107 results about "2-imidazolidinone" patented technology

Disclosed is a polishing composition which realizes both high planarity and reduction of corrosion in the surface of a wiring metal. Specifically disclosed is a polishing composition containing an oxidizing agent (A), at least one or more acids (B) selected from amino acids, carboxylic acids having 8 or less carbon atoms and inorganic acids, a sulfonic acid (C) having a concentration of not less than 0.01% by mass and an alkyl group having 8 or more carbon atoms, a fatty acid (D) having a concentration of not less than 0.001% by mass and an alkyl group having 8 or more carbon atoms, and at least one or more compounds (E) selected from pyridinecarbonyl compounds, nonionic water-soluble polymers, 2-pyrrolidone, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, gramine, adenine, N,N'-diisopropylethylenediamine, N,N'-bis(2-hydroxyethyl)ethylenediamine, N,N'-dibenzylethylenediamine and N,N'-diphenylethylenediamine.

The invention discloses a method for rapid optical clearing of biological tissues. The method includes: employs a strong polar aprotic solvent to conduct degreasing, wherein the strong polar aprotic solvent can be methyl methacrylate, hexamethylphosphoric triamide, N-methyl pyrrolidone, 1, 3-dimethyl-2-imidazolidinone, 1, 4-dioxane or 2, 5-dimethylfuran, then selecting a specific refractive index matching reagent with a refractive index of 1.52-1.59 to conduct clearing treatment, thus realizing rapid clearing of biological tissues. The degreasing and clearing treatment totally need only 18h to realize high clearing of mouse brain tissues, the method not only can realize brain tissue clearing, but also can achieve clearing of various organs, can well maintain the original morphology of biological tissues, and has high clearing degree and repeatability, and good fluorescence retaining effect, the soma and nerve fiber have strong fluorescence signal, and the application range is wide.

Disclosed is a liquid crystal alignment agent which can reduce microscopic irregularities on the surface of liquid crystal alignment films, improves liquid crystal alignment properties, and has improved electrical characteristics of every kind. The liquid crystal alignment agent contains component (A), component (B) and component (C). Component (A): a polyamic acid ester obtained from a tetracarboxylic acid dialkyl ester derivative containing a tetracarboxylic acid dialkyl ester derivative represented by general formula (1) as at least 60 mol% of the total tetracarboxylic acid dialkyl ester derivative, and a diamine containing at least one diamine selected from the diamines represented by general formulae (2-5). Component (B): a polyamic acid obtained from a tetracarboxylic acid dianhydride, and a diamine. Component (C): a mixed solvent containing at least one type of organic solvent (C1) selected from a group comprising -butyrolactone and derivatives thereof, and at least one type of organic solvent (C2) selected from a group comprising N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, and derivatives thereof, and in which the content of the organic solvent (C2) is 2%-30% by mass relative to the total amount of both organic solvents (C1, C2). (In general formula (1), R1 is a C1-5 alkyl group, and R2 is a hydroxyl group or a chlorine atom.) (In general formulae (2-5), A1 is a single bond, an ester bond, an amide bond, thioester bond, or a C2-10 divalent organic group, A2 is a halogen atom, a hydroxyl group, an amino group, a thiol group, a nitro group, a phospate group, or a C1-20 monovalent organic group, a is an integer from 1-4, and when a is 2 or higher, the structure of A2 can be the same or different).

The invention belongs to the field of drug preparation and particularly relates to a purification technology of a synthetic drug. The method comprises the steps of adding a methanol solvent and a dipyridamole crude product into methyl benzenesulfonic acid and 1-(3-aminobenzene)-3-methyl-2-imidazolone, stirring for reaction to form a sulfonate intermediate product, mixing the sulfonate intermediate product and a 70% methanol solution for dissolving, adding alkaline liquor to regulate pH (potential of hydrogen) of a system to 8-8.5, then adding active carbon, carrying out heating, decoloring, stirring and press filtration, cooling filtrate, and carrying out centrifuge, washing and drying to form purified high-purity dipyridamole.

