229 results about "N-methylpyrrole" patented technology

Provided is a nonaqueous electrolyte secondary battery separator including a porous film containing polyolefin as a main component, the nonaqueous electrolyte secondary battery separator having a time until temperature rise cessation with respect to an amount of resin per unit area of 2.9 sec·m2 / g to 5.7 sec·m2 / g, the time being obtained in a case where the nonaqueous electrolyte secondary battery separator is impregnated with N-methyl pyrrolidine containing 3 wt % water and is subsequently irradiated, at an output of 1,800 W, with a microwave having a frequency of 2,455 MHz, the nonaqueous electrolyte secondary battery separator having an excellent initial rate characteristic and being capable of preventing a deterioration in rate characteristic which deterioration is caused by repeated charge and discharge.

The invention relates to a method for synthetizing aqueous polyurethane emulsion from package waste PET bottles. The aqueous polyurethane emulsion comprises the following raw components in parts by weight: 17 parts of isophorone diisocyanate, 32 parts of polypropylene glycol, 3.5 parts of dimethylolpropionic acid, 2.5 parts of waste PET alcoholysate, 5 parts of triethylamine, 7 parts of N-methyl pyrrolidone, 8 parts of acetone, 70 parts of deionized water and 0.5 part of dibutyltin dilaurate. The method disclosed by the invention has the advantages that the waste PET bottles are subjected to alcoholysis to generate waste PET alcoholysate with hydroxyl reaction activity, and the waste PET alcoholysate serves as a small molecule chain extender in the aqueous polyurethane emulsion synthetizing to participate in the chain extension reaction of aqueous polyurethane prepolymer, so that the waste PET alcoholysate is successfully grafted on the aqueous polyurethane molecular chain and the aqueous polyurethane emulsion with excellent performances is synthetized; the increasingly serious environmental pollution problem brought by the waste package polymer PET bottles is solved.

The present invention discloses an aqueous diamond grinding fluid with continuously suspending abrasives and a preparation method thereof, and belongs to the technical field of precision and ultra precision grinding processing. The grinding fluid comprises the following components in parts by weight: 0.1-5 parts of diamond abrasives, 0.01-2 parts of alkylphenol polyoxyethylene ether, 1-5 parts of modified polyurea N-methylpyrrolidone, 1-5 parts of N-methylpyrrolidone, 30-60 parts of an organic solvent, and 23-67.89 parts of water. According to the preparation method disclosed by the present invention, by using a surface modifying method, the diamond abrasives are modified by the alkylphenol polyoxyethylene ether, the modified diamond abrasives can be stably adsorbed on a molecular chain of the modified polyurea N-methylpyrrolidone; the bonding force between two is enhanced; meanwhile, by using the spatial network structure of a modified polyurea N-methylpyrrolidone molecule, the diamond abrasives are prevented from settling and aggregating to realize continuous suspending of the diamond abrasives, so that uniformly mixing operation before using the grinding fluid is saved, and the convenience in use is improved.

The invention relates to a method for purifying N-methyl pyrrolidone. The method comprises the steps of (1) washing poly-p-phenylene terephthamide polymers obtained after the polycondensation through deionized water repeatedly to obtain washing liquor containing the N-methyl pyrrolidone (NMP), adding antalkali into the washing liquor to perform neutralizing treatment, and regulating PH of the solution to 6-7; (2) performing extraction separation on the washing liquor to obtain solution with an NMP-extraction agent system on the lower layer and a water-inorganic salt system on the upper layer, and performing secondary extraction on the water-inorganic salt system on the upper layer; and (3) adding an organic solution with an isocyanic acid functional group into a crude product of the NMP, and performing filtering and distillation to obtain the high-purity NMP. By means of the method, the purity of the finally-obtained NMP solvent is remarkably improved, processing procedures are simplified, accordingly, working efficiency is improved, and operability is strong. Furthermore, the purity of the NMP solvent obtained by means of purifying is higher than 99.8%, and the water content of the NMP solvent is smaller than 0.01%.

