44results about How to "No crystal" patented technology

The concrete water reducing agent of polyacrylic acid is prepared through esterification between polyglycol and acrylic acid to obtain esterified product, and the copolymerization of the esterified product with acrylic acid, 2-acrylamide-2-methyl propenyl sodium sulfonate and other sulfonate with unsaturated double bond. The concrete water reducing agent has weight average molecular weight of 20000-60000, concrete water reducing rate over 35 %, concrete compression strength raised by 100-300 % in 3 days, 40-80 % in 28 days and 30-50 % in 90 days, no loss in 2-hr slump of concrete, raised concrete placeability, etc. and is suitable for matching with flyash, slag and other active admixture to prepare high performance concrete.

A maleic anhydride series water-reducing agent for concrete is prepared through reaction between methoxy polyethanediol and maleic anhydride to generate monomethoxy polyethanediol maleate, and copolymerizing on 2-acrylamide-2-sodium methylpropyl sulfonate. Its advantages are high water-reducing effect, low content of alkali, and high flowability and low slump of concrete.

The invention provides a heatproof lyoprotectant for a live vaccine against pseudorabies. The heatproof lyoprotectant comprises, by weight, 3 to 10 parts of gelatin, 1 to 5 parts of trehalose, 5 to 15 parts of sucrose, 0.1 to 2 parts bovine serum albumin, 1 to 8 parts of tryptone, 2 to 10 parts of enzyme-hydrolyzed casein, 1 to 5 parts of thiourea, 0.8 to 2 parts of L-monosodium glutamate, 0.1 to 3 parts of arginine, 0.5 to 5 parts of polyvinylpyrrolidone (PVP-K30) and 0.1 to 2 parts of mannitol. The invention also discloses a preparation method of the heatproof lyoprotectant and a lyophilized vaccine prepared from the heatproof lyoprotectant. When the heatproof lyoprotectant is used for protecting the vaccine and a specific lyophilization process is employed, lyophilization loss of viruses can be effectively reduced, the temperature tolerance of the viruses can be improved, and the vaccine can still maintain good physical properties and titer after long-term storage; i.e., the vaccine has stable characters and has the characteristics of heat resistance and long storage time.

The invention discloses a polycarboxylate water reducing agent, which is a water reducing agent containing side chains of carboxy, sulfo and polyoxyethylene and prepared from monomers such as allyl polyether, acrylic acid and/or derivatives thereof, sodium methallyl sulfonate and aliphatic mercapto acid through polymerization reaction of free radicals and neutralization under an H2O2-Vc oxidation-reduction initiating system. The polycarboxylate water reducing agent is low in alkali content, high in water reducing rate and labor-saving in concrete operation; a cement mixture has high flowability, high slump loss resistance and good workability; and the polycarboxylate water reducing agent serving as an important component of high-performance concrete can be widely applied to premixed and cast-in-place concrete of various industrial and civil buildings, and particularly, has excellent performance in high-strength concrete.

The invention relates to a universal polycarboxylic acid water reducing agent and a preparation method thereof. The universal polycarboxylic acid water reducing agent is of a liquid state and has the solid content of 40%. The universal polycarboxylic acid water reducing agent is the water reducing agent which is prepared from monomers such as allyl polyether, and maleic anhydride, (meth)acrylic acid or itaconic acid, methyl acrylate and sodium methallyl sulfonate through polymerization under the effects of a molecular weight chain initiator and a chain transfer agent and neutralization; and the water reducing agent contains carboxyl, sulfonic group and an allyl polyether side chain. The universal polycarboxylic acid water reducing agent disclosed by the invention is low in alkali content, high in water-reducing rate, labor-saving in concrete operation, simple in production process, easy in reaction condition control and free of environmental pollution; the cement mixture has high mobility and slump keeping property, and good peaceability; and the universal polycarboxylic acid water reducing agent disclosed by the invention can be used as an important component of high-performance concrete, and can be widely applied to stirred and cast-in-place concrete and ready-mixed concrete for various industrial and civil buildings.

