US20010042493A1 - Dispersions containing pyrogenic oxides - Google Patents
Dispersions containing pyrogenic oxides Download PDFInfo
- Publication number
- US20010042493A1 US20010042493A1 US09/829,014 US82901401A US2001042493A1 US 20010042493 A1 US20010042493 A1 US 20010042493A1 US 82901401 A US82901401 A US 82901401A US 2001042493 A1 US2001042493 A1 US 2001042493A1
- Authority
- US
- United States
- Prior art keywords
- dispersion
- doped
- oxide
- pyrogenic oxide
- pyrogenic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/141—Preparation of hydrosols or aqueous dispersions
- C01B33/1415—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water
- C01B33/1417—Preparation of hydrosols or aqueous dispersions by suspending finely divided silica in water an aqueous dispersion being obtained
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
- C09D17/007—Metal oxide
Definitions
- the present invention is directed to dispersions, a process for preparing these dispersions and their use in the preparation of coating mixtures for inkjet media.
- dispersions for example water-based dispersions
- Aqueous dispersions can be used to prepare coating mixtures which are applied to paper or films.
- the coated films may then be printed using an inkjet printer.
- one objective is to obtain dispersions which are filled as highly as possible (high solids content) but with a low viscosity.
- the invention provides dispersions which are characterised in that they consist of a liquid phase, preferably water, and a solid phase.
- the solid phase consists of a pyrogenic oxide, doped using an aerosol, the BET surface area of which is between 5 and 600 m 2 /g.
- the pyrogenic oxide preferably comprises silica prepared by the method of flame hydrolysis or flame oxidation and which has been doped with one or more doping component(s).
- the doping component is an aluminium oxide, and doping is accomplished by the method of aerosol application, in which the amount of doped material is between 1 and 200,000 ppm and the doping component(s) are applied via a salt or a salt mixture.
- the solid phase in the dispersion should be present in a proportion by weight between 0.001 and 80 wt. %.
- the invention also provides a process for preparing chemical dispersions in which a pyrogenic oxide, doped using an aerosol, is introduced into a liquid, preferably water, in a proportion by weight of between 0.001 and 80 wt. %.
- a liquid preferably water
- 85 kg/h of SiCl 4 are evaporated, mixed with 51 Nm 3 /h of hydrogen and with 70 Nm 3 /h of a nitrogen/oxygen mixture (containing 35 vol. % O 2 , remainder N 2 ) and fed into the central tube in the burner.
- the gas mixture flows out of a nozzle and bums in a water-cooled combustion chamber.
- 4 Nm 3 /h of (jacket) hydrogen flows out of the jacket nozzle which surrounds the central nozzle, in order to avoid incrustations.
- 70 Nm 3 /h of secondary air are also introduced into the combustion chamber.
- An aerosol flows into the central tube out of an axial tube located therein.
- the aerosol is produced by atomising a 15% aqueous AlCl 3 solution using a two-fluid nozzle.
- An aerosol flow of 1 kg/h (aqueous salt solution) is produced in which a carrier gas stream of 16 Nm 3 /h of air conveys the aerosol through a heating section.
- the air/aerosol gas mixture then enters the central tube from the axial tube at about 180° C.
- the aerosol is burned together with the air/SiCl 4 mixture.
- the reaction gases and the pyrogenically prepared silica doped with aluminium oxide are removed under suction through a cooling system, and cooled by applying a reduced pressure.
- the solid material (doped pyrogenic oxide) is separated from the gas stream in a filter or a cyclone.
- the doped pyrogenically prepared silica is produced as a white, finely divided powder. Adhering residues of hydrochloric acid are removed by treatment at elevated temperature with air which contains water vapour.
- the pyrogenic silicon dioxide doped using an aerosol has the following physico-chemical characteristics: BET: 60 m 2 /g pH (4% aqu. disp.): 3.9 Compacted bulk density: 142 g/l Chloride content: 180 ppm Al 2 O 3 content 0.19 wt. % DBP absorption: 73 g/100 g
- An aqueous dispersion is prepared with the doped pyrogenic oxide.
