公开(公告)号：ZA9811286B

公开(公告)日：1999-06-09

申请号：ZA9811286

申请日：1998-12-09

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMUELLER MATTHIAS ,  OTTO KARIN ,  RAUSCH RALF ,  THOMAS KLAUS-PETER

IPC: A61K8/25 ,  A61Q11/00 ,  A61K

Abstract: Precipitated silica that contains an active agent and provides delayed release of the active agent is new. Also claimed is a process for preparing a product as above, in which precipitated silica is produced in known manner and a moderately to sparingly water-soluble active agent is added to the precipitation medium or the precipitate suspension or is dried together with the washed and optionally redispersed silica paste or is ground together with the dried material.

公开(公告)号：ZA966165B

公开(公告)日：1997-02-10

申请号：ZA966165

申请日：1996-07-19

Applicant: DEGUSSA

Inventor： RAUSCH RALF ,  KUHLMANN ROBERT ,  MEIER KARL ,  ESCH HEINZ ,  TUERK GUENTER ,  MEON WALTER

IPC: C01B33/18 ,  C01B33/193 ,  C08K3/36 ,  C08L23/06 ,  C01B33/143 ,  H01M2/14 ,  H01M2/16 ,  C01B ,  H01M ,  C08K ,  C08L

Abstract: Pptd. silica (I) contg. 4-18 wt.% Na2SO4 is claimed. Also claimed are: (1) prepn. of the silica (I); (II) use of the silica in battery separators; and (III) battery separators per se The battery separator is pref. of polyethylene.

公开(公告)号：DK0643015T3

公开(公告)日：1996-12-23

申请号：DK94111686

申请日：1994-07-27

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMUELLER MATTHIAS ,  OTTO KARIN DR ,  RAUSCH RALF DR

IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193

Abstract: Precipitated silica having a BET surface area of 10-130 m /g, a CTAB surface area of 10-70 m /g, a mean particle diameter of 5-20 mu m, a Cu abrasion in 10% strength glycerol (glycerine) dispersion of 4-50 mg and a thickening behaviour in CMC solution (20% strength dispersion) of 300-3500 mPa.s is prepared by simultaneously adding alkali metal silicate (weight ratio SiO2: alkali metal oxide = 2.5-3.9:1) and a mineral acid to an initial charge of water which has been adjusted to a pH of from 7.0 to 9.9 or from 10.0 to 10.7 by addition of water, keeping the pH constant between 7.0 and 9.9 or 10.0 and 10.7, with the initial precipitation temperature being 50-90 DEG C and a viscosity increase commencing at the latest after 25% of the precipitation time, setting the pH to /= 160 g/l to 240 g/l, separating off the solid by filtration and washing, drying and milling it. The precipitated silica can be used as abrasive and/or thickening component in toothpastes.

公开(公告)号：TR199600452A2

公开(公告)日：1996-12-21

申请号：TR9600452

申请日：1996-05-31

Applicant: DEGUSSA

Inventor： GORL DR UDO ,  HUNSCHE ANDREA ,  KUHLMANN ROBERT ,  SIRAY MUSTAFA ,  ESCH HEINZ

IPC: C01B33/193 ,  C08K3/00 ,  C08K3/36 ,  C08K9/00 ,  C01B33/187 ,  C08K9/06 ,  C08L21/00 ,  C09C1/30

Abstract: - Pptd. SiO2 (I) has a CTAB surface area (to ASTM D 3765-92) of 200-400 m /g, a DBP no. (to ASTM D 2414) between 230 and 380 ml/100 g as powder and 180-250 g/100 g as granulate; a silanol gp. density (V2 consumption of NaOH) of 20-30 ml; and a typical macropore size distribution for each surface area, determined by HG porosimetry (DIN 66133) for certain pore size intervals (incremental plot). For CTAB surface areas of (A) 200-250, (B) 250-3300, (C) 300-400 m /g, the Hg consumption is (A) 0.27-0.49, (B) 0.35-0.50, (C) 0.32-0.42 ml/g for 10-20 nm pores; (A) 0.22-0.32, (B) 0.15-0.30, (C) 0.17-0.22 ml/g for 20-30 nm pores; (A) 0.15-0.21, (B) 0.12-0.17, (C) 0.12-0.15 ml/g for 30-40 nm pores; (A) 0.11-0.16, (B) 0.09-0.12, (C) 0.08-0.11 ml/g for 40-50 nm pores; and (A) 0.08-0.12, (B) 0.06-0.10, (C) 0.06-0.09 ml/g for 50-60 nm pores. Also claimed are vulcanisable rubber blends contg. 5-100, esp. 15-60 phr (I); and rubber blends and/or vulcanisates contg. opt. silane-modified (I).

