[go: up one dir, main page]

ES8305725A1 - Procedimiento para la obtencion de 4,4 -difenilmetan-uretdion-diisocianatos de bajo peso molecular. - Google Patents

Procedimiento para la obtencion de 4,4 -difenilmetan-uretdion-diisocianatos de bajo peso molecular.

Info

Publication number
ES8305725A1
ES8305725A1 ES514904A ES514904A ES8305725A1 ES 8305725 A1 ES8305725 A1 ES 8305725A1 ES 514904 A ES514904 A ES 514904A ES 514904 A ES514904 A ES 514904A ES 8305725 A1 ES8305725 A1 ES 8305725A1
Authority
ES
Spain
Prior art keywords
molecular weight
low molecular
diphenyl
methane
preparation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES514904A
Other languages
English (en)
Other versions
ES514904A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6139106&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES8305725(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bayer AG filed Critical Bayer AG
Publication of ES8305725A1 publication Critical patent/ES8305725A1/es
Publication of ES514904A0 publication Critical patent/ES514904A0/es
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D229/00—Heterocyclic compounds containing rings of less than five members having two nitrogen atoms as the only ring hetero atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • C08G18/798—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing urethdione groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PROCEDIMIENTO PARA LA OBTENCION DE 4,4 -DIFENILMETANURETDION-DIISOCIANATOS DE BAJO PESO MOLECULAR, DE FORMULA (I), EN LA QUE N VALE 0-1. CONSISTE EN LA REACCION DE DIMERIZACION DE DIFENILMETAN-4,4 -DIISOCIANATO, EN DISOLVENTES INERTES AL ISOCIANATO, CONSTITUIDOS POR MEZCLAS DE DISOLVENTES APOLARES Y DISOLVENTES MODERADAMENTE POLARES, EN PRESENCIA DE CATALIZADORES DE DIMERIZACION, TALES COMO TRIALQUILFOSFINAS, A TEMPERATURAS INFERIORES A 50 C. ESTOS COMPUESTOS TIENEN APLICACIONES PARA LA OBTENCION DE POLIURETANOS DE PESO MOLECULAR ELEVADO.
ES514904A 1981-08-12 1982-08-11 Procedimiento para la obtencion de 4,4 -difenilmetan-uretdion-diisocianatos de bajo peso molecular. Granted ES514904A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813131779 DE3131779A1 (de) 1981-08-12 1981-08-12 Verfahren zur herstellung von niedermolekularen 4,4'-diphenylmethan-uretdion-diisocyanaten

Publications (2)

Publication Number Publication Date
ES8305725A1 true ES8305725A1 (es) 1983-04-16
ES514904A0 ES514904A0 (es) 1983-04-16

Family

ID=6139106

Family Applications (1)

Application Number Title Priority Date Filing Date
ES514904A Granted ES514904A0 (es) 1981-08-12 1982-08-11 Procedimiento para la obtencion de 4,4 -difenilmetan-uretdion-diisocianatos de bajo peso molecular.

Country Status (5)

