Title :
Cationic epoxy molded electronic (Cemtronic) technology and its applications
Author :
Ferng, William ; Baumann, Dieter ; Lehmann, Hans ; Naganuma, Yoshi
Author_Institution :
Ciba-Geigy Corp., East Lansing, MI, USA
Abstract :
The characteristics of an aromatic sulfonium fluoro antimonate salt which promotes the homopolymerization of epoxies is introduced. The influence of various epoxy resins, epoxy diluents, and inorganic fillers on the reactivity of this sulfonium salt are discussed. The uniqueness of this sulfonium salt is its attended stability at room temperature and instant reactivity towards epoxies at >70°C. Additionally, only a small amount of this sulfonium salt is needed to cure epoxies. This so called “Cemtronic catalyst” has been utilized in the electronic, electrical encapsulating and casting areas. Properties of a Cemtronic encapsulating product and a Cemtronic casting system are discussed and compared with a traditional anhydride cured epoxy system
Keywords :
casting; encapsulation; epoxy insulation; insulators; polymerisation; transformer insulation; transformers; Cemtronic casting system; Cemtronic technology; aromatic sulfonium fluoro antimonate salt; casting; cationic epoxy molded electronic technology; electrical encapsulation; epoxies homopolymerization; epoxy diluents; epoxy resins; flyback transformer; heavy electrical insulator casting; inorganic fillers; instant reactivity; room temperature; stability; Casting; Curing; Dielectrics and electrical insulation; Epoxy resins; Flyback transformers; Mechanical factors; Paper technology; Silicon compounds; Solvents; Temperature;
Conference_Titel :
Electrical Electronics Insulation Conference, 1995, and Electrical Manufacturing & Coil Winding Conference. Proceedings
Conference_Location :
Rosemont, IL
Print_ISBN :
0-941783-15-4
DOI :
10.1109/EEIC.1995.482385
