25686-28-6

Basic information

• Product Name: Benzene, 1,1-methylenebis4-isocyanato-, homopolymer
• Synonyms: Benzene, 1,1-methylenebis4-isocyanato-, homopolymer;1,1''-METHYLENEBIS(4-ISOCYANATOBENZENE, HOMOPOLYMER;MDI homopolymer
• CAS NO: 25686-28-6
• Molecular Formula: (C15H10N2O2)X
• Molecular Weight: 250.26
• Product Categories: Polymers
• Mol File: 25686-28-6.mol
• Article Data: 46

Chemical Properties

• Appearance: /
• Vapor Pressure: 0.001Pa at 20℃
• Water Solubility: 30μg/L at 22℃
• CAS DataBase Reference: Benzene, 1,1-methylenebis4-isocyanato-, homopolymer(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1,1-methylenebis4-isocyanato-, homopolymer(25686-28-6)
• EPA Substance Registry System: Benzene, 1,1-methylenebis4-isocyanato-, homopolymer(25686-28-6)

Safety Data

• Hazardous Substances Data: 25686-28-6(Hazardous Substances Data)

Usage

Flammability and Explosibility

Notclassified

Upstream product

• 75-44-5 phosgene 
• 101-77-9 4,4'-diamino diphenyl methane 
• 1767-02-8 4,4'-Di(trimethylsilylamino)-diphenylmethan 
• 57586-53-5 Dimethylsilanyl-{4-[4-(1,1,3,3-tetramethyl-disilazan-2-yl)-benzyl]-phenyl}-amine 
• 32315-10-9 bis(trichloromethyl) carbonate 
• 7450-63-7 dimethyl 4,4'-methylenebis(1,4-phenylene)diurethane 
• 10097-16-2 (methylenedi-4,1-phenylene)bis-carbamic acid diethyl ester 
• 60483-67-2 N,N'-(4,4'-methanediyl-di-phenyl)-bis-carbamic acid dipropyl ester 
• 50-00-0 formaldehyd 
• 1208-52-2 2,4'-diaminodiphenylmethane 
• 6582-52-1 2,2'-methylenedianiline 
• 1027096-23-6 N,N'-(4,4'-methanediyl-diphenyl)-biscarbamic acid bis(2,4-di-tert-amylphenyl) ester 
• 102894-34-8 N,N'-(4,4'-methanediyl-di-phenyl)-bis-carbamic acid diisopentyl ester 
• 101-65-5 N,N'-(4,4'-methanediyl-di-phenyl)-bis-carbamic acid diphenyl ester 

Downstream Products

• 66168-47-6 bis-[4-(2-oxo-pyrrolidine-1-carbonylamino)-phenyl]-methane 
• 58067-56-4 2,2'-dicyano-N,N'-(4,4'-methanediyl-di-phenyl)-bis-malonamic acid diethyl ester 
• 124161-58-6 N,N'-(4,4'-methanediyl-di-phenyl)-bis-carbamic acid bis-(2-trimethylammonio-ethyl ester); diiodide 
• 100914-59-8 chloro-bis-(4-isocyanato-phenyl)-methane 
• 58890-25-8 1.1'--bis-<3-cyclohexyl>-harnstoff 
• 7747-61-7 1,1-(methanediyldibenzene-4,1-diyl)bis[3-(2-hydroxyethyl)urea] 
• 20723-71-1 C₂₁H₂₂N₂O₄ 
• 56360-75-9 C₂₉H₃₀N₆O₂ 
• 53050-41-2 C₂₁H₂₄N₈O₂ 
• 16133-33-8 1,3,5-tris-[4-(4-isocyanato-benzyl)-phenyl]-2,2-dimethyl-[1,3,5,2]triazasilinane-4,6-dione 
• 21649-23-0 4,4'-Bis--diphenylmethan 
• 56360-74-8 C₂₁H₃₀N₆O₂ 
• 53050-39-8 C₂₁H₃₀N₆O₂ 
• 56360-76-0 C₂₁H₃₀N₆O₄ 

Relevant articles and documents

FLOW CHEMISTRY SYNTHESIS OF ISOCYANATES

The disclosure provides, inter alia, safe and environmentally-friendly methods, such as flow chemistry, to synthesize isocyanates, such as methylene diphenyl diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and tetramethylxylene diisocyanate.

Method for preparing diphenylmethane diisocyanate through efficient catalysis by polyoxometallate

The invention discloses a method for preparing 4,4'-diphenylmethane diisocyanate from 4,4'-diaminodiphenylmethane and methanol under the catalysis of a polyoxometallate (wherein the polyoxometallate is one of six basic configurations of a Keggin type, a Wells-Dawson type, a Lindeqvist type, a Waugh type Anderson type and a Silverton type, and the Anderson type configuration is mainly adopted). Themethod comprises the following specific steps: adding M-Anderson type heteropolyacid (M is Mn, Fe, Al, Cr, Co, Ni, Cu, Zn and the like) as a catalyst, 4,4'-diaminodiphenylmethane, methanol, hydrogenperoxide, an acid-binding agent, a dehydrating agent and an anhydrous acetonitrile solvent into a clean reaction tube; and finally sleeving an oxygen ball above a reactor, and carrying out a completestirring reacting for a period of time by air magnetic force at a certain temperature to obtain a target compound. According to the method disclosed by the invention, M-Anderson type heteropolyacid isused as the catalyst, and the catalyst has extremely high reaction activity, takes common non-noble metals as the center, further has popularization and utilization values and can be recycled after simple treatment, so that the cleanness of industrial reaction is improved, and the environmental protection pressure is reduced.

Preparation method for diphenylmethane diisocyanate

The invention provides a preparation method for diphenylmethane diisocyanate. The preparation method comprises a step of subjecting diphenylmethane dicarbamate to a pyrolysis reaction in an inert solvent having a boiling point lower than the boiling point of diphenylmethane diisocyanate in the presence of a catalyst so as to produce diphenylmethane diisocyanate. The preparation method provided bythe invention has the advantages of high reaction conversion rate, high yield, simple equipment and process and mild reaction conditions, and can meet the demands of industrial production.