FR2261257A1 - Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine - Google Patents

Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine

Info

Publication number
FR2261257A1
FR2261257A1 FR7405547A FR7405547A FR2261257A1 FR 2261257 A1 FR2261257 A1 FR 2261257A1 FR 7405547 A FR7405547 A FR 7405547A FR 7405547 A FR7405547 A FR 7405547A FR 2261257 A1 FR2261257 A1 FR 2261257A1
Authority
FR
France
Prior art keywords
organic base
diphenylmethane diisocyanate
small amounts
stabilised against
pref
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
FR7405547A
Other languages
French (fr)
Other versions
FR2261257B3 (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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to FR7405547A priority Critical patent/FR2261257A1/en
Publication of FR2261257A1 publication Critical patent/FR2261257A1/en
Application granted granted Critical
Publication of FR2261257B3 publication Critical patent/FR2261257B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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)

Abstract

Diphenylmethane diisocyanate, (I) partic. distilled disphenylmethane-4,4'-diisocyanate contg. =10% of 2,4-isomer and 2% other isomers, is stabilised against discolouration on storage by incorporating a small quantity of an organic base, (II), pref. a tert amine contg. >=2 alkyl, cycloalkyl, or aralkyl gps. partic. dodecyl dimethylamine. The process is used in the prepn. of esp. solid homogeneous or elastomeric polyurethanes, having improved colour, and surface coatings. Dimerising of (I) to uretodiones can be prevented by using small quantities of (II).
FR7405547A 1974-02-19 1974-02-19 Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine Granted FR2261257A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7405547A FR2261257A1 (en) 1974-02-19 1974-02-19 Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7405547A FR2261257A1 (en) 1974-02-19 1974-02-19 Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine

Publications (2)

Publication Number Publication Date
FR2261257A1 true FR2261257A1 (en) 1975-09-12
FR2261257B3 FR2261257B3 (en) 1976-11-26

Family

ID=9135102

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7405547A Granted FR2261257A1 (en) 1974-02-19 1974-02-19 Diphenylmethane diisocyanate stabilised against discolouration - by incorporating small amounts of organic base pref. tert amine

Country Status (1)

Country Link
FR (1) FR2261257A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418248A1 (en) * 1978-02-22 1979-09-21 Upjohn Co COMPOSITION BASED ON POLYISOCYANATE
FR2418247A1 (en) * 1978-02-22 1979-09-21 Upjohn Co COMPOSITIONS BASED ON ISOCYANATES STABILIZED AGAINST THE PRODUCTION OF A COLOR AND THEIR STABILIZATION PROCESS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418248A1 (en) * 1978-02-22 1979-09-21 Upjohn Co COMPOSITION BASED ON POLYISOCYANATE
FR2418247A1 (en) * 1978-02-22 1979-09-21 Upjohn Co COMPOSITIONS BASED ON ISOCYANATES STABILIZED AGAINST THE PRODUCTION OF A COLOR AND THEIR STABILIZATION PROCESS

Also Published As

Publication number Publication date
FR2261257B3 (en) 1976-11-26

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Legal Events

Date Code Title Description
ST Notification of lapse