公开(公告)号：NO20082480L

公开(公告)日：2008-06-02

申请号：NO20082480

申请日：2008-06-02

Applicant: EVONIK DEGUSSA GMBH

Inventor： BAUMANN FRANZ-ERICH ,  LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  HAGER HARALD

IPC: C08J3/12 ,  C09D177/00

Abstract: Process for preparing ultrafine powders based on polyamides by contacting polyamides having a relative solution viscosity &eegr;rel in the range from 1.5 to 2.0, measured in 0.5% m-cresol solution at 25° C., with an alcoholic medium in the presence of inorganic particles suspended therein under the action of pressure and/or temperature to generate an at least partial solution, and then precipitating the polyamide from the at least partial solution; the resulting ultrafine polyamide powders have a specific BET surface area of 5-100 m2/g; a fineness d50 of less than 70 μm; an apparent density AD from 250 to 1000 g/l; and a particle content of 0.1 to 80% by weight of inorganic particles based on the total weight of the polyamide powder; which powders are equally suitable for coatings and for mouldings and components with improved mechanical properties.

公开(公告)号：DE102005053071A1

公开(公告)日：2007-05-16

申请号：DE102005053071

申请日：2005-11-04

Applicant: DEGUSSA

Inventor： HAEGER HARALD ,  BAUMANN FRANZ-ERICH ,  LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH

IPC: C08J3/14 ,  C08L77/00

Abstract: Process for preparing ultrafine powders based on polyamides by contacting polyamides having a relative solution viscosity &eegr;rel in the range from 1.5 to 2.0, measured in 0.5% m-cresol solution at 25° C., with an alcoholic medium in the presence of inorganic particles suspended therein under the action of pressure and/or temperature to generate an at least partial solution, and then precipitating the polyamide from the at least partial solution; the resulting ultrafine polyamide powders have a specific BET surface area of 5-100 m2/g; a fineness d50 of less than 70 μm; an apparent density AD from 250 to 1000 g/l; and a particle content of 0.1 to 80% by weight of inorganic particles based on the total weight of the polyamide powder; which powders are equally suitable for coatings and for mouldings and components with improved mechanical properties.

公开(公告)号：DE10316661A1

公开(公告)日：2004-11-04

申请号：DE10316661

申请日：2003-04-11

Applicant: DEGUSSA

Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER ,  LEHMANN KATHRIN ,  RUETTGERODT ANGELA

IPC: C01B33/141 ,  C08G65/26 ,  C08G65/332 ,  C08L71/02 ,  C09C1/30 ,  C09D5/02 ,  C08K9/06 ,  C08K7/26 ,  B01F17/54

Abstract: Aqueous dispersion which comprises hydrophobized silicon dioxide powder with a content of between 5 and 50 wt. % and which comprises at least one compound of the general formula R & supl; -COO-(CH2-CH(Ph)-O)a-(CnH2n-xR2x-O)b-R3 (I). It is prepared by dispersing the hydrophobic silicon dioxide powder, dispersing agent and optionally pH-regulating substances and further additives in an aqueous medium. It can be employed as an additive to waterborne fillers in the automobile industry, as a coating constituent in can and coil coating processes, as an additive in water-based UV-curable formulations e.g. for wood preservation and as a constituent of protective lacquer films.

公开(公告)号：AU2003300515A8

公开(公告)日：2004-07-14

申请号：AU2003300515

申请日：2003-12-02

Applicant: DEGUSSA

Inventor： SCHUMACHER KAI ,  BATZ-SOHN CHRISTOPH ,  HASENZAHL STEFFEN

IPC: C01G23/07 ,  C09C1/36

Abstract: A powder containing particles with a core of titanium dioxide and a coating of silicon dioxide in an amount of between 0.5 and 40 wt. %, the particles have a BET surface of between 5 and 300 m 2 /g, and the particles are primary particles that have a coating of silicon dioxide and a core of titanium dioxide.

公开(公告)号：AU2003300515A1

公开(公告)日：2004-07-14

申请号：AU2003300515

申请日：2003-12-02

Applicant: DEGUSSA

Inventor： SCHUMACHER KAI ,  BATZ-SOHN CHRISTOPH ,  HASENZAHL STEFFEN

IPC: C01G23/07 ,  C09C1/36 ,  C09C1/00

Abstract: A powder containing particles with a core of titanium dioxide and a coating of silicon dioxide in an amount of between 0.5 and 40 wt. %, the particles have a BET surface of between 5 and 300 m 2 /g, and the particles are primary particles that have a coating of silicon dioxide and a core of titanium dioxide.

公开(公告)号：DE10204470C1

公开(公告)日：2003-08-14

申请号：DE10204470

申请日：2002-02-05

Applicant: DEGUSSA

Inventor： LORTZ WOLFGANG ,  BATZ-SOHN CHRISTOPH

IPC: B01J13/00 ,  B01F3/04 ,  B01F3/12 ,  B01F5/02 ,  B01F5/10 ,  B01J14/00 ,  B01J19/26 ,  B01F5/18

Abstract: The production of a finely divided stable dispersion of solids having an average particle size of 10 nm to 10 microns comprises injecting at least two streams of a pre-dispersion via high pressure pumps through a nozzle into a reactor chamber enclosing a reactor housing, introducing water vapor into the reactor chamber via an opening so that a vapor atmosphere mainly consisting of water vapor is produced in the chamber, and removing the finely dispersion and vapor and/or partially condensed vapor consisting mainly of water on the gas inlet side from the reactor chamber. An Independent claim is also included for a device for carrying out the process. Preferred Features: The pre-dispersion comprises water or organic compounds as the liquid phase. The pre-dispersion contains a dispersing agent and/or surface-active substances. The water vapor has a temperature of the boiling temperature of water at the pressure prevailing on the gas inlet side.