Compounds acting as selective antagonists of Transient Receptor Potential cation channel subfamily M member 8 (hereinafter referred to as TRPM8), having formula:WhereinR is selected from:H, Br, CN, NO2, SO2NH2, SO2NHR′ and SO2NR′2, where R′ is selected from linear or branched C1-C4 alkyl;X is selected from:F, Cl, C1-C3 alkyl, NH2 and OHY is selected from:O, CH2, NH and SO2R1 and R2, independently one from the other, are selected fromH, F and linear or branched C1-C4 alkyl;R3 and R4, independently one from the other, are selected fromH and linear or branched C1-C4 alkyl;Z is selected from:NR6 and R6R7N+, where R6 and R7 independently one from the other, are selected from:H and linear or branched C1-C4 alkylR5 is a residue selected from:H and linear or branched C1-C4 alkylHet is a heteroaryl group selected froma substituted or not substituted pyrrolyl, a substituted or not substituted N-methylpyrrolyl, a substituted or not substituted thiophenyl, a substituted or not substituted furyl and a substituted or not substituted pyridinyl.Said compounds are useful in the prevention and treatment of pathologies depending on TRPM8 activity such as pain, inflammation, ischaemia, neurodegeneration, stroke, psychiatric disorders, inflammatory conditions and urological disorders.

The invention discloses a waterborne polyurethane, comprising the following components in parts by weight: 10-17 parts of isophorone diisocyanate, 22-32 parts of polyethylene glycol, 0.5-3.5 parts of hydrophilic chain extender, 0.1-3 parts of 1,4-butanediol, 1-5 parts of potassium hydroxide, 4-7 parts of N-methyl pyrrolidone, 3-8 parts of acetone, 50-70 parts of hydrogen peroxide and 0.05-0.1 parts of dibutyltin dilaurate. According to the preparation method of the waterborne polyurethane disclosed by the invention, water is decomposed by adopting hydrogen peroxide in a reaction process while the traditional chain-extending emulsification and dispersion reaction on a waterborne polyurethane prepolymer by directly adding water are replaced, and the emulsification, chain extension, dispersion, and the like can be more evenly carried out, so that the waterborne polyurethane with balanced performance is obtained, and the problems of uneven emulsification and chain extension of water on the prepolymer, and poor overall performance of the waterborne polyurethane caused by over-large viscosity of the existing waterborne polyurethane prepolymer are solved.

The invention discloses a dairy cow nipple antifreezing disinfector. The disinfector comprises the following ingredients in part by weight: 3-6 parts of polymer film-forming agent, 50-60 parts of water, 1-2 parts of organic acid, 0.1-1 parts of thickener, 1-10 parts of skin-friendly agent, 20-60 parts of antifreezing agent, 0.05-0.5 parts of potassium iodate, and 0.1-1 parts of potassium iodite, wherein the polymer film-forming agent comprises the following ingredients in part by weight: 40-60 parts of water, 5-15 parts of PVP (polyvinyl pyrrolidone), 5-15 parts of N-methylpyrrolidone, and 20-40 parts of waterborne polyurethane emulsion. The dairy cow nipple antifreezing disinfector can form a layer of dense membrane on the dairy cow nipple to protect the dairy cow nipple from freezing and invasion of bacteria, and the formed protecting membrane is easy to wash away. In the meantime, the invention further discloses a preparation method of the disinfector. The preparation method is simple and safe to operate, and easy for industrial production.

The invention relates to the field of composite fertilizers, and specifically relates to a long-acting sustained-release composite fertilizer comprising wood fiber. The fertilizer is prepared from the raw materials of, by weight, 10-15 parts of diatomite with a specification of 1250-2000 meshes, 10-12 parts of potassium chloride, 18-20 of ammonium carbonate, 12-15 parts of crop straws, 2-4 parts of zinc sulfate, 10-12 parts of calcium superphosphate, 3-5 parts of boron-magnesium fertilizer, 1-3 parts of ferrous sulfate, 12-13 parts of rice bran, 6-8 parts of calcium hydrogen phosphate, 6-8 parts of composted goose dung, 2-3 parts of a BGB microbial agent, 1-3 parts of xylanase, 10-12 parts of wood vinegar liquid, 1-3 parts of wood fiber with a specification of 400 meshes, 10-12 parts of cellulose acetate, 15-18 parts of N-methylpyrrolidone, 1-2 parts of calcium lignosulfonate, 1-2 parts of ethyl para-hydroxybenzoate, 1-2 parts of nano-grade carbon, and 4-5 parts of an auxiliary agent. The composite fertilizer provided by the invention has wide raw material sources, and rich and multi-element nutrients. In a production process, with diatomite and a sustained-release coating agent comprising wood fiber and nano-grade carbon, dual coating can be formed upon the nutrients. The composite fertilizer has excellent and long-lasting sustained-release control capacity, and water-retention and drought-resistant capacities. The fertilizer effect is more long-lasting, and the fertilizer is green and highly efficient. With the fertilizer, crop yield and quality can be substantially improved.

