Back to results
US 4,354,965 AGranted
Polyetheramideimide resins and electrical conductors insulated therewith
AssigneeGeneral Electric Company
InventorsYue-Guey L. Lee, Otto S. Zamek
Life of this patent
Estimating the term…
Abstract
Novel high molecular weight resins, useful for electrically insulating conductors, are prepared by polycondensing a mixture of anhydrides, and a diisocyanate and/or a diamine in an inert organic solvent, preferably in the presence of a catalytic amount of 2-methylimidazole.
Claims30
A high molecular weight polyetheramideimide resin prepared by subjecting
- (A) a combination of anhydrides comprising:
- (i) from 1 to 99 parts by weight of a dianhydride of the formula ##STR7## or a mixture thereof with at least one other dianhydride of an organic tetracarboxylic acid, and
- (ii) from 99 to 1 parts by weight of a tribasic acid anhydride, and
- (B) 0.99 to 1.01 moles, per mole of the anhydride, of a difunctional organic nitrogen compound of the formula
- (i) O.dbd.C.dbd.N--R--N.dbd.C.dbd.O,
- (ii) H.sub.2 N--R--NH.sub.2, or
- (iii) a mixture of (i) and (ii), wherein
- R is divalent alkylene of 2 to 20 carbon atoms, ##STR8## or a mixture thereof, to polycondensation at a temperature of about 60.degree. to 200.degree. C. in the presence of an inert solvent.
5 more elements
A high molecular weight polyetheramideimde resin prepared by subjecting
- (A) a combination of anhydrides comprising:
- (i) from 1 to 99 parts by weight of a dianhydride of the formula ##STR11## (ii) from 99 to 1 parts by weight of a tribasic acid anhydride and (B) 0.99 to 1.01 moles, per mole of the anhydride, of a difunctional organic nitrogen compound of the formula
- (i) O.dbd.C.dbd.N--R--N.dbd.C.dbd.O,
- (ii) H.sub.2 N--R--NH.sub.2, or
- (iii) a mixture of (1) and (ii), wherein R is ##STR12## or a mixture thereof, to polycondensation at a temperature of about 60.degree. to 200.degree. C. in the presence of an inert solvent.
2 more elements
Dependencies are inferred from the claim text.