WO1996038768B1 - Powder compositions suitable for a toner - Google Patents
Powder compositions suitable for a tonerInfo
- Publication number
- WO1996038768B1 WO1996038768B1 PCT/GB1996/001305 GB9601305W WO9638768B1 WO 1996038768 B1 WO1996038768 B1 WO 1996038768B1 GB 9601305 W GB9601305 W GB 9601305W WO 9638768 B1 WO9638768 B1 WO 9638768B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composition according
- refractory metal
- particulate
- composition
- metal oxide
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract 33
- 239000000843 powder Substances 0.000 title claims abstract 6
- 239000000463 material Substances 0.000 claims abstract 13
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract 13
- 150000004706 metal oxides Chemical class 0.000 claims abstract 13
- 239000003870 refractory metal Substances 0.000 claims abstract 13
- 229920001169 thermoplastic Polymers 0.000 claims abstract 9
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract 9
- 238000005273 aeration Methods 0.000 claims abstract 6
- 239000012530 fluid Substances 0.000 claims abstract 3
- 238000009491 slugging Methods 0.000 claims abstract 3
- 239000007787 solid Substances 0.000 claims abstract 3
- 229920001225 Polyester resin Polymers 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 230000001747 exhibiting Effects 0.000 claims 2
- 239000000314 lubricant Substances 0.000 claims 2
- 239000002245 particle Substances 0.000 claims 2
- 239000004645 polyester resin Substances 0.000 claims 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000006087 Silane Coupling Agent Substances 0.000 claims 1
- 238000005056 compaction Methods 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
Abstract
Powder compositions which exhibit fluid properties when subjected to mechanical agitation or aeration settle as a compacted solid when agitation/aeration ceases. The compositions exhibit behaviour substantially free of slugging, channelling and jetting when aerated. Typical are toner compositions comprising particulate synthetic thermoplastic material with at least one refractory metal oxide.
Claims
1. A powder toner composition comprising a particulate synthetic thermoplastic material and a particulate refractory metal oxide and a secondary refractory metal oxide, wherein the particulate synthetic thermoplastic material is surface coated with the particulate and secondary refractory metal oxides and at least one of the primary and secondary refractory metal oxides is surface-treated.
2. A powder composition which exhibits fluid properties when subjected to mechanical agitation or aeration and which settles as a compacted solid when the agitation or aeration ceases, said composition exhibiting behaviour substantially free of slugging, channelling and jetting when aerated.
3. A composition according to claim 1, which exhibits fluid properties when subjected to mechanical agitation or aeration and which settles as a compacted solid when the agitation or aeration ceases, said composition exhibiting behaviour substantially free of slugging, channelling and jetting when aerated.
4 A composition according to claim 2, formulated as a toner for use in electrostatic reproduction apparatus.
5. A composition according to claim 4, comprising a particulate synthetic thermoplastic material blended with a particulate refractory metal oxide material.
6. A composition according to claim 5, wherein the particulate refractory metal oxide material comprises a primary refractory oxide and a secondary refractory metal oxide.
7. A composition according to any preceding claim, wherein the surface-treated refractory metal oxide is surface coated with a silane coupling agent.
8. A composition according to any of claims 1, 3, 6 or 7, wherein the primary refractory metal oxide is a silica.
9. A composition according to any one of claims 1, 3 or 6 to 8, wherein the secondary refractory metal oxide is selected from titanium dioxide and alumina.
10. A composition according to any of claims 1, 3 or 6 to 9, wherein the amounts of the primary and secondary refractory metal oxides are independently selected from the range from 0.05 to 5.0% by weight of the total composition.
11. A composition according to any of claims 1, 3 or 6 to 10, wherein the particles of refractory metal oxide material have a d50 mean particle diameter of less than 1 micron.
12. A composition according to any of claims 1, 3 or 6 to 11, wherein the particulate thermoplastic material comprises a polyester resin.
13. A composition according to claim 12, wherein the polyester resin has at least one hydroxyl functional group.
14. A composition according to any of claims 1, 3 or 5 to 13, wherein the composition comprises a magnetizable material and at least 60% by weight of the particulate thermoplastic material.
