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108 results about "Crotonates" patented technology
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Derivatives of BUTYRIC ACID that include a double bond between carbon 2 and 3 of the aliphatic structure. Included under this heading are a broad variety of acid forms, salts, esters, and amides that include the aminobutryrate structure.
Method for preparing butyrate clevidipine
Owner:SUN YAT SEN UNIV +1
Novel method for preparing important intermediate of minodronate
The invention relates to a method for preparing 2-(imidazo[1,2-a]pyridine-2-pyridinyl) acetic acid of a compound in a formula (I). In the method, trans-4-oxo-2-crotonate and 2-aminopyridine in a compound of a formula (II) perform a condensation reaction, and are hydrolyzed to form the compound of the formula (I). The compound is an important intermediate for preparing the minodronate.
Owner:北京京卫信康医药科技发展有限公司
Synthesis process of barnidipine hydrochloride
ActiveCN101643469AEasy to separateEasy to purifyOrganic chemistryCardiovascular disorderPyrroleCrotonates
The invention relates to a synthesis process of barnidipine hydrochloride. The synthesis process comprises the following steps: (1) reacting 3-hydroxypropionitrile (I) with ketene dimer (II) to obtaina compound (VI); (2) reacting the compound (VI) with m-nitrobenzaldehyde (III) to obtain a compound (VII); (3)reacting the compound (VII) with beta-amion ethyl crotonate (IV) to obtain a compound (VIII); (4) hydrolyzing the compound (VIII) by an alkali to obtain a compound (IX); (5) resolving the compound (IX) with a chiral organic base to obtain a compound (X); (6) carrying out a reaction between the compound (X) and benzyl pyrrole alcohol to obtain a compound (XI); and (7) adding the compound (XI) in a chlorine hydride solution to obtain barnidipine hydrochloride (XII). The synthesis process has the following advantages: (1) mild reaction conditions, easily separated and purified products obtained in every step, which has controllable quality, (2) higher yield in each step, easily obtainable raw and auxiliary materials, low total cost, (3) no column chromatography and industrialized production suitability.
Owner:WUHAN BIOCAUSE PHARMA DEV
Functionalized hydrophilic macromonomers and medical devices incorporating same
A macromonomer of the present invention comprises at least functional group and a plurality of hydrophilic moieties. Such a functional group can be an ethylenically unsaturated group that comprises acrylate, methacrylate, sinapate (or 3,5-dimethoxy-4-hydroxycinnamate), cinnamate (or 3-phenylacrylate), senecioate (or 3,3-dimethylacrylate), crotonate, maleate, fumarate, itaconate, vinyl, allyl, or styryl group. Polymeric materials comprise such a macromonomer are used advantageously to provide a hydrophilic or lubricious (or both) coating on polymeric articles, such as medical devices. Such polymeric materials can comprise units of other hydrophilic monomers.
Owner:BAUSCH & LOMB INC
Method for preparing optically pure 3-amino butyl alcohol
ActiveCN101417954ASuitable for industrial productionStereoselectiveOrganic compound preparationAsymmetric synthesesAcetoacetatesPotassium borohydride
The invention discloses a method for preparing optical pure 3-aminobutanol, which comprises the following steps: acetylacetic ester and chiral phenethylamine react to generate 3-(1'-benzylmethylamine)-2-crotonate enantiomer, namely 3-(1'-benzylmethylamine)-2-crotonate; potassium borohydride triacetate or sodium borohydride triacetate is used to reduce the 3-(1'-benzylmethylamine)-2-crotonate enantiomer into a 3-(1'-benzylmethylamine)-2-butyric ester enantiomer; then chiral pure 3-(1'-benzylmethylamine)-2-butyric ester is obtained through salification and resolution; and the 3-(1'-benzylmethylamine)-2-butyric ester is subject to reducing debenzylation by palladium-carbon to obtain the optical pure 3-aminobutanol. The method has low cost and high product purity, and is suitable for industrialized production.
