cas 5124-30-1, Methylene-bis(4-cyclohexylisocyanate)

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METHOD FOR PRODUCING CARBAMATE AND METHOD FOR PRODUCING ISOCYANATE
The present invention provides a method for producing a carbamate that includes a step (1) and a step (2) described below: (1) a step of producing a compound (A) having a urea linkage, using an organic primary amine having at least one primary amino group per molecule and at least one compound selected from among carbon dioxide and carbonic acid derivatives, at a temperature lower than the thermal dissociation temperature of the urea linkage; and(2) a step of reacting the compound (A) with a carbonate ester to produce a carbamate.
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Paragraph 0367; 0369-0379; 0399; 0402; 0406; 0409-0410

(2021/06/22)

ISOCYANATE PRODUCTION METHOD
An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.
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Paragraph 0419-0430; 0447-0451; 0454-0458; 0462

(2020/05/02)

Preparation method of 4,4'-dicyclohexyl methane diisocyanate
The invention relates to a preparation method of 4,4'-dicyclohexyl methane diisocyanate. The method comprises the steps of firstly, adding a catalyst polyoxometallate and a solvent into a reaction vessel; then, adding a raw material of 4,4'-diamino dicyclohexyl methane, phenylsilane, an acid-binding agent and a dehydrating agent, and uniformly mixing the materials; finally, adding gaseous carbon dioxide and stirring the mixture for a thorough reaction through a magnetic force at a certain temperature to obtain a product. According to the method, M-Anderson type heteropoly acid is used as the catalyst, and the catalyst needs mild reaction conditions and is high in specific selectivity, recyclable and environmentally friendly; the cleanliness of an industrial reaction is improved, the economic efficiency of the process is improved, the manufacturing cost and the generation of three wastes are reduced, the environmental protection pressure is reduced, and industrial production is facilitated.
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Paragraph 0027-0060

(2019/10/01)

Method for preparing polyisocyanate through photochemical reaction, and method for preparing waterborne polyurethane resin
The invention especially relates to a method for preparing polyisocyanate through a photochemical reaction, and a method for preparing waterborne polyurethane resin, belonging to technical field of waterborne polyurethane resin. The method for preparing the waterborne polyurethane resin comprises a step of carrying out a polymerization reaction on raw materials containing polyisocyanate, oligomerpolyol, a chain extender and a hydrophilic agent to obtain the waterborne polyurethane resin, wherein the content of benzophenone impurities in the polyisocyanate is less than or equal to 0.045 wt%. By controlling the content of benzophenone impurities in the preparation process of polyisocyanate, the yellowing resistance of the waterborne polyurethane resin can be effectively improved, and harm to the qualified rate of downstream products caused by existence of the impurities in the waterborne polyurethane resin is also reduced.
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Paragraph 0097-0127; 0149-0174

(2019/12/11)

Method for preparing isocyanate by using amine and carbonyl fluoride
The invention discloses an efficient synthesis method for preparing corresponding isocyanate by enabling carbonyl fluoride to directly react with amine. The efficient synthesis method mainly comprises the following two steps: carrying out acylation reaction on the amine and the carbonyl fluoride according to a preferable proportion in an anhydrous inertial organic solvent under a sealed environment and a proper reaction condition, thus generating an intermediate-carbamyl fluoride; (2) carrying out dehydrofluorination on the intermediate-carbamyl fluoride under normal pressure and the proper reaction condition, thus obtaining the target isocyanate. During a reaction process, addition of a catalyst is not needed, the reaction conditions are mild, excessive carbonyl fluoride and a used solvent during the reaction process can be efficiently recycled and reused, and a by-product HF can be commercially sold after being collected and refined.
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Paragraph 0095-0096

(2017/07/07)

LINEAR GLYCIDYL CARBAMATE (GC) RESINS FOR HIGHLY FLEXIBLE COATINGS
This invention relates to coating compositions comprising a linear glycidyl carbamate (GC) resin and a curing agent. The linear GC-resins were synthesized using linear and cycloaliphatic diisocyanates and a combination of diols and optional triols with glycidol. The combination of linear diisocyanates and diols introduces a more linear structure in the GC-resin compositions.
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Page/Page column

(2015/04/15)