公开(公告)号：AT142986T

公开(公告)日：1996-10-15

申请号：AT94111686

申请日：1994-07-27

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMUELLER MATTHIAS ,  OTTO KARIN DR ,  RAUSCH RALF DR

IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193

Abstract: Precipitated silica having a BET surface area of 10-130 m /g, a CTAB surface area of 10-70 m /g, a mean particle diameter of 5-20 mu m, a Cu abrasion in 10% strength glycerol (glycerine) dispersion of 4-50 mg and a thickening behaviour in CMC solution (20% strength dispersion) of 300-3500 mPa.s is prepared by simultaneously adding alkali metal silicate (weight ratio SiO2: alkali metal oxide = 2.5-3.9:1) and a mineral acid to an initial charge of water which has been adjusted to a pH of from 7.0 to 9.9 or from 10.0 to 10.7 by addition of water, keeping the pH constant between 7.0 and 9.9 or 10.0 and 10.7, with the initial precipitation temperature being 50-90 DEG C and a viscosity increase commencing at the latest after 25% of the precipitation time, setting the pH to /= 160 g/l to 240 g/l, separating off the solid by filtration and washing, drying and milling it. The precipitated silica can be used as abrasive and/or thickening component in toothpastes.

公开(公告)号：ZA964505B

公开(公告)日：1996-09-03

申请号：ZA964505

申请日：1996-05-31

Applicant: DEGUSSA

Inventor： GOERL UDO ,  KUHLMANN ROBERT ,  ESCH HEINZ ,  HUNSCHE ANDREA ,  SIRAY MUSTAFA

IPC: C01B33/187 ,  C01B33/193 ,  C08K3/00 ,  C08K3/36 ,  C08K9/00 ,  C08K9/06 ,  C08L21/00 ,  C09C1/30 ,  C01B ,  C09C ,  C08L ,  C08K

公开(公告)号：AU665913B2

公开(公告)日：1996-01-18

申请号：AU6893294

申请日：1994-08-05

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMULLER MATTHIAS ,  OTTO KARIN ,  RAUSCH RALF

IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C01B33/187

Abstract: Precipitated silica having a BET surface area of 10-130 m /g, a CTAB surface area of 10-70 m /g, a mean particle diameter of 5-20 mu m, a Cu abrasion in 10% strength glycerol (glycerine) dispersion of 4-50 mg and a thickening behaviour in CMC solution (20% strength dispersion) of 300-3500 mPa.s is prepared by simultaneously adding alkali metal silicate (weight ratio SiO2: alkali metal oxide = 2.5-3.9:1) and a mineral acid to an initial charge of water which has been adjusted to a pH of from 7.0 to 9.9 or from 10.0 to 10.7 by addition of water, keeping the pH constant between 7.0 and 9.9 or 10.0 and 10.7, with the initial precipitation temperature being 50-90 DEG C and a viscosity increase commencing at the latest after 25% of the precipitation time, setting the pH to /= 160 g/l to 240 g/l, separating off the solid by filtration and washing, drying and milling it. The precipitated silica can be used as abrasive and/or thickening component in toothpastes.

