WO2006067127A1 - Aluminium oxide powder, dispersion and coating composition - Google Patents
Aluminium oxide powder, dispersion and coating composition Download PDFInfo
- Publication number
- WO2006067127A1 WO2006067127A1 PCT/EP2005/056936 EP2005056936W WO2006067127A1 WO 2006067127 A1 WO2006067127 A1 WO 2006067127A1 EP 2005056936 W EP2005056936 W EP 2005056936W WO 2006067127 A1 WO2006067127 A1 WO 2006067127A1
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- WIPO (PCT)
- Prior art keywords
- aluminium oxide
- oxide powder
- gamma
- dispersion
- content
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
- C01F7/302—Hydrolysis or oxidation of gaseous aluminium compounds in the gaseous phase
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
- C01P2004/12—Particle morphology extending in one dimension, e.g. needle-like with a cylindrical shape
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/50—Agglomerated particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Definitions
- the invention relates to an aluminium oxide powder and the preparation thereof .
- the invention furthermore relates to a dispersion comprising the aluminium oxide powder, and to a coating composition comprising this dispersion .
- EP-A-1256548 claims aluminium oxide particles which are either amorphous and/or contain the gamma, delta and theta modification and have an average primary particle size of from 5 to 100 nm and an average aggregate size of from 50 to 800 nm.
- the starting material for the preparation of these particles is aluminium chloride, which is obtained in an oxidative process at temperatures of from 500 °C to 1 , 300 °C in the presence of an oxidizing gas and water .
- it cannot be seen from EP-A-1256548 how the process is to be carried out in order to obtain a modification other than the gamma modification or an amorphous powder .
- the obj ect of the invention is furthermore to provide a dispersion which comprises this aluminium oxide powder .
- the obj ect of the invention is furthermore to provide a coating composition which comprises this aluminium oxide powder .
- the percentage data relate to the sum of the crystalline constituents .
- the contents of crystalline phases are determined by X-ray diffraction analysis . Other phases cannot be detected by means of this analytical method.
- the aluminium oxide powder according to the invention is in the form of aggregates of primary particles .
- the primary particles are not porous .
- the surfaces of these primary particles have hydroxyl groups .
- the BET surface area of the aluminium oxide powder according to the invention can be 30 to 70 m 2 /g, and particularly preferably 45 to 65 m 2 /g .
- the aluminium oxide powder according to the invention can also comprise amorphous aluminium oxide constituents .
- the content of amorphous aluminium oxide is preferably less than 5 wt . % and particularly preferably less than 2 wt . %, in each case based on the total amount of the aluminium oxide powder .
- the contents of amorphous aluminium oxide can be estimated from an X-ray diffraction diagram.
- An aluminium oxide powder according to the invention which has a BET surface area of 40 to 60 m 2 /g and a content of delta-aluminium oxide of 80 % to 90 % and a content of theta-aluminium oxide and/or gamma-aluminium oxide of 10 to 20 %, in each case based on the sum of the crystalline constituents , can be particularly advantageous .
- An aluminium oxide powder according to the invention which has a BET surface area of 70 to 90 m 2 /g and a content of delta-aluminium oxide of 30 % to 40 % and a content of theta-aluminium oxide of 0 to 5 % and a content of gamma- aluminium oxide of 60 % to 70 %, in each case based on the sum of the crystalline constituents , can furthermore be particularly advantageous .
- the aluminium oxide powder according to the invention has a hydroxyl group density of greater than 8 OH/nm 2 .
- a particularly good ease of incorporation of the powder into aqueous media is observed.
- a hydroxyl group density of from 9 to 12 OH/nm 2 is particularly advantageous .
- the tamped density of the powder according to the invention is 10 to 200 g/1.
- a range of from 35 to 135 g/1 may be particularly preferred.
- the powder according to the invention can be incorporated particularly readily into aqueous media .
- the present invention also provides a process in which - aluminium chloride is vaporized and the vapour is transferred into a mixing chamber by means of a carrier gas and separately from this , hydrogen, air (primary air) , which can optionally be enriched with oxygen and/or preheated, is transferred into the mixing chamber, subsequently the mixture of aluminium chloride vapour, hydrogen and air is ignited in a burner and the flame burns into a reaction chamber which is separated off from ambient air, secondary air is additionally introduced into the reaction chamber, the solid is then separated off from gaseous substances and is subsequently treated with steam and optionally air, wherein the ratio of primary air/secondary air is 0.01 to 2 , the exit speed v B of the reaction mixture from the burner is at least 10 m/s , the lambda value is 1 to 4 , - the gamma value is 1 to 3 and the value of gamma * v B / lambda is greater than or equal to 55.
