Global Patent Index - EP 1076267 A1

EP 1076267 A1 2001-02-14 - Black magnetic toner and black magnetic composite particles therefor

Title (en)

Black magnetic toner and black magnetic composite particles therefor

Title (de)

Schwarzer magnetischer Toner und hierzu verwendete schwarze magnetische Teilchenzusammensetzung

Title (fr)

Révélateur magnétique noir et composition de particules magnétiques noires, utilisée dans ce révélateur

Publication

EP 1076267 A1 (EN)

Application

EP 00306840 A

Priority

  • JP 22782599 A
  • JP 2000131865 A

Abstract (en)

A black magnetic toner comprises a binder resin and black magnetic composite particles having an average particle diameter of 0.06 to 1.0 mu m and comprising: (a) magnetic iron oxide particles; (b) a coating layer on the surface of said magnetic iron oxide particles, comprising at least one organosilicon compound selected from: (1) organosilane compounds obtainable from alkoxysilane compounds, and (2) polysiloxanes or modified polysiloxanes; and (c) a carbon black coat which is provided on said coating layer in an amount of 26 to 55 parts by weight per 100 parts by weight of said magnetic iron oxide particles.

IPC 1-7 (main, further and additional classification)

G03G 9/09; G03G 9/083; G03G 9/087

IPC 8 full level (invention and additional information)

C01G 49/06 (2006.01); C01G 49/08 (2006.01); G03G 9/083 (2006.01); G03G 9/087 (2006.01); G03G 9/09 (2006.01)

CPC (invention and additional information)

G03G 9/0839 (2013.01); G03G 9/083 (2013.01); G03G 9/0833 (2013.01); G03G 9/0836 (2013.01); G03G 9/08773 (2013.01); G03G 9/0902 (2013.01); G03G 9/0904 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE FR GB LU NL

EPO simple patent family

EP 1076267 A1 20010214; JP 2001114522 A 20010424

INPADOC legal status


2006-08-23 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060301

2001-10-31 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB LU NL

2001-04-25 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010131

2001-02-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB LU NL

2001-02-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI