CAS: 91-08-7; Toluene 2,6-Diisocyanate

上下游产品

CAS号75-44-5 光气 | CAS号823-40-5 2,6-二氨基甲苯 | CAS号95-80-7 2,4-二氨基甲苯 | CAS号20913-18-2 钝叶扁柏氨基甲酸酯 B | CAS号108-71-4 3，5-二氨基甲苯 | CAS号95-70-5 2,5-二氨基甲苯 | CAS号823-40-5 2,6-二氨基甲苯 | CAS号7440-44-0 活性炭

📜钝叶扁柏氨基甲酸酯 B; 2-甲基-1,3-苯二氨基甲酸二甲酯置于b-氯-1,2-苯二酚硼烷,三乙胺体系中,用 甲苯 作为反应溶剂,以100%的收率获得产物甲苯2,6-二异氰酸酯
参考文献:A Simple,Convenient,And Efficient Method For The Synthesis Of Isocyanates From Urethanes
标题:A Simple,Convenient,And Efficient Method For The Synthesis Of Isocyanates From Urethanes
摘要:
DOI:10.1021/jo00106A044

专利信息

专利号:US-6924385-B2
优先权日:2002-11-18
标 题:Method for synthesis of aliphatic isocyanates from aromatic isocyanates
发明人：LETTMANN CHRISTIAN; KOHLSTRUK STEPHAN; STOCHNIOL GUIDO; SPYROU EMMANOUIL
权利人:DEGUSSA
摘要: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 (H 12 MDI) from bis{4-isocyanatophenyl}methane (MDI). More especially, the invention relates to a method for synthesis of H 12 MDI with a trans-trans isomer content of <30%, preferably of <20%, particularly preferably of 5 to 15%.

专利号:US-4472568-A
优先权日:1981-11-12
标 题:Process for the preparation of polyamines from N-monoaryl-N',N'-dialkyl urea compounds and their use for the synthesis of polyurethanes
发明人：RASSHOFER WERNER; GROEGLER GERHARD
权利人:BAYER AG
摘要:This invention relates to an improved process for the preparation of aromatic polyamines containing urethane and/or biuret and/or urea and/or isocyanurate groups and preferably also ether groups by the hydrolysis of poly-N-monoaryl-N',N'-dialkyl urea compounds (1-aryl-3,3-dialkyl ureas). The ureas are obtained by the reaction of secondary aliphatic, cycloaliphatic or saturated heterocyclic amines with divalent to tetravalent isocyanate compounds containing isocyanate end groups attached to aromatic residues. The ureas correspond to the general formula: wherein R1, R2 denote alkyl or cycloalkyl groups, or together form a ring and A denotes a divalent to tetravalent residue attached to the ureas by aromatic groups. Hydrolysis is carried out in the presence of water and up to two equivalents of a base containing hydroxide ions and/or up to two equivalents of a compound containing tertiary amino groups, optionally in the presence of solvents. The use of the polyamines obtained by this process for the synthesis of polyurethanes is also described.

专利号:US-4476252-A
优先权日:1982-11-06
标题 :Process for the synthesis of polymers with laterally linked polyoxyalkylene chains and their use for the production of polyurethanes
发明人：ESSELBORN EBERHARD; FOCK JUERGEN
权利人:GOLDSCHMIDT AG TH
摘要:Process for the synthesis of polymers with laterally linked polyoxyalkylene chains by the free radical polymerization of polyoxyalkylene ethers with olefinic double bonds with other vinyl compounds, capable of copolymerizing wherein the polyoxyalkylene ethers of allyl and/or methallyl alcohol are copolymerized in a known manner with vinyl esters of lower carboxylic acids or mixtures of vinyl esters of lower carboxylic acids with up to 50 mole percent of esters of acrylic or methacrylic acid. The compounds can be used to advantage as reaction components having hydroxyl groups in the production of polyurethanes. In particular, they improve the mechanical properties of polyurethane foams, such as, for example, their compression hardness.

专利号:US-11780952-B2
优先权日:2016-08-08
标题:Process for the synthesis of silylated polyurethanes and silylated polyurethane composition
发明人：LAFERTE OLIVIER
权利人:BOSTIK SA
摘要:The present invention provides a process for the synthesis of silylated polyurethanes, comprising three sequential steps, a step (i) of preparing NCO-terminated polyurethane, a step (ii) of partial grafting of the NCO functions with silane functions and a step (iii) of total grafting of the residual NCO functions with functions that react with the NCO functions by means of polyfunctional compounds. The present invention also provides a silylated polyurethane composition that can be obtained by means of the process according to the invention, an adhesive composition comprising said silylated polyurethane composition and a self-adhesive item obtained from the adhesive composition according to the invention.

专利号:WO-2009135600-A1
优先权日:2008-05-07
标题:Catalysts for the synthesis of polyurethanes
发明人：LINDNER STEFAN; BAHNMUELLER STEFAN; SCHMIDT AXEL; WEIKARD JAN; BUCHMEISER MICHAEL; BANTU BHASKER; FRIEDERICHS WOLFGANG; KRAUSE JENS; REITER STEPHAN
权利人:BAYER MATERIALSCIENCE AG; LINDNER STEFAN; BAHNMUELLER STEFAN; SCHMIDT AXEL; WEIKARD JAN; BUCHMEISER MICHAEL; BANTU BHASKER; FRIEDERICHS WOLFGANG; KRAUSE JENS; REITER STEPHAN
摘要:The invention relates to novel catalysts for the synthesis of polyurethanes, represented by general formula (I) or (II), or compounds obtained by reacting a metal salt of the metals magnesium, calcium, yttrium, lanthanum, titanium, zirconium, manganese, iron, cobalt, zinc, aluminium, tin, comprising an anion from the group fluoride, chloride, bromide, sulphonate, trifluoromethanesulphonate, methanesulphonate, benzolsulphonate, para-toluenesulphonate, carboxy-C1-C10-alkyl, carboxy-C3-C10-cycloalkyl, carboxy- C2-C10-alkenyl, C1-C10-alkoxy, acetylacetonate, trifluoroacetlyacetonate or hexafluoroacetylacetonate, with N-heterocyclic compounds of general structure I; or with N-heterocyclic compounds of general structure II; or with N-heterocyclic compounds of general structure III.

专利号:US-4584354-A
优先权日:1981-04-17
标 题:Graft copolymers and the method of their preparation
发明人：HUDECEK SLAVKO; HUDECKOVA IVANA; CEFELIN PAVEL
权利人:CESKOSLOVENSKA AKADEMIE VED OF
摘要:Graft copolymers are formed having a backbone formed by monomeric units, selected from the group of vinyl monomers comprising acrylates, methacrylates, acrylamide, styrene and N-vinyl-2-phyrrolidone, and side branches formed by 10-80 wt. % of oligourethanes based on aliphatic, aromatic and alkylaromatic diisocyanates and low-molecular-weight diols with 2-4 carbon atoms in the molecule. The graft copolymers are prepared in two steps: the first step consists in the synthesis of oligourethane with the terminal unsaturated group; the second step is the radical copolymerization of this oligourethane with the above vinyl monomers.