- hydrogen, air primary air
- primary air primary air
- the process according to the invention is a flame hydrolysis process .
- the lambda values can be 1 to 2.5, the gamma values 1 to 2 and the values of gamma * v B / lambda 55 to 200.
- a ratio of primary air/secondary air which is between 0.15 and 1.5 can be chosen .
- the present invention also provides a dispersion comprising 10 to 60 wt . % of the aluminium oxide powder according to the invention .
- Suitable dispersing agents of the dispersion according to the invention are water and/or organic solvents , such as alcohols having 1 to 8 carbon atoms , in particular methanol, ethanol, n-propanol and i-propanol, butanol, octanol, cyclohexanol, ketones having 1 to 8 carbon atoms , in particular acetone, butanone and cyclohexanone, esters , in particular ethyl acetate and glycol esters , ethers , in particular diethyl ether, dibutyl ether, anisole, dioxane, tetrahydrofuran and tetrahydropyran, glycol ethers , in particular mono-, di-, tri- and polyglycol ethers , glycols , in particular ethylene glycol, diethylene glycol and propylene glycol, amides and other nitrogen compounds , in particular dimethylacetamide, dimethyl
- Particularly- preferred organic dispersing agents are ethanol, n- and i- propanol, ethylene glycol, hexane, heptane, toluene and o-, m- and p-xylene .
- Mixtures of the abovementioned compounds can also serve as dispersing agents , in which case these must be miscible and form only one phase .
- Water is a particularly preferred dispersing agent .
- the dispersion according to the invention can furthermore comprise substances for adjusting the pH, such as acids , bases or buffer systems , additives for stabilizing the dispersion, such as salts , surface-active substances , organic solvents , bactericides and/or fungicides .
- substances for adjusting the pH such as acids , bases or buffer systems
- additives for stabilizing the dispersion such as salts , surface-active substances , organic solvents , bactericides and/or fungicides .
- the dispersion according to the invention can be obtained by predispersing the aluminium oxide powder according to the invention in a dispersing agent, preferably water, and then dispersing it .
- a dispersing agent preferably water
- Dissolvers or toothed discs are suitable for the predispersing .
- Rotor-stator machines such as Ultra Turrax (IKA) , or those from Ystral, and furthermore bead mills or stirred bead mills are suitable for the dispersing .
- Higher energy inputs are possible with a planetary kneader/mixer . However, the efficiency of this system is associated with a sufficiently high viscosity of the processed mixture, in order to introduce the high shearing energies required for breaking up the particles .
- Dispersions having average aggregate diameters of less than 200 nm, preferably 70 to 150 mm can be obtained using high pressure homogenizers .
- two predispersed suspension streams under a high pressure are let down via a nozzle .
- the two dispersion j ets impinge exactly on one another and the particles grind themselves .
- the predispersion is likewise placed under a high pressure, but the collision of the particles takes place against armoured wall regions .
- the present invention also provides the use of the dispersion according to the invention for the preparation of ink j et recording media and for chemical-mechanical polishing .
- the invention also provides a coating composition which comprises the dispersion according to the invention and at least one binder, which is preferably hydrophilic .
- Binders which can be used are : polyvinyl alcohol, partly or completely saponified, and cationized polyvinyl alcohol with a primary, secondary or tertiary amino group or a tertiary ammonium group on the main chain or on the side chain .
- polyvinyl alcohols with one another and polyvinylpyrrolidone, polyvinyl acetates , silanized polyvinyl alcohols , styrene/acrylate latices , styrene/butadiene latices , melamine resins , ethylene/vinyl acetate copolymers , polyurethane resins , synthetic resins , such as polymethyl methacrylates , polyester resins (e . g . unsaturated polyester resins ) , polyacrylates , modified starch, casein, gelatine and/or cellulose derivatives (e . g . carboxymethylcellulose) .
- Polyvinyl alcohol or cationized polyvinyl alcohol can preferably be employed.
