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Matches 1 - 50 out of 2,802

Document Document Title
WO/2021/063760A1
The invention relates to a process for the distillative purification of a crude isocyanate that is obtained by the phosgenation of a corresponding amine in a distillation apparatus under vacuum, in order to obtain the corresponding isocy...  
WO/2021/052894A1
The present invention concerns a method for producing an isocyanate, comprising the steps of (A) reacting an amine with a stoichiometric excess of phosgene, using an aromatic solvent of the formula C6H6–XClX, where X = 1 or 2, (a) as a...  
WO/2021/042251A1
The present invention belongs to the technical field of waterborne polyurethane resins, and in particular relates to a method for preparation of a polyisocyanate by a photochemical reaction and a method for preparing a waterborne polyure...  
WO/2021/039660A1
The present specification discloses a method for producing an isocyanate compound. The present invention relates to a method for producing a compound represented by formula (2), wherein in the presence of a water-immiscible solvent and w...  
WO/2021/033504A1
A method for producing a carbonyl compound by means of a flow reaction, wherein: a triphosgene solution is introduced into a flow path (I); the triphosgene solution comes into contact with a solid catalyst, which is affixed to at least a...  
WO/2021/033505A1
A method for producing a carbonyl compound by means of a flow reaction, wherein: a triphosgene solution, a tertiary amine solution and an active hydrogen-containing compound solution are introduced into different flow paths and are cause...  
WO/2021/027953A1
Disclosed is a preparation method for preparing diphenylmethane diisocyanate. The preparation method comprises: under a catalyst condition, performing a pyrolysis reaction on diphenylmethane dicarbamate in an inert solvent having a boili...  
WO/2020/262660A1
Provided is a method for manufacturing a spectacle lens, the spectacle lens being a cured material formed by curing a polymerizable composition including 5-(isocyanatomethyl)bicyclo[2.2.1]hepto-2-ene and one or more polythiol compounds, ...  
WO/2020/225088A1
The invention relates to a method for the purification of at least one isocyanate selected from the group consisting of aliphatic, cycloaliphatic and araliphatic isocyanates and mixtures thereof, to a method for preparing at least one is...  
WO/2020/212510A1
The present invention is directed to methods for the asymmetric synthesis of esketamine. The present invention is further directed to key intermediates in the asymmetric esketamine synthesis. In one embodiment, the invention is an asymme...  
WO/2020/196553A1
The purpose of the present invention is to provide a method that enables efficient and safe production of an N-substituted trihaloacetamide which also serves as a synthetic intermediate for isocyanate compounds, carbamate compounds, urea...  
WO/2020/132936A1
Disclosed is a method for preparing an isocyanate in a gaseous phase, comprising feeding, in the presence or absence of an inert gas, an amine-containing gas stream and a phosgene-containing gas stream into a reaction region, allowing th...  
WO/2020/124622A1
Disclosed is a method for preparing isophorone diisocyanate. The method comprises the following steps: (1) reacting isophorone with hydrogen cyanide in the presence of a catalyst to obtain isophorone nitrile; (2) reacting the isophorone ...  
WO/2020/126716A1
A method for manufacturing an isocyanate compound represented by formula (2) (2) wherein R1 represents a methyl group,an ethyl group,a cyclopropyl group, a chlorine atom, a bromine atom, or a methoxy group; and R2 represents an alkyl gro...  
WO/2020/099349A1
The invention relates to compounds that can be used for producing functional layers of electronic devices, in particular for use in electronic devices. The invention further relates to a process for preparing the compounds according to t...  
WO/2020/100971A1
The purpose of the present invention is to provide a method that makes it possible to safely and efficiently produce an isocyanate compound. This production method for an isocyanate compound is characterized by including: a step for irra...  
WO/2020/040049A1
This composition includes a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), wherein the contained amount of the compound (B) is 0.00002-2.0 parts by mass with respect to 100 parts by...  
WO/2020/040048A1
This composition includes a compound (A) represented by general formula (1) and a compound (B) represented by general formula (2), wherein the contained amount of the compound (B) is 0.00002-0.2 parts by mass with respect to 100 parts by...  
WO/2020/040050A1
Provided are: a composition that has excellent stability during storage and excellent stability during use; and a production method for the composition. The composition according to the present invention includes a compound (A) represent...  
WO/2020/040045A1
Provided are: a composition that has excellent stability during storage and excellent stability during use; and a production method for the composition. This composition includes a compound (A) represented by general formula (1), and a c...  
WO/2019/245192A1
The present invention relates to a method for preparing aliphatic isocyanates. More particularly, the present invention relates to a method for preparing isocyanates with high purity that can efficiently recover unreacted materials and r...  
WO/2019/235862A1
Provided is a method for manufacturing diisocyanate and an optical lens in which, during the manufacture of diisocyanate from diamine via diamine hydrochloride, use is made of an aqueous hydrochloric acid solution and an organic solvent ...  
WO/2019/221210A1
Provided are a method for producing a carbamate, said method comprising the following steps (1) and (2), etc.: (1) a step for producing compound (A) having a urea bond by using an organic primary amine having at least one primary amino g...  
WO/2019/207494A1
Disclosed is a process for the synthesis of pimavanserin base with a high yield and purity, which comprises: a) converting tert-butyl-N-[(4-propan-2-yloxyphenyl)methyl]carbamate (Formula (I)) to 1-(isocyanatomethyl)-4-propan-2-yloxybenze...  
WO/2019/193073A1
The invention relates to a method for recovering monomer diisocyanates, which are solid at room temperature, from a distillation residue, said method comprising the following steps: (i) preparing at least one residue which contains diiso...  
