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    104.
    发明专利
    未知

    公开(公告)号：ID16472A

    公开(公告)日：1997-10-02

    申请号：ID961490

    申请日：1996-06-03

    Applicant: DEGUSSA

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

    IPC: C01B33/193 ,  C01B33/187 ,  C08K3/00 ,  C08K3/36 ,  C08K9/00 ,  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).

    105.
    发明专利
    未知

    公开(公告)号：ES2092850T3

    公开(公告)日：1996-12-01

    申请号：ES94111686

    申请日：1994-07-27

    Applicant: DEGUSSA

    Inventor： ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMULLER 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.

    Process for the Production of a Precipitated Silica
    107.
    发明专利
    Process for the Production of a Precipitated Silica 未知

    公开(公告)号：CA2129607A1

    公开(公告)日：1995-02-08

    申请号：CA2129607

    申请日：1994-08-05

    Applicant: ESCH HEINZ ,  KUHLMANN ROBERT ,  NEUMUELLER MATTHIAS ,  OTTO KARIN ,  RAUSCH RALF ,  DEGUSSA

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

    IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C01B33/12 ,  A61K7/16

    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.

    108.
    发明专利
    未知

    公开(公告)号：FI944679A0

    公开(公告)日：1994-10-06

    申请号：FI944679

    申请日：1994-10-06

    Applicant: DEGUSSA

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

    IPC: C01B33/12 ,  C01B33/187 ,  C01B33/193 ,  C08J3/24 ,  C08K3/00 ,  C08K3/36 ,  C08L21/00 ,  C08L83/04 ,  C01B ,  C08L ,  C08K

    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.

    109.
    发明专利
    未知

    公开(公告)号：FI943648A0

    公开(公告)日：1994-08-05

    申请号：FI943648

    申请日：1994-08-05

    Applicant: DEGUSSA

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

    IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/193 ,  C09C ,  A61K

    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.

    110.
    发明专利
    未知

    公开(公告)号：DE3780279D1

    公开(公告)日：1992-08-13

    申请号：DE3780279

    申请日：1987-09-05

    Applicant: DEGUSSA

    Inventor： REINHARDT HELMUT DR ,  BECKER ADAM ,  KUHLMANN ROBERT ,  NAUROTH PETER

    IPC: A61K8/00 ,  A61K8/25 ,  A61Q11/00 ,  C01B33/12 ,  C01B33/154 ,  C01B33/157 ,  C01B33/187 ,  C01B33/193 ,  C09C1/30 ,  A61K7/16

    Abstract: Prodn. of pptd. silica with a cleaning, polishing and thickening action in dentifrices is effected by mixing conventionally prepd. pptd. silicas with different particle sizes and densities in the form of a slurry, and processing the slurry by filtration, washing, drying and grinding. Also claimed are pptd. silicas characterised in terms of their physicochemical properties. Pref. silicas used are (A) a thickener-type silica prepd. as described in DE1467019; (B) an abrasive-type silica prepd. as described in DE3114493, example 10; and (C) a silica with a low Fe content prepd. as described in DE 1293138, example 1. Combinations of (A)+(B), (A)+(C) and (B)+(C) may also be used.

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