Ultra-high solids theic polyester enamels
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United States of America Patent
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Oct 30, 1990
Grant Date -
N/A
app pub date -
Sep 30, 1987
filing date -
Sep 30, 1987
priority date (Note) -
Expired
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Abstract
An ultra-high solids content, organic solvent solution of polyester magnet wire enamel is described. The enamel is a tris (2-hydroxy-ethyl) isocyanurate polyester having a ratio of hydroxyl to carboxyl groups of 1.65 to 2.0:1 and a hydroxyl number of 216 to 316. Such enamels are produced with solids contents of greater than 70% by weight and viscosity less than 3,000 cps at 160.degree. C. The method of making such enamel by reacting a glycol, tris (2-hydroxy-ethyl) isocyanurate, and an aromatic diacid or diester, reacting this polymer with modifying phenolic and polyisocyanate and adding an aromatic titanate catalyst is also described.
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