- the coating composition can furthermore also additionally comprise one or more other pigments , such as calcium carbonates , laminar silicates , aluminium silicates , plastic pigments (e . g . polystyrene, polyethylene, polypropylene) , silicas (e . g . colloidal silicas , precipitated silicas ) , silica gels , cationized variants of the silica compounds mentioned, aluminium compounds (e . g .
- other pigments such as calcium carbonates , laminar silicates , aluminium silicates , plastic pigments (e . g . polystyrene, polyethylene, polypropylene) , silicas (e . g . colloidal silicas , precipitated silicas ) , silica gels , cationized variants of the silica compounds mentioned, aluminium compounds (e . g .
- aluminium sols colloidal aluminium oxides and hydroxy compounds thereof, such as pseudoboehmites , boehmites , aluminium hydroxide) , magnesium oxide, zinc oxide, zirconium oxide, magnesium carbonates , kaolin, clay, talc, calcium sulfate, zinc carbonate, satin white, lithopones and zeolites .
- the coating composition can preferably have a content of aluminium oxide particles of between 10 and 60 wt . % . It can preferably be greater than 15 wt . %, and it can particularly preferably be greater than 25 wt . % .
- the coating composition can furthermore have a content of binder, based on the aluminium oxide powder, which is between 3 and 150 wt . % . It can preferably be between 10 and 40 wt . %, and it can very particularly preferably be between 3 and 15 wt . % .
- Crosslinking agents can serve to increase the resistance of the binder system and therefore of the coating to water, such as zirconium oxides , boric acid, melamine resins , glyoxal and isocyanates and other molecules which j oin the molecular chains of the binder system to one another .
- Auxiliary substances such as optical brighteners , defoamers , wetting agents , pH buffers , UV absorbers and viscosity auxiliaries , can furthermore be employed.
- the coating composition can be prepared by adding, while stirring, the dispersion according to the invention to a solution of the binder, to which further additives can optionally also be added, and optionally diluting the mixture until the desired ratio of aluminium oxide powder and binder and the desired total solids content are established.
- the sequence of the addition is not important in this context .
- the mixture is optionally stirred for a certain period of time and, if necessary, subsequently deaerated in vacuo .
- Additives are to be understood as meaning, for example, pigments , crosslinking agents , optical brighteners , defoamers , wetting agents , pH buffers , UV absorbers and viscosity auxiliaries .
- the present invention also provides the use of the coating composition according to the invention for the preparation of ink j et recording media .
- Example 1 4.5 kg/h of AICI 3 are vaporized. The vapours are transferred by means of an inert gas into a mixing chamber . Separately from this , 2.1 Nm 3 /h of hydrogen and 5 Nm 3 /h of primary air are introduced into the mixing chamber . The reaction mixture is fed in a central tube to a burner and ignited. The exit speed of the reaction mixture from the burner is 33.1 m/s . The flame burns here in a water-cooled reaction chamber . 15 Nm 3 /h of secondary air are additionally introduced into the reaction chamber . The powder formed is deposited in a downstream filter and then treated with air and steam in counter-current at approx . 700 °C .
- Examples 2 to 6 are carried out analogously to Example 1 , changes to the reaction conditions being found in Table 1.
- Examples 1 to 3 lead to aluminium oxide powders according to the invention having values for the BET surface area of 49.54 and 89 m 2 /g and a content of delta-aluminium oxide of from 30 to 90 % .
- the values for gamma, lambda, v B and gamma*v B /lambda and the ratio of primary air to secondary- air are within the ranges claimed.
- the aluminium oxide powder obtained in Example 4 has too high a BET surface area with too low a content of delta-aluminium oxide .
- the values for gamma, lambda and v B and the ratio of primary air to secondary air here are indeed within the range claimed, but the value for gamma*v B /lambda lies outside .
- Table 1 Starting substances and amounts ; physico-chemical values of the aluminium oxide powders
- the aluminium oxide powder obtained in Example 5 has too high a BET surface area, and at the same time no delta- aluminium oxide is detectable .
- the values for lambda and v B and the value for gamma*v B /lambda and the ratio of primary air to secondary air, but not the gamma value, are within the range claimed.
- the aluminium oxide powder obtained in Example 6 has too low a content of delta-aluminium oxide .
