- 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.
- -
-
Paragraph 0367; 0369-0379; 0399; 0402-0403
(2021/06/22)
-
- Method for preparing isocyanate with low hydrolytic chlorine content by gas phase method
-
The invention relates to a method for preparing isocyanate with low hydrolytic chlorine content by a gas phase method, which comprises the following steps of: carrying out phosgenation reaction on corresponding amine and stoichiometric excess phosgene in a reaction zone in the presence or absence of an inert medium; wherein the reaction conditions are selected such that at least the reaction components amine, isocyanate and phosgene are gaseous under these conditions, and feeding of at least one gas stream comprising amine and at least one gas stream comprising phosgene into the reaction zone, and introducing of a carbon dioxide stream in a quenching zone at the rear end of the reaction zone are carried out, and the molar content of the carbon dioxide stream is less than 60% of the molar weight of the phosgene stream, so that the isocyanate with low hydrolytic chlorine content can be obtained more easily, the product yield is improved, and the investment cost of the device is reduced.
- -
-
Paragraph 0037-0038
(2021/05/22)
-
- 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.
- -
-
Paragraph 0419-0430; 0447-0451; 0454-0458; 0462
(2020/05/02)
-
- PRODUCTION METHOD OF ISOCYANATE
-
PROBLEM TO BE SOLVED: To provide a production method of isocyanate for producing isocyanate continuously by suppressing a side reaction. SOLUTION: A production method of isocyanate is a method for producing isocyanate by pyrolysis of carbamate. The method includes a pyrolysis process for performing a pyrolysis reaction of carbamate by introducing continuously a mixed liquid containing carbamate and a compound (A) having a specific structure into a pyrolysis reactor, a low-boiling point decomposition product recovery process for extracting, continuously from the pyrolysis reactor in a gas phase, a low-boiling point decomposition product having a lower normal boiling point than the compound (A), and a high-boiling point component recovery process for extracting, continuously from the pyrolysis reactor as a high-boiling point component, a liquid phase component not recovered in the gas phase in the low-boiling point decomposition product recovery process. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
- -
-
Paragraph 0164; 0165; 0169; 0170
(2020/02/14)
-
- METHOD FOR PRODUCING ISOCYANATE
-
PROBLEM TO BE SOLVED: To provide a method for producing isocyanate that suppresses a side reaction and continuously produces isocyanate. SOLUTION: The present invention provides a method for producing isocyanate by pyrolysis of carbamate, the method including: a pyrolysis step in which a liquid mixture containing carbamate and at least one compound (A) selected from a phenolic polymer having a repeating unit represented by general formula (4) and a phenol represented by general formula (5) is continuously introduced into a pyrolytic reactor for a pyrolytic reaction of carbamate; a low-boiling-point pyrolytic product recovery step in which a low-boiling-point pyrolytic product having a normal boiling point lower than that of the compound (A) is continuously extracted in a gas state from the pyrolytic reactor; and a high-boiling-point component recovery step in which a liquid phase component, which has not been recovered in a gas state in the low-boiling-point pyrolytic product recovery step, is continuously extracted as a high-boiling-point component from the pyrolytic reactor. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
- -
-
Paragraph 0171-0172; 0176-0177
(2020/03/13)
-
- METHOD FOR PRODUCING ISOCYANATE
-
PROBLEM TO BE SOLVED: To provide a method for producing isocyanate that suppresses a side reaction and continuously produces isocyanate. SOLUTION: The present invention provides a method for producing isocyanate by pyrolysis of carbamate, the method including: a pyrolysis step in which a liquid mixture containing carbamate and at least one compound (A) selected from a compound represented by general formula (4), a compound represented by general formula (5) and a compound represented by general formula (6) is continuously introduced into a pyrolytic reactor for a pyrolytic reaction of carbamate; a low-boiling-point pyrolytic product recovery step in which a low-boiling-point pyrolytic product having a normal boiling point lower than that of the compound (A) is continuously extracted in a gas state from the pyrolytic reactor; and a high-boiling-point component recovery step in which a liquid phase component, which has not been recovered in a gas state in the low-boiling-point pyrolytic product recovery step, is continuously extracted as a high-boiling-point component from the pyrolytic reactor. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
- -
-
Paragraph 0169; 0170; 0174-0175
(2020/01/09)
-
- Preparation method of isophorone diisocyanate
-
The invention relates to a preparation method of isophorone diisocyanate. Catalyst polyoxometallate and a solvent are added into a reaction vessel, then raw materials comprising isophorone diamine andphenylsilane, an acid-binding agent and a dehydrating agent are added, uniform mixing is carried out, finally, gaseous carbon dioxide is added, magnetic stirring is carried out for a sufficient reaction at a certain temperature, and a product is obtained. The method has the advantages that Anderson type heteropolyacid is adopted as a catalyst, the catalyst requires mild reaction conditions and high specificity and selectivity, and is recyclable and friendly to the environment, the cleanability of an industrial reaction is improved, the technological economy is improved, the manufacturing costand the generation of three wastes are reduced, the environmental protection pressure is reduced, and the industrial production is facilitated.