Owner:ABA CHEM SHANGHAI +1
Ethyl 3-mercaptobutyrate as a perfuming agent and methods for preparing and using same
Owner:BUSH BOAKE ALLEN LTD
Weed removal combination
The invention discloses a herbicide composition, containing A, B, two active ingredient, and right amount agriculturally acceptable surfactant and solid or liquid diluent. Active ingredient A is selected from 3-methyl-2-[5-(2-chlor-4- trifluoromethylphenoxy)-2-nitrylbenzoxy]-3-ethyl crotonate, active ingredient B is selected from any of the following herbicide: sethoxydim, Clethodim, quizalofop-P-ethyl, Haloxyfop-R, fluazifop-P-butyl, fenoxaprop-ethyl, cyhalofop-hutyl, quizalofop-P-tefuryl. Weight portions ratio of A and B is 1:80 to 80:1. Herbicidal compositions can be processed to missible oil, suspending agent (emulsion), aqueous emulsion, microemulsion, water dispersed granule, wettable powder, it can effectively prevent and kill multiple weeds of soybean field.
Owner:SHENYANG RES INST OF CHEM IND
Radiation-resistant and flame-retardant nuclear power station cable insulating material and preparation method thereof
InactiveCN104672629AEvenly dispersedImprove radiation resistanceRubber insulatorsNuclear powerRare earth
The invention discloses a radiation-resistant and flame-retardant nuclear power station cable insulating material. The radiation-resistant and flame-retardant nuclear power station cable insulating material comprises the following raw materials in parts by weight: 90-100 parts of an ethylene-propylene-diene monomer, 30-40 parts of neoprene, 50-60 parts of ABS resin, 20-30 parts of an ethylene-tetrafluoroethylene copolymer, 15-25 parts of barium sulfate, 10-15 parts of lead oxide, 20-25 parts of rare earth oxide, 10-20 parts of silicon nitride, 20-25 parts of nanotalcum powder, 15-25 parts of hard pottery clay, 20-30 parts of nanomagnesium hydroxide, 1-1.5 parts of a zircoaluminate coupling agent TL-5, 4-8 parts of 1, 1, 3, 3-tetramethylbutyl hydroperoxide, 0.5-1.1 parts of sulphur powder, 0.8-1.2 parts of an assistant crosslinking agent TAIC, 0.4-0.8 part of an assistant crosslinking agent HVA-2, 2-4 parts of sodium crotonate, 4-6 parts of magnesium oxide, 2-5 parts of triphenyl phosphate, 3-6 parts of zinc stearate and 3-4 parts of an antiager. The invention further discloses a preparation method of the radiation-resistant and flame-retardant nuclear power station cable insulating material.
Owner:ANHUI SPECIAL CABLE GRP
Fluorinated elastic copolymer, process for producing same, and crosslinked rubber
To provide a fluorinated elastic copolymer having a high crosslinkability and flowability and excellent in the compression set and the resistance to bases, and a process for its production, and a crosslinked rubber.A fluorinated elastic copolymer having repeating units (A) based on at least one monomer (a) selected from the group consisting of tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride, chlorotrifluoroethylene and a perfluoro(alkyl vinyl ether), repeating units (B) based on at least one monomer (b) selected from the group consisting of vinyl crotonate, divinyl adipate and 1,4-butanediol divinyl ether and, as the case requires, repeating units (C) based on at least one monomer (c) selected from ethylene or propylene, and having iodine atoms, and a crosslinked rubber obtained by crosslinking the fluorinated elastic copolymer by an organic peroxide.
Owner:ASAHI GLASS CO LTD
Synthetic method of sitagliptin and salt thereof
The invention discloses a synthetic method of sitagliptin and a salt thereof. The synthetic method comprises the steps: carrying out an esterification reaction, a reduction reaction, an oxidizing reaction and a witting reaction on 2,4,5-trifluorophenylacetic acid as a starting raw material to obtain 4-(2,4,5-trifluorophenyl)-2-ethyl crotonate; then carrying out a hydroamination reaction on 4-(2,4,5-trifluorophenyl)-2-ethyl crotonate and chiral amine in the presence of butyl lithium or hexamethyldisilazane sodium to form a chiral hydroamination product; carrying out an esterolysis reaction, a condensation reaction and a hydrogenation reaction to obtain sitagliptin. The raw materials used in the synthetic method of sitagliptin are low in price and easy to obtain; the synthetic method of sitagliptin is less in step, easy to operate and capable of effectively reducing cost. By the use of the method, high-purity sitagliptin can be obtained, a sitgliptin phosphate obtained through salifying has an HPLC (High Performance Liquid Chromatography) and an ee (enantiomeric excess) value of more than 99% and can be applied to the field of medicine.
