Insulating varnish and production method therefor and insulated electric wire using same and production method therefor
US8642179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2011 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Nov 21, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An insulating varnish includes a polyamide-imide resin including a repeat unit represented by Formula (1) below derived from a synthesis reaction between a resin component (X) and a diisocyanate component (Y). The resin component (X) is derived from a synthesis reaction between a diamine component including aromatic diamines including g a divalent aromatic group (R) including three or more aromatic rings, and an acid component in the presence of an azeotrope solvent. The diisocyanate component (Y) includes a 2,4′-diphenylmethane diisocyanate (Y1) and a 4,4′-diphenylmethane diisocyanate (Y2).In Formula (1), R denotes the divalent aromatic group including three or more aromatic rings, and m and n denote an integer of from 1 to 99.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.