29 results about "Sodium bisulphite" patented technology

The invention discloses zwitterionic concrete internal curing hydrogel based on humidity-pH dual responsiveness and a preparation method of the zwitterionic concrete internal curing hydrogel, and belongs to the technical field of building materials. The water-based cleaning agent is prepared from the following raw material components in percentage by weight: 6%-8% of N-vinyl imidazole, 8%-12% of 2-methylimidazole, 6%-8% of 2-acrylamido-2-methylpropanesulfonic acid, 2%-4% of sodium p-styrenesulfonate, 26%-30% of acrylic acid, 18%-21% of N-vinyl pyrrolidone, 15%-18% of glycidyl methacrylate, 2%-5% of nano montmorillonite powder, 0.05%-0.1% of divinyl benzene, 0.05%-0.15% of N, N-dimethylformamide and the balance of water. The invention discloses an anti-freezing agent which is prepared from the following components in percentage by weight: 0.1%-0.3% of N, N-methylene bisacrylamide, 0.1%-0.3% of 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propane-1-ketone, 0.5%-0.8% of ammonium persulfate and 0.5%-0.8% of sodium hydrogen sulfite. Double response to the internal humidity and pH value of the concrete can be achieved, and the requirement for precise internal curing of modern high-performance concrete is met.

The invention belongs to the technical field of polyacrylamide synthesis, and particularly relates to a synthesis method of polyacrylamide for oil displacement. The synthesis method of the polyacrylamide for oil displacement, disclosed by the invention, comprises the following steps: (1) pre-emulsifying 1H, 1H, 2H, 2H-perfluorooctyl acrylate; (2) preparing a water phase; (3) preparing an organic phase solution; (4) polymerization reaction; and (5) post-treatment. According to the synthesis method of polyacrylamide for oil displacement, acrylamide is used as a main monomer, 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt, 1H, 1H, 2H, 2H-octyl perfluoroacrylate and 1-methacryloyloxy adamantane are used as functional monomers, a potassium persulfate solution-sodium hydrogen sulfite solution is used as an initiator system, and the polyacrylamide for oil displacement is synthesized through a one-step method. The polyacrylamide for oil displacement, which is prepared by adopting a water-phase micelle polymerization method, has temperature resistance, salt resistance and shear resistance.

The application relates to a compound medicine for delaying skeletal muscle aging and application thereof, and the medicinal active components in the compound medicine composition are composed of menadione bisulfite sodium and N-acetyl cysteine, and belong to the technical field of biological medicine. A novel drug combination mode is developed, an oxidant menadione bisulfite sodium (MBS) and an antioxidant N-acetyl-L-cysteine (NAC) are combined and given in different time periods to regulate the H2O2 circadian rhythm of the skeletal muscle of old mice, the changes of the muscle strength, histopathology and aging marker protein level of the skeletal muscle of the old mice are detected, and then the precise compound medicine capable of improving the skeletal muscle function of the old mice and delaying skeletal muscle aging is determined. The application provides an effective drug combination strategy for relieving or treating the delay of skeletal muscle aging, and has very significant meaning.

The application belongs to the technical field of preparation of thermochromic hydrogel, and discloses a thermochromic hydrogel for shielding ultraviolet and near-infrared light and a preparation method and application thereof. The thermochromic hydrogel is prepared by one-pot low-temperature crosslinking with N-isopropyl acrylamide as a temperature-sensitive matrix, hydroxypropyl methyl cellulose as a modified component, titanium dioxide and cesium tungsten bronze as functional fillers, N, N-methylene bisacrylamide as a crosslinking agent, ammonium persulfate and sodium bisulfite as an initiation system. The thermochromic hydrogel realizes full-band regulation of sunlight by using the ultraviolet shielding of titanium dioxide and the near-infrared heat insulation performance of cesium tungsten bronze. The prepared hydrogel has the characteristics of high visible light transmittance, excellent solar light modulation efficiency and suitable critical transition temperature, and makes up for the defect of insufficient spectral shielding capacity of traditional single PNIPAM hydrogel. The process is mild and simple, the raw materials are cheap and easy to obtain, and the hydrogel is easy to form a film in a large area and to be prepared on a large scale, so the hydrogel can be widely applied to the fields of energy-saving and light-regulating such as intelligent windows of buildings, vehicle-mounted light-regulating glass and the like.

