US 7,018,760 B2 · Ceramic toner for electro-photographic printing

Abstract

A ceramic toner which is transferable to a high-temperature resistant glass, glass ceramic or ceramic substrate by electrophotographic printing and which can be fired in a subsequent temperature process, containing color pigment particles in addition to special glass flow particles. According to this invention, the ceramic toner has a thermoplastic synthetic matrix which melts in a homogeneous manner on the substrate within a temperature range of 100° C.–400° C. and which, within the temperature range of 300° C.–500° C., vaporizes in an almost residue-free manner and/or decomposes in order to obtain a toner which can be transferred especially in a direct printing mode and which has almost no synthetic matrix residue after firing.

A ceramic toner which can be transferred by an electro-photographic printing to a glass, a glass-ceramic or a ceramic substrate having a high temperature resistance and which can be baked on during a subsequent temperature process, and which contains color pigment particles, in addition to glass flux particles, wherein the ceramic toner has:

>30 to 80 weight-%, of a special glass frit,
and 0 to <20 weight-% of inorganic pigments, and 20 to 60 weight-% of a plastic matrix, the ceramic toner comprising:
a glass flux having a composition composed from a list of compositions 1–12, the compositions 1–12 being:
Glass
Glass
Glass
Composition 1
Composition 2
Composition 3
Gew.- %
Gew.- %
Gew.- %
Li2O
0 . . . 6.0
0 . . . 5.0
2.0 . . . 4.0
Na2O
0 . . . 5.0
0 . . . 5.0
5.0 . . . 9.5
K2O
0 . . . 2.0
0 . . . 2.5
1.5 . . . 4.0
MgO
0 . . . 4.0
0 . . . 3.0
0 . . . 0.5
CaO
0 . . . 4.0
0 . . . 4.0
0.0 . . . 0.1
SrO
0 . . . 4.0
0 . . . 4.0
BaO
0 . . . 1.0
0 . . . 4.0
ZnO
0 . . . 4.0
0 . . . 4.0
B2O3
13.0 . . . 23.0
15.0 . . . 27.0
13.0 . . . 20.0
Al2O3
3.0 . . . 10.0
7.0 . . . 20.0
5.0 . . . 10.0
Bi2O3
0 . . . 2.5
0 . . . 2.5
La2O3
0 . . . 3
0 . . . 0.9
SiO2
50.0 . . . 65.0
43.0 . . . 58.0
41.0 . . . 59.0
TiO2
0 . . . 4.0
0 . . . 3.0
ZrO2
0 . . . 4.0
0 . . . 4.0
2.0 . . . 5.5
SnO2
0 . . . 2.0
0 . . . 2.0
P2O5
0 . . . 1.5
0 . . . 2.5
Sb2O3
0 . . . 2.0
0 . . . 2.5
F
0 . . . 4.0
0 . . . 3.0
0 . . . 4.0
SO3
Fe2O3
Y2O3
CeO2
PbO
Further
Rare
Earth
Metal
Oxides
CdO
Tg (° C.)
400 . . . 650
450 . . . 650
Ew (° C.)
580 . . . 830
600 . . . 850
VA
840 . . . 1100
880 . . . 1150
(° C.)
α20–700° C.
α20–700° C.
(10−6K) < 2.0
(10−6K)
α20–300° C.
3.5–7.0
(10−6K)
3.5–8.0
Glass
Glass
Glass
Composition 4