- -
-
Paragraph 0026-0055
(2019/10/01)
-
- Method for preparing IPDI (isophorone diisocyanate)
-
The invention discloses a method for preparing IPDI (isophorone diisocyanate). The method comprises the following steps: (1) isophorone and hydrogen cyanide are subjected to a reaction in the presenceof a catalyst to obtain isophorone nitrile; (2) isophorone nitrile obtained in step (1), ammonia and hydrogen are subjected to a reaction in the presence of a catalyst to obtain isophorone diamine; (3) isophorone diamine is subjected to a phosgenation reaction to obtain IPDI, wherein the content of impurities containing secondary amine groups in isophorone diamine subjected to the phosgenation reaction in step (3) is smaller than or equal to 0.5wt%, preferably smaller than or equal to 0.3wt%, and more preferably smaller than or equal to 0.1wt%. By means of the method, content of hydrolyzed chlorine in the IPDI product can be effectively reduced, the yellowing resistance of the product is effectively improved, and the harm that downstream products are unqualified due to existence of hydrolyzed chlorine in the product is reduced.
- -
-
Paragraph 0091; 0097
(2019/06/13)
-
- 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.
- -
-
Paragraph 0140-0148; 0175-0182
(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.
- -
-
Paragraph 0089-0090
(2017/07/07)
-
- TWO-STEP AND ONE-POT PROCESSES FOR PREPARATION OF ALIPHATIC DIISOCYANATES
-
The present invention relates to using a two-step (thermolysis) or one-pot process to prepare aliphatic diisocyanates from aliphatic diamines and diaryl carbonates. Polyisocyanates can also be prepared from polyamines and diaryl carbonates. The present synthetic processes do not apply phosgene or highly toxic reagents and chloro-solvents during the entire procedure.
- -
-
Paragraph 0128-0129
(2017/02/02)
-
- A method of synthesizing diisocyanate
-
The invention discloses a method for synthesizing diisocyanate. The method for synthesizing diisocyanate comprises the following steps: (1) dissolving diamine into an organic solvent to form a diamine organic solution; (2) adding biuret and a catalyst into the diamine organic solution formed in the step (1) to form reaction mixed liquor; (3) putting the reaction mixed liquor in an inert gaseous environment, reacting at the temperature 120-180 DEG C and the pressure of 0.7-2.0MPa for 0.5 hour at least, so as to obtain reactants; (4) filtering the reactants obtained in the step (3) to obtain a filter cake and filtrate; and (5) rectifying the filtrate obtained in the step (4), so that diisocyanate is obtained. The method for synthesizing the diisocyanate has the advantages that the diamine and the biuret directly react in the presence of a complex metal oxide catalyst to generate diisocyanate, reaction steps are simple, operation is easy, reaction conditions are mild, and yield of the diisocyanate is high.
- -
-
Paragraph 0083-0084
(2017/02/24)
-
- 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
- -
-
Paragraph 0120
(2017/01/02)
-
- Curable inks comprising diurethane gelators
-
The disclosure provides curable inks including a diurethane gelator having the structure of Formula I. wherein R and R′ each, independently of the other, is a C1-C22 saturated aliphatic hydrocarbon group selected from the group consisting of (1) linear aliphatic groups, (2) branched aliphatic groups, (3) cyclic aliphatic groups, (4) aliphatic groups containing both cyclic and acyclic portions, any carbon atom of the saturated aliphatic hydrocarbon group may be optionally substituted with an alkyl group (cyclic or acyclic), wherein (1) and (2) groups have a carbon number of from about 1 to about 22 carbons, and wherein (3) and (4) groups have a carbon number of from about 4 to about 10 carbons; and X is selected from the group consisting of: (i) an alkylene group, (ii) an arylene group, (iii) an arylalkylene group, and (iv) an alkylarylene group.