The invention discloses a polyurethane reaction ball which is a microcellular polyurethane elastomer prepared through raw materials including polymer component A and prepolymer component B. The invention further discloses a method for preparing the reaction ball, which includes: mixing and stirring polyether polyols, foaming agents, chain extenders, color paste and catalysts to obtain the polymer component A; and evenly mixing and stirring the polymer component A and the prepolymer component B according to a certain proportion at temperature of 5-32 DEG C, and pouring the mixture into a reaction ball mold for aging to obtain the polyurethane reaction ball. The foam density of the reaction ball is 100-600kg/m<3>, hardness of the reaction ball is Shore A40+/-10, free-falling resilience can reach 80-90%, and property requirements of high-level reaction balls are met. In addition, the polyurethane reaction ball and the preparing method thereof have good technology processing characteristics, spalling during contraction and mold opening is avoided, and product defective percentage is reduced.

The invention relates to table rose sauce and a preparation method thereof. The preparation method comprises the following steps: performing superfine grinding on edible rose petals to obtain rose powder; mixing the rose powder, glucose syrup, white granulated sugar and purified water, adjusting the pH value to be 1.8-2.2 by using citric acid to obtain a mixed solution, and heating the mixed solution to obtain a rose solution with sugar content of not less than 50%; adding pectin and salt into the rose solution, and boiling to obtain rose sauce; sterilizing the rose sauce in a water bath with temperature of 80-85 DEG C to obtain a finished product of rose sauce. According to the preparation method, the technical problems of instable quality and poor sensory quality of rose sauce in the prior art are solved, and the table rose sauce is stable in quality, bright in color, fragrant in smell, comfortable in mouth feel and wide in application range.

The invention relates to a method for preparing an ultra-low hydration-heat polycarboxylate-based water reducing agent. Methacrylic acid and Monomer methylacrylic acid polyethylene glycol single armor ether ester (MAAMPEA) water solution, initiator and modifier solution are simultaneously and slowly added into the solvent water drop by drop within 6 to 7 hours at the temperature of 80 DEG C to 90 DEG C, then the solvent water is subjected to thermal insulation for 4 to 5 hours at 90 DEG C to 95 DEG C and is naturally cooled down to the room temperature, and finally NaOH is used to adjust the pH value to 7 to 8, thereby obtaining the ultra-low hydration-heat polycarboxylate-based water reducing agent. The reaction conditions are easily controlled, no organic solvent is used during the polymerization process, and the process is simple with no industrial pollution. The concrete prepared by adopting the ultra-low hydration-heat polycarboxylate-based water reducing agent has the advantages as follows: when the mixing amount of the water reducing agent with the concentration being 25 wt percent is 1.0% of the concrete weight, the water reducing ratio can reach 30 percent, the 3d compressive strength of the concrete can be improved by more than 60 percent, the 28d compressive strength can be improved by more than 50 percent, and the 90d compressive strength can be improved by 30 percent.

The invention belongs to the technical field of polyurethane synthesis, and discloses polyether ester polyurethane, a method for preparing the same and application of the polyether ester polyurethane.The method includes adding initiators and catalysts I into 1,5-di-oxacycloheptane-2-ketone to obtain mixtures, carrying out reaction on the mixtures in solvents I at the temperature of 20-60 DEG C and synthesizing poly-1,5-di-oxacycloheptane-2-ketone polyether ester diol; adding the poly-1,5-di-oxacycloheptane-2-ketone polyether ester diol into diisocyanate and solvents II to obtain mixtures, heating the mixtures until the temperatures of the mixtures reach 60-100 DEG C, adding catalysts II into the mixtures, carrying out reaction to obtain prepolymers, then adding chain extenders into the prepolymers, carrying out reaction, and cooling mixed systems until the temperatures of the mixed systems reach the room temperature so as to obtain the polyether ester polyurethane. The1,5-di-oxacycloheptane-2-ketone is used as a monomer for the polyether ester polyurethane. The polyether ester polyurethane, the method and the application have the advantages that the polyether ester polyurethane isgood in biocompatibility, is amorphous and can be used for degrading polyurethane elastomers, and the degradation rate can be controlled.

