摘要 |
PURPOSE:To prevent the sticking of a toner and to minimize the deterioration in characteristic by forming a coating layer consisting of a specific compd. and a resin on the surface of an inorg. carrier core material thereby having a resin coating layer. CONSTITUTION:A coating layer 2 formed on the outside surface of a carrier core material 1 consists of a laminate of a layer 2A of a compd. expressed by the general formula I and a resin layer 2B by which particularly excellent moisture resistance and durability are obtd. R1 in the formula is a hydrogen atom, subst. or unsubstd. alkyl group or substd. or unsubstd. alkenyl group, R2 is a substd. or unsubstd. alkyl group or substd. or unsubstd. alkenyl group. The preferred coating amt. of the compd. and the coating resin is in a range of 0.01-5wt% with the compd. basing on the entire weight of the carrier, and in a range of 0.1-1.0wt% with the coating resin. The glass transition temp. of the coating resin is preferably at least 60 deg.C. |