- -
-
Page/Page column
(2014/07/22)
-
- PROCESS FOR THE PREPARATION OF ISOCYANATES
-
An isocyanate is produced by reacting an amine with a stoichiometric excess of phosgene in the gas phase. This reaction is carried out at a temperature above the amine's boiling point to obtain a liquid stream containing the isocyanate and a gas stream containing hydrogen chloride and phosgene. The gas stream containing hydrogen chloride and phosgene thus produced is separated into a gas stream containing hydrogen chloride and a liquid stream containing phosgene. At least part of the liquid stream containing phosgene is then converted to a gas stream containing phosgene which gas stream is then recycled. The gaseous phosgene stream is maintained at a higher pressure than the liquid phosgene stream.
- -
-
Page/Page column 11-12
(2012/05/21)
-
- 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.
- -
-
Page/Page column 45
(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.
- -
-
Page/Page column 35
(2011/04/14)
-
- 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.
- -
-
Page/Page column 54-55
(2011/02/18)
-
- 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.
- -
-
Page/Page column 44
(2011/05/03)
-
- 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.
- -
-
Page/Page column 163; 171
(2011/06/10)
-
- 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.
- -
-
Page/Page column 7
(2011/02/18)
-
- METHOD FOR PRODUCING ISOCYANATES
-
The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.
- -
-
Page/Page column 7
(2010/12/26)
-
- 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.
- -
-
Page/Page column 9-10; 13
(2010/03/02)
-
- 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.
- -
-
Page/Page column 66
(2010/02/17)
-
- 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.
- -
-
Page/Page column 4
(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.
- -
-
Page/Page column 6
(2010/05/13)
-
- 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.
- -
-
-
- 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.
- -
-
Page/Page column 45-46
(2009/09/05)
-
- 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).
- -
-
Page/Page column 34
(2009/09/05)
-
- PROCESSES FOR PREPARING LOW-CHLORINE ISOCYANATES
-
Processes comprising providing an amine reactant, and reacting the amine reactant with a stream of phosgene in a reaction zone to form a product comprising a corresponding isocyanate, wherein the phosgene stream has a CO content of 0.5% by weight or more.
- -
-
Page/Page column 3-4
(2009/04/24)
-
- 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.
- -
-
Page/Page column 6
(2009/09/05)
-
- Aqueous Dispersions Of Polyorganosiloxanes Containing Urea Groups
-
Polyorganosiloxanes containing urea groups can be obtained in the form of aqueous dispersions by firstly dissolving them in an organic solvent, then dispersing this solution with water with co-use of auxiliaries, subjecting the mixture to homogenization and then at least partially removing the organic solvent. The aqueous dispersions prepared in this way are suitable as additive for detergents, fabric softeners, haircare compositions, shampoos and for textile finishing.
- -
-
-
- Process for the preparation of isocyanates in the gas phase
-
An isocyanate is produced by reacting a primary amine with phosgene in the gas phase above the boiling point of the amine over an average contact time of 0.05 to 15 seconds under adiabatic conditions.
- -
-
Page/Page column 4
(2008/12/06)
-
- PROCESS FOR THE PREPARATION OF DIISOCYANATES
-
The invention relates to a process for the preparation of isocyanates in the gas phase, in which the possibilities for back-mixing and byproduct formation are reduced by improving the mixing of the starting materials in a tubular reactor.
- -
-
Page/Page column 3-4
(2008/06/13)
-
- Method for producing monoisocyanates and oligoisocyanates
-
The present invention relates to a process for the preparation of aliphatic, cycloaliphatic, araliphatic and aromatic mono- and oligoisocyanates by phosgenation of the corresponding primary amines at atmospheric pressure, which comprises a) introducing a catalytic amount of a monoisocyanate (isocyanate a) into an inert solvent together with phosgene; b) adding the primary amine, and c) reacting the resulting reaction mixture with phosgene.
- -
-
Page column 6-7
(2010/02/05)
-
- Fluorine rubber composition
-
A fluorine rubber composition comprising a fluorine rubber and a polyfluoroalkyl group-containing block isocyanate compound represented by the following general formula: where Rf is a polyfluoroalkyl group having 4 to 20 carbon atoms; R is a divalent organic group; R1 is a lower alkyl group or phenyl group; R2 is a lower alkyl group; X is NH or O; n is an integer of 1 to 4 and m is 0 or 1, has a good vulcanization bond to metals without any substantial decrease in the rubber stretchability properly owned by the fluorine rubber.
- -
-
-
- Synthesis of isocyanates from carbamate esters employing boron trichloride
-
The conversion of carbamate esters to isocyanates and diisocyanates of industrial importance is possible using BCl3 in the presence of Et3N; the reaction is simple in execution and work-up, occurring under mild conditions and affording isocyanates in excellent yields.
