ES2091525T3 - Reduccion de color de polimetileno polifenil poliisocianatos. - Google Patents

Reduccion de color de polimetileno polifenil poliisocianatos.

Info

Publication number
ES2091525T3
ES2091525T3 ES93111126T ES93111126T ES2091525T3 ES 2091525 T3 ES2091525 T3 ES 2091525T3 ES 93111126 T ES93111126 T ES 93111126T ES 93111126 T ES93111126 T ES 93111126T ES 2091525 T3 ES2091525 T3 ES 2091525T3
Authority
ES
Spain
Prior art keywords
polymethylene polyphenyl
color reduction
polyphenyl polyisocyanates
polyamins
weight
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 - Lifetime
Application number
ES93111126T
Other languages
English (en)
Inventor
Rick L Adkins
Clarence D Blue
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
Bayer Corp
Original Assignee
Bayer AG
Bayer 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 Bayer AG, Bayer Corp filed Critical Bayer AG
Application granted granted Critical
Publication of ES2091525T3 publication Critical patent/ES2091525T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C265/00—Derivatives of isocyanic acid
    • C07C265/14—Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

EL PRESENTE INVENTO ESTA DIRIGIDO A UN PROCESO PARA LA PRODUCCION DE POLIISOCIANATOS DE POLIFENIL POLIMETILENO POR FOSFOGENACION DE LAS CORRESPONDIENTES POLIAMINAS DISUELTAS EN UN DISOLVENTE INORGANICO, ELIMINANDO POSTERIORMENTE EL FOSGENO EXCEDENTE, Y QUITANDO DESPUES EL DISOLVENTE. LA MEJORA CONSISTE EN LA ADICION DE AL MENOS 0.02 PARTES POR PESO DE UN AGENTE REDUCTOR POR CADA 150 PARTES DE PESO DE POLIAMINA EN LAS POLIAMINAS EN EL MOMENTO ANTERIOR AL PASO DE ELIMINACION DEL DISOLVENTE.
ES93111126T 1992-07-23 1993-07-12 Reduccion de color de polimetileno polifenil poliisocianatos. Expired - Lifetime ES2091525T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/920,229 US5312971A (en) 1992-07-23 1992-07-23 Color reduction of polymethylene polyphenyl polyisocyanates

Publications (1)

Publication Number Publication Date
ES2091525T3 true ES2091525T3 (es) 1996-11-01

Family

ID=25443388

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93111126T Expired - Lifetime ES2091525T3 (es) 1992-07-23 1993-07-12 Reduccion de color de polimetileno polifenil poliisocianatos.

Country Status (8)

