18 results about "Xylidine" patented technology

The invention relates to the technical field of chemistry and chemical engineering technologies, in particular to a steam turbine speed regulating system oil sludge cleaning agent and a preparation method thereof. Comprising phosphate base oil, a surfactant, a dispersing agent and a clearing agent, wherein the phosphate base oil comprises one or three of trimethyl phosphate, di-tert-butyl-phenyl phosphate and tri (xylene) phosphate; the oil sludge cleaning agent can efficiently and rapidly remove oil sludge attached to the speed regulating system, has good compatibility with a sealing material used in the speed regulating system, and solves the problems that cleaning is not thorough, the cost is high, the environment is polluted when operating oil is used, and a conventional cleaning agent cannot be used.

The present invention provides microcapsules comprising a hydrophobic core within a polymeric shell, wherein: a) the polymeric shell is formed from shell components comprising: i) 50% to 85% by weight, on the basis of the total weight of shell components in the microcapsules, of a polyisocyanate, wherein the polyisocyanate is an oligomer of xylylene diisocyanate and wherein the polyisocyanate comprises at least 4 isocyanate groups; ii) an alkyl silicate; iii) a polyethyleneimine; and iv) optionally, other shell components; and b) the core comprises a fragrance material. The invention further provides home or personal care formulations comprising the microcapsules and a process of producing the microcapsules.

The present invention is a polyamide-based resin foamed particle in which a mixed resin of a polyamide-based resin A, which is an aliphatic polyamide, and a polyamide-based resin B, which is a xylylene group-containing polyamide resin, is used as a base resin, the mass ratio of the polyamide-based resin A to the polyamide-based resin B (polyamide-based resin A: polyamide-based resin B) is 97: 3 to 60: 40.

A process for producing a water-emulsifiable polyisocyanate formulation, in which, in a first process step,(A) a dispersion-active reaction product (E) is prepared from at least one diisocyanate selected from the group of hexamethylene 1,6-diisocyanate, pentamethylene 1,5-diisocyanate, 4,4′-di(isocyanatocyclohexyl)methane, 1-isocyanato-3,3,5-trimethyl-5-(isocyanatomethyl)cyclohexane, tolylene 2,4- and 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylylene diisocyanate, 2,4′- and 4,4′-diisocyanatodiphenylmethane, with at least one mono- or polyhydric polyalkylene ether alcohol having 2 to 4 carbon atoms in the alkylene groups that comprises a polymer chain having at least 8 ethylene oxide units, and the resultant reaction product (E), in a second process step,(B) is mixed with at least one (cyclo)aliphatic polyisocyanate having an average NCO functionality of 2.2 to 5.0, preferably of 2.5 to 4.0,wherein step (B) is performed in the presence of an allophanatization catalyst and the conditions are chosen such that (E) and the polyisocyanate form allophanate groups, characterized in that the allophanatization catalyst is at least one salt consisting of a metal cation and at least one dithiophosphate anion.

The invention provides a preparation method of a triazine ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2-hydroxy-4-n-octyloxophenyl)-1, 3, 5-triazine, the preparation method comprises the following steps: 2-(2, 4-dihydroxyphenyl)-4, 6-bis (2, 4-dimethylphenyl)-S-triazine and 1-chloro-n-octane are used as raw materials for reaction preparation, before the reaction is carried out, the 2, 4-dihydroxyphenyl)-4, 6-bis (2, 4-dimethylphenyl)-S-triazine and 1-chloro-n-octane are added into the reaction kettle, and the reaction kettle is used for reaction to prepare the triazine ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2, 4 the reaction system is desolventized in advance, and the moisture content is controlled to be 500 ppm or below; according to the preparation method disclosed by the invention, the moisture in the system is firstly removed by desolventizing in advance, so that the yield of the ultraviolet light absorber 2, 4-bis (2, 4-dimethylphenyl)-6-(2-hydroxy-4-n-octyl oxo phenyl)-1, 3, 5-triazine is effectively improved.

