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    42.
    发明专利
    未知

    公开(公告)号：BR9602592A

    公开(公告)日：1998-10-06

    申请号：BR9602592

    申请日：1996-06-03

    Applicant: DEGUSSA

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

    IPC: C01B33/187 ,  C01B33/193 ,  C08K3/00 ,  C08K3/36 ,  C08K9/00 ,  C08K9/06 ,  C08L21/00 ,  C09C1/30 ,  C08K5/54 ,  C08L7/00 ,  C08L9/00 ,  C08L13/00 ,  C08F7/02

    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).

    46.
    发明专利
    未知

    公开(公告)号：DE59400684D1

    公开(公告)日：1996-10-24

    申请号：DE59400684

    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.

    49.
    发明专利
    未知

    公开(公告)号：FI943648A

    公开(公告)日：1995-02-08

    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 ,  C01B33/143

    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.

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