Patent · US Expired

Aqueous electrically insulating varnish and a process for its production

US4169085A · kind A · utility

0Cited by

3References

9Claims

0Family size

Assignee

Dr. Beck + CO.AG · DE

Inventors

Ferdinand Hansch · Wedel, DE
Knut von Loh · Bad Oldesloe, DE
Harald Janssen · Glinde, DE

Key dates

Filing date	Jan 18, 1978
Grant date	Sep 25, 1979
Priority date	—
Expiry date	Jan 18, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G73/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An aqueous electrically insulating varnish is provided along with a process for producing the varnish; the process comprises the steps of reacting cyclopentane tetracarboxylic acid with dicyclic, diprimary aromatic diamine in the presence of water and neutralizing the condensation product to form a varnish.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.