Composition 5
Composition 6
Gew.- %
Gew.- %
Gew.- %
Li2O
0 . . . 2.0
0 . . . 3.0
0.1 . . . 1.5
Na2O
0 . . . 5.0
0 . . . 2.5
7.0 . . . 13.0
K2O
0 . . . 5.0
0 . . . 8.0
0 . . . 1.5
MgO
0 . . . 0.5
0 . . . 8.5
CaO
0 . . . 1.0
0.5 . . . 4.0
SrO
BaO
0 . . . 28.0
2.0 . . . 4.0
ZnO
0 . . . 10.0
1.0 . . . 15.0
B2O3
1.0 . . . 10.0
4.0 . . . 26.0
17.0 . . . 22.0
Al2O3
0.5 . . . 10.0
2.5 . . . 18.0
4.0 . . . 8.0
Bi2O3
La2O3
SiO2
20.0 . . . 45.0
40.0 . . . 62.0
55.0 . . . 65.0
TiO2
0 . . . 0.5
0 . . . 2.0
ZrO2
0 . . . 1.0
0 . . . 2.5
SnO2
0 . . . 3.0
P2O5
Sb2O3
F
0 . . . 3.5
SO3
Fe2O3
Y2O3
CeO2
0 . . . 10.0
PbO
20.0 . . . 60.0
Further
Rare
Earth
Metal
Oxides
CdO
0 . . . 1.5
Tg (° C.)
Ew (° C.)
VA
(° C.)
Glass
Glass
Glass
Composition 7
Composition 8
Composition 9
Gew.- %
Gew.- %
Gew.- %
Li2O
2.0 . . . 5.0
0 . . . 7.0
2.0 . . . 5.0
Na2O
1.0 . . . 2.5
2.0 . . . 8.0
5.0 . . . 10.0
K2O
1.0 . . . 3.0
0 . . . 5.0
MgO
0 . . . 1.5
0 . . . 2.0
CaO
0 . . . 3.0
1.0 . . . 7.0
SrO
0 . . . 3.0
0 . . . 2.0
BaO
0 . . . 4.0
ZnO
0 . . . 1.0
2.0 . . . 10.0
7.0 . . . 13.0
B2O3
10.0 . . . 20.0
20.0 . . . 32.0
14.0 . . . 26.0
Al2O3
5.0 . . . 10.0
1.0 . . . 15.0
4.0 . . . 16.0
Bi2O3
0 . . . 10.0
La2O3
SiO2
60.0 . . . 70.0
24.0 . . . 40.0
30.0 . . . 50.0
TiO2
0 . . . 2.0
0 . . . 4.0
ZrO2
0 . . . 2.0
0 . . . 3.0
SnO2
P2O5
Sb2O3
F
0 . . . 3.0
SO3
Fe2O3
Y2O3
CeO2
PbO
Further
Rare
Earth
Metal
Oxides
CdO
Tg (° C.)
Ew (° C.)
VA
(° C.)
Glass
Glass
Glass
Composition
Composition
Composition
10
11
12
Gew.- %
Gew.- %
Gew.- %
Li2O
2.5 . . . 4
0.9 . . . 7.4
Na2O
3.0 . . . 10.0
2.7 . . . 7.4
1.6 . . . 8.2
K2O
2.9 . . . 8.0
0.5 . . . 6.1
MgO
0 . . . 2.0
0 . . . 0.5
0 . . . 4.0
CaO
2.0 . . . 5.0
0 . . . 0.5
0.4 . . . 4.5
SrO
0 . . . 4.0
BaO
0.5 . . . 3.0
0 . . . 0.5
ZnO
6.0 . . . 13.0
0 . . . 1.5
0.4 . . . 3.8
B2O3
20.0 . . . 40.0
14.5 . . . 18.5
11.0 . . . 36.4
Al2O3
3.0 . . . 5.0
2.0 . . . 14.6
Bi2O3
La2O3
0 . . . 3.0
SiO2
45.0 . . . 70.0
53.0 . . . 70.0
28.0 . . . 69.0
TiO2
0 . . . 20
0 . . . 0.5
0 . . . 6.0
ZrO2
5.5 . . . 13.5
1.3 . . . 20.6
SnO2
P2O5
0 . . . 0.5
0 . . . 10.0
Sb2O3
0 . . . 0.5
F
0 . . . 4.0
0 . . . 8.0
SO3
0 . . . 0.5
Fe2O3
0 . . . 0.5
Y2O3
0 . . . 0.5
0 . . . 1.0
CeO2
0 . . . 0.5
PbO
0 . . . 2.0
0 . . . 1.5
Further
0 . . . 1.0
Rare
Earth
Metal
Oxides
CdO
Tg (° C.)
470 . . . 610
Ew (° C.)
VA
(° C.)
α20–300° C.
(10−6 K)
5.0 . . . 8.0.

355 more elements

Ceramic toner for electro-photographic printing

Life of this patent

Ceramic toner for electro-photographic printing

Life of this patent

Abstract

Claims25