GB8817132D0 - Process for removal of colour forming trace impurities from methylene bis(phenylisocyanates) - Google Patents

Process for removal of colour forming trace impurities from methylene bis(phenylisocyanates)

Info

Publication number
GB8817132D0
GB8817132D0 GB8817132A GB8817132A GB8817132D0 GB 8817132 D0 GB8817132 D0 GB 8817132D0 GB 8817132 A GB8817132 A GB 8817132A GB 8817132 A GB8817132 A GB 8817132A GB 8817132 D0 GB8817132 D0 GB 8817132D0
Authority
GB
United Kingdom
Prior art keywords
phenylisocyanates
removal
methylene bis
trace impurities
colour forming
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.)
Withdrawn
Application number
GB8817132A
Other versions
GB2207671A (en
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.)
BASF Corp
Original Assignee
BASF Corp
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 by BASF Corp filed Critical BASF Corp
Publication of GB8817132D0 publication Critical patent/GB8817132D0/en
Publication of GB2207671A publication Critical patent/GB2207671A/en
Withdrawn legal-status Critical Current

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
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6633—Compounds of group C08G18/42
    • C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • 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)
GB8817132A 1987-08-07 1988-07-19 Process for the removal of color-forming trace impurities from methylene bis (phenylisocyanates) Withdrawn GB2207671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8250687A 1987-08-07 1987-08-07

Publications (2)

Publication Number Publication Date
GB8817132D0 true GB8817132D0 (en) 1988-08-24
GB2207671A GB2207671A (en) 1989-02-08

Family

ID=22171644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8817132A Withdrawn GB2207671A (en) 1987-08-07 1988-07-19 Process for the removal of color-forming trace impurities from methylene bis (phenylisocyanates)

Country Status (1)

Country Link
GB (1) GB2207671A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124318A1 (en) * 1991-07-23 1993-01-28 Bayer Ag METHOD FOR PURIFYING POLYISOCYANATES, THE POLYISOCYANATES SO PURIFIED AND THEIR USE
DE4208359A1 (en) * 1992-03-16 1993-09-23 Bayer Ag PROCESS FOR THE PREPARATION OF ISOCYANATES OR ISOCYANATE MIXTURES AND THEIR USE FOR THE PRODUCTION OF POLYURETHANE FOAMS
DE59503894D1 (en) * 1994-04-07 1998-11-19 Bayer Ag Process for the preparation of isocyanates or isocyanate mixtures
DE4433262A1 (en) * 1994-09-19 1996-03-21 Bayer Ag Process for setting a certain iron content in diphenylmethane diisocyanate or in polyisocyanate mixtures of the diphenylmethane diisocyanate series

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759971A (en) * 1971-01-20 1973-09-18 Jefferson Chem Co Inc Purification of isocyanates

Also Published As

Publication number Publication date
GB2207671A (en) 1989-02-08

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)