Owner:ZHEJIANG NHU CO LTD +1
Debondable adhesives and the high temperature use thereof
InactiveUS20180355231A1Not compromise handling and performanceEasy to cleanLamination ancillary operationsNon-macromolecular adhesive additivesVinyl etherMethacrylate
Provided herein are debondable adhesive compositions comprising (A) one or more bis-maleimide (BMI), nadimide or itaconimide oligomer(s), (B) at least one ethylenically unsaturated co-monomer (e.g. co-monomers selected from the group consisting of acrylates, methacrylates, vinyl ethers, vinyl esters, styrenic compounds, allyl compounds, polybutadienes, cinnamates, crotonates, and mixtures of any two or more thereof), and (C) a photoinitiator. In another embodiment, the present invention is directed to an assembly of a substrate and a carrier for the substrate in which the debondable adhesive composition temporarily bonds the substrates, and a method for fabricating the assembly. The debondable adhesive compositions maintain their adhesion at temperatures of 300° C. or greater, are easily and cleanly debondable at ambient conditions, permit temporary bonding at high processing conditions, and do not compromise handling or performance of the substrates.
Owner:HENKEL IP & HOLDING GMBH
Hair styling composition in the form of a microemulsion
The compositions of the present invention relate to improved hair styling compositions in the form of microemulsions which are non-fluid and clear or transparent and which are comprising 20% to 60% by weight water; at least 3% by weight of an oil phase comprising liquid hydrophobic oils, at least 20% by weight of emulsifier; anionic hair fixing polymers and / or nonionic hair fixing polymers. Preferred polymers are anionic vinylacetate / crotonates copolymer and nonionic vinylpyrrolidone homopolymer.
Owner:THE PROCTER & GAMBLE COMPANY
Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound
InactiveCN102344463AFew reaction stepsReduce difficultyGroup 5/15 element organic compoundsCombinatorial chemistryPyridine
The invention discloses a method for preparing a 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1,1-bisphosphonic acid compound with high purity, which comprises the following steps of: obtaining a compound as shown in a formula (III) through nucleophilic addition of a compound (trans-4-oxygroup-2-ethyl crotonate) as shown in a formula (II) and 2-aminopyridine; hydrolyzing the compound as shown in the formula (III) under alkali condition to obtain a compound as shown in a formula (IV); and phosphorylating the compound as shown in the formula (IV) by adopting toluene as a solvent to obtain a compound as shown in a formula (I). The synthetic process condition of the product is moderate, the aftertreatment is simple, the purity is high, the reaction cost is low, and the profit is high. The industrialized production can be realized easily.
![Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound](https://images-eureka.patsnap.com/patent_img/accdd967-c371-4f38-b159-a4c95fd749fb/FSA00000592507100011.png "Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound")
![Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound](https://images-eureka.patsnap.com/patent_img/accdd967-c371-4f38-b159-a4c95fd749fb/FSA00000592507100012.png "Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound")
![Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound](https://images-eureka.patsnap.com/patent_img/accdd967-c371-4f38-b159-a4c95fd749fb/FSA00000592507100013.png "Method for preparing 1-hydroxy-2-(imidazo [1, 2-a] pyridine-3-radical) ethylidene-1, 1-bisphosphonic acid compound")
Owner:NANJING CORE TECH CO LTD
4-halogenated-2-methyl-2-ethyl crotonate preparing method
ActiveCN104513164ASimple processRaw materials are easy to getOrganic compound preparationCarboxylic acid esters preparationGrignard reagent2-Methyl-2-butene
The invention discloses a 4-halogenated-2-methyl-2-ethyl crotonate preparing method which includes following steps: (1) performing a Grignard reaction to ethyl pyruvate (II) and a vinyl magnesium halide Grignard reagent (III) to obtain a condensation compound (IV) after the reaction finished, and carrying out a hydrolysis reaction to the condensation compound (IV) to obtain a hydroxyl compound (V); and (2) performing a halogenating reaction to the hydroxyl compound and a haloid acid to obtain the 4-halogenated-2-methyl-2-ethyl crotonate (I). The 4-halogenated-2-methyl-2-ethyl crotonate preparing method is simple in total technology, allows raw materials to be obtained easily, is good in reaction selectivity, is less in by-products and is high in yield. The employed raw materials are all low-toxic or toxic-free and are all corrosiveness-free so that the method is not rigorous in requirement of devices, is environmental-friendly and is suitable for industrialized production.