The invention belongs to the technical field of styrene-butadiene latex preparation, and discloses carboxylic styrene-butadiene latex for food paperboard coating and a preparation method of the carboxylic styrene-butadiene latex. The carboxylic butadiene-styrene latex is prepared from the following raw materials in parts by weight: 30 to 45 parts of butadiene, 25 to 40 parts of styrene, 3 to 8 parts of methacrylic acid, 2 to 4 parts of polar crosslinking monomer, 1.5 to 3 parts of alkyl glycoside emulsifier, 0.3 to 0.8 part of ammonium persulfate, 0.1 to 0.4 part of sodium hydrogen sulfite, 0.2 to 0.6 part of chain transfer agent and 80 to 100 parts of deionized water. The alkyl glycoside emulsifier adapts to a mixed monomer system, stabilizes the pre-emulsion and the polymerization process, ensures that the pre-emulsion is not layered in the storage and dropwise adding process, improves the polymerization uniformity of the monomer in the micelle, and further improves the smoothness and glossiness of the coated paper. The raw materials do not contain formaldehyde and nonyl phenol, the VOC content is extremely low, the food contact safety standard is met, meanwhile, the ageing-resistant defect of traditional carboxylic butadiene-styrene latex is overcome, the food packaging and storage period is prolonged, and the environment-friendly carboxylic butadiene-styrene latex can be suitable for various food packaging scenes.

The invention provides a synthesis method of an acrylamide-hydroxyethyl methylacrylate binary polymer and application of the acrylamide-hydroxyethyl methylacrylate binary polymer in pyrite beneficiation. The method comprises the following steps: water-phase free radical copolymerization: dissolving acrylamide in deionized water, dropwise adding hydroxyethyl methylacrylate under the protection of an inert atmosphere, heating to 55-65 DEG C, then adding an ammonium persulfate-sodium hydrogen sulfite initiator into a mixed system in batches, carrying out a heat preservation reaction at 55-65 DEG C for 4-6 hours, adjusting the pH value of a product to 6.5-7.5 after the reaction is finished, and carrying out water-phase free radical copolymerization; the binary polymer is obtained. The prepared polymer is used as an inhibitor in ore pulp, when the dosage is 100-500 g / t according to the mass of treated ore and the pH value of the ore pulp is 6-9, the pyrite recovery rate can be effectively reduced, the pyrite removal effect is improved, meanwhile, the influence on target mineral flotation is small, and the method is suitable for industrial production. The method does not need an organic solvent, the condition is mild, the product performance is stable, the repeatability is good, and the method is suitable for industrial preparation and application.

The invention discloses an oral membrane for treating schizophrenia and a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations. The invention aims to solve the technical problems of low dissolution rate and disintegration speed, difficulty in swallowing, high medicine hiding probability of patients, easiness in variation of medicines, complex composition and preparation process and certain side effects. The technical scheme is as follows: 1) the oral film agent comprises an active drug component lonanserin, a film-forming composition copovidone, polyoxyethylene and sodium hydrogen sulfite and a plasticizer polyethylene glycol, and the oral film agent can be delivered in an amorphous solid dispersion form, so that the oral film agent can maintain a supersaturated state in an intestinal environment, inhibit devitrification and improve the bioavailability of the oral film agent; therefore, more consistent and stable system exposure is obtained; 2) the sodium hydrogen sulfite serving as an antioxidant can reduce impurities in related substances of the blonanserin film agent;