Provided is a polyamide-imide resin composition for lubricating coating materials which retains the excellent heat resistance (i.e., high glass transition temperature) and mechanical strength (i.e., high modulus) inherent in polyamide-imide resins and in which the resin has excellent solubility in the solvents including gamma-butyrolactone, which is a non-amide solvent, and the dissolved state can be maintained for a long time even when the solvents are in the state of being apt to easily absorb moisture. The polyamide-imide resin composition for lubricating coating materials is characterized by containing a polyamide-imide resin that contains the repeating unit represented by formula [I] in an amount of 50 mol% or more of all the repeating units contained in the structure of the polyamide-imide resin and by containing gamma-butyrolactone and 1,3-dimethyl-2-imidazolidinone as solvents.

The invention belongs to the technical field of aldehyde elimination, and provides a nano oxidation aldehyde-free floor, a production method thereof, a nano oxidation aldehyde-eliminating liquid and aeucalyptus-rosemary nano aldehyde-eliminating liquid. The nano oxidation aldehyde-eliminating liquid is prepared by compounding modified chitosan, an osmotic agent, 2-imidazolidinone, nano zinc oxide, nano silicon oxide, and deionized water according to a certain ratio; and has the advantages of strong adhesion force, excellent permeability, good aldehyde-eliminating effect, and long acting effect. The eucalyptus-rosemary nano aldehyde-eliminating liquid is prepared by compounding the nano oxidation aldehyde-eliminating liquid, eucalyptus leaf oil, and rosemary oil according to a certain ratio and is capable of reducing released formaldehyde, killing bacteria and mites, and preventing mold. By adding the eucalyptus-rosemary nano aldehyde-eliminating liquid during the process of hot-pressing a fiber board and decorative paper, the amount of released formaldehyde is reduced, and at the same time, the product has the functions of killing bacteria and mites, and preventing mold. Furthermore, nano oxidation aldehyde-eliminating liquid is sprayed on or roller-painted on the surface, back face, groove and tongue of a product to further control the amount of released formaldehyde.

An object of the present invention is to provide an industrially suitable process for preparing an imidazolidin-2,4-dione compound which is safe, simple and easy to prepare the imidazolidin-2,4-dione compound with high yield, which is a useful compound, for example, as a material for decomposing a harmful halogenated aromatic hydrocarbon compound such as dioxin, etc., an electroless silver plating solution for electronic parts, or a diazo copying material, etc. This object can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises subjecting a 4,5-dihydroxy-2-imidazolidinone compound, (1) to dehydration reaction in the presence of an acid catalyst(s); or (2) to reaction at 100 to 300° C. Or, it can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises reacting a mixed solution of a urea compound, glyoxal, and a base at 20 to 300° C.Also, an object of the present invention is to provide a method for acquiring a 4,5-dihydroxy-2-imidazolidinone from an aqueous solution containing a 4,5-dihydroxy-2-imidazolidinone by a simple and easy method. This object can be solved by a process for acquiring a solid state 4,5-dihydroxy-2-imidazolidinone compound which comprises mixing an organic solvent with an aqueous solution containing a 4,5-dihydroxy-2-imidazolidinone compound, and subjecting the mixture to azeotropic distillation.

The invention relates to a polymeric intumescent flame retardant and a preparation method thereof and belongs to the technical field of phosphorus-containing flame retardants. The structural formula is as shown in the description. In the formula, the polymerization degree n is an integer of 5-200. The preparation method comprises the following steps: adding pentaerythritol and just distilled phosphorus oxychloride into a solvent A under inert gas shielding, mixing at a room temperature until the system is stabilized, slowly raising the temperature until no hydrogen chloride gas is released, washing, performing suction filtration, and drying to obtain an intermediate spironophosphoryl dichloride; adding 2-imidazolidinone into a solvent B, stirring until the solution is clarified and transparent, adding the intermediate spironophosphoryl dichloride, stirring until the system is uniformly mixed, reacting at a temperature of 50 DEG C for 2 hours, adding an acid-binding agent, washing afterreaction completion, performing suction filtration, and drying, thereby obtaining the polymeric intumescent flame retardant. The polymeric intumescent flame retardant provided by the invention is high in molecular weight, narrow in molecular weight distribution and excellent in compatibility with the matrix, and has excellent heat stability and high flame-retardant efficiency.

A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture which contains 1,3-dioxolane and preferably 1,3-dimethyl-2-imidazolidinone. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.