Owner:SHANGYU NHU BIOCHEM IND +2
Preparation method of optically pure 3-amino-1-butanol
ActiveCN104961640AHigh yieldPromote environmental protectionOrganic compound preparationAmino-hyroxy compound preparationAcetoacetatesDiphosphines
The invention provides a method for preparing optically pure 3-amino-1-butanol. The method comprises the following steps: reacting benzamide and acetoacetate under the catalytic action of p-toluenesulfonic acid to generate 3-benzamido-2-crotonate; carrying out catalytic hydrogenation reaction by using a chiral rhodium-diphosphine ligand compound as an asymmetric hydrogenation catalyst to generate 3(R) / (S)-benzamidobutyrate at high selectivity; reducing ester carbonyl group with hydroborate to generate 3(R) / (S)-benzamido-1-butanol; and finally, carrying out hydrolysis and benzoyl removal with concentrated hydrochloric acid to obtain the optically pure 3(R) / (S)-amino-1-butanol. The method has the advantages of cheap and accessible raw materials, simple technical operation, no need of resolution, high yield, low cost, environment friendliness and high optical purity of the product, and is more suitable for industrial production.
Owner:浙江宏康医药化工股份有限公司
Processes of manufacturing substituted-1,4-dihydropyridines, improved aqueous solutions thereof, and processes of manufacturing the solutions
A process of preparing a stable parenteral solution of a 1,4-dihydropyridine salt, such as nicardipine hydrochloride, in an acidic aqueous medium. The presence of L-arginine in the solution enhances the solubility of the salt, which is poorly soluble in water.An aqueous, injectable isotonic solution at pH about 3.5-3.6 consists essentially of nicardipine hydrochloride, L-arginine, and a sugar alcohol.An improved single pot manufacturing process for obtaining unsymmetrical 1,4-dihydropyridines by using more than one mole equivalent of aldehyde with respect to the other reactants (amino crotonate and acetoacetate ester). The reaction can be conducted in a solvent present at 20 times the amount of any one component.A process for changing one polymorph of nicardipine hydrochloride (Form A) into another (Form B), and a separate process for the reverse (Form B into Form A).
Owner:NAVINTA
Method for synthesizing crocin glucoside
InactiveCN101514216AHigh yieldHigh purityEsterified saccharide compoundsSugar derivativesCrocinHydrolysis
The invention provides a method for synthesizing crocin glucoside, which comprises the following steps: a, synthesizing a C10 compound, namely 2,7-dimethyl-2,4,6-octatriene-1,8-dial (compound II); b, synthesizing a C5 compound, namely E-2-methyl-4-bromo-2- methyl crotonate; c, synthesizing crocetin dimethyl ester by taking the two compounds as raw materials; d, performing hydrolysis reaction on the crocetin dimethyl ester to obtain crocetin; and e, reacting the crocetin and 1,1'-carbonylbis-1h-imidazo to synthesize crocetin imidazole and further synthesize the crocin glucoside. The synthesizing process has the advantages in aspects of operation simplification and yield, and has high synthetic impurity, high yield, cost saving and strong industrial applicability.
Owner:SICHUAN UNIV
Preparation method of afatinib and maleate thereof
The invention belongs to the technical field of synthesis of compounds, and relates to a preparation method of afatinib and maleate thereof. The preparation method comprises the following steps: in the presence of a first organic solvent, adopting N-4-[(3-chloro-4-fluorophenyl)]-7-{[(3S)-tetrahydrofuran-3-group]oxo}-4,6-quinazoline diamine as a raw material to have the acylation reaction with (E)-4-dimethyl amino crotonate hydrochloride to obtain an acylation reaction solution under the effect of thionyl chloride, water and alkaline water are added into the acylation reaction solution, the water phase is extracted by virtue of butyl acetate, an organic phase is collected, after the organic phase is washed, the organic phase is directly stirred and precipitated to obtain an afatinib crude product, then the afatinib crude product is refined to obtain a competitive product, and the competitive product reacts with maleic acid to obtain maleic acid afatinib. The method has the characteristics of being high in product yield, high in purity, low in impurity content, mild in reaction conditions, simple in operation, suitable for industrialized production and the like.