- a commercially available Aerosils pyrogenically prepared silica provided by Degussa-Hüls AG/Frankfurt, OX 50 and Aerosil 90, are used as comparison examples.
- Table 1 gives the characteristics of the oxides: TABLE 1 Physico-chemical characteristics of the doped pyrogenic oxide Doped pyrogenic oxide according to example OX 50 Aerosil 90 BET m 2 /g 60 50 90 pH (4% aqu. disp.) 3.9 3.8-4.8 3.7-4.7 Compacted bulk density 142 130 80 g/l Chloride content 180 ⁇ 250 ⁇ 250 ppm Al 2 O 3 content wt. % 0.19 ⁇ 0.08 0.05 SiO 2 content wt. % 99.8 >99.8 >99.8
- the viscosity of the dispersions prepared in this way is measured after 2 h with a Brookfield viscometer. TABLE 2 Viscosity of the 40% aqueous dispersion
- Doped pyrogenic Aerosil 90 oxide according not possible to prepare a 40% to example 1 OX 50 dispersion using Ultra-Turrax 5 rpm 2420 2320 >10,000 l0 rpm 1520 1320 20 rpm 970 745 50 rpm 554 372 100 rpm 370 256
- Inkjet coating mixtures are prepared from these 40% aqueous dispersions.
- Dispersion B is a 10% (with respect to PVA) aqueous dispersion of polyvinyl alcohol (solid, abbreviated as PVA), Mowiol 26-88 from the Clariant Co.
- PVA polyvinyl alcohol
- the two dispersions A and B are combined over the course of 10 minutes by stirring at 500 rpm with a dissolver disc to give a dispersion C.
- Dispersions A and B are mixed in such a way that a ratio by weight of Aerosil (or doped pyrogenic oxide) to PVA of 100:20 is produced in subsequent dispersion C. In the case of a 40% dispersion A, this is mixed with dispersion B in the ratio by weight of 1.25:1 in order to achieve the required ratio by weight (100:20 for the solids).
- These coating mixtures are applied to an untreated polyester film (thickness 100 micrometers) with the aid of a shaped spreading rod.
- the wet film thickness of the coating mixture is 120 micrometers.
- the coating is dried at 105° C. for 8 minutes. The also very good.
- dispersions made with Aerosil OX 50 also have a relatively low viscosity, the print quality of the coating mixtures, or coatings, prepared therefrom is not acceptable.
Abstract
Dispersions of pyrogenic oxides, doped using an aerosol, are prepared by mixing the oxide with a suspending agent and milling. The dispersions can be used to prepare inkjet paper.
Description
- The present application claims priority to Europen application 00107817.9 filed on Apr. 12, 2000, the subject matter of which is hereby incorporated by reference.
- The present invention is directed to dispersions, a process for preparing these dispersions and their use in the preparation of coating mixtures for inkjet media.
- It is known that dispersions, for example water-based dispersions, can be prepared from pyrogenically prepared oxides. Aqueous dispersions can be used to prepare coating mixtures which are applied to paper or films. The coated films may then be printed using an inkjet printer. In this case, one objective is to obtain dispersions which are filled as highly as possible (high solids content) but with a low viscosity.
- The invention provides dispersions which are characterised in that they consist of a liquid phase, preferably water, and a solid phase. The solid phase consists of a pyrogenic oxide, doped using an aerosol, the BET surface area of which is between 5 and 600 m2/g. The pyrogenic oxide preferably comprises silica prepared by the method of flame hydrolysis or flame oxidation and which has been doped with one or more doping component(s). Preferably the doping component is an aluminium oxide, and doping is accomplished by the method of aerosol application, in which the amount of doped material is between 1 and 200,000 ppm and the doping component(s) are applied via a salt or a salt mixture. The solid phase in the dispersion should be present in a proportion by weight between 0.001 and 80 wt. %.