Country Link
US (1) US4521338A (es)
EP (1) EP0071899B1 (es)
JP (1) JPS5839666A (es)
DE (2) DE3131779A1 (es)
ES (1) ES514904A0 (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506834A1 (de) * 1985-02-27 1986-08-28 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von additionsverbindungen aus 1 mol dimerisiertem oder niedrig-oligodimerisiertem 4,4'-diisocyanatodiphenylmethan und 2 bis 3 mol 4,4'-diisocyanatodiphenylmethan, entsprechende additionsverbindungen und ihre verwendung zur polyurethanherstellung
DE3900053A1 (de) * 1989-01-03 1990-07-12 Bayer Ag Verfahren zur herstellung von uretdion- und isocyanuratgruppen aufweisenden polyisocyanaten, die nach diesem verfahren erhaeltlichen polyisocyanate und ihre verwendung in zweikomponenten-polyurethanlacken
WO1993019049A1 (en) * 1992-03-16 1993-09-30 Olin Corporation Producing isocyanate dimers using polymer-bound catalysts
EP2159241B1 (de) * 2009-04-09 2011-05-25 Isochem Kautschuk GmbH Verfahren zur Herstellung von oligomeren Diphenylmethan-4,4'- und/oder Diphenylmethan-2,4'-diisocyanat-uretdionen
WO2013027707A1 (ja) * 2011-08-19 2013-02-28 Hoya株式会社 ウレタン系光学部材及びその製造方法
EP2730563B1 (de) * 2012-11-13 2017-01-11 Ems-Patent Ag Verfahren zur Herstellung von MDI-Dimer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683144A (en) * 1951-10-02 1954-07-06 Du Pont Polymerization of isocyanates
GB821158A (en) * 1957-01-09 1959-09-30 Ici Ltd Polymerisation of organic isocyanates
DE1445721A1 (de) * 1962-12-19 1969-01-23 Bayer Ag Verfahren zur Dimerisation aromatischer Isocyanate
GB1207673A (en) * 1967-01-02 1970-10-07 Ici Ltd New isocyanate compounds and the use thereof
US3919195A (en) * 1973-10-03 1975-11-11 Mansur Idiatullovich Bakhitov Process for producing 2,4-toluylenediisocyanate dimer
DE2419968A1 (de) * 1974-04-25 1975-12-18 Basf Ag Zaehe, waermealterungsbestaendige und verarbeitungsstabile polybutylenterephthalat-formmassen
DE2452390C2 (de) * 1974-11-05 1983-12-29 Bayer Ag, 5090 Leverkusen Verfahren zur kontinuierlichen Herstellung von aromatischen Uretdiongruppen aufweisenden Polyisocyanaten

Also Published As

Publication number Publication date
JPH0349903B2 (es) 1991-07-31
DE3262668D1 (en) 1985-04-25
US4521338A (en) 1985-06-04
JPS5839666A (ja) 1983-03-08
ES514904A0 (es) 1983-04-16
EP0071899B1 (de) 1985-03-20
DE3131779A1 (de) 1983-02-24
EP0071899A1 (de) 1983-02-16

Similar Documents

Publication Publication Date Title
DE59811531D1 (de) Verfahren zur Herstellung von Polyisocyanaten
AU532047B2 (en) Modified isocyanate
JPS5659828A (en) Production of polyisocyanate
DE3363266D1 (en) Polyamines, process for producing polyamines and their use in the production of polyurethanes
ES8305725A1 (es) Procedimiento para la obtencion de 4,4 -difenilmetan-uretdion-diisocianatos de bajo peso molecular.
US2663739A (en) Substituted phosphacyclopentane oxides and process of preparing them
ZA826755B (en) Substituted phenylsulfonylurea derivatives,a process for their preparation and their use as herbicides,and new intermediate products for their preparation
ES2002200A6 (es) Procedimiento para la obtencion de poliaminas y su empleo para la obtencion de poliuretanos
ES8706639A1 (es) Procedimiento para la dimerizacion de 4,4'-diisocianatodifenilmetano
US2998429A (en) Process for the preparation of isomaleimides
ES8303301A1 (es) Procedimiento para la obtencion de di- y-o poliuretanos n- y c-sustituidos.
GB1439314A (en) Process for the production of aromatic dicarboxylic acid diamides
JPS55115843A (en) Preparation of delta-hydroxy-ketone
EP0134245A4 (en) PROCESS FOR THE PREPARATION OF 3-CHLORO-1-FORMYL-4-PHENYL-PYRROLES.
US2947661A (en) Adduct of 1, 2-dibromo-3-chloropropane and thiourea
JPS5620002A (en) Olefin polymerization catalyst
ES8403878A1 (es) Procedimiento para la obtencion de derivados de tetrahicro-2 pirimidona metil-sustituidos.
JPS55108828A (en) Preparation of chlorination product and ethyl benzene
JPS5762255A (en) Preparation of benzamide derivative, and intermediate of benzamide derivative
JPS5695165A (en) Preparation of substituted benzoic acid amide
JPS5630432A (en) Etophylline-modified phosphazene polymer and preparation of the same
IE39025B1 (en) Esters of pyrazine-tetracarboxylic acid and their preparatation
JPS565490A (en) Preparation of amine-borane
JPS54152035A (en) Polychloroprene thixotropic adhesive composition
JPS5687588A (en) Preparation of phosphorus-containing oligomer

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991108