- the values for gamma, lambda and v B and the value for gamma*v B /lambda, but not the ratio of primary air to secondary air, are within the range claimed.
- Dispersion 1 80 kg of the aluminium oxide powder described in Example 1 , corresponding to 20 wt . % aluminium oxide, are introduced in portions into 280 litres of deionized water, the pH of which is adjusted to 3.9 with propionic acid, under dispersing conditions (rotor-stator unit) and dispersing is carried out with .... introduced into the water . After the total amount of powder has been incorporated, the suspension obtained is subj ected to intensive shear forces for approx . 60 minutes . During the introduction of the powder, the pH is kept at between 4.0 and 4.1 by addition of propionic acid. The average aggregate size in the dispersion is 136 nm (determined by means of dynamic light scattering) .
- Dispersion 2 A portion of the dispersions is ground further with a high pressure homogenizer, Ultimaizer System from Sugino Machine Ltd. , model HJP-25050 , but with a three-j et chamber instead of the two-j et chamber installed in the Ultimaizer System. (The Ultimaizer System is used only as a high pressure pump . ) The three-j et chamber divides the predispersion, which is under a high pressure, into three part streams , each of which is let down via a diamond nozzle having a diameter of 0.25 mm. The three dispersion j ets emerging at a very high speed meet in a collision point, the dispersing/grinding effect to be attained being achieved.
- the collision point is surrounded tetrahedrally by beads (three base beads each 8 mm, upper bead 10 mm) of sapphire . Since all three j ets of liquid lie in a common imaginary plane, the angle with respect to the adj acent j et is in each case 120 ° . 250 MPa is chosen as the pressure for grinding the aluminium oxide predispersion .
- the dispersion can then be cooled without problems with the aid of a conventional heat exchanger .
- the average aggregate size in the dispersion is 51 nm (determined by means of dynamic light scattering) .
- Staining colours Staining colour A An aqueous polyvinyl alcohol solution (PVA Mowiol 40-88 , Clariant) having a solids content of 12.26 % is initially introduced into a glass beaker, and an amount of water is added such that, after addition of dispersion 2 , a staining colour having a solids content of 34 wt . % is obtained.
- the particular dispersion is added here to the polyvinyl alcohol solution, to which water has been added, while stirring with a dissolver disc at 500 revolutions per minute (rpm) .
- the mixture is subsequently stirred at 500 rpm for a further 30 minutes .
- the staining colours are deaerated with the aid of a desiccator and a water j et pump .
- Staining colour B As staining colour A, but the aqueous polyvinyl alcohol solution (PVA Mowiol 26-98 , Clariant) has a solids content of 13.30 wt . % . The solids content of the staining colour is adjusted to 26 wt . % .
- Staining colour C As staining colour A. The solids content of the staining colour is adjusted to 26 wt . % .
- the staining colours are distinguished by a very low viscosity .
- Ink receiving media
- Staining colours A and B are applied to a matt ink j et paper (Zweckform, no . 2576) with the aid of a 24 micrometre wet film spiral blade . Drying is carried out with a hairdryer . The coated paper is then satinized with the aid of a laboratory calender under a pressure of 10 bar at 50 °C . The rate of application obtained for staining colour A is 12 g/m 2 , and that for B is 15 g/m 2 .
- the coated papers are printed on with an Epson Stylus Color 980 with the settings of premium glossy photo paper, 1 , 440 dpi, bidirectional, calibration Epson, gamma (D) : 1.8 using an internal test image .
- Staining colour C is applied to a 100 micrometre thick, untreated polyester film (Benn) with the aid of a 100 micrometre wet film spiral blade . Drying is carried out with a hairdryer .
- the coated films are printed on with an Epson Stylus Color 980 with the settings of photo quality glossy film, 1 , 440 dp, calibration Epson, gamma (D) : 1.8 using an internal test image .