- The invention also provides a process for preparing chemical dispersions in which a pyrogenic oxide, doped using an aerosol, is introduced into a liquid, preferably water, in a proportion by weight of between 0.001 and 80 wt. %. This dispersion is then that patent, 85 kg/h of SiCl4 are evaporated, mixed with 51 Nm3/h of hydrogen and with 70 Nm3/h of a nitrogen/oxygen mixture (containing 35 vol. % O2, remainder N2) and fed into the central tube in the burner. The gas mixture flows out of a nozzle and bums in a water-cooled combustion chamber. 4 Nm3/h of (jacket) hydrogen flows out of the jacket nozzle which surrounds the central nozzle, in order to avoid incrustations. 70 Nm3/h of secondary air are also introduced into the combustion chamber.
- An aerosol flows into the central tube out of an axial tube located therein. The aerosol is produced by atomising a 15% aqueous AlCl3 solution using a two-fluid nozzle. An aerosol flow of 1 kg/h (aqueous salt solution) is produced in which a carrier gas stream of 16 Nm3/h of air conveys the aerosol through a heating section. The air/aerosol gas mixture then enters the central tube from the axial tube at about 180° C. The aerosol is burned together with the air/SiCl4 mixture. The reaction gases and the pyrogenically prepared silica doped with aluminium oxide are removed under suction through a cooling system, and cooled by applying a reduced pressure. The solid material (doped pyrogenic oxide) is separated from the gas stream in a filter or a cyclone.
- The doped pyrogenically prepared silica is produced as a white, finely divided powder. Adhering residues of hydrochloric acid are removed by treatment at elevated temperature with air which contains water vapour. The pyrogenic silicon dioxide doped using an aerosol has the following physico-chemical characteristics:
BET: 60 m2/g pH (4% aqu. disp.): 3.9 Compacted bulk density: 142 g/l Chloride content: 180 ppm Al2O3 content 0.19 wt. % DBP absorption: 73 g/100 g - An aqueous dispersion is prepared with the doped pyrogenic oxide. A commercially available Aerosils (pyrogenically prepared silica) provided by Degussa-Hüls AG/Frankfurt, OX 50 and Aerosil 90, are used as comparison examples.
- Table 1 gives the characteristics of the oxides:
TABLE 1 Physico-chemical characteristics of the doped pyrogenic oxide Doped pyrogenic oxide according to example OX 50 Aerosil 90 BET m2/g 60 50 90 pH (4% aqu. disp.) 3.9 3.8-4.8 3.7-4.7 Compacted bulk density 142 130 80 g/l Chloride content 180 <250 <250 ppm Al2O3 content wt. % 0.19 <0.08 0.05 SiO2 content wt. % 99.8 >99.8 >99.8 - An aqueous dispersion is prepared using these three different pyrogenic oxides. This is achieved using a rotor-stator system (Ultra-Turrax™) with a dispersion time of 30 minutes in a double-walled vessel with water cooling. It is attempted to prepare a 40% (with respect to solids) dispersion (w=0.40). This dispersion may also be prepared using other equipment, e.g., ball mills or pearl mills or various types of jet or high-pressure mills (jets of liquid directed towards each other). It is shown that it is not possible to produce a 40% dispersion with Aerosil 90 using this system because the system is too highly viscous. The viscosity of the dispersions prepared in this way (doped oxide and Aerosil OX 50) is measured after 2 h with a Brookfield viscometer.
TABLE 2 Viscosity of the 40% aqueous dispersion Doped pyrogenic Aerosil 90: oxide according not possible to prepare a 40% to example 1 OX 50 dispersion using Ultra-Turrax 5 rpm 2420 2320 >10,000 l0 rpm 1520 1320 20 rpm 970 745 50 rpm 554 372 100 rpm 370 256 - Inkjet coating mixtures are prepared from these 40% aqueous dispersions. Formulation for preparing an inkjet coating mixture is as follows. Two dispersions, A and B, are prepared. Dispersion A is a 40% (w=0.40 ) aqueous dispersion which contains the pyrogenic oxide (or the doped pyrogenic oxide). This is made by dispersing the pyrogenic oxide or doped oxide for 30 minutes with an Ultra-Turrax system in a water-cooled double-jacket system.