公开(公告)号：DE10203047A1

公开(公告)日：2003-08-07

申请号：DE10203047

申请日：2002-01-26

Applicant: DEGUSSA

Inventor： SCHARFE THOMAS ,  BATZ-SOHN CHRISTOPH ,  LORTZ WOLFGANG

IPC: B41J2/01 ,  B41M5/00 ,  B41M5/50 ,  B41M5/52 ,  C08K3/22 ,  C08K3/34 ,  C08L101/02 ,  C09C1/30 ,  C09C3/00 ,  C09D11/037 ,  C09D17/00 ,  D21H19/36 ,  C09D5/02 ,  C09D1/02 ,  C08K9/08

Abstract: In dispersions of mixed oxide particles containing silicon dioxide and cationic polymer, the amount of cationic polymer can be 25% decreased by doping the silicon dioxide with 0.25 wt.% aluminum oxide without affecting the positive surface charge on the particles. A stable aqueous dispersion contains flame-hydrolytically prepared mixed oxide particles containing silicon dioxide and aluminum oxide or titanium dioxide, with a BET (Brunauer Emmett Teller) surface area between 5 and 600 m2/g, which shows a negative zeta potential, and a dissolved cationic polymer of weight average mol. wt. less than 100,000 g/mole, the dispersion having a positive zeta potential. Independent claims are also included for the following: (1) a process for preparation of the dispersion involving predispersion and final dispersion, where before predispersion the cationic polymer is included in an aqueous medium or is added during dispersion, or the mixed oxide particles and cationic polymer are added alternately; (2) a brushing on paint for formation of an ink acceptance layer using the dispersion and at least one hydrophilic binder; (3) a process for preparation of the brushing on paint by addition of the dispersion to a solution of hydrophilic binder, optionally with addition of other additives, followed by dilution to the required ratio of mixed oxide and binder and the desired total solids content; (4) an ink take up medium using a brushing on paint; and (5) a method for preparation of the ink take up medium involving application of the brushing on paint to a carrier and drying.

公开(公告)号：BR0200278A

公开(公告)日：2003-04-29

申请号：BR0200278

申请日：2002-02-01

Applicant: DEGUSSA

Inventor： BATZ-SOHN CHRISTOPH ,  PANSTER PETER ,  MICHEL RUDOF ,  ALBERT MICHAEL ,  VRYENS IVO

IPC: C07B61/00 ,  C07F7/08 ,  C07F7/12 ,  C07F7/14

Abstract: Production of 3-functionalized propyl silanes (I) by reacting allylic compounds (II) with silanes (III) at 0-200 degrees C and 0.8-25 bar in the presence of a platinum catalyst comprises using a (III):(II) molar ratio of 3-100. Production of 3-functionalized propyl silanes (I) by reacting allylic compounds of formula (II) with silanes of formula (III) at 0-200 degrees C and 0.8-25 bar in the presence of a platinum catalyst comprises using a (III):(II) molar ratio of 3-100:1 H2C=CH-CH2X (II) R R R SiH (III) X = Cl, Br, I, F, CN, SCN, SH, SR, OH, NRR or OR; R, R = 1-6C alkyl or 3-7C alkyl (sic); and R -R = H, halogen, 1-6C alkyl, 1-6C haloalkyl, 3-6C allyl (sic), 1-4C alkoxy, phenyl, aryl or aralkyl.

公开(公告)号：AU2002337125A1

公开(公告)日：2003-04-22

申请号：AU2002337125

申请日：2002-09-23

Applicant: DEGUSSA

Inventor： HABERMANN HERBERT ,  BATZ-SOHN CHRISTOPH ,  HEMME INA ,  DIENER UWE ,  MORTERS MARTIN ,  LORTZ WOLFGANG

IPC: C01F7/02 ,  C01F7/30 ,  C03C19/00 ,  C09C1/04 ,  C09D17/00 ,  C09G1/02 ,  C09K3/14 ,  H01L21/02 ,  H01L21/304 ,  H01L21/306 ,  H01L21/321 ,  C01F7/16

Abstract: Aluminium oxide doped with a divalent metal oxide, produced by flame hydrolysis and which has no spinell structures or alpha-aluminium detectable in an x-ray diffractogram. It is produced by a pyrogenic process in which, during the flame hydrolysis of aluminium halogenides, an aerosol, which contains an aqueous solution of a divalent metal salt is added to the gas mixture. The doped aluminium oxides can be used in aqueous dispersions for chemical-mechanical polishing.

公开(公告)号：DE10065027A1

公开(公告)日：2002-07-04

申请号：DE10065027

申请日：2000-12-23

Applicant: DEGUSSA

Inventor： LORTZ WOLFGANG ,  MANGOLD HELMUT ,  BATZ-SOHN CHRISTOPH ,  PERLET GABRIELE ,  WILL WERNER

IPC: A61K8/18 ,  A61K8/25 ,  A61Q1/02 ,  C01B33/141 ,  C01B33/18 ,  C03C17/25 ,  C09C1/68 ,  C09G1/02 ,  C09K3/14 ,  D21H19/40 ,  H01L21/304 ,  H01L21/306 ,  C09D1/02 ,  B01F3/12

Abstract: A pyrogenic process is used to prepare alkali-doped silica particles. Particles produced by this process exhibit homogeneous doping, reduced agglomeration, greater stability and higher removal rates. Aqueous dispersions containing alkali-doped pyrogenic silica with average particle size less than 100 nm are used for polishing surfaces (CMP).