- the visual gloss , adhesion and test image impression which is obtained with the staining colours is good to very good.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05821745A EP1824787B1 (en) | 2004-12-22 | 2005-12-20 | Aluminium oxide powder, dispersion and coating composition |
JP2007547480A JP4751400B2 (en) | 2004-12-22 | 2005-12-20 | Aluminum oxide powder, dispersion and coating composition |
AT05821745T ATE506324T1 (en) | 2004-12-22 | 2005-12-20 | ALUMINUM OXIDE POWDER, DISPERSION AND COATING COMPOSITION |
KR1020077014072A KR100934536B1 (en) | 2004-12-22 | 2005-12-20 | Aluminum Oxide Powders, Dispersions, and Coating Compositions |
DE602005027606T DE602005027606D1 (en) | 2004-12-22 | 2005-12-20 | Aluminum oxide powder, dispersion and coating composition |
CN2005800441681A CN101087731B (en) | 2004-12-22 | 2005-12-20 | Aluminium oxide powder, dispersion and coating composition |
US11/722,268 US8197791B2 (en) | 2004-12-22 | 2005-12-20 | Aluminium oxide powder, dispersion and coating composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004061700.7 | 2004-12-22 | ||
DE102004061700A DE102004061700A1 (en) | 2004-12-22 | 2004-12-22 | Alumina powder, dispersion and coating composition |
Publications (1)
Publication Number | Publication Date |
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WO2006067127A1 true WO2006067127A1 (en) | 2006-06-29 |
Family
ID=35681963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/056936 WO2006067127A1 (en) | 2004-12-22 | 2005-12-20 | Aluminium oxide powder, dispersion and coating composition |
Country Status (10)
Country | Link |
---|---|
US (1) | US8197791B2 (en) |
EP (1) | EP1824787B1 (en) |
JP (1) | JP4751400B2 (en) |
KR (1) | KR100934536B1 (en) |
CN (1) | CN101087731B (en) |
AT (1) | ATE506324T1 (en) |
DE (2) | DE102004061700A1 (en) |
ES (1) | ES2363782T3 (en) |
TW (1) | TWI304792B (en) |
WO (1) | WO2006067127A1 (en) |
Cited By (4)
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US7277009B2 (en) | 2003-02-21 | 2007-10-02 | Services Llc | Cargo lock and monitoring apparatus and process |
WO2008094928A1 (en) | 2007-01-29 | 2008-08-07 | Evonik Degussa Gmbh | Fumed metal oxides for investment casting |
EP4064386A1 (en) | 2021-03-24 | 2022-09-28 | Evonik Operations GmbH | Core-shell particles based on red lead for lead-acid batteries |
WO2022238171A1 (en) | 2021-05-14 | 2022-11-17 | Evonik Operations Gmbh | Fumed alumina powder with reduced moisture content |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010069690A1 (en) * | 2008-12-17 | 2010-06-24 | Evonik Degussa Gmbh | Process for preparing an aluminium oxide powder having a high alpha-al2o3 content |
JP6134548B2 (en) * | 2013-03-21 | 2017-05-24 | 株式会社トクヤマ | Spherical alumina particle powder and method for producing the same |
JP6147614B2 (en) * | 2013-07-17 | 2017-06-14 | 株式会社トクヤマ | Dry alumina fine particles and production method thereof |
CN106147616A (en) * | 2015-04-28 | 2016-11-23 | 天津西美半导体材料有限公司 | The preparation method of solvent-borne type modified aluminum oxide polishing fluid |
CN106592258A (en) * | 2016-11-28 | 2017-04-26 | 江苏格美高科技发展有限公司 | High-gloss ink-jet printing canvas and preparation method thereof |
CN109319813A (en) * | 2018-11-09 | 2019-02-12 | 中山大学 | A kind of preparation method of two dimensional oxidation aluminium powder |
KR102179215B1 (en) * | 2018-12-19 | 2020-11-16 | 주식회사 포스코 | Annealing separating agent composition for grain oriented electrical steel sheet, grain oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet |
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EP0395925A1 (en) * | 1989-04-19 | 1990-11-07 | Degussa Aktiengesellschaft | Alpha-aluminium oxide and process for its preparation |
EP0855368A1 (en) * | 1997-01-23 | 1998-07-29 | Degussa Aktiengesellschaft | Pyrogenic oxides and process for the preparation thereof |