The invention discloses an ultra-long room temperature phosphorescent polyurethane elastomer material and a preparation method and application thereof, in the structural formula of the polyurethane elastomer material, A is selected from substituted or unsubstituted isophorone group, phenyl group, biphenyl group, diphenylmethane group, dicyclohexylmethane group, xylyl group, naphthyl group, cyclohexyl group and C3-C6 alkyl group; b is polyether polyol; p is a phosphorescent group. X is a positive integer of 0-60, y is a positive integer of 1-4, and z is a positive integer of 10-80. According to the invention, the polyurethane material with room-temperature phosphorescence is obtained by covalently connecting the dihydroxyl-functionalized phosphorescent molecules into the polyurethane material, the afterglow color change is realized by changing the structure of the phosphorescent molecules, and the material also shows excellent mechanical properties and resistance to wet and hot environments, and has good application prospects. Therefore, the material has a wide application prospect in the material fields of flexible luminescent devices, information encryption, advanced anti-counterfeiting and the like. # imgabs0 #

The invention discloses a method for detecting optical isomers of tert-butyl-(S)-[2-(2-cyano-4,4-difluoropyrrolidine-1-yl)-2-oxyethyl] carbamate, and adopts a high-performance liquid chromatography determination method. The determination method comprises the following steps: using a chromatographic column with amylose-tris(3,5-diphenylcarbamate) as a filler, using n-hexane-ethanol-trifluoroacetic acid with a volume ratio of 700-750:250-300:1 as a mobile phase, preparing a solution for injection, and calculating the optical isomer content by a peak area normalization method. The invention makes up for the current technical gap of lacking high-performance liquid chromatography detection of the substance.

The invention provides halogen-free flame-retardant polyurethane resin as well as a preparation method and application thereof, and the halogen-free flame-retardant polyurethane resin is prepared from the following raw materials in percentage by weight: 60-85% of a polyurethane matrix material system; 10 to 35% of phenyl phosphine oxide; 3-10% of a flame retardant synergist; wherein the phenyl phosphine oxide is selected from at least one of triphenyl phosphine oxide or p-xylyl bis (diphenyl) phosphinic oxide; the flame retardant synergist is selected from salts formed by nitrilotrimethylene triphosphonic acid and metal ions; the polyurethane leather prepared from the halogen-free flame-retardant anti-polyurethane resin disclosed by the invention is good in flame retardant property, good in hydrolysis resistance and good in mechanical property.

The invention discloses a polyurethane elastomer material with multi-stimulus response discoloration, high mechanical strength and self-healing characteristics as well as a preparation method and application thereof, in the structural formula of the polyurethane elastomer material, A is selected from substituted or unsubstituted phenyl, biphenyl, xylyl, naphthyl, cyclohexyl, butyl and hexyl, and B is selected from substituted or unsubstituted phenyl, biphenyl, xylyl, naphthyl, cyclohexyl, butyl and hexyl; the substituent groups are alkyl groups, alkoxy groups and halogen methyl groups of C4-C6; and B is polyether polyol. W is a positive integer ranging from 10 to 80, x is a positive integer ranging from 4 to 8, y is a positive integer ranging from 20 to 70, and z is a positive integer ranging from 20 to 90. According to the invention, adipic acid dihydrazide, 2, 2-bis (hydroxymethyl) propionic acid and rhodamine 6G ethylene glycol are used as chain extenders, and organic tin is used for catalytic polymerization to form the organic tin-based polymer. The material disclosed by the invention has the characteristic of color change response to external stress, ultraviolet irradiation and an acid environment, can be subjected to shape programming after being heated, and also has excellent mechanical strength and self-healing performance.

The invention discloses an ultrasonic coupling bag, an ultrasonic coupling agent and a preparation method of the ultrasonic coupling agent. The ultrasonic coupling agent comprises a first component and a second component, wherein the first component is prepared from the following raw materials in parts by weight: 90 to 110 parts of phenyl xylene ethane; 0.8 to 1.2 parts of 2, 5-diphenyl oxazole; 7 to 12 parts of polymethyl methacrylate; 90 to 110 parts of dichloromethane; 2 to 3 parts of Span; 90 to 110 parts of deionized water; the second component is prepared from poloxamer F188 and deionized water; wherein the mass ratio of the first component to the poloxamer F188 to the deionized water is (2 to 3) to 1 to (4 to 6).

