公开(公告)号：DE3639845A1

公开(公告)日：1988-06-01

申请号：DE3639845

申请日：1986-11-21

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 ,  C01B33/18

公开(公告)号：CA1189681A

公开(公告)日：1985-07-02

申请号：CA465709

申请日：1984-10-17

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  KUHLMANN ROBERT ,  TURK GUNTER ,  BECKER ADAM

IPC: C01B33/12

Abstract: Precipitated silicas having the following physicochemical characteristic data: according to Fig. 1 are produced by a process in which an original suspension of precipitated silica produced according to German Auslegeschrift No. 1,467,019 is diluted and an alkali metal silicate solution, sulphuric acid and water are simultaneously added, the pH value being kept constant between 7 and 9. The precipitated silicas are then filtered, washed, dried and micronized by means of a micronizer. Because of their abrasiveness the precipitated silicas can be used as polishing agents and abrasives and the micronized silicas may be used as polishing agents, abrasives and thickeners in toothpastes.

公开(公告)号：CA1183672A

公开(公告)日：1985-03-12

申请号：CA400097

申请日：1982-03-31

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  KUHLMANN ROBERT ,  TURK GUNTER ,  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 ,  C01B33/18

Abstract: Precipitated silicas having thc following physiocochemical characteristic data: are produced by a process in which an original suspension of precipitated silica produced according to German Auslegeschrift No. 1,467,019 is diluted and an alkali metal silicate solution, sulphuric acid and water are simultaneously added, the pH value being kept constant between 7 and 9. The precipitated silicas are then filtered, washed, dried and micronized by means of a bowl mill. Because of their abrasiveness the precipitated silicas can be used as polishing agents and abrasives and the rnicronized silicas may be used as polishing agents, abrasives and thickeners in toothpastes.

公开(公告)号：DE3114493A1

公开(公告)日：1982-10-28

申请号：DE3114493

申请日：1981-04-10

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  KUHLMANN ROBERT ,  TUERK GUENTER DIPL CHEM DR ,  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 ,  C01B33/18

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.

公开(公告)号：CA1109640A

公开(公告)日：1981-09-29

申请号：CA281471

申请日：1977-06-27

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  ESCH HEINZ ,  KUHLMANN ROBERT ,  BODE RUDOLF ,  REISERT ARTHUR ,  BUHLER HARALD ,  TURK GUNTER

IPC: C08K3/00 ,  C01B33/12 ,  C01B33/18 ,  C01B33/193 ,  C08K3/34 ,  C08K3/36 ,  C08L83/00 ,  C08L83/04 ,  C09C1/00 ,  C09C1/28 ,  C09C1/30

Abstract: The present invention provides a hydrophobized silicic acid having the following characteristics BET surface area acc. to DIN 66 131 m2/g 110 ? 30 Mean size of primary particles from EM records nm 15 - 22 Loss on drying acc. to DIN 55 921 after 2 hrs at 105.degree. C %

公开(公告)号：DE2716225A1

公开(公告)日：1978-10-26

申请号：DE2716225

申请日：1977-04-13

Applicant: DEGUSSA

Inventor： NAUROTH PETER ,  KUHLMANN ROBERT ,  BODE RUDOLF DIPL PHYS ,  TUERK GUENTER DIPL CHEM DR ,  REISERT ARTHUR

IPC: C01B33/193 ,  C08K3/38 ,  C09C1/30 ,  C01B33/14 ,  C08K3/34 ,  C08L83/04

Abstract: Pptd. silica contg. B has the following properties: BET surface are (DIN 66 131) 140 plus-or-minus 60 mg2/g.; loss on drying (DIN 55 921) 2.0-4.0 wt. %; less on calcination (DIN 55 921) 2.5 plus-or-minus 1.0 wt. %; pH (DIN 53 200) 4.0-7.0; conductivity in 4% aq. dispersion 300 muS; tamped density (DIN 53 194) 110 plus-or-minus 4.0 g./l.; B2O3 content 4-20 wt. %; SO3 content 0.25-wt. % and Na2O content 0.25 wt. % after drying 2 hrs. at 105 degrees C. This material is claimed for use as filler in diorganopolysiloxane-based compsns. which cure to elastomers. This filler, like B2O3 and its cpds., effects the condens. of silanol gps. at elevated temp., giving bounding putty. It avoids the danger of higher B cpds., which can be toxic in vapour form, evaporating or diffusing from the mixt.