- Dispersion B is a 10% (with respect to PVA) aqueous dispersion of polyvinyl alcohol (solid, abbreviated as PVA), Mowiol 26-88 from the Clariant Co. The two dispersions A and B are combined over the course of 10 minutes by stirring at 500 rpm with a dissolver disc to give a dispersion C. Dispersions A and B are mixed in such a way that a ratio by weight of Aerosil (or doped pyrogenic oxide) to PVA of 100:20 is produced in subsequent dispersion C. In the case of a 40% dispersion A, this is mixed with dispersion B in the ratio by weight of 1.25:1 in order to achieve the required ratio by weight (100:20 for the solids). Furthermore (if required) enough water is added to produce a 24% dispersion C, with respect to the sum of the solids (progenic oxide+ PVA). The viscosity of this dispersion C, the inkjet coating mixture, is measured after 24 h using a Brookfield viscometer.
TABLE 3 Viscosity of the coating mixture measured after 24 h Doped oxide according to example 1 OX 50 Aerosil 90 Solids content of the 24 24 22.5 coating mixture (pyrogenic oxide + PVA) wt. % Viscosity [mPas] 3244 685 3352 at 100 rpm - (Note: In the case of preparing the coating mixture from Aerosil 90, a 30% aqueous dispersion is used initially.)
- These coating mixtures are applied to an untreated polyester film (thickness 100 micrometers) with the aid of a shaped spreading rod. The wet film thickness of the coating mixture is 120 micrometers. The coating is dried at 105° C. for 8 minutes. The also very good. Although dispersions made with Aerosil OX 50 also have a relatively low viscosity, the print quality of the coating mixtures, or coatings, prepared therefrom is not acceptable.
Claims (18)
1. A dispersion comprising a liquid phase and a solid phase, wherein the solid phase comprises a pyrogenic oxide, and wherein said pyrogenic oxide:
a) is doped with one or more doping components; and
b) has a BET surface area of between 5 and 600 m2/g.
2. The dispersion of , wherein said pyrogenic oxide is silica.
claim 1
3. The dispersion of , wherein said liquid phase is water.
claim 1
4. The dispersion of any one of claims 1-3, wherein said pyrogenic oxide is prepared by the method of flame hydrolysis or flame oxidation.
5. The dispersion of any one of claims 1-3, wherein said pyrogenic oxide is doped using an aerosol.
6. The dispersion of any one of claims 1-3, wherein said pyrogenic oxide is doped with aluminum oxide.
7. The dispersion of any one of claims 1-3, wherein the amount of doped material in said pyrogenic oxide is between 1 and 200,000 ppm.
8. The dispersion of , wherein the amount of doped material in said pyrogenic oxide is between 1 and 200,000 ppm.
claim 6
9. The dispersion of , wherein said doped material is applied as a salt or a salt mixture.
claim 8
10. The dispersion of any one of claims 1-3, wherein the solid phase in the dispersion is present in a proportion by weight of between 0.001 and 80 wt. %.
11. The dispersion of , wherein the solid phase in the dispersion is present in a proportion by weight of between 0.001 and 80 wt. %.
claim 6
12. A process for preparing a dispersion according to , comprising:
claim 1
a) mixing a doped pyrogenic oxide with a liquid; and
b) milling the mixture produced in step a).
