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 20000223 (EN)

Application

EP 99302317 A 19990325

Priority

JP 10013698 A 19980326

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 9/097; G03G 9/083

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)

[A] EP 0453261 A1 19911023 - TODA KOGYO CORP [JP]
[A] US 5324571 A 19940628 - KOYAMA NOBORU [JP], et al
[A] EP 0582472 A1 19940209 - TODA KOGYO CORP [JP]
[A] DATABASE WPI Section Ch Week 199020, Derwent World Patents Index; Class E05, AN 1990-152560, XP002124764
[A] PATENT ABSTRACTS OF JAPAN vol. 5, no. 21 (P - 048) 7 February 1981 (1981-02-07)

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