The invention discloses high-molecular-weight polyacrylamide with strong anti-shearing force and large adsorption area, which is prepared from the following components in parts by weight: 90 to 100 parts of acrylamide, 10 to 15 parts of acrylic acid, 15 to 20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.01 to 0.03 part of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 0.1 to 0.3 part of butylated hydroxyanisole, 0.1 to 0.3 part of N, N-dimethylformamide, 0.1 to 0.3 part of N, N-dimethylformamide and the balance of water. The invention discloses a water-based cleaning agent which is prepared from the following components in parts by weight: 0.2 to 0.5 part of N, N '-methylene bisacrylamide, 0.025 to 0.03 part of ammonium persulfate, 0.025 to 0.03 part of sodium hydrogen sulfite, 0.005 to 0.008 part of 2-hydroxyl-4'-(2-hydroxyethoxy)-2-methyl propiophenone and 360 to 375 parts of deionized water. The invention also provides a preparation method and application of the high molecular weight polyacrylamide. The polyacrylamide provided by the invention has strong anti-shearing force and large adsorption area, can more efficiently capture and wrap pollutant particles, and greatly enhances the adsorption capacity and flocculation efficiency of suspended colloids, organic impurities and heavy metal ions.

The application discloses a tetraphenylstyryl-imidazole pyrazine derivative with AIE properties and application, and has the following structure: 4-(1,2,2-triphenylvinyl) benzaldehyde, 5,6-diaminopyrazine-2,3-dicyan, sodium bisulfite are placed in N,N-dimethylformamide, and are reacted at 150 DEG C for 12h; after reaction, the functional organic material C-1 is obtained through separation and purification. The obtained product C-1, methyl iodide and N,N-diisopropylethylamine are placed in N,N-dimethylformamide, and are reacted at 90 DEG C for 1-2h; after reaction, a tetraphenylstyryl-imidazole pyrazine derivative with AIE properties is obtained. The functional organic material disclosed by the application has the advantages of low preparation cost, simple operation, simple method, and the material shows significant AIE characteristics, and can be applied to technical fields of luminescent materials and inkless writing.

The invention relates to the technical field of coal mine dust prevention and control, in particular to a dual-network interpenetrating structure dust suppression material and a step-by-step polymerization dust suppression method in a coal seam. The dust suppression material is prepared from the following raw material components: hydroxypropyl methyl cellulose, hydroxypropyl acrylate, ammonium persulfate, acrylamide, N, N '-methylene bisacrylamide, sodium hydrogen sulfite, sodium dodecyl benzene sulfonate and deionized water, and the dust suppression material with the dual-network interpenetrating structure comprises a flexible network and a rigid network, the flexible network is a grafted product of hydroxypropyl methyl cellulose and hydroxypropyl acrylate, and the rigid network is polyacrylamide. Amido groups in the rigid network can further improve the adsorbability to dust, meanwhile, the rigid network and the flexible network form a double-network interpenetrating structure, so that the material has high water-retaining property, the double effects of chemical anchoring and physical wrapping on coal are achieved, the dust production rate in the mining process is reduced, dust production is reduced from the source, and the mining efficiency is improved. And long-acting dust suppression is achieved, and dust generated in the coal crushing process is reduced.

The invention relates to the technical field of peptide extraction, in particular to sipunculus nudus peptide and an extraction method and application thereof. According to the specific technical scheme, the method comprises the following steps: 1) crushing a sipunculus nudus raw material, adding water, adding sodium hydrogen sulfite and ascorbic acid, and stirring and soaking for 10-15 minutes; 2) grinding the soaked raw materials, and adjusting the pH value of the slurry to be alkaline; (3) adding alkali enzyme into the slurry, carrying out microwave enzymolysis for 45-50 minutes, adding papaya peptidase B, continuously carrying out microwave enzymolysis for 45-50 minutes, heating, inactivating, cooling, carrying out centrifugal filtration, and collecting filtrate; and 4) sequentially carrying out microfiltration, ultrafiltration and sodium filtration on the obtained filtrate to obtain the product. Microwave radiation is adopted for assisting enzymolysis, energy can be provided for an enzymolysis system, the temperature needed by enzymolysis can be maintained, the enzymolysis efficiency is greatly improved, the prepared sipunculus nudus peptide can stabilize iron ions, a safe and efficient iron supplementing preparation can be developed, meanwhile, reproductive function decline caused by obesity can be comprehensively repaired, the advantage of multi-dimensional conditioning is achieved, and the sipunculus nudus peptide has a good application prospect. And the method is suitable for metabolism-related reproductive disorder treatment.

