Blends of polymeric amide-imide-ester wire enamels and conductors insulated therewith

Abstract

Abstract POLYMERIC AMIDE-IMIDE-ESTER WIRE ENAMELING COMPOSITIONS ARE PREPARED FROM (1) A MONOANHYDRIDE OF AN AROMATIC TRICARBOXYLIC ACID, E.G. TRIMELLTIC ANHYDRIDE, (2) AN AROMATIC PRIMARY DIAMINE COMPOUND AND (3) EITHER POLYFUNCTIONAL ACIDS AND POLYHYDROXY COMPOUNDS OR THE POLYESTERS THEREOF. AT LEAST A PORTION OF THE POLYOL OR POLYHYDROXY COMPOUND IS A TRIS (HYDROXYALKYL) ISOCYANURATE, E.G. TRIS (HYDROXYETHYL) ISOCYANURATE. THE POLYFUNCTIONAL ACIDS (3) COMPRISE AN ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF TRIMELLITIC ANHYDRIDE, ISOPHTHALIC ACID AND ESTERS OF ISOPHTHALIC AND TEREPHTHALIC ACID. THE POLYMERIC AMIDE-IMIDE ESTER MAY BE BLENDED WITH TEREPHTHALATE OR ISOPHTHLATE POLYESTERS, POLYISOCYANATES AND OTHER MATERIALS. ONE PARTICULARLY SUITABLE POLYISOCYANATE IS PREPARED FROM DIMETHYLTEREPHTHALATE, TRIS (2-HYDROXYETHYL) ISOCYANURATE AND TOLYLENE DIISOCYANATE. SMALL AMOUNTS OF ALIPHATIC AMINO COMPOUNDS, ALIPHATIC POLYOLS AND OTHER FLEXIBLIZING MATERIALS MAY BE INCORPORATED INTO EITHER THE POLYMERIC AMIDE-IMIDE-ESTER OR THE POLYESTER BLENDED THEREWITH. A VARIETY OF BLOCK AND MODIFIED BLOCK POLYMERS MAY BE MADE. IMIDIZATION OCCURS DURING THE PREPARATION OF THE POLYMERIC AMIDEIMIDE-ESTER SO THAT THE CONSENSED WATER IS REMOVED BEFORE THE FLUID COMPOSITIONS ARE APPLIED AND CURED.

Inventors

• 👤 Frank A Sattler

Bibliographic Details