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公开(公告)号：DE4109447A1
公开(公告)日：1992-01-23
申请号：DE4109447
申请日：1991-03-22
Applicant: DEGUSSA
Inventor： DEUSSER HANS DR , GOEBEL THOMAS DR , MEYER JUERGEN DR , MICHAEL GUENTHER DR , STUEBBE ANDREAS
Abstract: Surface-modified silica prepared by a pyrogenic method is obtained by placing a silica, prepared by a pyrogenic method, in a known mixing apparatus, spraying it with a chemical compound from the group CHF2-CF2-O-(CH2)3-Si(OCH3)3 CF3-CHF-CF2-O-(CH2)3-Si(OCH3)3 C4F9-CH2-CH2-Si(OCH3)3 C6F13-CH2-CH2-Si(OCH3)3 with thorough mixing, carrying out further mixing and heating the resulting mixture over a relatively long period.
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公开(公告)号：DE4202695C2
公开(公告)日：1993-12-09
申请号：DE4202695
申请日：1992-01-31
Applicant: DEGUSSA
Inventor： DEUSER HANS DR , KERNER DIETER DR , MEYER JUERGEN DR , MICHAEL GUENTHER DR , STUEBBE ANDREAS
Abstract: Surface-modified, pyrogenically produced titanium dioxide which has the following physico-chemical properties: -Surface (m2/g) 5 to 120 -Stamping density (g/l) 50 to 250 -Drying loss (%)
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公开(公告)号：DE102010043721A1
公开(公告)日：2012-05-10
申请号：DE102010043721
申请日：2010-11-10
Applicant: EVONIK DEGUSSA GMBH
Inventor： MICHAEL GUENTHER DR , LORTZ WOLFGANG DR , LADWIG THORSTEN , GROS TINA
Abstract: Wässerige, hydrophobierte Siliciumdioxidpartikel enthaltende Dispersion, die a. 50–80 Gew.-% Wasser, b. 10–30 Gew.-% hydrophobierte Siliciumdioxidpartikel c. 5–15 Gew.-%, wenigstens ein Alkoholalkoxylat der allgemeinen Formel R1O((CH2)mO)nH, wobei R1 ein verzweigter oder unverzweigter Alkyl- oder Alkenylrest mit 10–25 C-Atomen, m = 2 oder 3 und n = 10–50 ist, d. 0,5–5 Gew.-% wenigstens ein Amin und/oder einen Aminoalkohol mit einem Molekulargewicht von weniger als 500 und e. 0–1 Gew.-% N-Methylpyrrolidon, enthält, wobei sich alle Angaben zu Gewichtsprozenten sich auf die Dispersion beziehen. Lackzubereitung enthaltend die Dispersion.
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公开(公告)号：DK0761566T3
公开(公告)日：2001-09-10
申请号：DK96113807
申请日：1996-08-29
Applicant: DEGUSSA
Inventor： RIEDEMANN THOMAS , CAVAGNARO RICHARD , ROLF KLAUS , STREMPEL HANS-JUERGEN , BRAND GERD , MICHAEL GUENTHER DR , ERNST ANDREAS , SCHAFFER ROLAND , RIEMENSCHNEIDER HERBERT DR
Abstract: An apparatus (20) and method for dispensing fine particle material from a container (128) such as a flexible intermediate bulk container (128). The invention includes a dispensing assembly (20) that has a dispensing device that is secured to an outlet tube (134) of the container (128). Securement is achieved by a strap member (136) wrapped about the container's outlet tube (134) and a clamping casing (62) and/or by an inflatable member (80) that expands outward from the clamping casing (62). The casing (62) surrounds a transport tube (28) which is axially shiftable following securement of the clamping casing (62) to the outlet tube (134). A head piece (22) with gas cavity (40) and radial (50) and oblique (52) extending ports is provided at the end of the transport tube (28). The dispensing device (20) is inserted into the outlet tube (134) below a blocking member (146) provided at the base of the outlet tube (134). Following attachment of the outlet tube (134) to the clamping casing (62), the blocking member (146) is released. The transport tube (28) is then released from a first position, shifted and then fixed in a second position. The second position places the head (22) of the dispensing device (20) into the main compartment of the container (128) and above the released blocking member (146). At this location gas, is injected through the ports (50,52) and product is drawn out through the interior (32) of the transport tube (28). In an alternate embodiment, there is used, either alone or in combination with the headpiece (22), an injection branch (302) for directing a jet of air down the central axis of the transport tube (28). In another embodiment, a constricted member having a venturi configuration (314) is provided in the same area within the transport tube (28) as the outlet of the injection branch.