The invention discloses an organic-inorganic hybrid rheology modifier for deep wells and ultra-deep wells as well as a preparation method and application thereof. The preparation method comprises the following steps: step (1), adding ammonium persulfate into an acrylamide aqueous solution for polymerization reaction to obtain polyacrylamide; (2) preparing a polyacrylamide solution, adding a formaldehyde aqueous solution and a sodium hydrogen sulfite solid, and carrying out a synthetic reaction to obtain sulfomethylated polyacrylamide colloid; step (3), uniformly mixing the sulfomethylated polyacrylamide colloid with N-vinyl caprolactam, and then adding azodiisobutyronitrile to carry out copolymerization reaction, so as to obtain SPAM-NVCL (Sulfonyl Polyacrylamide-NVCL) copolymer powder; and (4) wetting the SPAM-NVCL copolymer powder with a glutaraldehyde aqueous solution, then adding the silica sol nanoparticle dispersion liquid to carry out a curing reaction, and after the curing reaction is finished, carrying out spray drying to obtain the SPAM-NVCL composite material. The rheology modifier can solve the problems of poor high-temperature stability, low rheology regulation and control precision, non-ideal system compatibility and the like when the existing rheology modifier is used for well cementation of deep wells and ultra-deep wells.

The invention provides a method for determining the content of loganic acid in cosmetics, and relates to the technical field of cosmetic analysis. The determination method comprises the following steps: mixing a cosmetic sample with an extraction solvent which is a mixture of methanol, disodium ethylene diamine tetraacetate and sodium hydrogen sulfite, carrying out ultrasonic extraction and separation to obtain a supernatant, and carrying out elution purification and concentration through a solid-phase extraction column to obtain a sample to be detected; preparing a test solution, a standard stock solution and a mixed standard working solution; detecting the test solution by high performance liquid chromatography, drawing a standard curve to obtain a linear regression equation, and determining the content of loganic acid; the efficiency, accuracy, durability and the like of the method for testing the content of loganic acid in cosmetics are remarkably improved through a specific pretreatment method, an extraction solvent, a chromatographic column, the composition and proportion of a mobile phase, gradient elution conditions and the like.

This invention relates to the field of polymer material synthesis technology, specifically disclosing a water-dispersible cationic polyacrylamide material and its preparation method. The material is composed of the following raw materials in parts by weight: 45-50 parts modified acrylamide, 15-20 parts cationic monomer, 5-10 parts N-vinylpyrrolidone, 0.8-1.2 parts surfactant, 90-100 parts deionized water, 0.1-0.5 parts crosslinking agent, 3-8 parts hyperbranched polyester Boltorn (H₂O), 0.08-0.12 parts ammonium persulfate, 0.03-0.05 parts sodium bisulfite, and 0.5-0.8 parts aluminum citrate. The preparation process of this invention is simple and highly operable. The provided polyacrylamide material has a high specific surface area, excellent water dispersibility, good stability, and salt resistance, making it suitable for various industrial applications such as water treatment and papermaking, exhibiting good flocculation performance and reinforcing effects.

