| (19) |
 |
|
(11) |
EP 0 913 735 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
20.10.1999 Bulletin 1999/42 |
| (43) |
Date of publication A2: |
|
06.05.1999 Bulletin 1999/18 |
| (22) |
Date of filing: 16.10.1998 |
|
| (51) |
International Patent Classification (IPC)6: G03G 9/087 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
31.10.1997 EP 97203377
|
| (71) |
Applicant: AGFA-GEVAERT N.V. |
|
2640 Mortsel (BE) |
|
| (72) |
Inventors: |
|
- Tavernier, Serge
2640 Mortsel (BE)
- Op de Beeck, Werner
2640 Mortsel (BE)
- de Meutter, Stefaan
2640 Mortsel (BE)
- Tersago, Geert
2640 Mortsel (BE)
|
|
| |
|
| (54) |
Toner particles containing a mixture of a modified linear polymer, a cross-linked
polymer and a wax |
(57) Dry toner particles with a resinous matrix containing a mixture of a polymer (LPC)
with low softening point and tgδ > 3, modified by a modifier (D) selected from the
group consisting of long chain aliphatic compounds with a reactive end group and having
between 20 and 250 carbon atoms and a polysiloxane, said modifier and said polymer
being present in a molar ratio LPC/D between 0.8 and 1.25 and a non-linear polymer
with a softening point T
sB such that 110 °C ≤ T
sB ≤ 135 °C. The toner particles further contain a wax chosen from waxes having a melting
point near to the softening point of the branched polymer B.