Owner:NORTHEAST PHARMA GRP
Cys fluorescence sensor based on rhodamine B, preparing method and application
InactiveCN106220650AGood light stabilityLow costOrganic chemistryColor/spectral properties measurementsIsobenzofuranTwo step
The invention discloses a Cys fluorescence sensor based on rhodamine B, a preparing method and an application. The preparing method includes the steps that the rhodamine B serves as a precursor, and a target product 3'-hydroxyl-3-carbonyl-3H-spiro[isobenzofuran-1,9'-xanthene]-6'-yl(E)-4-((2-(3',6'-di(diethylamide-3-carbonyl-spiro[isoindolinyl-1,9'-xanthene])-2-yl)ethyl)amino)-4-carbonyl butanol-2-crotonate is synthesized with two steps. According to the Cys fluorescence sensor, the preparing method and the application, Cys is detected through the target product, and it is found that the target product has a quite good detection effect on Cys; meanwhile, the raw materials are easy to get, the synthesis steps are simple, postprocessing is also quite convenient, and large-scale production can be easily achieved.
Owner:NANJING UNIV OF SCI & TECH
Preparation method of 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydro-5-methoxy-carbonyl-3-pyridinecarboxylic acid
The invention provides a novel preparation method of 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydro-5-methoxy-carbonyl-3-pyridinecarboxylic acid (I). According to the method, vinyl acetate-beta propyl ester and tert-butyl alcohol are adopted as raw materials and are subjected to a reaction; after the reaction, no treatment is carried out, and 2,3-dichlorobenzene formaldehyde and 3-amino-2-methyl crotonate are added; a condensation and cyclization reaction is carried out with a one-pot reaction method, such that 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydro-3,5-pyridine tert-butyl methyl dicarboxylic ester (II) is produced. Under an acidic condition, tert-butyl group of II is selectively removed, such that the product 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydro-5-methoxy-carbonyl-3-pyridinecarboxylic acid (I) is obtained. The method has the advantage that the product 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydro-5-methoxy-carbonyl-3-pyridinecarboxylic acid (I) can be produced with high yield and high purity. The raw materials are easy to obtain. Reaction post-treatment and product purification are simple.
Owner:上海复奇医药科技有限公司
Preparation method of 2 (2-ethoxy-2-oxoethyl)-8-methyl-5, 6-dihydroimidazo pyrazine carboxylic acid tert-butyl ester
ActiveCN107312007AReasonable reaction process designOriginalityOrganic chemistryPyrazineCarboxylic acid
The invention relates to a synthesizing method of 2 (2-ethoxy-2-oxoethyl)-8-methyl-5, 6-dihydroimidazo [1, 2-a] pyrazine-7 (8H)-carboxylic acid tert-butyl ester, and aims at solving the technical problem that a proper industrial synthesizing method is not provided currently. The method comprises the following four steps: 1, reacting a compound 1 and ammonium hydroxide in a high-pressure kettle to obtain a compound 2; 2, reacting the compound 2 and 4-epoxide-2-ethyl crotonate through acetonitrile to obtain a compound 3; 3, hydrogenating the compound 3 through a catalyst which is palladium / carbon in methanol to obtain a compound 4; and 4, adding Boc anhydride and potassium carbonate to the compound 4 in ethyl alcohol; and reacting overnight at room temperature to obtain a final compound 5.
Owner:SHANGHAI SYNTHEALL PHARM CO LTD +4
Preparation method of nitrendipine
The invention belongs to the field of drug synthesis, and particularly relates to a preparation method of nitrendipine. The preparation method is characterized by including following steps: (1), allowing 3-nitrobenzylidene ethyl acetoacetate intermediate and 3-aminomethyl crotonate according to a molar ratio of 1:1-1.1 to react at 70-75 DEG C in advance; (2), adding concentrated hydrochloric acidinto a reaction system of the step (1), and allowing reaction at 70-75 DEG C after adding is completed, wherein adding amount of the concentrated hydrochloric acid is 10-15% of molar weight of the 3-nitrobenzylidene ethyl acetoacetate intermediate; (3), cooling to 15-20 DEG C after reaction in the step (2) is completed, continuing reaction, and performing solid-liquid separation and recrystallization to obtain nitrendipine. Through process control, content of ester exchange impurities can be lowered effectively, and product yield can be increased.
Owner:HARVEST PHARMA HUNAN CO LTD
Mold-proof and damp-proof agent with drying function
InactiveCN107998846AEffective absorptionVersatileAntifouling/underwater paintsSpecial paperSulfateSilicon dioxide
The invention provides a mold-proof and damp-proof agent with a drying function. The mold-proof and damp-proof agent is prepared from 10-13 parts of sulfate, 10-13 parts of crotonate, 6-8 parts of bamboo leaf powder, 2-5 parts of aluminum oxide, 3-5 parts of sodium chloride, 1-4 parts of silicon dioxide and 15-25 parts of citric acid. The mold-proof and damp-proof agent is comprehensive in function and applicable to mold prevention of food, furniture, wall paint and wall paper, has a good effect and is long in lasting time and low in cost; by means of an efficient and comprehensive mold prevention technology, moisture in humid air is effectively absorbed, mold is prevented, dreary air brought by moldy taste is completely taken away, and breathability and moisture prevention are achieved.
Owner:钱小平
Method for preparing optically pure 3-amino butyl alcohol
ActiveCN101417954BStereoselectiveHigh optical purityOrganic compound preparationAsymmetric synthesesAcetoacetatesPotassium borohydride
Owner:雅本(绍兴)药业有限公司
Synthetic process of herbicide
The invention relates to a synthetic process of a herbicide, belongs to the field of fine chemistry industry, and particularly relates to a synthetic process of herbicide. The invention provides a synthetic process of herbicide, and the process has the advantages of less consumed time and high productive rate and purity. The synthetic process comprises the following processing steps: the synthesis of sec-butyl urea, the synthesis of 3-(3-sec-butyl) urea2-2-methyl crotonate, and the synthesis of 3-sec-butyl-6-methyl uracil.
Owner:章婉盈
Air purification material capable of releasing anions as well as preparation method and application of air purification material
ActiveCN106824057ALarger surface areaImprove adsorption capacityGas treatmentOther chemical processesDiseaseTreatment effect
The invention discloses an air purification material capable of releasing anions as well as a preparation method and application of the air purification material. The air purification material contains the following raw materials in parts by weight: 28-36 parts of akadama, 1-5 parts of ethyl crotonate, 11-19 parts of gypsum vitreum, 5-12 parts of butanediol and 3-7 parts of potassium tartrate. The preparation method comprises the following steps: crushing the akadama, mixing the akadama with an ethyl crotonate solution and butanediol, and carrying out sealed heating and stirring, so as to obtain a mixture A; crushing the gypsum vitreum, mixing the gypsum vitreum with a potassium tartrate solution, and carrying out sealed heating and stirring, so as to obtain a mixture B; and mixing the two mixtures, carrying out ultrasonic treatment, drying, and calcining at 500 DEG C, so as to obtain the air purification material. The air purification material prepared by virtue of the preparation method is capable of removing peculiar smell and eliminating formaldehyde, ammonia, benzene, xylene and the like, the treatment effect is remarkable, and the treatment time is short. The air purification material further has a function of releasing the anions, is capable of purifying the environment, further has the effects of preventing and treating diseases, caring health, opening mind and the like, is suitable for all peculiar smells of various occasions and is applicable to industrial production and large-scale use.
Owner:玛雅森林(北京)国际科技有限公司
Method for detecting meptyldinocap residue amount in tobaccos
ActiveCN107422054AHigh sensitivityEasy to handleComponent separationPesticide residueRelative standard deviation
The invention discloses a method for detecting meptyldinocap residue amount in tobaccos. The meptyldinocap residue amount in the tobaccos is detected by detecting a corresponding hydrolysis product (2,4-dinitro-6-(1-methylheptyl) phenol, 2,4-DNOP) of meptyldinocap (2,4-dinitro-6-(1-methylheptyl) phenyl crotonate, 2,4-DNOPC). Tobacco samples are extracted by an improved method, sample introduction analysis is performed after heating ultrasonic hydrolysis under an alkaline condition, detection is performed by an ultra-high performance liquid chromatography-tandem mass spectrum negative ion multi-reaction monitoring mode, quantification is performed by an external standard method, results show that the linear relationship of the meptyldinocap is good within the range of 0.001-0.5mg / L, a correlation coefficient (r2) is larger than 0.999, detection limit is 3 micrograms / kg, the recovery rate of the 2,4-DNOPC is 92.37%-100.52%, and relative standard deviation (RSD) is 2.43%-3.30%. According to the method, sample pretreatment is simple and rapid, analysis time is short, sensitivity, accuracy and precision meet pesticide residue detection requirements, and the method is applicable to detection of the meptyldinocap residue amount in the tobaccos.