The invention discloses a high-elastic breathable antifouling sofa cover and a preparation method thereof, and relates to the technical field of sofa covers. R-3-butene-2-amino alcohol, maleic anhydride, sodium hydrogen sulfite and phosgene are subjected to a reaction to be formed, then grafted to the surface of hemp cotton yarn and polymerized with 4, 6-octadienoic acid and 1, 2-difluoro-3-(propyl-2-ene-1-yl) benzene, a surface hydrophilic and external hydrophobic structure is constructed, the surface energy of the sofa cover is reduced, the water resistance and oil resistance of the sofa cover are improved, and meanwhile the sofa cover has the advantages of being good in water resistance and oil resistance. The anti-static effect is improved, dust adsorption is reduced, complexation with silver ions is achieved, and the anti-fouling effect of the sofa cover is enhanced; 2-aminocaproic acid, 2-amino-3, 5-dimethylbenzoyl chloride, 2-chloroacetyl chloride and dioctyl methylamine are utilized to modify cotton yarns, quinazolinone and quaternary ammonium structures are introduced to the surfaces of fibers to synergistically inhibit the growth of bacteria and improve the antibacterial effect of the sofa cover, then the modified hemp cotton yarns are used as camlet, the modified cotton yarns are used as core yarns, and the sofa cover is prepared by twisting and spinning.

The present invention discloses Process for the preparation of corrugated cardboard glue from avocado seed starch. The process involves the starch extraction from avocado pits [በ ዉ solution of sodium metabisulfite (Na:S:0s) to subdue polyphenol oxidation during the extraction process. Afterwards, 2 L of water were added to the slurry, which was then socked for 24 hours. The residue or the brown milk was placed [በ 8 vacuum oven and dried at 50 for 24 hours. The cardboard glue, Coragum, was formulated from avocado seed starch, caustic soda, and borax. The obtained Coragum glue showed that the low gelation temperature or characterized by high viscosity with the range of 35 to 40 The final product was formulated by mixing starch powder with 5% NaOH and 3% BORAX for commercialization purposes. The binding performance was examined by sticking the three compartments of the cardboard (flute, test liner, and kraft papers) with burst test of 9 Kg Cm-3 and crust of 27 Lb which are equivalent to TAPPI ISO standand methods. These outsanding results paves a way in producing paper based products and packaging soulutions.

The invention discloses an organ maintenance liquid for repairing liver functions as well as a preparation method and application of the organ maintenance liquid. The feed additive comprises the following components: an oxygen-carrying component, succinyl gelatin, sodium chloride, sodium hydroxide, sodium bicarbonate, calcium gluconate, magnesium sulfate, chromium chloride, copper chloride, ferric chloride, manganese chloride, sodium molybdate, sodium selenite, zinc chloride, potassium iodide, sodium fluoride, isoleucine, leucine, lysine acetate, methionine, phenylalanine, threonine, tryptophan, serine, valine and histidine. The injection is prepared from arginine, alanine, asparaginic acid, cysteine, glutamic acid, proline, tyrosine, glycine, sodium hydrogen sulfite, heparin, methylprednisolone sodium succinate, broad-spectrum antibiotics, antifungal drugs, FXR agonists and sterilized water for injection. The oxygen-carrying component is washed red blood cells or concentrated red blood cells or artificial blood. The viscosity of the organ maintenance liquid is closer to that of plasma, the influence on the blood coagulation function and the renal function is avoided, and the organ maintenance liquid has higher safety, can treat ischemia reperfusion injury, repair the liver biliary tract function and remarkably reduce various inflammation indexes, and is used for ischemia-free liver transplantation.

The invention relates to the technical field of artificial board production, in particular to a blocked isocyanate formaldehyde-free adhesive and application thereof.The blocked isocyanate formaldehyde-free adhesive is prepared from, by weight, 100 parts of sodium hydrogen sulfite polyvinyl alcohol composite liquid for blocking, 5-15 parts of modified isocyanate and 10-20 parts of nano filler; wherein the modified isocyanate is obtained by reacting isocyanate with fatty alcohol-polyoxyethylene ether; the sodium hydrogen sulfite polyvinyl alcohol composite liquid for sealing is prepared by the following method: adding an organic silicon additive into a polyvinyl alcohol aqueous solution with the mass concentration of 5-10% for modification to obtain a modified polyvinyl alcohol solution, and adding a sodium hydrogen sulfite aqueous solution with the mass concentration of 25-30% while stirring. Tests prove that the pot life of the blocked isocyanate formaldehyde-free adhesive can reach 8-10 hours, the prepared plywood does not have glue failure after being boiled in boiling water for 72 hours, the blocked isocyanate formaldehyde-free adhesive can be directly suitable for a traditional plywood gluing process and equipment, and the convenience and reliability of industrial production are remarkably improved.