The invention discloses an aloe gel rose jam preparation method, which comprises the following steps that aloe is peeled, the obtained aloe pulp is cut into diced aloe pulp, and the diced aloe pulp is placed into water for boiling, drained and screened to obtain aloe particles; petals of edible rose flowers are cleaned after screening and removing impurities, and then are shredded or sliced to obtain treated petals; and the treated petals, sugar and thickener are added into the aloe particles for uniformly mixing, and then conventional sterilization is carried out to obtain the aloe gel rose jam. The flavor and the taste of the aloe jam prepared by adding the edible rose flowers are greatly changed, and the special plant flavor of the aloe is covered by the strong rose fragrance, so that the product is more popular with the public. The aloe gel rose jam is in the form of a light red glue, free from extraneous odor, moderate in sour and sweet, free of obvious layering and water absorption, and free of crystallization; the aloe gel rose jam has specific taste and flavor of aloe vera gel and rose; the color is attractive; the color and the taste are not liable to change; and the shelf life is long.

The invention discloses a production method of a water-soluble ammonium polyphosphate liquid. The method comprises the following steps: taking industrial phosphoric acid, liquid ammonia and gas ammonia as raw materials, preparing a high-temperature molten material through a tubular neutralization polycondensation reaction and a polymerization-kettle further neutralization condensation polymerization, and then carrying out cooling in a water-soluble ammonium polyphosphate water agent preparation tank with a cooling jacket for preparing the ammonium polyphosphate liquid. A water-soluble ammoniumpolyphosphate solid does not need to be prepared firstly, and the water-soluble ammonium polyphosphate water agent can be directly produced on a device. The production process is short, the equipmentinvestment is small, the production operation is simple and convenient, the product quality is good, and the production cost is low.

The invention discloses a freezing-drying method for live vaccine. The freezing-drying method comprises the steps that the eutectic point range of a to-be-frozen and to-be-dried vaccine is tested, then, the live vaccine is placed in a vacuum freezing-drying machine pre-cooled to 0+/-1 DEG C, when the temperature of a plate layer of the vacuum freezing-drying machine is reduced to be higher than the eutectic point of the live vaccine by 1-2 DEG C, the current state is kept for 1-2 h, and continuous cooling is conducted with the rate of 1 DEG C/h till all vaccine is frozen; and cooling is immediately conducted to the temperature needed for sublimation, and finally vacuum sublimation is conducted according to the normal procedure. The product obtained through the method is not provided with large ice crystals, sublimation is easy, and after freezing-drying, a good product physical behavior can be obtained, and the freezing-drying titer losses are minimal.

The invention belongs to the field of liquid fertilizers, and particularly relates to a clear liquid type organic high nitrogen fertilizer comprising the raw materials in parts by weight: 11 to 16.5 parts of pure water, 26.5 to 27.5 parts of urea, 33.5 to 35.5 parts of ammonium nitrate, 0.5 to 0.65 part of organic acid, 0.5 to 0.65 part of 85% phosphoric acid, 22 to 24 parts of polymeric alcohol and 0.5 to 0.7 part of potassium hydroxide. The invention also discloses a preparation method of the high nitrogen fertilizer, wherein the preparation method comprises the following steps: (1) adding pure water into a reaction kettle, starting a stirrer, slowly adding the potassium hydroxide and the organic acid, and stirring until the potassium hydroxide and the organic acid react completely; (2) adding the urea and the polymeric alcohol into the reaction kettle, stirring, then adding the ammonium nitrate, and continuously stirring until no visible substance appears; (3) adding 85% phosphoric acid into the reaction kettle, turning on heating equipment of the reaction kettle, and stirring until the reaction is complete and the solution system is stable; and (4) standing the materials in the reaction kettle to normal temperature, filtering, and carrying out sampling inspection. The clear liquid type organic high nitrogen fertilizer is prepared in a chemical reaction and physical mixing mode, and the product is comprehensive in nutrient, stable in character and remarkable in fertilizer efficiency.

