General Electric Company

General Electric Company, Silicone Products Division

Otto S Zamek

Denis R Pauze

Richard J Jablonski

Walter Karl Olander

Yue-Guey L Lee

Denis R Pauze'

Richard J Stein

There is provided a curable ether modified polyester resin composition comprising the reaction product of (a) at least one dicarboxylic acid, (b) at least one aliphatic polyol, and (c) at least one aromatic bis (ether dianhydride) or the corresponding tetracarboxylic acid.

Ether modified polyester resins

Ether modified polyesterimide resins are prepared by reacting under esterimide forming conditions substantially free of inert solvents a mixture consisting essentially of:

Ether modified polyesterimide resins

There is provided a method for making blocked isocyanate trimers comprising (A) blocking at least one organic diisocyanate with at least one blocking compound, such as a monohydroxy compound and thereafter (B) heating the reaction product of step (A) in the presence of a catalyst having the general formula ##STR1## where each R is independently selected from hydrogen and lower alkyl radicals and R.sup.1 is an alkylene radical having up to about six carbon atoms; for an amount of time effective for forming blocked isocyanate trimers.

Methods for making blocked isocyanurates

Hot-melt electrical coating compositions comprise high solids content polyesterimides prepared to an acid number of less than 6-7 in the presence of a monoether or monoester of a glycol or polyglycol and reacted hot with a blocked polyisocyanate. Such virtually solventless compositions provide insulation coatings on electrical conductors which have superior flexibility, especially after aging.

Hot-melt polyesterimide-polyisocyanate electrical coating compositions

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.

Polyetheramideimide resins and electrical conductors insulated therewith

Improved reaction rates and yields are provided if phenolic compounds are polymerized with basic manganese chelate catalysts in a self-precipitating system comprising an aromatic hydrocarbon and a water-immiscible alcohol.

Use of manganese chelate to oxidatively couple phenolic compound in a

Superior wire enamels comprise polyester imides prepared in the presence of a monophenyl ether of a glycol having a free secondary hydroxyl group and dissolved in a solvent comprising predominantly a polar oxygenated compound selected from a monoether or monoester of an alkylene, or polyalkylene, glycol. Electrical conductors coated with such enamels are also disclosed.

Electrical conductors coated with polyester imide wire enamels

Wire enamels comprise acid-terminated polyester imides prepared to an acid number of not less than 6 in the presence of a monoether or monoester of a glycol or polyglycol and dissolved in a solvent comprising predominantly a polar oxygenated compound selected from a monoether or monoester of an alkylene, or polyalkylene, glycol. Such enamels provide insulation coatings on electrical conductors which have superior flexibility, especially after aging.

Acid-terminated polyester imide wire enamels

Polyester imide wire enamels

Superior wire enamels comprise polyester imides prepared in the presence of a monobutyl ether of a mixed diglycol having a free secondary hydroxyl group and dissolved in a solvent comprising predominantly a polar oxygenated compound selected from a monoether or monoester of an alkylene, or polyalkylene, glycol. Electrical conductors coated with such enamels are also disclosed.

Superior wire enamels comprise a polyester of a dibasic organic acid, a polyhydric alcohol having at least 3 hydroxyl groups, and 1,2-propylene glycol in a polar oxygenated solvent comprising a monoether or monoester of an alkylene or polyalkylene glycol. Electrical conductors coated with such enamels are also disclosed.

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Schenectady, NY, United States of America

Otto S Zamek