CA1178968A - Process for the preparation of polyisocyanates - Google Patents

Process for the preparation of polyisocyanates

Info

Publication number
CA1178968A
CA1178968A CA000396458A CA396458A CA1178968A CA 1178968 A CA1178968 A CA 1178968A CA 000396458 A CA000396458 A CA 000396458A CA 396458 A CA396458 A CA 396458A CA 1178968 A CA1178968 A CA 1178968A
Authority
CA
Canada
Prior art keywords
acid chloride
carbon atoms
radical
splitting
acid
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
CA000396458A
Other languages
English (en)
French (fr)
Inventor
Rudolf Sundermann
Klaus Konig
Theodor Engbert
Gernot Becker
Gunther Hammen
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
Application filed by Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of CA1178968A publication Critical patent/CA1178968A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00Preparation of derivatives of isocyanic acid
    • C07C263/04Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
CA000396458A 1981-03-10 1982-02-17 Process for the preparation of polyisocyanates Expired CA1178968A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813108990 DE3108990A1 (de) 1981-03-10 1981-03-10 Verfahren zur herstellung von polyisocyanaten
DEP3108990.9 1981-03-10

Publications (1)

Publication Number Publication Date
CA1178968A true CA1178968A (en) 1984-12-04

Family

ID=6126784

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000396458A Expired CA1178968A (en) 1981-03-10 1982-02-17 Process for the preparation of polyisocyanates

Country Status (7)

Country Link
US (1) US4388246A (enExample)
EP (1) EP0061013B1 (enExample)
JP (1) JPS57159752A (enExample)
BR (1) BR8201250A (enExample)
CA (1) CA1178968A (enExample)
DE (2) DE3108990A1 (enExample)
ES (1) ES510255A0 (enExample)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3362121D1 (en) * 1982-07-24 1986-03-27 Basf Ag Process for the preparation of hexamethylene diisocyanate-1,6 and/or of the isomeric diisocyanates with 6 carbon atoms in the alkyl group
DE3314790A1 (de) * 1983-04-23 1984-10-25 Basf Ag, 6700 Ludwigshafen Mehrstufenverfahren zur herstellung von 3-isocyanatomethyl-3,5,5-trimethyl-cyclohexylisocyanat
DE3314788A1 (de) * 1983-04-23 1984-10-25 Basf Ag, 6700 Ludwigshafen Mehrstufenverfahren zur herstellung von hexamethylendiisocyanat-1,6 und/oder isomeren aliphatischen diisocyanaten mit 6 kohlenstoffatomen im alkylenrest
DE3325185A1 (de) * 1983-07-13 1985-01-24 Basf Ag, 6700 Ludwigshafen In 3-stellung heterocyclische oder 3-dialkylamino-2,2-dialkyl-propylisocyanate und verfahren zur herstellung von in 3-stellung heterocyclischen oder 3-dialkylamino-2,2-dialkylpropylisocyanaten
US4587056A (en) * 1984-04-26 1986-05-06 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing an aliphatic isocyanate
US4572804A (en) * 1984-12-17 1986-02-25 The Dow Chemical Company Preparation of unsaturated isocyanates
JP2538222B2 (ja) * 1986-12-26 1996-09-25 ダイセル化学工業株式会社 イソホロンジイソシアネ−トの製造方法
DE3828033A1 (de) * 1988-08-18 1990-03-08 Huels Chemische Werke Ag Kreislaufverfahren zur herstellung von (cyclo)aliphatischen diisocyanaten
DE3915183A1 (de) * 1989-05-10 1990-11-15 Bayer Ag Verfahren zur herstellung von polyisocyanaten
DE3915181A1 (de) * 1989-05-10 1990-11-15 Bayer Ag Verfahren zur herstellung von polyisocyanaten
DE4141402A1 (de) * 1991-12-16 1993-06-17 Bayer Ag Verfahren zur herstellung von hochreinen aromatischen di- und/oder polyurethanen
DE4342426A1 (de) * 1993-12-13 1995-06-14 Bayer Ag Verfahren zur Herstellung von Diurethanen und ihre Verwendung zur Herstellung von Diisocyanaten
JP3083039B2 (ja) * 1994-03-18 2000-09-04 三菱瓦斯化学株式会社 イソシアネート類の製造方法
EP0680994A1 (en) * 1994-05-02 1995-11-08 Nippon Paint Co., Ltd. Re-Crosslinkable composition and method for recycling using the same
EP0795543B1 (de) * 1996-03-15 2001-10-31 Bayer Ag Verwendung von hochsiedenden Lösemitteln bzw. -gemischen als Wärmetauschmedium für die thermische Spaltung von Carbamidsäureestern
DE10338511A1 (de) * 2003-08-22 2005-03-17 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
DE10338509A1 (de) 2003-08-22 2005-03-17 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
DE10338508A1 (de) * 2003-08-22 2005-03-17 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
DE102004022626A1 (de) 2004-05-07 2005-12-15 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
DE102004026451A1 (de) 2004-05-29 2005-12-15 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
DE102004036499A1 (de) * 2004-07-28 2006-03-23 Degussa Ag Mehrstufiges Verfahren zur kontinuierlichen Herstellung von cycloaliphatischen Diisocyanaten
BRPI0718144B1 (pt) * 2006-11-17 2017-04-04 Asahi Kasei Chemicals Corp processo para produzir um isocianato, e, policarbamato de arila
TW200844080A (en) 2007-01-11 2008-11-16 Asahi Kasei Chemicals Corp Process for producing isocyanate
JP4958971B2 (ja) * 2007-03-30 2012-06-20 旭化成ケミカルズ株式会社 カルバミン酸エステルおよび芳香族ヒドロキシ化合物を含む組成物を用いるイソシアネートの製造方法、ならびにカルバミン酸エステル移送用および貯蔵用組成物
CA2705874C (en) * 2007-11-19 2013-10-29 Masaaki Shinohata Process for producing isocyanates and aromatic hydroxy compounds from aromatic polycarbonate resins
US9233918B2 (en) * 2008-05-15 2016-01-12 Asahi Kasei Chemicals Corporation Isocyanate production process
US8895774B2 (en) * 2008-05-15 2014-11-25 Asahi Kasei Chemicals Corporation Process for producing isocyanates using diaryl carbonate
DE102008002002A1 (de) 2008-05-27 2009-12-03 Evonik Degussa Gmbh Chlor armes mehrstufiges Verfahren zur Herstellung von cycloaliphatischen Diisocyanaten
CN101962348A (zh) * 2009-07-23 2011-02-02 中国科学院兰州化学物理研究所 一种液相热裂解制备异氰酸酯的方法
RU2528423C2 (ru) 2009-08-21 2014-09-20 Асахи Касеи Кемикалз Корпорейшн Способ получения сложного эфира n-замещенной карбаминовой кислоты и способ получения изоцианата с использованием сложного эфира n-замещенной карбаминовой кислоты
KR101507251B1 (ko) 2011-02-21 2015-03-30 아사히 가세이 케미칼즈 가부시키가이샤 카르보닐 화합물의 제조 방법
KR101348229B1 (ko) 2011-12-14 2014-01-08 경희대학교 산학협력단 지방족 디이소시아네이트의 제조방법
KR102618935B1 (ko) 2015-01-30 2023-12-27 바스프 에스이 낮은 부산물 함량의 폴리페닐렌 폴리메틸렌 폴리이소시아네이트