The invention discloses lithium battery positive pole slurry containing Ketjen superconducting carbon black, as well as a preparation method and application thereof. The lithium battery positive pole slurry comprises the following components in parts by weight: 80 parts of lithium iron phosphate positive pole active material, 1-10 parts of Ketjen superconducting carbon black, 5-20 parts of polyvinylidene fluoride, and 500-1100 parts of N-methyl-2-pyrrolidone. The preparation method comprises the following steps of: mixing and dispersing the Ketjen superconducting carbon black and polyvinylidene fluoride bonder bonder, then adding the lithium iron phosphate positive pole active material, mixing and dispersing, pouring the slurry into a sand mill to be milled, and obtaining the lithium battery positive pole slurry containing the Ketjen superconducting carbon black. According to the invention, the problem that a pole piece is dropped off because the lithium battery positive pole slurry uses the Ketjen superconducting carbon black is solved, the dosage of conductive additive is small, the dried positive pole material is not easy to drop off, and the specific capacity of the lithium battery material is improved.

The invention discloses an aluminum alloy quenching medium. The invention is characterized in that the quenching medium is prepared from the following raw materials in parts by weight: 0.5-1 part of N-methylpyrrolidone, 3-5 parts of sodium chloride, 0.5-1 part of lauric acid, 0.5-1 part of lauroyl diethanolamine, 1-2 parts of mannitol, 2-4 parts of glycerol, 1-2 parts of urea, 0.5-1 part of sodium carboxymethyl cellulose, 0.5-1 part of sodium bicarbonate, 0.3-0.5 part of sodium lignosulfonate, 1-2 parts of water-soluble lanolin, 3-5 parts of assistant and 70-80 parts of water. The quenching medium satisfies the deep quenching requirements; the treated workpiece has the advantages of high hardness, favorable tensile property and long service life; and the quenching medium effectively prevents cracking and is suitable for aluminum alloy quenching.

The invention relates to technology for synthesizing an intermediate in the medicinal and chemical industry, in particular to a catalyst for catalytic synthesis of N-methylpyrrolidine and a synthesis method thereof. The catalyst consists of a carrier and a catalytic activity component, wherein the carrier is a gamma-Al2O3 or HZSM series molecular sieve; the catalytic activity component is a simple substance of metal M or an oxide thereof; the catalytic activity component accounts for 0.5 to 20 percent of the total weight of the catalyst; and the granular size of the catalyst is 4 to 20 meshes. The catalyst is prepared by a kneading and extruding method or a dipping method. The catalyst has the advantages of simple preparation, low price of raw materials and easy purchase; and when used the catalytic synthesis of N-methylpyrrolidine, the catalyst has the advantages of mild catalytic reaction condition, low three-wastes and no pollution, wherein the conversion rate of tetrahydrofuran is substantially kept over 80 percent and the yield of the N-methylpyrrolidine is substantially kept over 60 percent.

The invention discloses a scavenger for outdoor adlet. The scavenger for the outdoor adlet consists of the following components in parts by weight: 20 to 40 parts of dichloromethane, 15 to 25 parts of dichloroethane, 15 to 25 parts of tributyl phosphate, 15 to 20 parts of phenol, 2 to 4 parts of N-methylpyrrolidone, 15 to 25 parts of formic acid, 2 to 6 parts of nonylphenol polyoxyethylene ether and 0.2 to 0.8 part of butylcellosolve. The scavenger for the outdoor adlet can be prepared by stirring and mixing the components uniformly. After the scavenger for the outdoor adlet is sprayed on the surfaces of walls, glass, cement rods and the like polluted by the adlet, the adlet can be eliminated by brushing with a brush and washing with clean water, so primer is not damaged, the washing speed is high, and the surfaces are clean as new after washing.