Using carbon dioxide diarylbutadiene isocyanate production method (by machine translation)
PROBLEM TO BE SOLVED: To provide a method in which there are not various problems shown in a prior art when isocyanate is manufactured without using phosgene, and that can stably manufacture isocyanate for the long period of time in good yield. SOLUTION: The manufacturing method of isocyanate includes: a process in which diaryl carbonate and an amine compound are made to react in the presence of an aromatic hydroxy compound as a reaction solvent, thereby a reaction mixture that includes carbamic acid aryl having an aryl group originated from diaryl carbonate, an aromatic hydroxy compound originated from diaryl carbonate, and diaryl carbonate is obtained; a process in which the reaction mixture is transported to a thermal cracking reactor; and a process in which the carbamic acid aryl is subjected to a thermal decomposition reaction to obtain isocyanate, wherein a reactor in which the reaction of diaryl carbonate and an amine compound is performed and a thermal cracking reactor of carbamic acid aryl are different. COPYRIGHT: (C)2013,JPO&INPIT
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Paragraph 0121

(2017/01/02)

METHOD FOR PREPARING ALIPHATIC DIISOCYANATE
The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield.
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Paragraph 0041

(2014/10/16)

PROCESS FOR THE PREPARATION OF N-SUBSTITUTED CARBAMIC ACID ESTER AND PROCESS FOR THE PREPARATION OF ISOCYANATE USING THE N-SUBSTITUTED CARBAMIC ACID ESTER
The present invention provides a method for producing N-substituted carbamic acid-O-aryl ester derived from a compound having an ureido group, the method comprising the step of carrying out esterification or esterification and transesterification from the compound having the ureido group and a hydroxy composition containing one type or a plurality of types of hydroxy compounds.
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Page/Page column 163; 172

(2011/06/10)

ISOCYANATE PRODUCTION PROCESS
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.
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Page/Page column 41

(2011/05/03)

METHOD FOR PREPARING ISOCYANATES BY LIQUID-PHASE THERMAL CRACKING
The present invention discloses a method for preparing isocyanates by liquid-phase catalytic thermal cracking. In this method, in a reaction-rectification thermal cracking reactor, using a catalyst composition comprising a superfine powder metal oxide catalyst and an ionic liquid, an alkyl or aryl dialkylurethane, or multialkylurethane being a reactant is liquid-phase thermal cracked for a reaction time of 0.5-3 h under a reaction temperature of 160-220° C. and an absolute pressure of 1000-8000 Pa so as to prepare the corresponding isocyanate. The invention has the characteristics of low thermal cracking temperature, high yield of target products, relatively simple reaction apparatus and good universality for substrates (the yields of HDI, MDI, TDI, HMDI, NDI and IPDI or the like are all >85%) and the like.
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Page/Page column 6

(2011/02/18)

PROCESS FOR PRODUCING ISOCYANATE
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a thermal decomposition reaction, including the steps of: recovering a low boiling point component in a form of a gaseous phase component from a thermal decomposition reaction vessel in which the thermal decomposition reaction is carried out; recovering a liquid phase component containing a carbamic acid ester from a bottom of the thermal decomposition reaction vessel; and supplying all or a portion of the liquid phase component to an upper portion of the thermal decomposition reaction vessel.
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Page/Page column 50-51

(2011/02/18)

PROCESS FOR PRODUCING ISOCYANATES USING DIARYL CARBONATE
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention provides an isocyanate production process including the steps of: obtaining a reaction mixture containing an aryl carbamate having an aryl group originating in a diaryl carbonate, an aromatic hydroxy compound originating in a diaryl carbonate, and a diaryl carbonate, by reacting a diaryl carbonate and an amine compound in the presence of a reaction solvent in the form of an aromatic hydroxy compound; transferring the reaction mixture to a thermal decomposition reaction vessel; and obtaining isocyanate by applying the aryl carbamate to a thermal decomposition reaction, wherein the reaction vessel in which the reaction between the diaryl carbonate and the amine compound is carried out and the thermal decomposition reaction vessel for the aryl carbamate are different.
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Page/Page column 36

(2011/04/14)

PROCESS FOR PRODUCING ISOCYANATE USING DIARYL CARBONATE
An object of the present invention is to provide a process that enables isocyanate to be produced stably over a long period of time and at high yield without encountering problems of the prior art during production of isocyanate without using phosgene. The present invention provides an isocyanate production process including the steps of: obtaining a reaction mixture containing an aryl carbamate having an aryl group originating in a diaryl carbonate, an aromatic hydroxy compound originating in a diaryl carbonate, and a diaryl carbonate, by reacting a diaryl carbonate and an amine compound in the presence of a reaction solvent in the form of an aromatic hydroxy compound; transferring the reaction mixture to a thermal decomposition reaction vessel; and obtaining isocyanate by applying the aryl carbamate to a thermal decomposition reaction, wherein the reaction vessel in which the reaction between the diaryl carbonate and the amine compound is carried out and the thermal decomposition reaction vessel for the aryl carbamate are different.
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Page/Page column 45-46