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2713591A (en) * 1955-07-19 boc boctanaib
US2409712A (en) * 1944-02-03 1946-10-22 Du Pont Chemical process and products
US2437867A (en) * 1946-06-01 1948-03-16 Du Pont Organic isocyanates
US2692275A (en) * 1953-01-23 1954-10-19 Rohm & Haas Preparation of 1, 8-diisocyanato-p-menthane
GB763635A (enExample) * 1953-04-10
US3734941A (en) * 1968-09-06 1973-05-22 American Cyanamid Co Process for converting urethanes to isocyanates
US3962302A (en) * 1974-03-08 1976-06-08 Atlantic Richfield Company Production of isocyanates from esters of carbamic acids (urethanes)
US3919278A (en) * 1974-06-13 1975-11-11 Atlantic Richfield Co Production of isocyanates from lower alkyl esters of mononuclear aromatic carbamic acids
US3919279A (en) * 1974-06-26 1975-11-11 Atlantic Richfield Co Catalytic production of isocyanates from esters of carbamic acids
DE2625075A1 (de) * 1976-06-04 1977-12-22 Basf Ag Verfahren zur herstellung von carbamidsaeurechloriden und isocyanaten

Also Published As

Publication number Publication date
BR8201250A (pt) 1983-01-18
ES8301900A1 (es) 1983-01-16
DE3108990A1 (de) 1982-09-23
ES510255A0 (es) 1983-01-16
EP0061013A1 (de) 1982-09-29
DE3260284D1 (en) 1984-08-02
JPH0229073B2 (enExample) 1990-06-27
US4388246A (en) 1983-06-14
EP0061013B1 (de) 1984-06-27
JPS57159752A (en) 1982-10-01

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry
MKEX Expiry

Effective date: 20020217