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Patent Agency Ranking
公开(公告)号：AT200462T
公开(公告)日：2001-04-15
申请号：AT96113807
申请日：1996-08-29
Applicant: DEGUSSA
Inventor： RIEDEMANN THOMAS , CAVAGNARO RICHARD , ROLF KLAUS , STREMPEL HANS-JUERGEN , BRAND GERD , MICHAEL GUENTHER DR , ERNST ANDREAS , SCHAFFER ROLAND , RIEMENSCHNEIDER HERBERT DR
Abstract: An apparatus (20) and method for dispensing fine particle material from a container (128) such as a flexible intermediate bulk container (128). The invention includes a dispensing assembly (20) that has a dispensing device that is secured to an outlet tube (134) of the container (128). Securement is achieved by a strap member (136) wrapped about the container's outlet tube (134) and a clamping casing (62) and/or by an inflatable member (80) that expands outward from the clamping casing (62). The casing (62) surrounds a transport tube (28) which is axially shiftable following securement of the clamping casing (62) to the outlet tube (134). A head piece (22) with gas cavity (40) and radial (50) and oblique (52) extending ports is provided at the end of the transport tube (28). The dispensing device (20) is inserted into the outlet tube (134) below a blocking member (146) provided at the base of the outlet tube (134). Following attachment of the outlet tube (134) to the clamping casing (62), the blocking member (146) is released. The transport tube (28) is then released from a first position, shifted and then fixed in a second position. The second position places the head (22) of the dispensing device (20) into the main compartment of the container (128) and above the released blocking member (146). At this location gas, is injected through the ports (50,52) and product is drawn out through the interior (32) of the transport tube (28). In an alternate embodiment, there is used, either alone or in combination with the headpiece (22), an injection branch (302) for directing a jet of air down the central axis of the transport tube (28). In another embodiment, a constricted member having a venturi configuration (314) is provided in the same area within the transport tube (28) as the outlet of the injection branch.
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公开(公告)号：DE4400170C1
公开(公告)日：1995-04-06
申请号：DE4400170
申请日：1994-01-05
Applicant: DEGUSSA
Inventor： MICHAEL GUENTHER DR , STADTMUELLER GUENTER , HENNIG THOMAS DR
Abstract: The thickening effect of flame hydrolytically produced silicon dioxide is determined by making a dispersion of the flame hydrolytically produced silicon dioxide in water or ethanol and measuring the turbidity of this dispersion.