Polyamide-based resin expanded beads having a mixed resin of a polyamide-based resin A and a polyamide-based resin B as a base resin, in which the polyamide-based resin A is an aliphatic polyamide, the polyamide-based resin B is a xylylene group-containing polyamide-based resin, and a mass ratio between the polyamide-based resin A and the polyamide-based resin B (polyamide-based resin A:polyamide-based resin B) is 97:3 to 60:40.

The present invention aims to provide a compound having excellent solvent solubility and excellent heat resistance, thermal decomposition stability, thermal conductivity, and flame retardancy, and a curable resin composition containing the compound. A multifunctional vinyl resin represented by the following general formula (1A) or an epoxy resin represented by the following general formula (1B) is provided. In formula (1), R 1 ~R 6 each independently represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, X independently represents a structure represented by formula (2), a benzonitrile structure, a diphenylsulfonyl structure, a xylylene structure, or - (CH2) m -, m represents a number of 3 to 10, and n represents a number of 1 to 15. (1A) (1B) (2).

This invention relates to a novel method for preparing cresol from xylyl ether.

The invention provides a method for detecting the R-isomer of mitiglinide calcium in mitiglinide calcium or its preparation. The method comprises the following steps: preparing a test solution: taking mitiglinide calcium or its preparation to prepare a test solution; chromatographic conditions: using a chromatographic column with cellulose tris(4-xylylcarboxylate) coated on a silica gel surface as a filler, and using n-hexane-anhydrous ethanol-trifluoroacetic acid as a mobile phase; and a determination method: taking the test solution and injecting it into a liquid chromatograph for determination.

The present invention belongs to the field of chemical analysis technology, and in particular to a method for separating rivaroxaban intermediates and their impurities and detecting the content of each component. The method is: a chromatographic column uses a silica gel coated with amylose tris (3,5-diphenylyl carbamate) on the surface as a filler, and a mixed solution of n-hexane and isopropanol is used as a mobile phase for elution, and (S)-(+)-N-(2,3-propylene oxide) phthalimide and its optical isomers, synthetic raw material impurities and hydrolysis impurities are separated; in the mobile phase, the volume ratio of n-hexane and isopropanol is 95-85: 5-15. The self-built high-performance liquid chromatography of the present invention can realize the simultaneous separation and content detection of four components within 30 minutes or more than 30 minutes, and the separation degree between each impurity can meet the requirements. This method is highly sensitive and is not interfered by other impurities and test samples; it is simple, fast, sensitive and effective.

The present invention relates to a novel process for preparing cresol from ditolylether.

The invention relates to a (2, 4, 6-trimethylbenzoyl) (3, 4-xylene) phenyl phosphine oxide photoinitiator and a preparation method and application thereof, and the preparation method comprises the following steps: preparing (3, 4-xylene) phenyl phosphine chloride, preparing (3, 4-xylene) phenyl phosphine oxide, and preparing (2, 4, 6-trimethylbenzoyl) (3, 4-xylene) phenyl phosphine oxide. Compared with the prior art, the preparation method disclosed by the invention is a brand new photoinitiator compound, the product purity is up to 99%, the wastewater generation amount in the production process is greatly reduced, the performance test of the substance is superior to the product performance of the same series of acylphosphine oxide photoinitiators, and the raw materials required by the process are all bulk chemical raw materials, are stable in source, and are suitable for industrial production. The maximum absorption strength of XTPO is superior to that of the main product TPO at present, the curing efficiency of the initiator is higher, and the coloring stability is better.

The present invention belongs to the technical field of antioxidant detection and analysis, and specifically relates to a detection method for 5,7-di-tert-butyl-3-(3,4-xylyl)benzofuran-2(3H)-one. The present invention establishes a method for rapid determination of 5,7-di-tert-butyl-3-(3,4-xylyl)benzofuran-2(3H)-one by gas chromatography-mass spectrometry, and the target compound determined by this method shows a good linear relationship within a certain range; the detection limit and quantitative limit are both low, and the sensitivity is high; the relative standard deviation and the spiked recovery rate meet the test requirements, and the precision and accuracy are high; and the method is simple and efficient to operate, and can provide technical and data support for the safe use of plastic packaging materials and the quality control of products by manufacturers.