The invention discloses a self-cleaning wash-free fabric and a preparation method thereof, and relates to the technical field of fabrics. According to the invention, malic acid is utilized to connect each fiber, so that impurities are not easy to enter the fabric, and then malic acid reacts with maleic anhydride and sodium hydrogen sulfite, so that a sulfonic acid group-metal ion bond is formed on a side chain, the antistatic performance is improved, and the fabric is prevented from being stained with dust; the preparation method comprises the following steps: firstly, preparing a modified cotton fabric, then reacting the modified cotton fabric with 2-hydroxylauric acid, R-aminoethyl-B-aminopropyl trimethoxy silane, perfluorooctyltrimethoxy silane and hexamethyldisiloxane, and polymerizing to obtain the modified cotton fabric which has good waterproof and oil-proof properties; 3-amino-4-nitrobenzaldehyde and 3, 4-diamino propiophenone are utilized to form a benzotriazole group, the anti-ultraviolet effect of the fabric is effectively improved, the benzotriazole group, hydroxylamine hydrochloride and 2-bromoethanol generate an oxime ether compound, the growth of bacteria of the fabric is inhibited, epoxy resin is modified and then coated on the surface of the modified cotton fabric, the epoxy resin and the modified cotton fabric are combined through chemical bonds, and the anti-ultraviolet effect of the fabric is improved. The antibacterial property of the fabric is effectively improved.

This invention belongs to the field of dyeing and printing auxiliaries technology, specifically relating to a sulfonic acid-based polyamide-polyether copolymer hydrophilic finishing agent and its preparation method. The invention provides a method for preparing a sulfonic acid-based polyamide-polyether copolymer hydrophilic finishing agent, using maleic anhydride, polyetheramine, adipic acid, and hexamethylenediamine as raw materials. Through an amidation polycondensation reaction, a polyether-modified polyamide condensate is obtained. Sodium bisulfite solution is added to the polyether-modified polyamide condensate, and a sulfonation reaction is carried out at 120-140°C for 3-4 hours. After the reaction, water is removed to obtain the sulfonic acid-based polyamide-polyether copolymer hydrophilic finishing agent. It can improve the hydrophilicity of nylon fiber fabrics.

The present application provides a shrink-proof treatment method of cashmere fibers, and relates to the field of textile fiber treatment technology, which comprises the following steps: step 1, plasma pretreatment; step 2, composite enzymatic hydrolysis treatment; step 3, high molecular grafting treatment; step 4, cross-linking and curing treatment; and step 5, finishing treatment. The composite enzyme solution comprises papain, laccase, alkaline pectinase and sodium bisulfite. The present application provides a shrink-proof treatment method of cashmere fibers. Through the four-step composite process of plasma activation, composite enzymatic hydrolysis, biological high molecular grafting and cross-linking and curing, the directional friction effect of the scales of the cashmere fibers is weakened, a stable biocompatible protective layer is formed, the shrink-proof effect and the natural performance of the fibers are synergistically optimized, the preparation method of the core material, the equipment parameters and the process details are clearly defined, and the technical scheme is repeatable and controllable in industrial safety.

