GB980274A - Preparation of polyimides - Google Patents

Preparation of polyimides

Info

Publication number
GB980274A
GB980274A GB227163A GB227163A GB980274A GB 980274 A GB980274 A GB 980274A GB 227163 A GB227163 A GB 227163A GB 227163 A GB227163 A GB 227163A GB 980274 A GB980274 A GB 980274A
Authority
GB
United Kingdom
Prior art keywords
polyamide
carbon atoms
dianhydride
acid
polyimides
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
GB227163A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 US169120A external-priority patent/US3179634A/en
Priority claimed from US169119A external-priority patent/US3179633A/en
Priority claimed from US169106A external-priority patent/US3179630A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB980274A publication Critical patent/GB980274A/en
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
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C08G73/1003—Preparatory processes
    • C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)

Abstract

A process for making polyimides comprises reacting at least one diamine of the formula H2N-R1-NH2 where R1 is a divalent radica containing at least 2 carbon atoms, the 2 amino groups of said diamine each being attached to separate carbon atoms of said divalent radical, with at least one tetracarboxylic acid dianhydride of the formula <FORM:0980274/C3/1> where R is a tetravalent radical containing at least 2 carbon atoms, no more than 2 carbonyl groups of said dianhydride being attached to any one carbon atom of said tetravalent radical, in an organic solvent for at least one of the reactants, the solvent being inert to the reactants, at a temperature of from 60 DEG C. to 175 DEG C. So as to form a polymer containing polyamide and having an inherent viscosity of at least 0.1 and then effecting ring closure of the latter to convert the polyamide-acid to the polyimide. The conversion of the polyamide-acid to polyimide may be effected by heating to a temperature of 300 DEG C. to 500 DEG C., by treating it with a dehydrating agent, e.g. acetic anhydride alone or in admixture with a tertiaryamine e.g. pyridine, by ring closure with a carbodiimide, e.g. dicyclohexyl carbodiimide, or by a combination of the foregoing methods. In the examples, polyamide-acids are made from 4:41-diamino diphenyl ether and pyromellitic dianhydride and converted to polyimides by:-(1) heating to 300 DEG C. and (2) chemical treatment. Many diamines and tetracarboxylic acid dianhydrides are specified. Specifications 903,272 and 980,273 also are referred to.
GB227163A 1962-01-26 1963-01-18 Preparation of polyimides Expired GB980274A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US169120A US3179634A (en) 1962-01-26 1962-01-26 Aromatic polyimides and the process for preparing them
US169119A US3179633A (en) 1962-01-26 1962-01-26 Aromatic polyimides from meta-phenylene diamine and para-phenylene diamine
US169106A US3179630A (en) 1962-01-26 1962-01-26 Process for preparing polyimides by treating polyamide-acids with lower fatty monocarboxylic acid anhydrides

Publications (1)

Publication Number Publication Date
GB980274A true GB980274A (en) 1965-01-13

Family

ID=27389608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB227163A Expired GB980274A (en) 1962-01-26 1963-01-18 Preparation of polyimides

Country Status (3)

Country Link
GB (1) GB980274A (en)
NO (1) NO115189B (en)
SE (1) SE324456B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157303A (en) * 1984-03-05 1985-10-23 Rogers Corp Co-solvent accelerator and method for conversion of polyamide-acid, solution to polylmide
DE102010001991A1 (en) 2010-02-16 2011-08-18 Siemens Aktiengesellschaft, 80333 Flat conductor device i.e. flat wire, for use in motor of electric machine, during traction application, has insulating layer formed by covering of conductor with tape, and other insulating layer formed by covering of former layer with yarn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157303A (en) * 1984-03-05 1985-10-23 Rogers Corp Co-solvent accelerator and method for conversion of polyamide-acid, solution to polylmide
DE102010001991A1 (en) 2010-02-16 2011-08-18 Siemens Aktiengesellschaft, 80333 Flat conductor device i.e. flat wire, for use in motor of electric machine, during traction application, has insulating layer formed by covering of conductor with tape, and other insulating layer formed by covering of former layer with yarn
DE102010001991B4 (en) * 2010-02-16 2015-12-03 Siemens Aktiengesellschaft Flat conductor device with two braided insulating layers and manufacturing method

Also Published As

Publication number Publication date
NO115189B (en) 1968-08-26
SE324456B (en) 1970-06-01

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