- Butler,Alper
-
p. 2575 - 2576
(2007/10/03)
-
- Bisulfite-blocked polyisocyanates as tanning agents
-
The present invention relates to tanning agents containing carbamoyl sulfonate groups that are prepared by the reaction of (A) organic polyisocyanates, (B) 0.01 to 0.4 equivalents, relative to the isocyanate groups of polyisocyanate (A), of polyether alcohols having incorporated polyalkylene oxide units (the equivalents of the polyether alcohol being based on the hydroxyl groups), wherein 40 to 100 mole-% of the polyalkylene oxide units consist of polyethylene oxide units having a sequence length of 5 to 70, (C) optionally, NCO-reactive components other than polyether polyol (B), and (D) ammonium or alkali bisulfites or disulfites.
- -
-
-
- Amid group-containing diisocyanates and amide group-containing epoxy resins
-
An amide group-containing epoxy resin obtained by reacting an epoxy resin with an amide group-containing diisocyanate obtained by reacting a diisocyanate with a dicarboxylic acid gives a uniform cured article showing high adhesiveness and is usable as an adhesive, a coating composition, and the like.
- -
-
-
- Impregnated porous granules and a polyurethane matrix held within the pores thereof and holding a liquid material for controlled release of liquid material and process therefor
-
A composition of matter having a clay porous granule and a polyurethane matrix formed from the polymerization of a polyol and a polyisocyanate and held within the pores of the granule and having uniformly distributed throughout the polyurethane matrix a liquid material, for example, a pesticide and a method for loading a porous granule with the polyurethane and the liquid material by: (a) spraying a porous granule with a liquid composition comprising a polyol, a polyisocyanate and a liquid material to be retained in the porous granule, and (b) polymerizing the polyol and the polyisocyanate to form a polyurethane matrix polymer which has the liquid materials uniformly distributed throughout the polyurethane matrix.
- -
-
-
- 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.
- -
-
-
- 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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- Novel isocyanate prepolymers and secondary amines from disecondary amines and alkyl diisocyanates
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Disclosed are novel isocyanate prepolymers and novel secondary amines, both prepared from alkyl diisocyanates and secondary isopropyl derivatives of polyoxyalkylene diamines. The molar ratios, reaction procedures (i.e. inverse addition of reactants) and solvent determine the products. Most of the products are light colored and nongelled. The isocyanate prepolymers are useful in the field of polyurethanes and the novel secondary amines are useful in epoxy coatings applications.
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- Process for preparing diamines
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Polyoxyalkylene diamine reaction products which contain as the principle reaction component, a diamine having the formula: STR1 wherein R' independently represents hydrogen or methyl and x is a number having an average value of at least 1 to about 60 and a diisocyanate of the formula: STR2 The products of the invention are obtained by reacting an excess of polyoxyalkylene diamine with a diisocyanate in the presence of a polar solvent and have the following general structures: STR3 where B is alkyl group from diisocyanates, and R' has the same meaning as above. These products are further used to prepare coatings with improved properties by reacting said amine products with isocyanates prepolymers and epoxy material.
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- Process for the preparation of (cyclo)aliphatic diisocyanates
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The present invention relates to a process for the preparation of diisocyanates corresponding to the formula wherein R denotes a (cyclo)aliphatic hydrocarbon group with up to 15 carbon atoms by phosgenation of the corresponding diamines represented by the formula in the gas phase, characterized in that (a) the diamines in vapor form, optionally diluted with an inert gas or with the vapors of an inert solvent, and phosgene are separately heated to temperatures of about 200° to 600° C. and continuously reacted together in a cylindrical reaction chamber which is free from moving parts and heated to about 200° to 600° C., while a turbulent flow is maintained in the reaction chamber. (b) the gas mixture continuously leaving the reaction chamber is passed through an inert solvent for the diisocyanate which is maintained at a temperature above the decomposition temperature of the carbamic acid chloride corresponding to the diamine, and (c) the diisocyanate which is dissolved in the inert solvent is purified by distillation.
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- Polyfluoroalkylthio alcohols, esters and useful compositions therefrom
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Polyfluoroalkylthio alcohols and esters thereof are disclosed with utility as intermediates for the synthesis of fluorochemicals with low free surface energies having oil and water repellent properties. The novel alcohols and esters are obtained by a free radical catalyzed addition of polyfluoroalkylthiols to acetylenic alcohols or esters thereof. The alcohols are employed in preparation of fluorine containing polyurethanes which are useful as finishes to provide oil and water repellency to textiles and as additives to plastics to provide mold release and other desirable properties.
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- Urethanes containing two perfluoroalkylthio groups
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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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- RF-glycols containing two perfluoroalkylthio groups and useful compositions therefrom
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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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- New Rf -glycols containing two perfluoroalkylthio groups and useful compositions therefrom
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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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