Patent ID: 6420030
Filing Date: 2002-07-16
Classification: B82Y,C01P,C08K,C09C,C09D,Y10T

Abstract:
Black iron-based composite particles comprising:black iron oxide particles or black iron oxide hydroxide particles having an average particle size of 0.08 to 1.0 &mgr;m; a coating layer formed on the surface of said black iron oxide particle or black iron oxide hydroxide particles, comprising at least one organosilicon compound selected from the group consisting of: (1) organosilane compounds obtained from an alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtained from a fluoroalkylsilane compounds; and a carbon black coat formed on said coating layer comprising said organosilicon compound, in an amount of 1 to 30 parts by weight based on 100 parts by weight of said black iron oxide particles or black iron oxide hydroxide particles.