Country Link
US (1) US5312971A (es)
EP (1) EP0581100B1 (es)
JP (1) JP3436778B2 (es)
KR (1) KR100256186B1 (es)
BR (1) BR9302950A (es)
CA (1) CA2098949A1 (es)
DE (1) DE69304463T2 (es)
ES (1) ES2091525T3 (es)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386059A (en) * 1991-12-10 1995-01-31 Miles Inc. Process for preparing polyamines for lighter color polyisocyanate based foam
DE19711447A1 (de) * 1997-03-19 1998-09-24 Basf Ag Verfahren zur Herstellung von Isocyanaten mit heller Farbe
US5942151A (en) * 1997-11-20 1999-08-24 Bayer Corporation Polymeric MDI color
US6004482A (en) * 1997-12-24 1999-12-21 Bayer Corporation Stable aromatic amine composition, and a process for preparing color stable aromatic amines
DE19815055A1 (de) * 1998-04-03 1999-10-07 Bayer Ag Verfahren zur Farbaufhellung von polymeren Diphenylmethandiisocyanat sowie die Verwendung von aufgehellten Diphenylmethandiisocyanat bei der Herstellung von Polyurethankunststoffen
CN1099430C (zh) * 1998-11-23 2003-01-22 烟台万华聚氨酯股份有限公司 一种聚合多亚甲基多苯基多异氰酸酯的生产方法及专用装置
US6166128A (en) * 1998-12-08 2000-12-26 Bayer Corporation Color reduction of polymethylene poly (phenylisocyanates)
US6127463A (en) * 1999-03-23 2000-10-03 Bayer Corporation Polymeric MDI color reduction
DE19928741A1 (de) 1999-06-23 2000-12-28 Basf Ag Helle Isocyanate, Verfahren zu deren Herstellung und deren Verwendung
DE10228734A1 (de) * 2002-06-27 2004-01-22 Bayer Ag Verfahren zur Herstellung von Polyisocyanaten der Diphenylmethanreihe mit vermindertem Farbwert
JP4920186B2 (ja) * 2004-07-21 2012-04-18 三井化学株式会社 メチレン架橋ポリフェニレンポリイソシアネートの製造方法
DE102006002157A1 (de) * 2006-01-17 2007-07-19 Bayer Materialscience Ag Verfahren zur Herstellung heller Isocyanate
HUE027861T2 (en) * 2007-11-14 2016-11-28 Covestro Deutschland Ag Preparation of pale isocyanates
HUE030997T2 (en) * 2008-11-26 2017-06-28 Huntsman Int Llc Process for the preparation of isocyanates
EP2421818B1 (de) 2009-04-24 2014-08-27 Basf Se Verfahren zur herstellung von farbstabilem mda und mdi
CN103874680B (zh) 2011-10-21 2016-07-06 拜耳知识产权有限责任公司 生产浅色多异氰酸酯的方法
CN103319372B (zh) * 2012-03-19 2014-11-05 万华化学集团股份有限公司 一种制备浅色二环己基甲烷二异氰酸酯的方法
TWI530510B (zh) * 2012-11-01 2016-04-21 旭化成化學股份有限公司 聚異氰酸酯組成物及異氰酸酯聚合物組成物
US10927066B2 (en) * 2016-09-14 2021-02-23 Basf Se Process for hydrogenating a mixture in the presence of a colorless amine
CN109761855B (zh) 2018-12-20 2020-07-28 万华化学集团股份有限公司 一种制备异佛尔酮二异氰酸酯的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733254A (en) * 1956-01-31 Method of producing organic
US3277139A (en) * 1963-06-13 1966-10-04 Mobay Chemical Corp Process for preparing organic polyisocyanates
US3362979A (en) * 1964-01-02 1968-01-09 Jefferson Chem Co Inc Mixtures of methylene-bridged polyphenyl polyisocyanates
US3641094A (en) * 1968-03-12 1972-02-08 Bayer Ag Preparation of isocyanates
US3912600A (en) * 1974-05-09 1975-10-14 Upjohn Co Recovery of polymethylene polyphenyl polyisocyanate from a phoshenosed polyamine feed
US4259526A (en) * 1979-02-21 1981-03-31 Bayer Aktiengesellschaft Process for the preparation of mixtures of polyamines of the polyamino-polyaryl-polymethylene type
US4465639A (en) * 1983-01-26 1984-08-14 The Upjohn Company Process for polyisocyanates
US4792624A (en) * 1987-02-26 1988-12-20 The Dow Chemical Company Process for polymeric MDA, recycle of finished polymeric MDA
DE4006976A1 (de) * 1990-03-06 1991-09-12 Basf Ag Verfahren zur herstellung von mischungen aus diphenylmethan-diisocyanaten und polyphenyl-polymethylen-polyisocyanaten mit einer verminderten iodfarbzahl

Also Published As

Publication number Publication date
EP0581100B1 (en) 1996-09-04
CA2098949A1 (en) 1994-01-24
DE69304463D1 (de) 1996-10-10
JPH0687815A (ja) 1994-03-29
US5312971A (en) 1994-05-17
KR100256186B1 (ko) 2000-05-15
EP0581100A1 (en) 1994-02-02
DE69304463T2 (de) 1997-01-30
JP3436778B2 (ja) 2003-08-18
BR9302950A (pt) 1994-03-01
KR940002274A (ko) 1994-02-17

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