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US 2026/0085209 A1Published application
Polyimide and method of manufacture
AssigneeEssex Solutions USA LLC
InventorsFrederick M. McFarland, Tamanna F. McFarland, Allan R. Knerr, Matthew E. Leach
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Abstract
A polyimide formed from the reaction of a dianhydride monomer and diamine involving and endcapped acid terminated dianhydride intermediate. The polyimide is suitable for use as a coating on wire and in particular magnetic wire so as to form insulation to improve longevity of wire and wire-based components.
Claims27
A polyimide comprising a reaction product of:
- (A) a first reaction of a dianhydride monomer and a secondary amine endcapping component to yield an endcapped acid terminated dianhydride intermediate;
- (B) a second reaction of the endcapped acid terminated dianhydride intermediate, a diamine and a dianhydride monomer to yield a polyamic acid oligomer in which the endcapping component is a leaving group;
- and
- (C) a third reaction comprising heating the polyamic acid oligomer to yield the polyimide.
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A method of preparing a polyimide comprising in order:
- (A) reacting a dianhydride monomer and a secondary amine endcapping component to yield an endcapped acid terminated dianhydride intermediate;
- (B) reacting the endcapped acid terminated dianhydride intermediate, a diamine and a dianhydride monomer to yield a polyamic acid oligomer in which the endcapping component is a leaving group;
- and
- (C) heating the polyamic acid oligomer to yield the polyimide.
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Dependencies are inferred from the claim text.