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公开(公告)号：DK162188C
公开(公告)日：1992-02-17
申请号：DK155482
申请日：1982-04-05
Applicant: DEGUSSA
Inventor： MUELLER KARL-HANS , NEUMUELLER MATTHIAS , TUERK GUENTHER
Abstract: A dental-care composition having improved shelf life in respect of rheology and abrasiveness, which as a novel feature, contains, as a cleansing agent, a bifunctional (thickening and abrasive) precipitated silica characterized by the following physico-chemical properties: -Pendulum - roller - mill Jet mill -BET surface area m2/g 15-110 15-110 -Tamped density g/l 150-750 90-650 -Secondary particle size FIG. 1 FIG. 2 -distribution according to -Coulter Counter -"ALPINE" screen % by 63 mu m weight -Cu abrasion in 10% mg 5-30 5-30 -strength glycerol disper- -sion -Lightness value A % 86-96 90-96 -Viscosity in a 30% 30,000-60,000 30,000-60,000 -strength dispersion in a -1:1 glycerol/water -mixture, Brookfield RTV, -Sp5 - The dental-care composition may additionally contain 0.5-5% by weight of polyethylene glycol or 2-14% by weight of a precipitated silica which in 15% strength dispersion in a glycerol/water mixture has a viscosity of not less than 30,000 mPa.s. Pyrogenic silica can also be employed successfully to regulate the viscosity of the product.
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公开(公告)号：DK162188B
公开(公告)日：1991-09-30
申请号：DK155482
申请日：1982-04-05
Applicant: DEGUSSA
Inventor： MUELLER KARL-HANS , NEUMUELLER MATTHIAS , TUERK GUENTHER
Abstract: A dental-care composition having improved shelf life in respect of rheology and abrasiveness, which as a novel feature, contains, as a cleansing agent, a bifunctional (thickening and abrasive) precipitated silica characterized by the following physico-chemical properties: -Pendulum - roller - mill Jet mill -BET surface area m2/g 15-110 15-110 -Tamped density g/l 150-750 90-650 -Secondary particle size FIG. 1 FIG. 2 -distribution according to -Coulter Counter -"ALPINE" screen % by 63 mu m weight -Cu abrasion in 10% mg 5-30 5-30 -strength glycerol disper- -sion -Lightness value A % 86-96 90-96 -Viscosity in a 30% 30,000-60,000 30,000-60,000 -strength dispersion in a -1:1 glycerol/water -mixture, Brookfield RTV, -Sp5 - The dental-care composition may additionally contain 0.5-5% by weight of polyethylene glycol or 2-14% by weight of a precipitated silica which in 15% strength dispersion in a glycerol/water mixture has a viscosity of not less than 30,000 mPa.s. Pyrogenic silica can also be employed successfully to regulate the viscosity of the product.
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公开(公告)号：FI112862B
公开(公告)日：2004-01-30
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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公开(公告)号：CA2255398A1
公开(公告)日：1999-06-10
申请号：CA2255398
申请日：1998-12-09
Applicant: DEGUSSA
Inventor： ESCH HEINZ , THOMAS KLAUS-PETER , RAUSCH RALF , OTTO KARIN , NEUMUELLER MATTHIAS , KUHLMANN ROBERT
Abstract: A precipitated silica which contains an active substance having a delayed, release of active substance is prepared by adding the active substance during preparation of the precipitated silica. The precipitated silica may be added to oral hygiene agents such as toothpastes, topical fluoride preparations, dental materials or medicinal chewing gums.
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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
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.
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Patent Agency Ranking
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.
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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.
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公开(公告)号：DE59100507D1
公开(公告)日：1993-11-25
申请号：DE59100507
申请日：1991-09-04
Applicant: DEGUSSA , CHEMICAL PHARMACEUTICAL RESEAR
Inventor： AGAIN IVAN PROF , BOYANOVA VERA PROF , OTTO KARIN DR , NEUMUELLER MATTHIAS , DIPPMANN HARALD
Abstract: The preparation for the care of the teeth consists of the customary known ingredients of a preparation for the care of the teeth and contains as abrasive component cellulose powder in place of customary known polishing particles.
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公开(公告)号：DE3639844A1
公开(公告)日：1988-06-01
申请号：DE3639844
申请日：1986-11-21
Applicant: DEGUSSA
Inventor： MUEHLEMANN HANS R PROF DR , MUELLER KARL-HANS DR , NEUMUELLER MATTHIAS
IPC: A61K8/22 , A61K8/25 , A61K8/26 , A61Q11/00 , C01B33/154 , C01B33/193 , A61K7/16
Abstract: The toothpaste for preventative dental hygiene contains besides a solvent as abrasive a mixture of synthetically prepared precipitated silica and perlite. Used as solvent is a mixture consisting of glycerol (86%) and water.
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公开(公告)号：AT24396T
公开(公告)日：1987-01-15
申请号：AT82101472
申请日：1982-02-26
Applicant: DEGUSSA
Inventor： MUELLER KARL-HANS DR , NEUMUELLER MATTHIAS , TUERK GUENTER DR
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