Method of insulating an electrical conductor

A method of insulating an electrical conductor by applying thereto a coating of a polyesterimide resin which can be hardened through its free OH groups from a resin melt at above 100 DEG C., wherein the resin used is solvent-free and has been prepared by esterification or ester-exchange of starting...

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Bibliographic Details
Main Authors JANBEN; HARALD, HANSCH; FERDINAND
Format Patent
LanguageEnglish
Published 23.11.1982
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CABLES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
CONDUCTORS
CORRECTING FLUIDS
DYES
ELECTRICITY
FILLING PASTES
INKS
INSULATORS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
POLISHES
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
USE OF MATERIALS THEREFOR
WOODSTAINS
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Summary:A method of insulating an electrical conductor by applying thereto a coating of a polyesterimide resin which can be hardened through its free OH groups from a resin melt at above 100 DEG C., wherein the resin used is solvent-free and has been prepared by esterification or ester-exchange of starting materials for the polyesterimide in the presence of an excess of one or more short-chain diols and subsequent removal of the diol or diols in such a way that the condensation is only effected to an extent such that the Durrans softening point of the unhardened resin is not above 150 DEG C. (preferably not above 100 DEG C.) and the viscosity of the molten resin at 180 DEG C. is not above 5000 (preferably not above 1000) mPa s (cP). This process avoids the disadvantages encountered when a solvent is present in the insulating bath.
Bibliography:Application Number: US19800109944