A method of predicting the latency characteristics of accelerators used in epoxy-anhydride vacuum pressure impregnants

Author

Smith, James D B

Author_Institution

Westinghouse R&D Center, Pittsburgh, PA, USA

fYear

1989

fDate

25-28 Sep 1989

Firstpage

245

Lastpage

249

Abstract

A simple procedure is described for comparing the latency characteristics of various accelerator additives in epoxy-anhydride vacuum pressure impregnation (VPI) resins. The procedure utilizes normalized molar concentration parameters, relating to both the gel reactivity and the storage stability characteristics of the resin system, and permits a latency factor quantity to be derived for each accelerator material. The procedure is illustrated by means of experimental data obtained with eight different latent accelerators in an epoxy-anhydride resin system. This technique could be used to screen and evaluate future accelerator additives for VPI resin applications

Keywords

gels; organic insulating materials; VPI resin applications; accelerators; epoxy-anhydride vacuum pressure impregnants; gel reactivity; latency characteristics; normalized molar concentration parameters; resins; storage stability characteristics; Aluminum; Chromium; Delay; Epoxy resins; Measurement standards; Stability; Temperature; Testing; Time measurement; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Electronics Insulation Conference, 1989. Chicago '89 EEIC/ICWA Exposition., Proceedings of the 19th

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/EEIC.1989.208234

Filename

208234