15. A composition according to any of claims 1, 3 or 5 to 13, comprising at least 85% by weight of the particulate thermoplastic material.
16. A composition according to any of claims 1, 3 or 5 to 14, comprising no more than 98% by weight of the particulate thermoplastic material.
17. A composition according to any of claims 1, 3 or 5 to 16, wherein the particulate thermoplastic material has a dielectric constant of no more than 10.
18. A composition according to any preceding claim, comprising a charge control agent.
19. A composition according to any preceding claim, wherein the amount of the charge control agent is from 0.5 to 5% by weight of the total composition.
20. A composition according to any preceding claim, comprising a powder lubricant.
21. A composition according to any preceding claim, wherein the amount of powder lubricant is no more than 1% by weight of the total composition.
22. A composition according to any preceding claim, having a compaction ratio of at least 3:2.
23. A composition according to any preceding claim, having a viscosity of from 1 to 8 centipoise.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/973,048 US6045960A (en) | 1995-06-02 | 1996-06-03 | Powder composition suitable for a toner |
| EP96919950A EP0829037B1 (en) | 1995-06-02 | 1996-06-03 | Powder compositions suitable for a toner |
| DE69611446T DE69611446T2 (en) | 1995-06-02 | 1996-06-03 | POWDER COMPOSITIONS FOR USE AS TONER |
| AU58412/96A AU5841296A (en) | 1995-06-02 | 1996-06-03 | Powder compositions suitable for a toner |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9511150.6A GB9511150D0 (en) | 1995-06-02 | 1995-06-02 | Powder compositions |
| GB9511150.6 | 1995-06-02 | ||
| GB9609515.3 | 1996-05-07 | ||
| GBGB9609515.3A GB9609515D0 (en) | 1995-06-02 | 1996-05-07 | Powder composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1996038768A1 WO1996038768A1 (en) | 1996-12-05 |
| WO1996038768B1 true WO1996038768B1 (en) | 1997-01-23 |
Family
ID=26307146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1996/001305 WO1996038768A1 (en) | 1995-06-02 | 1996-06-03 | Powder compositions suitable for a toner |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6045960A (en) |
| EP (1) | EP0829037B1 (en) |
| AU (1) | AU5841296A (en) |
| DE (1) | DE69611446T2 (en) |
| GB (1) | GB9609515D0 (en) |
| WO (1) | WO1996038768A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6248492B1 (en) * | 1996-12-24 | 2001-06-19 | Xeikon Nv | Method for electrostatographically producing master images for decoration of ceramic objects |
| US6251555B1 (en) | 1998-04-17 | 2001-06-26 | Toda Kogyo Corporation | Black magnetic composite particles for black magnetic toner and black magnetic toner using the same |
| US6130017A (en) * | 1998-04-20 | 2000-10-10 | Toda Kogyo Corporation | Black non-magnetic composite particles for black toner and black toner using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4943506A (en) * | 1987-10-19 | 1990-07-24 | Minolta Camera Kabushiki Kaisha | White toner comprising titanium oxide of specified size |
| US5532100A (en) * | 1991-01-09 | 1996-07-02 | Moore Business Forms, Inc. | Multi-roller electrostatic toning |
| US5272040A (en) * | 1991-04-09 | 1993-12-21 | Minolta Camera Kabushiki Kaisha | Toner for developing electrostatic latent images |
| US5866286A (en) * | 1993-04-16 | 1999-02-02 | Moore Business Forms, Inc. | Color selection by mixing primary toners |
-
1996
- 1996-05-07 GB GBGB9609515.3A patent/GB9609515D0/en active Pending
- 1996-06-03 AU AU58412/96A patent/AU5841296A/en not_active Abandoned
- 1996-06-03 US US08/973,048 patent/US6045960A/en not_active Expired - Fee Related
- 1996-06-03 WO PCT/GB1996/001305 patent/WO1996038768A1/en not_active Application Discontinuation
- 1996-06-03 DE DE69611446T patent/DE69611446T2/en not_active Revoked
- 1996-06-03 EP EP96919950A patent/EP0829037B1/en not_active Revoked
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