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公开(公告)号：MY142439A
公开(公告)日：2010-11-30
申请号：MYPI20063879
申请日：2006-08-10
Applicant: EVONIK DEGUSSA GMBH
Inventor： KATUSIC STIPAN , HEBERER STEFAN , STAAB EDWIN , KROELL MICHAEL DR , KRAEMER MICHAEL , MICHAEL GUENTHER DR
Abstract: 2 0 CERIUM OXIDE POWDER AND CERIUM OXIDE DISPERSION ABSTRACT CERIUM OXIDE POWDER WHICH HAS CARBONATE GROUPS AND 5 COMPRISES CRYSTALLINE PRIMARY PARTICLES WHICH CONTAIN CERIUM OXIDE AND CARBONATE GROUPS ON THEIR SURFACE AND IN A LAYER CLOSE TO THE SURFACE, WHEREIN THE POWDER HAS A BET SURFACE AREA OF FROM 25 TO 150 M2 /G , 10 THE PRIMARY PARTICLES HAVE A MEAN DIAMETER OF FROM 5 TO 50 NM, THE LAYER CLOSE TO THE SURFACE OF THE PRIMARY PARTICLES HAS A DEPTH OF ABOUT 5 NM, THE CARBONATE CONCENTRATION IN THE LAYER CLOSE TO THE 15 SURFACE DECREASES INWARDS FROM THE SURFACE ON WHICH THE CARBONATE CONCENTRATION IS HIGHEST, - THE CARBON CONTENT DUE TO THE CARBONATE GROUPS ON THE SURFACE IS FROM 5 TO 50BY AREA AND THAT AT A DEPTH OF ABOUT 5 NM IN THE LAYER CLOSE TO THE SURFACE IS 20 FROM 0 TO 30BY AREA, - THE CONTENT OF CERIUM OXIDE, CALCULATED AS CEO2 AND BASED ON THE POWDER, IS AT LEAST 99.5BY WEIGHT AND THE CONTENT OF CARBON, ENCOMPASSING ORGANIC AND INORGANIC CARBON, IS FROM 0.01 TO 0.3BV WEIGHT, 25 BASED ON THE POWDER. DISPERSION CONTAINING THIS POWDER. I OO
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公开(公告)号：AT303345T
公开(公告)日：2005-09-15
申请号：AT02012592
申请日：2002-06-06
Applicant: DEGUSSA
Inventor： SERVATY SABINE DR , MICHAEL GUENTHER DR , KATUSIC STIPAN , MIESS HORST , KRESS PETER , HEYER CHRISTIANE DR
Abstract: Indium-tin oxide (I) is claimed, with physical-chemical parameters comprising average particle size 1-200 nm (tunneling electron microscope); BET surface area 0.1-300 m /g (DIN 66131); structure (x-ray diffraction) cubic indium oxide, tetragonal tin oxide; mesopores 0.03-0.30 ml/g (BJH method to DIN 66134); macropores 1.5-5.0 ml/g (DIN 66133); and bulk density 50-2000 g/l (DIN-ISO 787/XI). An Independent claim is also included for the preparation of (I) by mixing a solution of an indium salt with a solution of a tin salt, adding a solution of a salt of doping component(s) if necessary, atomizing the mixed solution, pyrolyzing and separating the product from the waste gases.
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公开(公告)号：DE4202695A1
公开(公告)日：1993-08-05
申请号：DE4202695
申请日：1992-01-31
Applicant: DEGUSSA
Inventor： DEUSSER HANS DR , KERNER DIETER DR , MEYER JUERGEN DR , MICHAEL GUENTHER DR , STUEBBE ANDREAS
Abstract: Modification uses a mixt. of 2 silanes; trimethoxy-n-octyl-silane of the formula (MeO)3-Si-(CH2)7-CH3 (II) and 3,3-diamino-n -propyl-triethoxy- silane of formula (EtO)3-Si-(CH2)2-CH(NH2)2 (III). (I) has a surface area of 5-120 m2/g, tamped density of 50-250 g/l, drying loss less than 5%, calcination loss of 5.0-15%, C content of 0.5-12% and pH of 4-10. (I) is prepd. by spraying a mixt. of (II) and (III) onto TiO2 in a mixer, continuing mixing after addn. and tempering the mixt. at 100-150 deg.C. USE/ADVANTAGE - (I) is used as an additive to toners, which are used in copiers. (I) is hydrophobic and free from solvent, in contrast to prods. treated with an organic solvent system. In an example, 2 kg pyrogenic TiO2, prepd. from TiCl4, were sprayed with a 100 g mixt. of 50 g (II) and 50 g (II) and 50 g (III) in a mixer, mixing was continued for 15 mins. followed by 2 hrs. tempering at 120 deg.C. The prod. (IA) had surface area = 38 m2/g, tamped density = 134 g/l, drying loss = 0.2%, calcination loss = 3.5%, C content = 3.0 and pH = 8.2. When used in a positive toner (7% C black pigment, 3% charge control agent, 90% resin), (IA) increased the charge stability.
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