EXTERNAL ADDITIVE FOR ELECTROPHOTOGRAPHIC TONER, METHOD FOR MANUFACTURING THE EXTERNAL ADDITIVE, ELECTROPHOTOGRAPHIC TONER USING THE EXTERNAL ADDITIVE, AND IMAGE FORMING APPARATUS USING THE ELECTROPHOTOGRAPHIC TONER

   
   

An external additive for a toner, having an average primary particle diameter not greater than 100 nm and including at least inorganic fine particles and a hydrophobizing agent applied to the surface of the inorganic fine particles, wherein after the external additive is treated with chloroform, pyrolysates of the residual components include a compound having at least one structure selected from organopolysiloxane structures and ring siloxane structures.

Un additivo esterno per un toner, avendo un diametro primario medio non più notevolmente di 100 nm della particella ed includendo almeno le particelle fini inorganiche e un agente hydrophobizing applicato alla superficie delle particelle fini inorganiche, in cui dopo che l'additivo esterno sia trattato con cloroformio, i pyrolysates dei componenti residui includono un residuo che ha almeno una struttura scelta dalle strutture del organopolysiloxane e dalle strutture del silossano dell'anello.

 
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