Owner:YUNNAN ACAD OF TOBACCO AGRI SCI
Heatproof antifreezing modified adhesive for cement reinforcer and preparation method thereof
InactiveCN107541172AImprove frost resistanceWell mixedMonocarboxylic acid ester polymer adhesivesNon-macromolecular adhesive additivesSodium bicarbonateAluminium chloride
The invention discloses a heatproof antifreezing modified adhesive for a cement reinforcer. Raw materials of the adhesive comprise polyurethane, vinyl acetate, formaldehyde, urea, methenamine, hydrochloric acid, phosphoric acid, disodium ethylene diamine tetraacetate, polyxyethylated alkylphenol, aluminium nitrate, aluminium chloride, sodium hydroxide, sodium bicarbonate, acrylic acid, 2-vinyl crotonate, polyacrylate, toluene diisocyanate, polyhydroxy fatty acid, dibutyl phthalate, N-methylolacrylamide, OP-10, silica sol, ammonium persulfate, octanol, glycol, A antifreezing reinforcing filler,A heatproof tackifier and deionized water. The invention also brings forward a preparation method of the above heatproof antifreezing modified adhesive for a cement reinforcer. The prepared modifiedadhesive is used for preparation of a cement reinforcer, and has excellent heatproof antifreezing properties.
Owner:ANHUI ANDA HUATAI NEW MATERIALS CO LTD
High-performance heat-insulating building glue composition
InactiveCN108659716AExtensive sources of raw materialsWide variety of sourcesNon-macromolecular adhesive additivesOrganic non-macromolecular adhesivePolyvinyl alcoholCalcium formate
The invention discloses a high-performance heat-insulating building glue composition. The high-performance heat-insulating building glue composition comprises the following raw materials in parts by weight: 1-4 parts of a glue reactant, 0.2-0.7 part of polyimide, 3-9 parts of polyurethane, 2-6 parts of ethyl acrylate, 0.2-0.7 part of trimethoxy silane, 0.4-1 part of polyisobutyl ester, 2-5 parts of fly ash, 3-8 parts of phenolic resin, 0.5-0.9 part of magnesium silicate, 0.4-0.7 part of sodium benzoate, 3-8 parts of methyl cellulose, 0.2-0.5 part of acetone, 0.6-1 part of butyl acetate, 0.4-0.9 part of ethyl crotonate, 5-10 parts of formaldehyde, 0.5-2 part of calcium formate, 3-7 parts of urea-formaldehyde resin, 1.2-1.7 parts of styrene, 0.3-0.9 part of sodium benzoate, 3-7 parts of an environment-friendly mildew preventive and 0.4-0.8 part of polyvinyl alcohol. The high-performance heat-insulating building glue composition has the advantages of wide raw material sources, low price,environment friendliness, zero pollution, very good adhesive effect, fast drying, stable quality and the like.
Owner:陆永
Waterproof modified adhesive for furniture finishing and preparation method thereof
InactiveCN107541164AImprove waterproof performanceWell mixedNon-macromolecular adhesive additivesGraft polymer adhesivesAdhesiveDimethyl siloxane
The invention discloses a waterproof modified adhesive for furniture finishing. Raw materials of the adhesive comprise polyurethane, ethylene vinyl acetate, 2-vinyl crotonate, polyvinyl alcohol, potassium persulphate, ammonium persulfate, nanometer titanium dioxide, nanometer silica, nanometer zinc oxide, nanometer calcium carbonate, alumina silicate, kaolin, asbestos powder, a silane coupling agent KH-560, calcium stearate, polydimethylsiloxane, polymethylphenylsiloxane, tristearin, sodium dodecyl benzene sulfonate, N-methyl-2-pyrrolidone, a modified waterproof agent, a waterproof reinforcingfiller and deionized water. The invention also brings forward a preparation method of the above waterproof modified adhesive for furniture finishing. The prepared adhesive is used for furniture finishing and has excellent waterproofness and glueability.
Owner:ANHUI ANDA HUATAI NEW MATERIALS CO LTD
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