公开(公告)号：BR9404019A

公开(公告)日：1995-06-27

申请号：BR9404019

申请日：1994-10-07

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  GOERL UDO DR ,  KUHLMANN ROBERT ,  RAUSCH RALF DR

IPC: C01B33/12 ,  C01B33/187 ,  C01B33/193 ,  C08J3/24 ,  C08K3/00 ,  C08K3/36 ,  C08L21/00 ,  C08L83/04

Abstract: A precipitate of silica having the following physicochemical parameters: BET surface area: from 35 to 350 m /g Ratio of BET/CTAB surface area: from 0.8 to 1.1 Pore volume PV: from 1.6 to 3.4 ml/g Silanol group density (V2 = consumption of NaOH): from 6 to 20 ml Mean aggregate size: from 250 to 1500 nm CTAB surface area: from 30 to 350 m /g DBP number: from 150 to 300 ml/100 g V2/V1 according to Hg porosimetry: from 0.19 to 0.46 DBP/CTAB: from 1.2 to 2.4 is prepared by reacting alkali metal silicate with mineral acids at temperatures of from 60 to 95 DEG C while maintaining a pH of from 7.5 to 10.5 with continuous stirring, continuing the reaction to a solids concentration in the precipitate suspension of from 80 to 120 g/l, adjusting the pH to a value equal to or less than 5, filtering off, washing, drying and, if desired, milling or granulating the precipitated silica. The precipitated silica is used as filler in vulcanisable rubber mixtures and vulcanisates.

公开(公告)号：NO942882L

公开(公告)日：1995-02-08

申请号：NO942882

申请日：1994-08-03

Applicant: DEGUSSA

Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMULLER MATTHIAS ,  OTTO KARIN ,  RAUSCH RALF

IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C01B33/18

Abstract: Precipitated silica having a BET surface area of 10-130 m /g, a CTAB surface area of 10-70 m /g, a mean particle diameter of 5-20 mu m, a Cu abrasion in 10% strength glycerol (glycerine) dispersion of 4-50 mg and a thickening behaviour in CMC solution (20% strength dispersion) of 300-3500 mPa.s is prepared by simultaneously adding alkali metal silicate (weight ratio SiO2: alkali metal oxide = 2.5-3.9:1) and a mineral acid to an initial charge of water which has been adjusted to a pH of from 7.0 to 9.9 or from 10.0 to 10.7 by addition of water, keeping the pH constant between 7.0 and 9.9 or 10.0 and 10.7, with the initial precipitation temperature being 50-90 DEG C and a viscosity increase commencing at the latest after 25% of the precipitation time, setting the pH to /= 160 g/l to 240 g/l, separating off the solid by filtration and washing, drying and milling it. The precipitated silica can be used as abrasive and/or thickening component in toothpastes.

公开(公告)号：DK160815B

公开(公告)日：1991-04-22

申请号：DK152382

申请日：1982-04-02

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  KUHLMANN ROBERT ,  TUERK GUENTER ,  BECKER ADAM

IPC: C01B33/20 ,  A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/187 ,  C01B33/193 ,  C01B37/02 ,  C08K3/00 ,  C08K3/34 ,  C08K3/36 ,  C08K7/18 ,  C08L7/00 ,  C08L21/00 ,  C09C1/30

Abstract: Precipitated silicas which have the following physicochemical characteristics, depending on the manner in which they are milled: -Pendulum -roller mill Jet mill -BET m2/g 15-110 15-110 -surface -area -Tamped g/l 150-750 90-650 -den- -sity -Cu abrasion in 10% mg 5-30 5-30 -strength glycerol -dispersion -Lightness % 86-96 90-96 -value -A -Particle size dis- as in FIG. 1 as in FIG. 2 -tribution curve -determined by a -Coulter Counter -"ALPINE screen retain- % by 63 mu m weight -Viscosity of a 30% mPa.s 30,000 to 60,000 -strength dispersion in -a 1:1 glycerol/water -mixture (Brookfield -RTV, Sp5) - are prepared by diluting a precipitated silica original suspension obtained according to German Published Application DAS 1,467,019 and simultaneously adding alkali metal silicate solution, sulfuric acid and water while keeping the pH constant between 7 and 9. The precipitated silica is then filtered off, washed, dried and milled using a pendulum roller mill or a jet mill. Because of their abrasiveness, the precipitated silicas can be employed as cleansing and abrasive agents and, in the case of the jet-milled product, also as a polishing agent, abrasive and thickener in toothpastes.