| 摘要 |
The invention is directed to an arc-quenching coating compositions havi ng effective arc-quenching properties and improved track resistance properties that are relatively easy to apply and operationally positioned in high voltage curren t limiting fuses or expulsion fuses, circuit breakers, circuit interrupters, separable cable connectors, or the like. The arc-quenching coating composition comprises an arc- quenching material (A) and a film-forming polymer (B) having minimal trackin g properties, wherein the film-forming polymer (B) acts as a liquid vehicle fo r the coating composition. The arc-quenching material (A) is preferably selected from the group of guanidine, guanidine carbonate, guanidine acetate, 1,3- diphenylguanidine, guanine, melamine, melamine cyanurate, urea, hydantoin, allantoin and derivatives and mixtures thereof. The film-forming polymer (B) is preferably selected from t he group of urethane, acrylic, melamine-formaldehyde and derivatives and mixtures thereof. The invention is also directed to an arc-quenching composition having effective arc-extinguishing properties, and improved non-tracking properties and therm al stability selected from the group of guanidine carbonate, guanidine acetate, 1,3- diphenyl- guanidine, guanine, melamine cyanurate, urea, hydantoin and allantoin.</SDOA B>
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