The present invention provides an extraction method of tobramycin. The extraction method comprises the following steps: (1) pH of a 5'carbamoyl tobramycin fermentation filtrate is adjusted to be 7.0-7.5, a cationic resin is added for absorption, water and ammonia water are used for rinsing, and an ammonia water eluent is collected; (2) the eluent is concentrated; (3) the obtained concentrate is hydrolyzed at an alkaline condition, pH of a hydrolyzate is adjusted to be 5.0-6.0, a cationic resin is used for decolorizing, a decoloring solution is connected, pH is adjusted to be 7.0-7.5, a medium-pressure chromatography self-prepared column equipped with a cationic resin is eluted with the water and ammonia water to collect an ammonia water eluent, then a strong alkaline anion resin is used for decoloring, and a decoloring solution is connected; and (4) the obtained decoloring solution is concentrated and then decolorized with activated carbon, and then spray-drying is conducted to obtaina finished product of the tobramycin. The method simplifies production processes, uses super nanofiltration, combines the medium-pressure chromatography self-prepared column technology, shortens production cycle, is free of solvent crystals and residual solvents, and reduces environmental discharge and treatment pressure.

The invention relates to a herbicide composition, in particular to a herbicide composition taking an oleic acid alcohol ester-containing surfactant as a stabilizer and synergist. The herbicide composition comprises the following components in percentage by weight: 1-95% of an active component, 1-10% of an oleic acid alcohol ester-containing surfactant as a stabilizer and synergist, and the balance of other components, totaling 100%. The active component is a composition of clomazone. The clomazone weeding composition taking the oleic acid alcohol ester-containing surfactant as a stabilizer and synergist has stable physical and chemical properties, is qualified in various detection indexes within the shelf life of the product, and is free of crystallization and caking in 90 days at the temperature of -18 DEG C. A preparation of the weeding composition is mainly used for preventing and controlling annual gramineous weeds and broadleaf weeds in soybean, peanut, sugarcane, rape, potato and rice fields.

The invention discloses a disinfection solution used at a low temperature of -18 DEG C, and belongs to the technical field of disinfection solutions. The disinfection solution is specifically prepared from, by weight, 26% of calcium chloride, 1000-2000 ppm of sodium hypochlorite, 0.1% of sodium chloride, 0.0005% of sodium carbonate, and the balance of water. A preparation method of the disinfection solution comprises the following steps: (1) weighing raw materials for later use; (2) dissolving calcium chloride in water, and filtering to obtain a calcium chloride solution; adding a sodium hypochlorite solution into the calcium chloride solution, and dissolving to obtain a mixed solution; and (3) adding sodium carbonate into the mixed solution while stirring, adding a pH regulator to regulate the pH to 11-12 after the sodium carbonate is dissolved, continuously stirring for 15 minutes, and filtering to obtain the disinfection solution used at the low temperature of -18 DEG C. The disinfection solution provided by the invention can be kept in a liquid state at the low temperature of -18 DEG C, is free of precipitation and crystallization, and can effectively kill harmful germs at the low temperature of -18 DEG C.

The invention discloses a decomposition-resistant PS conductive masterbatch. The decomposition-resistant PS conductive masterbatch includes the following raw materials by weight percentage: 5-10% of superconducting carbon black, 30-60% of high-impact polystyrene, toughened 18 to 30% of antioxidants, 3 to 9% of reinforcing agents, 0.2 to 0.8% of coupling agents, 0.2 to 1.2% of antioxidants, 0.2 to 1.2% of EBS, and 3 to 8% of EMA. In the present invention, superconducting carbon black is used as the conductive carrier, high impact polystyrene PS is used as the base material, and compound toughening agent, reinforcing agent, coupling agent, antioxidant, EBS and EMA are respectively used as lubricants. , dispersant and compatibilizer are compounded according to the appropriate ratio, and the obtained decomposition-resistant PS conductive masterbatch has excellent high temperature resistance and physical and mechanical properties; the decomposition-resistant PS conductive masterbatch can not only be used in polycarbonate and other needs The antistatic materials produced by high temperature co-extrusion can also be used in corresponding conductive and antistatic packaging materials such as electronics, electrical appliances, communications, aerospace, etc., to achieve safe and effective ESD protection for packaged electronic products.