(2011/02/18)

LOW CHLORINE, MULTI-STAGED METHOD FOR PRODUCING CYCLOALIPHATIC DISOCYANATES
Low chlorine, multi-staged method for producing cycloaliphatic diisocyanates. The invention relates to a multi-staged method for the continuous low-chlorine production of cycloaliphatic diisocyanates, comprising the synthesis of diaminodipheynl alkanes, the hydration thereof into the corresponding cycloaliphatic diamines and the subsequent conversion of cycloaliphatic diamines to the corresponding cycloalkylene biscarbamates and the thermal cleaving of the latter into the cycloaliphatic diisocyanates and alcohol.
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Page/Page column 16

(2011/02/25)

METHOD FOR PRODUCTION OF ISOCYANATE USING COMPOSITION COMPRISING CARBAMIC ACID ESTER AND AROMATIC HYDROXY COMPOUND, AND COMPOSITION FOR TRANSPORT OR STORAGE OF CARBAMIC ACID ESTER
An object of the present invention is to provide an isocyanate production process, which is free of the various problems found in the prior art, and which uses a composition containing a carbamic acid ester and an aromatic hydroxy compound when producing isocyanate without using phosgene, as well as a carbamic acid ester composition for transferring or storing carbamic acid ester. The present invention discloses an isocyanate production process including specific steps and using a composition containing a carbamic acid ester and an aromatic hydroxy compound, as well as a composition for transfer or storage of carbamic acid ester comprising the carbamic acid ester and the specific aromatic hydroxy compound.
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Page/Page column 66

(2010/02/17)

COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A POLYMER BEARING JUNCTION GROUPS, AND COSMETIC TREATMENT PROCESS
The present patent application relates to a cosmetic or dermatological composition comprising, in a cosmetically or dermatologically acceptable medium, a polymer comprising: (a) a polymer backbone that may be obtained by reaction: of a polyol comprising 3 to 6 hydroxyl groups;of a monocarboxylic acid containing 6 to 32 carbon atoms;of a polycarboxylic acid comprising at least two carboxylic groups COOH, and/or of a cyclic anhydride such as a polycarboxylic acid and/or of a lactone comprising at least one carboxylic group COOH; and(b) at least one junction group linked to the said polymer backbone and capable of establishing H bonds with one or more partner junction groups, each pairing of a junction group involving at least three H (hydrogen) bonds. The patent application also concerns a cosmetic treatment process using the said composition.
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(2010/10/03)

Hole jet reactor and a process for the preparation of an isocyanate using the reactor
The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.
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Page/Page column 3

(2010/06/16)

JET REACTOR WITH FLOW DUCTS AND PROCESS FOR PREPARING ISOCYANATES USING IT
The present invention provides a flow duct type jet reactor and a process for preparing isocyanates using it. The flow duct type jet reactor situates flow ducts in inner feed pipe which form whirlpool and reinforce vortex, thereby amine steam rapidly admixes and reacts with phosgene, and the byproducts are reduced. In addition, the present process uses a jet-absorption apparatus which rapidly cools the high temperature gas discharged from the reactor to a temperature at which the product is thermally stable, and at the same time provides negative pressure for the reaction process of the system, and thus saving bulky vacuum system.
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Page/Page column 5; 6

(2010/05/13)

PROCESS FOR THE CONTINUOUS PREPARATION OF (CYCLO)ALIPHATIC DIISOCYANATES
The invention relates to a multi-stage process for the continuous, phosgene-free preparation of (cyclo)aliphatic diisocyanates that comprises the conversion of (cyclo)aliphatic diamines into the corresponding (cyclo)alkylene biscarbamates and the thermal cleaving of the latter into the (cyclo)alkylene diisocyanates and alcohol. The urea used in accordance with the invention and also the urea employed for the preparation of urea equivalents (e.g. alkyl carbonates, alkyl carbamates) as a possible precursor for the synthesis of the (cyclo)aliphatic biscarbamates is unconditioned.
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Page/Page column 12-13

(2010/03/02)

