 40% of hydroxypropyl methyl cellulose, 20% to 50% of polyethylene glycol; 10% to 35% of titanium dioxide; 1% to 15% of yellow iron oxide; and 1% to 15% of red iron oxide. The preparation method of the mecobalamin tablet disclosed by the invention is simple; a mecobalamin raw material medicine can be uniformly dispersed in a manner of sieving and mixing the mecobalamin raw material medicineand proper auxiliary materials; the phenomenon of aggregation of the raw material medicine is prevented by a mechanical force, the raw material medicine is fully adsorbed on the auxiliary materials,and then the raw material medicine is mixed with other auxiliary materials step by step to improve the content uniformity; The preparation method disclosed by the invention reduces the stability riskby adopting a powder direct-compression process, and further improves the stability of the preparation by adopting a high-shading-performance film coating material for coating.

The invention discloses an efficient corrosion and scale inhibitor and belongs to the field of water treatment. The corrosion and scale inhibitor consists of polyaspartic acid, sodium silicate, phthalandione diethylene glycol acrylate, polydiallyl dimethyl ammonium chloride, hexamethylene tetramine, di(hydroxymethyl) imidazolidinyl urea, methylisothiazolinone, mycose, trihydroxymethyl aminomethane and water. The corrosion and scale inhibitor prepared by appropriate technological processes has the advantages of good corrosion inhibiting effect, storage resistance, safe and environment-friendly components, no pollution to the environment and the like, and has a very good application prospect.

The invention relates to the technical field of pesticide adjuvants, in particular to a flying prevention adjuvant and a preparation method and application thereof. The flying prevention adjuvant provided by the invention comprises the following components in parts by weight: 20-60 parts of polyethylene glycol, 5-20 parts of polyglycerol ester, 5-20 parts of wetting agent, 5-20 parts of styrene-acrylic emulsion, 10-20 parts of ethylene glycol diacetate, 10-20 parts of ethoxy modified polytrisiloxane and 20-60 parts of glycerol. According to the embodiment of the invention, the flying prevention adjuvant has better anti-drift performance, and the drift inhibition rate is more than 70%, so that different liquid medicines all have better anti-transpiration performance, the evaporation time ismore than 149s, and the anti-drift performance and the anti-volatility performance of the flying prevention adjuvant are improved compared with the flying prevention adjuvant added with vegetable oil.

The invention relates to a high-molecule slip casting plugging material. Particularly the material is suitable for being applied to water plugging and leakage prevention for fine cracks of buildings at the normal temperature. According to the material, a mixture of two or more of N,N'-dimethylacrylamide, N-methylol acrylamide, N,N'-methylene bisacrylamide, polyethylene glycol (200) diacrylate, poly ethyleneglycol (200) dimethacrylate, sodium hydrogen sulfite, sodium sulfite, sodium dithionite and sodium thiosulfate is used as a main raw material (a material A); a mixture of two or more of ammonium persulfate, potassium persulfate, trismetyl aminomethane and ethylenediamine tetraacetic acid disodium salt is used as a curing agent (a material B); after the material A and the material B are mixed, the slurry viscosity is extremely low, the groutability is excellent, the gelation time can be adjusted according to the demand, the high-molecule gel formed through curing has good adhesivity and compression strength and has a leakage prevention and plugging function, and the material has wide application prospects in the field of leakage prevention and plugging of the buildings.

The invention discloses a preservation method of a hilsa herring sperm. The preservation method comprises mixing an antifreeze agent, the hilsa herring sperm and a diluent at the volume ratio of 1:1:5, and preserving at the temperature of 5 DEG C, wherein the diluent comprises the ingredients in percent by volume: 50% of sodium chloride injection, 15-20% of pure water, 7-14% of potassium chloride,5-10% of calcium chloride, 5-10% of sodium bicarbonate, 1-2% of chlorogenic acid, 1-3% of glycerinum, 3-5% of glucose, 8-15% of lecithin, 1-3% of sodium citrate, 1-2% of streptomycin, 1-3% of poly-sodium glutamate, 1-3% of bifidobacterium, and the balance of lactic acid bacteria by volume; and the antifreeze agent comprises the ingredients in percent by volume: 30% of dimethyl sulfoxide, 20% of glycerinum, 30% of ethylene glycol, and 20% of dimethylacetamide. The preservation method effectively inhibits the growth and propagation of harmful microbes, reduces the metabolic rate of the sperm, effectively keeps the preservation quality of the hilsa herring sperm, and saves the production cost, and operation steps are convenient.

The invention relates to the technical field of monocrystalline silicon wafer texturing agents. The invention discloses a texturing additive for monocrystalline silicon surface treatment. The texturing additive is prepared from the following components in percentage by weight: 0.01 to 1.0 percent of sodium lignin sulfonate, 0.0001 to 0.01 percent of sodium polynaphthaldehyde sulfonate, 0.2 to 4 percent of polyethylene glycol, 1.5 to 5 percent of diethylene glycol butyl ether, 1.5 to 2.5 percent of potassium perfluorohexylsulfonate, 0.1 to 5 percent of sodium diethylcaprylate and 82 to 96 percent of water. The invention further discloses a texturing agent for monocrystalline silicon surface treatment, the texturing additive is added into a 1%-2% sodium hydroxide or potassium hydroxide solution, the mixture is mixed to be uniform at the temperature of 20-80 DEG C, and the mass ratio of the texturing additive to the alkaline solution is (1-5): 100. The invention also discloses the monocrystalline silicon surface texturing method. The method comprises the following steps: a monocrystalline silicon wafer is pretreated; and the pretreated monocrystalline silicon wafer is immersed in thetexturing agent for texturing, the texturing temperature is 70-90 DEG C, and the texturing time is 300-1200 s. The monocrystalline silicon surface treated by the texturing additive and the texturing agent achieves a good texturing effect, the textured surface size is controllable, the texturing rate is high, the reflectivity is low, one side is clean, and the service life of the texturing agent islong.

The invention provides a purification device and method for high-purity ethylene carbonate, and relates to the field of purification devices. The purification device for the high-purity ethylene carbonate comprises a purifying agent storage tank, a dissolving kettle, a purification crystallization kettle, a purification filter, a purification dryer, a purified dry gas condenser, a filtrate treatment tower, a filtrate treatment tower overhead condenser, a filtrate treatment tower condensate tank, a filtrate treatment tower kettle reboiler, a recovery crystallization kettle, a recovery filter and a purifying agent cooler. By utilizing the characteristics that the solubility of ethylene carbonate in a purifying agent is reduced along with the reduction of the temperature, and substances such as ethylene glycol and diethylene glycol can be mixed and dissolved with the purifying agent in any ratio, the substances such as the ethylene glycol and the diethylene glycol are dissolved in the purifying agent by adopting a dissolving and cooling crystallization method, and the ethylene carbonate is crystallized and separated out, so that the high-purity ethylene carbonate can be obtained; and as long as the purity of the raw material ethylene carbonate is greater than or equal to 85wt%, the high-purity ethylene carbonate product with the purity greater than or equal to 99.97 wt% can be obtained.