BE884805A - Procede de preparation de melanges d'isomeres du diisocyanate de diphenyl-methane a teneur reduite en uret-diones et composes chlores hydrolysables - Google Patents

Procede de preparation de melanges d'isomeres du diisocyanate de diphenyl-methane a teneur reduite en uret-diones et composes chlores hydrolysables

Info

Publication number
BE884805A
BE884805A BE0/201776A BE201776A BE884805A BE 884805 A BE884805 A BE 884805A BE 0/201776 A BE0/201776 A BE 0/201776A BE 201776 A BE201776 A BE 201776A BE 884805 A BE884805 A BE 884805A
Authority
BE
Belgium
Prior art keywords
uret
hydrolysable
diphenyl
mixtures
preparation
Prior art date
Application number
BE0/201776A
Other languages
English (en)
Original Assignee
Basf 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
Application filed by Basf Ag filed Critical Basf Ag
Publication of BE884805A publication Critical patent/BE884805A/fr

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
BE0/201776A 1979-08-18 1980-08-14 Procede de preparation de melanges d'isomeres du diisocyanate de diphenyl-methane a teneur reduite en uret-diones et composes chlores hydrolysables BE884805A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2933601A DE2933601C2 (de) 1979-08-18 1979-08-18 Verfahren zur Gewinnung von Mischungen aus Diphenyl-methan-diisocyanat-Isomeren und gegebenenfalls reinem 4,4'-Diphenylmethan-diisocyanat mit einem geringen Gehalt an Uretdionen und hydrolysierbaren Chlorverbindungen

Publications (1)

Publication Number Publication Date
BE884805A true BE884805A (fr) 1981-02-16

Family

ID=6078834

Family Applications (1)

Application Number Title Priority Date Filing Date
BE0/201776A BE884805A (fr) 1979-08-18 1980-08-14 Procede de preparation de melanges d'isomeres du diisocyanate de diphenyl-methane a teneur reduite en uret-diones et composes chlores hydrolysables

Country Status (3)

Country Link
US (1) US4294666A (fr)
BE (1) BE884805A (fr)
DE (1) DE2933601C2 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5202001A (en) * 1989-09-26 1993-04-13 Air Products And Chemicals, Inc. Preparation of urethane prepolymers having low levels of residual toluene diisocyanate
US5051152A (en) * 1989-09-26 1991-09-24 Air Products And Chemicals, Inc. Preparation of urethane prepolymers having low levels of residual toluene diisocyanate
DE19914291A1 (de) 1999-03-30 2000-10-05 Bayer Ag Verfahren zur Absenkung des Chlorgehaltes von niedermolekularen Isocyanaten
DE19914292A1 (de) 1999-03-30 2000-10-05 Bayer Ag Verfahren zur Verringerung des Chlorgehaltes von organischen Isocyanaten
DE19922572A1 (de) 1999-05-17 2000-11-23 Bayer Ag Verfahren zur Reinigung von organischen Isocyanaten, die so gereinigten organischen Isocyanate und ihre Verwendung
EP1475367B1 (fr) * 2003-05-08 2010-07-07 Bayer MaterialScience AG Procédé de séparation par distillation de mélanges d'isomères de diisocyanato diphénylméthane
DE102005053065A1 (de) * 2005-11-04 2007-05-10 Basf Ag Verfahren zur Herstellung von Polyisocyanatgemischen
US9505711B2 (en) 2010-11-17 2016-11-29 Basf Se Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate
JP2014500878A (ja) 2010-11-17 2014-01-16 ビーエーエスエフ ソシエタス・ヨーロピア ４，４’−メチレンジフェニルジイソシアネートを含む混合物を精錬するための方法
EP2640695B1 (fr) 2010-11-17 2015-01-07 Basf Se Procédé de purification de mélanges contenant du diisocyanate de 4,4'-méthylènediphényle
CN107207422B (zh) 2015-01-30 2020-12-11 巴斯夫欧洲公司 低副产物的多亚苯基多亚甲基多异氰酸酯
CN109180531B (zh) * 2018-07-25 2021-09-07 万华化学集团股份有限公司 一种获取保质期延长的mdi-50的方法
BR112021015332A2 (pt) 2019-02-07 2021-10-05 Dow Global Technologies Llc Processo de fabricação de mdi e/ou mdi polimérico, e, método para converter um isocianato de fenila em n,n'-difenilcarbodiimida
CN115724770B (zh) * 2021-08-30 2024-04-09 万华化学（宁波）有限公司 一种活性稳定的异氰酸酯组合物及其制备方法、应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3658656A (en) * 1968-11-07 1972-04-25 Takeda Chemical Industries Ltd Purification of xylylene organic diisocyanate by fractional distillation in the presence of an inert gas or superheated vapor of an organic solvent
US4118410A (en) * 1971-02-04 1978-10-03 Gottfried Reuter Gmbh I.L. Polyphenyl-polymethylene-polyisocyanate mixtures
US3857871A (en) * 1972-01-03 1974-12-31 Upjohn Co Process for reducing the acidity and hydrolyzable chloride content of polyisocyanates
US4189354A (en) * 1976-07-10 1980-02-19 Bayer Aktiengesellschaft Process for the production of diisocyanatodiphenyl methane isomers with an adjusted content of chlorine compounds

Also Published As

Publication number Publication date
US4294666A (en) 1981-10-13
DE2933601C2 (de) 1985-07-11
DE2933601A1 (de) 1981-03-12

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: BASF A.G.

Effective date: 19930831