The invention discloses an antioxidant-free kanamycin injection and a preparation method thereof.The injection is composed of kanamycin sulfate, a pH regulator and water for injection, the pH is 4.5-7.0, headspace oxygen is controlled to be smaller than or equal to 1% through nitrogen charging, and the injection is completely free of sodium hydrogen sulfite, cysteine hydrochloride and other antioxidants and can be used for intravenous drip and intramuscular injection; the invention further provides a preparation process and an ion chromatography verification method which are compatible with an existing production line, and the product quality meets the requirements of Chinese Pharmacopoeia 2020 through high temperature, strong light and long-term stability test verification; clinical retrospective analysis shows that the rash occurrence rate is reduced to 3.1% from 27.3%, the safety is remarkably improved while the medicine quality is ensured, and the method has a good industrial application prospect.

The application belongs to the technical field of polyacrylamide synthesis, and particularly relates to a synthesis method of polyacrylamide for oil displacement. The synthesis method of polyacrylamide for oil displacement comprises the following steps: (1) pre-emulsification of 1H, 1H, 2H, 2H-octyl perfluoroacrylate; (2) preparation of an aqueous phase; (3) preparation of an organic phase solution; (4) polymerization reaction; and (5) post-treatment. The synthesis method of polyacrylamide for oil displacement uses acrylamide as a main monomer, uses 3-allyloxy-2-hydroxy-1-propanesulfonic acid sodium salt, 1H, 1H, 2H, 2H-octyl perfluoroacrylate and 1-methylacryloyloxyadamantane as functional monomers, uses a potassium persulfate solution-sodium bisulfite solution as an initiator system, and uses an aqueous phase micellar polymerization method to prepare the polyacrylamide for oil displacement, which has temperature resistance, salt resistance and shear resistance.

The invention relates to the field of grouting materials, and discloses a high-temperature-resistant grouting material as well as a preparation method and application thereof. The grouting material comprises aggregate, a fine admixture, a binding agent, a polycarboxylate additive, an additive and composite fibers; according to the polycarboxylate additive, isophorone diisocyanate, modified cardanol amine polyol and 2, 2-dimethylolpropionic acid are used for synthesizing a polyurethane prepolymer, then the polyurethane prepolymer, isopentenol polyoxyethylene ether, acrylic acid and polyethylene glycol-200 are used as raw materials according to a free radical polymerization reaction, mercaptoacetic acid is used as a chain transfer agent, and the polycarboxylate additive is prepared through a one-step polymerization method. The catalyst is prepared under the initiation of hydrogen peroxide, ammonium persulfate, sodium hydrogen sulfite and ascorbic acid. The modified cardanol amine polyol is prepared by reacting cardanol amine polyol prepared by reacting cardanol glycidyl ether with diethanol amine with bis (trimethylsiloxy) methylsilane. The grouting material prepared by the preparation method disclosed by the invention is resistant to pressure at normal temperature and high temperature, high in breaking strength and good in flowability, high temperature resistance and thermal shock resistance.

The invention discloses special polyacrylamide for papermaking for improving retention rate of paper pulp fiber and filler and water filtering performance, which is prepared from the following components in parts by weight: 60 to 70 parts of acrylamide, 25 to 30 parts of methacryloyloxyethyl trimethyl ammonium chloride, 15 to 20 parts of N-hexadecyl acrylamide, 0.01 part of isopropanol, 0.02 part of initiator V-50 and 0.03 part of ammonium persulfate. 0.02 part of sodium hydrogen sulfite and 440-450 parts of deionized water. The invention also provides a preparation method of the special polyacrylamide for papermaking. According to the invention, through unique molecular structure design and accurate synthesis process control, the maximization of charge neutralization and bridging synergistic effect is realized, so that polyacrylamide can significantly improve the retention rate of paper pulp fiber and filler, the water filtering performance of the pulp is greatly improved, and stable product quality and small batch-to-batch difference are ensured.

