Patent · US Expired

Hot-hardening reaction resin mixture for impregnating the insulation of electrical equipment and for the manufacture of molded materials with or without inserts

US4131600A · kind A · utility

3Cited by

3References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Walter Ihlein · Berlin, DE
Wolfgang Kleeberg
Helmuth Markert · Nuremberg, DE
Willi Mertens · Berlin, DE

Key dates

Filing date	Dec 1, 1977
Grant date	Dec 26, 1978
Priority date	—
Expiry date	Dec 1, 1997

Classification

Technology area (CPC H)Electricity
CPC primaryH02K3/30
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Addition complexes of tertiary amines and boron trichloride of the general formula BCl.sub.3.NR.sub. 1 R.sub.2 R.sub. 3 are used as an accelerator system for a heat-curing reaction resin mixture of purified polyisocyanate and polyepoxy resin compounds. Insulation impregnated with this reaction resin mixture exhibits high thermal stability in the hardened condition and can be used at high operating temperatures.

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