13. The process of , wherein said liquid is water and said pyrogenic oxide is silica.
claim 12
14. The process of , wherein said pyrogenic oxide is present in said liquid in a proportion by weight of between 0.001 and 80 wt. %.
claim 12
15. The process of , wherein said milling procedure is performed using an ball mill.
claim 12
16. The process of , wherein said milling procedure is performed using a pearl mill.
claim 12
17. The process of , wherein said milling procedure is performed using a high pressure milling mixture.
claim 12
18. A coating mixture for an inkjet paper or inkjet film comprising the dispersion of .
claim 1
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/295,895 US6695907B2 (en) | 2000-04-12 | 2002-11-18 | Dispersions containing pyrogenic oxides |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00107817.9A EP1148026B1 (en) | 2000-04-12 | 2000-04-12 | Dispersions |
EP00107817.9 | 2000-04-12 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/295,895 Continuation US6695907B2 (en) | 2000-04-12 | 2002-11-18 | Dispersions containing pyrogenic oxides |
Publications (1)
Publication Number | Publication Date |
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US20010042493A1 true US20010042493A1 (en) | 2001-11-22 |
Family
ID=8168436
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/829,014 Abandoned US20010042493A1 (en) | 2000-04-12 | 2001-04-10 | Dispersions containing pyrogenic oxides |
US10/295,895 Expired - Lifetime US6695907B2 (en) | 2000-04-12 | 2002-11-18 | Dispersions containing pyrogenic oxides |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US10/295,895 Expired - Lifetime US6695907B2 (en) | 2000-04-12 | 2002-11-18 | Dispersions containing pyrogenic oxides |
Country Status (12)
Country | Link |
---|---|
US (2) | US20010042493A1 (en) |
EP (1) | EP1148026B1 (en) |
JP (1) | JP3909217B2 (en) |
KR (1) | KR100459963B1 (en) |
BR (1) | BR0101455A (en) |
CA (1) | CA2343831C (en) |
IL (1) | IL142506A0 (en) |
NO (1) | NO333429B1 (en) |
PL (1) | PL347019A1 (en) |
SG (1) | SG94804A1 (en) |
TW (1) | TW527317B (en) |
ZA (1) | ZA200103011B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020121156A1 (en) * | 2001-02-22 | 2002-09-05 | Degussa Ag | Aqueous dispersion, process for its production and use |
US20030095905A1 (en) * | 2001-07-20 | 2003-05-22 | Thomas Scharfe | Pyrogenically produced aluminum-silicon mixed oxides |
US20030150838A1 (en) * | 2002-02-07 | 2003-08-14 | Degussa Ag | Dispersion for chemical mechanical polishing |
US6676719B2 (en) | 2000-12-23 | 2004-01-13 | Degussa Ag | Aqueous dispersion, a process for the preparation and the use thereof |
WO2004089816A1 (en) * | 2003-04-14 | 2004-10-21 | Degussa Ag | Process for the production of metal oxide and metalloid oxide dispersions |
WO2006002085A1 (en) | 2004-06-15 | 2006-01-05 | W. R. Grace & Co.-Conn. | Chemically assisted milling of silicas |
WO2006002773A1 (en) * | 2004-07-01 | 2006-01-12 | Degussa Ag | Silicon dioxide dispersion comprising polyol |
US20080045411A1 (en) * | 2002-12-17 | 2008-02-21 | Degussa Ag | Pyrogenic Silicon Dioxide and a Dispersion Thereof |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001316115A (en) * | 2000-03-28 | 2001-11-13 | Degussa Ag | Doping-processed titanium dioxide |
DE10123950A1 (en) * | 2001-05-17 | 2002-11-28 | Degussa | Granules based on pyrogenic silicon dioxide doped with aluminum oxide by means of aerosol, process for their production and their use |
