Global Patent Index - EP 0945766 A3

EP 0945766 A3 20000223 - Black non-magnetic composite particles for black toner and black toner using the same

Title (en)

Black non-magnetic composite particles for black toner and black toner using the same

Title (de)

Schwarze nicht-magnetische zusammengesetzte Teilchen für schwarze Toner und schwarze Toner, worin sie eingesetzt werden

Title (fr)

Particules composées, non-magnétiques, noires pour révélateurs noirs et révélateurs noirs les comprenant

Publication

EP 0945766 A3 (EN)

Application

EP 99302317 A

Priority

JP 10013698 A

Abstract (en)

[origin: EP0945766A2] Black non-magnetic composite particles for a Black toner of the present invention comprising: (a) hematite and/or iron oxide hydroxide particles having an average particle diameter of from 0.055 to 0.95 mu m; (b) a coating on the surface of said hematite and/or iron oxide hydroxide particles, comprising at least one organosilicon compound selected from: (1) organosilane compounds obtainable by drying or heat-treating alkoxysilane compounds, (2) polysiloxanes or modified polysiloxanes, and (3) fluoroalkyl organosilane compounds obtainable by drying or heat-treating fluoroalkylsilane compounds; and (c) carbon black fine particles adhered on said coating, which have a particle diameter of from 0.002 to 0.05 mu m and which are present in an amount of from 1 to 25 parts by weight per 100 parts by weight of said hematite and/or iron oxide hydroxide particles.

IPC 1-7

G03G 9/09; G03G 9/083; G03G 9/097

IPC 8 full level

G03G 9/083 (2006.01); G03G 9/09 (2006.01)

CPC (source: EP)

G03G 9/0838 (2013.01); G03G 9/0839 (2013.01); G03G 9/0902 (2013.01); G03G 9/0904 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0945766 A2 19990929; EP 0945766 A3 20000223; EP 0945766 B1 20030514; DE 69907795 D1 20030618; DE 69907795 T2 20040401

DOCDB simple family (application)

EP 99302317 A 19990325; DE 69907795 T 19990325