METHOD FOR PRODUCING ISOCYANATE
An object of the present invention is to provide a process that enables isocyanates to be stably produced over a long period of time at high yield without encountering various problems as found in the prior art when producing isocyanates without using phosgene. The present invention discloses a process for producing an isocyanate, comprising the steps of: reacting a carbamic acid ester and an aromatic hydroxy compound to obtain an aryl carbamate having a group derived from the aromatic hydroxy compound; and subjecting the aryl carbamate to a decomposition reaction, wherein the aromatic hydroxy compound is an aromatic hydroxy compound which is represented by the following formula (1) and which has a substituent R1 at at least one ortho position of a hydroxyl group: (wherein ring A represents an aromatic hydrocarbon ring in a form of a single or multiple rings which may have a substitute and which have 6 to 20 carbon atoms; R1 represents a group other than a hydrogen atom in a form of an aliphatic alkyl group having 1 to 20 carbon atoms, an aliphatic alkoxy group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aryloxy group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms or an aralkyloxy group having 7 to 20 carbon atoms, the group containing an atom selected from a carbon atom, an oxygen atom and a nitrogen atom; and R1 may bond with A to form a ring structure).
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Page/Page column 37

(2009/09/05)

A HOLE JET REACTOR AND A PROCESS FOR THE PREPARATION OF AN ISOCYANATE USING THE REACTOR
The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.
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Page/Page column 5

(2009/09/05)

PROCESS FOR PRODUCING ISOCYANATE
An object of the present invention is to provide a process allowing long-term, stable production of isocyanates at a high yield without the various problems found in the prior art during production of isocyanates without using phosgene. The present invention discloses a process for producing an isocyanate by subjecting a carbamic acid ester to a decomposition reaction in the presence of a compound having an active proton and a carbonic acid derivative.
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Page/Page column 48

(2009/09/05)

Multistage continuous preparation of cycloaliphatic diisocyanates
The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.
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Page/Page column 6

(2008/06/13)

Multistage continuous preparation of cycloaliphatic diisocyanates
Cycloaliphatic diisocyanates can be prepared continuously and phosgene-free by reacting at least one cycloaliphatic diamine with at least one carbonic acid derivative and at least one alcohol to give a cycloaliphatic diurethane; freeing the cycloaliphatic diurethane of a low boiler, a medium boiler and mixtures thereof; thermally cleaving the cycloaliphatic diurethane in a cleavage apparatus to give a cycloaliphatic diisocyanate and a cleavage residue; continuously discharging a portion of the cleavage residue from the cleavage apparatus; removing the high boiler components from the discharge to obtain a purified discharge; reurethanizing the purified discharge with alcohol to obtain a reurethanized discharge; and recycling the reurethanized discharge into the process.
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Page/Page column 7-8

(2008/06/13)

Multistage continuous preparation of cycloaliphatic diisocyanates
A process for continuous phosgene-free preparation of cycloaliphatic diisocyanates.
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Page/Page column 5-7

(2008/06/13)

Method for synthesis of aliphatic isocyanates from aromatic isocyanates
The invention relates to a method for synthesis of aliphatic isocyanates from aromatic isocyanates in substantially 3 stages. In particular, the invention relates to a method for synthesis of bis{4-isocyanatocyclohexyl}methane (H12MDI) from bis{4-isocyanatophenyl}methane (MDI). More especially, the invention relates to a method for synthesis of H12MDI with a trans-trans isomer content of 30%, preferably of 20%, particularly preferably of 5 to 15%.
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Page 10

(2008/06/13)

Storage-stable biuret polyisocyanates
Storage-stable biuret polyisocyanates useful, e.g., for the production of paints and adhesives, are prepared by reacting at least one aliphatic, alicyclic or arylaliphatic diisocyanate with a biuret-forming reactant, in the presence of an effective amount of at least one organic carboxylic acid and/or anhydride thereof.
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(2008/06/13)

Preparation of biureto polyisocyanates
Clear, precipitate-free, storage-stable biureto polyisocyanates, well adopted for paint applications, are prepared by reacting at least one aliphatic, alicyclic or arylaliphatic monomeric diisocyanate with water, at a temperature of at least 70° C. and under an absolute pressure of at least 1.2 bar, including a partial pressure of carbon dioxide of at least 0.2 bar.
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(2008/06/13)

Urethanes containing two perfluoroalkylthio groups
Perfluoroalkylthio glycols and esters thereof can be prepared by the free-radical catalyzed addition of a perfluoroalkylthiol to an acetylenic alcohol or ester thereof. The compounds obtained are useful intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. In one embodiment, a perfluoroalkylthio glycol can be reacted with a diisocyanate to obtain a polyurethane containing perfluoroalkylthio groups, which polyurethanes are useful as coatings to provide oil and water repellence to textiles and as additives to plastics to provide mold-release and other desirable properties.
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(2008/06/13)