WO/2019/185608A1
The present invention relates to a catalyst for preparing carbamates, in particular aromatic carbamates, comprising a binary oxide having the formula Li_xMx02, wherein 1. is a metal selected from the lanthanoid series and M is a metal se...  
WO/2019/155169A1
The present invention relates to difunctional biphenyl compounds according to formula (I): in which Alk, Alk' and R are as defined in the description. Said compounds are suitable for use as curing agents for thermosetting resins, particu...  
WO/2019/145380A1
The invention relates to a process for the preparation of aliphatic, cycloaliphatic or araliphatic isocyanates by reacting at least one primary organic amine with a stoichiometric excess of phosgene in the gas phase, comprising the steps...  
WO/2019/134909A1
The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step α), a fraction (142) co...  
WO/2019/131855A1
Provided is a method for collecting a compound represented by general formula (III) (in the formula, R31 is a monovalent to trivalent organic group and n31 is an integer 1-3) from a liquid phase component that is formed as a by-product i...  
WO/2019/132491A1
An embodiment relates to an isocyanate composition with improved stability and reactivity and a plastic optical lens using the same. The isocyanate composition has improved stability since the content of chlorine in the composition is ad...  
WO/2019/115213A1
The present invention relates to a plant for preparing a purified isomeric methylene diphenyl diisocyanate monomer from a mixture of different isomeric monomers, wherein the plant comprises a distillation apparatus, which comprises: a) a...  
WO/2019/104888A1
Disclosed is an imine-type quaternary ammonium salt catalyst, wherein the catalyst has a general structure formula shown by formula I below; in the formula, R1 and R2, respectively, are independently selected from C1-C20 linear alkyl or ...  
WO/2019/076099A1
Disclosed are a light color modified isocyanate mixture and a preparation method therefor. The method comprises the following steps: a) reacting isocyanate groups of a raw material isocyanate under the action of a phosphorus heterocyclic...  
WO/2019/063295A1
The present invention relates to a process for the preparation of organic diisocyanates by cleaving the corresponding diurethanes into the diisocyanate and a hydroxy compound and separating the diisocyanate from the hydroxy compound by d...  
WO/2019/063296A1
The present invention relates to a multistep process for the preparation of organic diisocyanates by converting the corresponding diamine precursors, urea and hydroxy compounds into monomeric diurethanes, converting these diurethanes int...  
WO/2019/057448A1
The invention relates to an at least partly blocked polyisocyanate (BP) which is obtained by reacting a polyisocyanate (P) with at least one thermally disassociating blocking agent (BM). The polyisocyanate (P) has a general formula selec...  
WO/2019/057540A1
The invention relates to a novel method for producing polyisocyanates of (cyclo)aliphatic diisocyanates which are flocculation-stable in solvents and which comprise isocyanurate groups.  
WO/2019/057539A1
The present invention relates to novel colour-stable compositions containing polyisocyanates of (cyclo) aliphatic diisocyanates.  
WO/2019/048371A1
The invention relates to a method for cleaning a phosgene-conducting apparatus by pressurization with ammonia gas to constant pressure. In this way, phosgene residues in the apparatus to be cleaned are decomposed effectively.  
WO/2019/048644A1
The present invention provides a process for quenching, in a quenching zone, a gaseous reaction mixture comprising a diisocyanate, phosgene and hydrogen chloride that is obtained in a reaction zone upstream of the quenching zone by phosg...  
WO/2019/050236A1
The present invention relates to a method for preparing a high-purity aliphatic isocyanate comprising an aliphatic polyisocyanate, wherein in the method, the occurrence of side reactions or the production of byproducts can be suppressed....  
WO/2019/048386A1
The invention relates to a method for cleaning a phosgene conducting apparatus, comprising: washing the apparatus with hot inert gas, followed by washing the apparatus with cold inert gas; conveying gaseous ammonia for breaking down phos...  
WO/2019/043180A1
The invention relates to a method for producing an isocyanate, wherein a carbamate or thiolcarbamate is converted, in the presence of a catalyst, with separation of an alcohol or thioalcohol, at a temperature of at least 150 °C, to the ...  
WO/2019/026425A1
Provided is a flow reactor with which safety can be ensured even if a leak occurs at a line connecting part. The flow reactor is provided with at least one line structure that comprises a feedstock supply line, a reactor section for reac...  
WO/2018/224529A1
The invention relates to a method for producing isocyanates by phosgenating the corresponding primary amines in the gas phase, wherein the raw gaseous reaction product mixture is cooled and partially condensed by being brought into conta...  
WO/2018/224530A1
The invention relates to a method for producing an isocyanate by phosgenating the corresponding primary amine in the gas phase, wherein the gaseous reaction product mixture is cooled by being brought into contact with at least one flow o...  
WO/2018/212206A1
This isocyanate production method is characterized by having: a carbamation step for reacting a carbonic acid ester, an inorganic acid salt of an amino acid derivative, and a basic compound with one another, and obtaining a reaction mixt...  
WO/2018/212208A1
This isocyanate production method for producing an isocyanate by subjecting a carbamate to thermal decomposition has: a step for preparing a liquid mixture which includes a carbamate, an inert solvent, and a polyisocyanate compound; a st...  
WO/2018/190290A1
Provided is a xylylene diisocyanate composition including xylylene diisocyanate and a compound represented by chemical formula (1), wherein the content of the compound represented by chemical formula (1) is 0.6 ppm to 60 ppm.  

Matches 1 - 50 out of 2,802