DE10258858A1 (en) * | 2002-12-17 | 2004-08-05 | Degussa Ag | Fumed silica |
DE10320854A1 (en) * | 2003-05-09 | 2004-12-09 | Degussa Ag | Dispersion for chemical mechanical polishing |
DE102004010756A1 (en) * | 2004-03-05 | 2005-09-22 | Degussa Ag | Silanized silicas |
WO2005108294A2 (en) * | 2004-05-04 | 2005-11-17 | Cabot Corporation | Method of preparing an aggregate metal oxide particle dispersion having a desired aggregate particle diameter |
US20060162497A1 (en) * | 2005-01-21 | 2006-07-27 | Cabot Corporation | Processes for forming nanoparticles in a flame spray system |
DE102006059315A1 (en) * | 2006-12-15 | 2008-06-19 | Evonik Degussa Gmbh | Process for the preparation of fumed silica dispersions |
US7989506B2 (en) * | 2007-04-04 | 2011-08-02 | Eastman Kodak Company | Method and apparatus for dispersion of high-surface-area, low-bulk-density fumed silica |
JP5566723B2 (en) * | 2010-03-01 | 2014-08-06 | 古河電気工業株式会社 | Fine particle mixture, active material aggregate, positive electrode active material, positive electrode, secondary battery, and production method thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2931585A1 (en) | 1979-08-03 | 1981-02-12 | Degussa | TEMPERATURE-STABILIZED, PYROGEN-PRODUCED ALUMINUM OXIDE MIXED OXIDE, THE METHOD FOR THE PRODUCTION AND USE THEREOF |
DE3132674C2 (en) | 1981-08-19 | 1983-12-08 | Degussa Ag, 6000 Frankfurt | Process for the production of compacts |
DE3803899C1 (en) * | 1988-02-09 | 1989-04-13 | Degussa Ag, 6000 Frankfurt, De | |
DE3803895C1 (en) * | 1988-02-09 | 1989-04-13 | Degussa Ag, 6000 Frankfurt, De | |
US5116535A (en) * | 1989-03-21 | 1992-05-26 | Cabot Corporation | Aqueous colloidal dispersion of fumed silica without a stabilizer |
DE4427574C2 (en) | 1994-08-04 | 1997-08-14 | Degussa | Compacts based on pyrogenically prepared silicon dioxide |
EP0725037B2 (en) | 1995-02-04 | 2012-04-25 | Evonik Degussa GmbH | Granules on the basis of pyrogenic silica, process for their preparation and use thereof |
US5827363A (en) * | 1995-12-19 | 1998-10-27 | Degussa Corporation | Structure precipitated silicates and silicas, production and use in ink jet printing |
DE19650500A1 (en) * | 1996-12-05 | 1998-06-10 | Degussa | Doped, pyrogenic oxides |
US6380265B1 (en) * | 1998-07-09 | 2002-04-30 | W. R. Grace & Co.-Conn. | Dispersion of fine porous inorganic oxide particles and processes for preparing same |
-
2000
- 2000-04-12 EP EP00107817.9A patent/EP1148026B1/en not_active Expired - Lifetime
-
2001
- 2001-03-16 TW TW090106268A patent/TW527317B/en not_active IP Right Cessation
- 2001-04-09 JP JP2001110419A patent/JP3909217B2/en not_active Expired - Fee Related
- 2001-04-10 IL IL14250601A patent/IL142506A0/en unknown
- 2001-04-10 SG SG200102083A patent/SG94804A1/en unknown
- 2001-04-10 US US09/829,014 patent/US20010042493A1/en not_active Abandoned
- 2001-04-11 NO NO20011872A patent/NO333429B1/en not_active IP Right Cessation
- 2001-04-11 CA CA002343831A patent/CA2343831C/en not_active Expired - Fee Related
- 2001-04-11 PL PL01347019A patent/PL347019A1/en not_active Application Discontinuation
- 2001-04-11 BR BR0101455-2A patent/BR0101455A/en not_active IP Right Cessation
- 2001-04-11 KR KR10-2001-0019259A patent/KR100459963B1/en not_active IP Right Cessation
- 2001-04-11 ZA ZA200103011A patent/ZA200103011B/en unknown
-
