Patent ID: 11905431
Assignee: PI ADVANCED MATERIALS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A polyimide varnish for conductor coating,
the polyimide varnish comprising: a polyamic acid solution prepared through polymerization of at least one dianhydride monomer and at least one diamine monomer in an organic solvent;
an aromatic carboxylic acid having four or more carboxyl groups;
an alkoxy silane coupling agent; and
an antioxidant,
wherein the polyimide varnish has a solid content of 15 to 38 wt % on the basis of the total weight thereof, and
a viscosity at 23° C. of 500 to 9.000 cP, and
the coated material prepared from the polyimide varnish has a degree of softening resistance of 520° C. or higher, and a breakdown voltage (BDV) of 8 kV/mm or higher.