NL7215795A - - Google Patents

Info

Publication number
NL7215795A
NL7215795A NL7215795A NL7215795A NL7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A NL 7215795 A NL7215795 A NL 7215795A
Authority
NL
Netherlands
Application number
NL7215795A
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
Application filed filed Critical
Publication of NL7215795A publication Critical patent/NL7215795A/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • 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
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • 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
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
NL7215795A 1971-11-30 1972-11-22 NL7215795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5549771A GB1384065A (en) 1971-11-30 1971-11-30 Process for the purification of organic isocyanates

Publications (1)

Publication Number Publication Date
NL7215795A true NL7215795A (en) 1973-06-04

Family

ID=10474102

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7215795A NL7215795A (en) 1971-11-30 1972-11-22

Country Status (4)

Country Link
JP (1) JPS4862737A (en)
AU (1) AU4904072A (en)
GB (1) GB1384065A (en)
NL (1) NL7215795A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5337852B2 (en) * 1974-06-04 1978-10-12
DE2631168B2 (en) * 1976-07-10 1979-03-08 Bayer Ag, 5090 Leverkusen Process for the preparation of diisocyanatodiphenylmethane isomers with an adjusted content of chlorine compounds
JP2875877B2 (en) * 1990-10-23 1999-03-31 三井化学株式会社 Method for producing methylene-crosslinked polyphenylene polyisocyanate
US5185384A (en) * 1991-01-28 1993-02-09 The Dow Chemical Company Method for reducing hydrolyzable chloride in toluene diisocyanate
BR9200378A (en) * 1991-01-28 1992-10-13 Dow Chemical Co PROCESS FOR THE PREPARATION OF REACTIVE DIESOCIANATE TOLUENE DISTILLATION SUPPORTS AND STABLE VISCOSITY AND DIISOCIANATE TOLUENE HAVING REDUCED HYDROLYSABLE CHLORIDE LEVELS
DE19914292A1 (en) 1999-03-30 2000-10-05 Bayer Ag Reduction of the chorine content of low molecular isocyanates comprises reaction with a tertiary or quaternary amine group containing anion exchanger for ten minutes at less than two hundred degrees
DE19914291A1 (en) 1999-03-30 2000-10-05 Bayer Ag Process for the purification of a low molecular isocyanate, comprises addition of an oligomeric organic polyphosphate compound and heating for ten minutes below two hundred degrees
DE19922572A1 (en) 1999-05-17 2000-11-23 Bayer Ag Process for the purification of organic isocyanates, the organic isocyanates thus purified and their use
US9505711B2 (en) * 2010-11-17 2016-11-29 Basf Se Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate
US20120123153A1 (en) * 2010-11-17 2012-05-17 Basf Se Method for purifying mixtures comprising 4,4'-methylenediphenyl diisocyanate
EP3250622B1 (en) 2015-01-30 2018-11-07 Basf Se Polyphenylene polymethylene polyisocyanates with low by-products

Also Published As

Publication number Publication date
AU4904072A (en) 1974-05-23
JPS4862737A (en) 1973-09-01
GB1384065A (en) 1975-02-19

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Legal Events

Date Code Title Description
BV The patent application has lapsed