The invention relates to the technical field of veterinary drug preparations, and discloses a preparation method of a high-content oxytetracycline hydrochloride injection, which comprises the following steps: dissolving nicotinamide in a mixed solvent of dimethylacetamide and water in a weight-volume ratio of 40.0-60.0%, and adding sodium formaldehyde sulfoxylate; adding magnesium oxide and uniformly dispersing; controlling the temperature, adding oxytetracycline hydrochloride in batches, and dropwise adding monoethanolamine to control the pH value of the process and the end point to 8.0-8.5; raising the temperature of the feed liquid to 50-60 DEG C and carrying out constant-temperature reaction until the feed liquid is clarified; and then cooling, fixing the volume and filtering. Through the synergistic effect of nicotinamide and thermal excitation, the polymerization path of oxytetracycline and a magnesium complex is blocked by utilizing a competitive coordination mechanism, so that the problems that high-concentration liquid medicine is high in viscosity and poor in needle passing performance are effectively solved; meanwhile, a reduction system and accurate pH control are matched, so that the chemical stability and physical stability of the preparation are improved, and low viscosity and long-acting stability of the high-content oxytetracycline injection are realized.

The application belongs to the technical field of pharmaceutical preparations, and particularly relates to a carmellose tablet and a preparation method thereof. The carmellose tablet provided by the application is prepared by using carmellose as an active ingredient, and is combined with a filler, a disintegrant, a solubilizer, a stabilizer and a lubricant. The solubilizer is selected from glycine, the stabilizer is a compound system of sodium bisulfite and propylene glycol alginate, and the preparation method comprises the steps of preparing a premix, mixing materials, total mixing and tabletting. Through accurate selection of excipients, compounding and optimization of the preparation process, the dissolution performance and stability of the carmellose tablet are significantly improved, the content of the effective component of the drug is effectively maintained, the appearance is good, the preparation process is simple and controllable, and the application is suitable for industrial production, and the clinical application value of the drug is greatly improved.

The invention relates to the technical field of waterproof coatings, and particularly discloses an emulsion composition. Comprising the following components in parts by weight: 330 to 350 parts of butyl acrylate, 30 to 40 parts of styrene, 45 to 55 parts of methyl methacrylate, 15 to 20 parts of 2-ethylhexyl acrylate, 1.5 to 1.8 parts of acrylic acid, 85 to 95 parts of modified epoxy resin, 3.8 to 4.2 parts of an anionic emulsifier, 8.5 to 10.8 parts of a nonionic emulsifier, 13 to 18 parts of a cross-linking agent, 1.5 to 1.8 parts of an oxidant, 1.2 to 1.4 parts of tert-butyl hydroperoxide and 0.8 to 1.0 part of sodium hydrogen sulfite. 1 part of a sterilizing agent and 0.3-0.5 part of a defoaming agent; the modified epoxy resin is selected from one or two of perfluoropolyether modified bisphenol A epoxy resin and hyperbranched polyester-amine modified bisphenol A epoxy resin. The emulsion composition provided by the invention can be used for preparing the waterproof emulsion with good long-acting waterproofness and excellent mechanical properties, and has a good application prospect.

The invention discloses a life-prolonging and body-building paste and a preparation method thereof, and relates to the technical field of medicines, the life-prolonging and body-building paste is prepared by sequentially decocting, centrifuging and concentrating the following raw materials: codonopsis pilosula, ginseng, poria cocos, radix astragali preparata, roasted rhizoma atractylodis macrocephalae, Chinese yam, radix polygoni multiflori preparata, angelica sinensis, prepared rehmannia root, ligusticum chuanxiong hort, rhizoma alismatis, moutan bark, radix achyranthis bidentatae, radix paeoniae alba, folium cortex eucommiae, teasel root, donkey-hide gelatin, safflower carthamus, pseudo-ginseng, honey-fried licorice root, prepared rhizoma polygonati and pericarpium citri reticulatae; adding sugar into the concentrated clear paste; the preparation method of the sugar comprises the following steps: adding citric acid into cane sugar, and heating and dissolving to obtain the sugar. A centrifugal process is adopted, citric acid is added during preparation sugar refining, the problem of poor fluidity can be solved, sodium hydrogen sulfite and simethicone are further added, and the quality problems of foaming in the ingredient filling process, layering in the effective period, poor fluidity and the like of the product can be effectively eradicated.