EP1083151A1 (en) * | 1999-09-10 | 2001-03-14 | Degussa-Hüls Aktiengesellschaft | Pyrogenically prepared alumina |
EP1256548A1 (en) * | 1999-12-27 | 2002-11-13 | Showa Denko K.K. | Alumina particles, method for producing the same, composition comprising the same, and alumina slurry for polishing |
EP1331102A2 (en) * | 2002-01-29 | 2003-07-30 | Tomoegawa Paper Co. Ltd. | Ink jet recording sheet |
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US4154812A (en) * | 1977-03-25 | 1979-05-15 | W. R. Grace & Co. | Process for preparing alumina |
US5527423A (en) * | 1994-10-06 | 1996-06-18 | Cabot Corporation | Chemical mechanical polishing slurry for metal layers |
US20030077221A1 (en) * | 2001-10-01 | 2003-04-24 | Shivkumar Chiruvolu | Aluminum oxide powders |
MY117813A (en) * | 1998-01-08 | 2004-08-30 | Nissan Chemical Ind Ltd | Alumina powder, process for producing the same and polishing composition. |
US6887559B1 (en) * | 1999-10-01 | 2005-05-03 | Cabot Corporation | Recording medium |
US7067105B2 (en) * | 1999-12-27 | 2006-06-27 | Showa Denko K.K. | Alumina particles, production process thereof, composition comprising the particles and alumina slurry for polishing |
EP1264705A4 (en) * | 2000-03-14 | 2005-06-08 | Yupo Corp | Recording paper for inkjet printer |
DE10360087A1 (en) * | 2003-12-20 | 2005-07-21 | Degussa Ag | Flame hydrolysis produced, hochoberflächiges alumina powder |
US20060104895A1 (en) * | 2004-11-18 | 2006-05-18 | Saint-Gobain Ceramics & Plastics, Inc. | Transitional alumina particulate materials having controlled morphology and processing for forming same |
-
2004
- 2004-12-22 DE DE102004061700A patent/DE102004061700A1/en not_active Withdrawn
-
2005
- 2005-12-20 US US11/722,268 patent/US8197791B2/en active Active
- 2005-12-20 AT AT05821745T patent/ATE506324T1/en not_active IP Right Cessation
- 2005-12-20 CN CN2005800441681A patent/CN101087731B/en active Active
- 2005-12-20 EP EP05821745A patent/EP1824787B1/en active Active
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EP0395925A1 (en) * | 1989-04-19 | 1990-11-07 | Degussa Aktiengesellschaft | Alpha-aluminium oxide and process for its preparation |
EP0855368A1 (en) * | 1997-01-23 | 1998-07-29 | Degussa Aktiengesellschaft | Pyrogenic oxides and process for the preparation thereof |
EP1083151A1 (en) * | 1999-09-10 | 2001-03-14 | Degussa-Hüls Aktiengesellschaft | Pyrogenically prepared alumina |
EP1256548A1 (en) * | 1999-12-27 | 2002-11-13 | Showa Denko K.K. | Alumina particles, method for producing the same, composition comprising the same, and alumina slurry for polishing |
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US7277009B2 (en) | 2003-02-21 | 2007-10-02 | Services Llc | Cargo lock and monitoring apparatus and process |
WO2008094928A1 (en) | 2007-01-29 | 2008-08-07 | Evonik Degussa Gmbh | Fumed metal oxides for investment casting |
EP4064386A1 (en) | 2021-03-24 | 2022-09-28 | Evonik Operations GmbH | Core-shell particles based on red lead for lead-acid batteries |
WO2022238171A1 (en) | 2021-05-14 | 2022-11-17 | Evonik Operations Gmbh | Fumed alumina powder with reduced moisture content |
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KR100934536B1 (en) | 2009-12-29 |
JP4751400B2 (en) | 2011-08-17 |
DE102004061700A1 (en) | 2006-07-06 |
DE602005027606D1 (en) | 2011-06-01 |
US20090272937A1 (en) | 2009-11-05 |
ATE506324T1 (en) | 2011-05-15 |
TWI304792B (en) | 2009-01-01 |
EP1824787A1 (en) | 2007-08-29 |
CN101087731A (en) | 2007-12-12 |
US8197791B2 (en) | 2012-06-12 |
ES2363782T3 (en) | 2011-08-16 |
JP2008524109A (en) | 2008-07-10 |
EP1824787B1 (en) | 2011-04-20 |
KR20070086495A (en) | 2007-08-27 |
CN101087731B (en) | 2011-01-05 |
TW200639123A (en) | 2006-11-16 |
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