2002
- 2002-11-18 US US10/295,895 patent/US6695907B2/en not_active Expired - Lifetime
Cited By (20)
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US6676719B2 (en) | 2000-12-23 | 2004-01-13 | Degussa Ag | Aqueous dispersion, a process for the preparation and the use thereof |
US20020121156A1 (en) * | 2001-02-22 | 2002-09-05 | Degussa Ag | Aqueous dispersion, process for its production and use |
US7169322B2 (en) * | 2001-02-22 | 2007-01-30 | Degussa Ag | Aqueous dispersion, process for its production and use |
US20030095905A1 (en) * | 2001-07-20 | 2003-05-22 | Thomas Scharfe | Pyrogenically produced aluminum-silicon mixed oxides |
US7241336B2 (en) * | 2001-07-20 | 2007-07-10 | Degussa Gmbh | Pyrogenically produced aluminum-silicon mixed oxides |
US6905632B2 (en) | 2002-02-07 | 2005-06-14 | Degussa Ag | Dispersion for chemical mechanical polishing |
US20030150838A1 (en) * | 2002-02-07 | 2003-08-14 | Degussa Ag | Dispersion for chemical mechanical polishing |
KR100572138B1 (en) * | 2002-02-07 | 2006-04-19 | 데구사 아게 | Aqueous dispersion for chemical mechanical planarization, preparation method thereof and chemical mechanical planarization method using the dispersion |
US7722849B2 (en) * | 2002-12-17 | 2010-05-25 | Evonik Degussa Gmbh | Pyrogenic silicon dioxide and a dispersion thereof |
US20080045411A1 (en) * | 2002-12-17 | 2008-02-21 | Degussa Ag | Pyrogenic Silicon Dioxide and a Dispersion Thereof |
US20060104881A1 (en) * | 2003-04-14 | 2006-05-18 | Degussa Ag | Process for the produciton of metal oxide and metalloid oxide dispersions |
WO2004089816A1 (en) * | 2003-04-14 | 2004-10-21 | Degussa Ag | Process for the production of metal oxide and metalloid oxide dispersions |
US20110155951A1 (en) * | 2003-04-14 | 2011-06-30 | Evonik Degussa Gmbh | Process for the production of metal oxide and metalloid oxide dispersions |
US8529651B2 (en) | 2003-04-14 | 2013-09-10 | Evonik Degussa Gmbh | Process for the production of metal oxide and metalloid oxide dispersions |
WO2006002085A1 (en) | 2004-06-15 | 2006-01-05 | W. R. Grace & Co.-Conn. | Chemically assisted milling of silicas |
US20110094418A1 (en) * | 2004-06-15 | 2011-04-28 | David Monroe Chapman | Chemically assisted milling of silicas |
US20090261309A1 (en) * | 2004-07-01 | 2009-10-22 | Degussa Ag | Silicon dioxide dispersion comprising polyol |
WO2006002773A1 (en) * | 2004-07-01 | 2006-01-12 | Degussa Ag | Silicon dioxide dispersion comprising polyol |
CN1980861B (en) * | 2004-07-01 | 2012-08-29 | 赢创德固赛有限公司 | Silicon dioxide dispersion comprising polyol |
US8911638B2 (en) | 2004-07-01 | 2014-12-16 | Degussa Ag | Silicon dioxide dispersion comprising polyol |
Also Published As
Publication number | Publication date |
---|---|
KR20010100889A (en) | 2001-11-14 |
SG94804A1 (en) | 2003-03-18 |
CA2343831C (en) | 2006-06-13 |
ZA200103011B (en) | 2001-10-18 |
US20030118499A1 (en) | 2003-06-26 |
CA2343831A1 (en) | 2001-10-12 |
PL347019A1 (en) | 2001-10-22 |
NO333429B1 (en) | 2013-06-03 |
JP2002020650A (en) | 2002-01-23 |
JP3909217B2 (en) | 2007-04-25 |
EP1148026A1 (en) | 2001-10-24 |
US6695907B2 (en) | 2004-02-24 |
NO20011872D0 (en) | 2001-04-11 |
NO20011872L (en) | 2001-10-15 |
BR0101455A (en) | 2001-12-04 |
EP1148026B1 (en) | 2016-08-10 |
TW527317B (en) | 2003-04-11 |
IL142506A0 (en) | 2002-03-10 |
KR100459963B1 (en) | 2004-12-04 |
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