Title :
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
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;
Conference_Titel :
Electrical Electronics Insulation Conference, 1989. Chicago '89 EEIC/ICWA Exposition., Proceedings of the 19th
Conference_Location :
Chicago, IL
DOI :
10.1109/EEIC.1989.208234
