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FR2444057A1 - Procede de preparation de polymethylene polyphenyl polycarbamates - Google Patents

Procede de preparation de polymethylene polyphenyl polycarbamates

Info

Publication number
FR2444057A1
FR2444057A1 FR7930757A FR7930757A FR2444057A1 FR 2444057 A1 FR2444057 A1 FR 2444057A1 FR 7930757 A FR7930757 A FR 7930757A FR 7930757 A FR7930757 A FR 7930757A FR 2444057 A1 FR2444057 A1 FR 2444057A1
Authority
FR
France
Prior art keywords
reaction
acid catalyst
preparation
polymethylene polyphenyl
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.)
Granted
Application number
FR7930757A
Other languages
English (en)
Other versions
FR2444057B1 (fr
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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
Priority claimed from JP15372778A external-priority patent/JPS5581850A/ja
Priority claimed from JP15414378A external-priority patent/JPS5581851A/ja
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Publication of FR2444057A1 publication Critical patent/FR2444057A1/fr
Application granted granted Critical
Publication of FR2444057B1 publication Critical patent/FR2444057B1/fr
Expired 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
    • 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
    • C08G18/701—Compounds forming isocyanates or isothiocyanates in situ

Landscapes

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

Abstract

L'invention a pour objet un procédé de préparation de polyméthylène polyphényl polycarbamates suivant lequel on fait réagir un ester d'acide N-phényl carbamique avec du formaldéhyde ou un composé producteur de formaldéhyde en présence d'eau et d'un catalyseur acide, on utilise le catalyseur acide sous forme d'une solution aqueuse ayant, au début de la réaction, une concentration en catalyseur acide d'au moins 10 % en poids et en une proportion, au début de la réaction, de 0,01 à 100 moles par mole d'ester d'acide N-phényl carbamique, et on effectue la réaction à une température de 20 à 150 degrés C. Après bonne fin de la réaction, on peut récupérer la solution aqueuse de catalyseur acide contenant de petites quantités d'impuretés organiques, ajuster sa concentration en catalyseur acide, puis la réutiliser directement pour une réaction suivante.
FR7930757A 1978-12-14 1979-12-14 Procede de preparation de polymethylene polyphenyl polycarbamates Expired FR2444057B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15372778A JPS5581850A (en) 1978-12-14 1978-12-14 Preparation of polymethylene polyphenyl polycarbamate
JP15414378A JPS5581851A (en) 1978-12-15 1978-12-15 Preparation of polymethylene polyphenyl polycarbamate

Publications (2)

Publication Number Publication Date
FR2444057A1 true FR2444057A1 (fr) 1980-07-11
FR2444057B1 FR2444057B1 (fr) 1985-11-22

Family

ID=26482265

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7930757A Expired FR2444057B1 (fr) 1978-12-14 1979-12-14 Procede de preparation de polymethylene polyphenyl polycarbamates

Country Status (6)

Country Link
CA (1) CA1120051A (fr)
DE (1) DE2950386C2 (fr)
FR (1) FR2444057B1 (fr)
GB (1) GB2044252B (fr)
IT (1) IT1126563B (fr)
NL (1) NL185077C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460972A1 (fr) * 1979-07-09 1981-01-30 Mitsui Toatsu Chemicals Procede de preparation de polymethylene polyphenyl polycarbamates

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3013907A1 (de) * 1980-04-11 1981-10-22 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von methylen-bis-phenylcarbaminsaeureestern und polymethylen-polyphenylcarbamidsaeureestern
DE3370152D1 (en) * 1982-12-07 1987-04-16 Asahi Chemical Ind Process for producing diphenylmethane dicarbamates
JPS6267059A (ja) * 1985-09-18 1987-03-26 Nippon Kokan Kk <Nkk> ジフエニルメタンジカルバミン酸エステル類の製造方法
CN117185962A (zh) * 2022-08-30 2023-12-08 海南华盛水泥投资有限公司 高效制备二苯甲烷二氨基甲酸甲酯的方法及其制备的产物和应用

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042891B (de) * 1956-08-16 1958-11-06 Bayer Ag Verfahren zur Herstellung von stickstoffhaltigen Kondensationsprodukten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042891B (de) * 1956-08-16 1958-11-06 Bayer Ag Verfahren zur Herstellung von stickstoffhaltigen Kondensationsprodukten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460972A1 (fr) * 1979-07-09 1981-01-30 Mitsui Toatsu Chemicals Procede de preparation de polymethylene polyphenyl polycarbamates

Also Published As

Publication number Publication date
DE2950386C2 (de) 1987-02-05
NL185077C (nl) 1990-01-16
NL7908982A (nl) 1980-06-17
FR2444057B1 (fr) 1985-11-22
GB2044252B (en) 1983-04-20
CA1120051A (fr) 1982-03-16
NL185077B (nl) 1989-08-16
IT7927992A0 (it) 1979-12-07
DE2950386A1 (de) 1980-07-03
IT1126563B (it) 1986-05-21
GB2044252A (en) 1980-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse