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.

公开(公告)号：ZA9101161B

公开(公告)日：1991-11-27

申请号：ZA9101161

申请日：1991-02-15

Applicant: DEGUSSA

Inventor： WOLFF SIEGFRIED ,  SIEGFRIED WOLFF ,  GOERL UDO ,  UDO GOERL ,  MEIER KARL ,  KARL MEIER

IPC: C08J3/20 ,  C08K9/00 ,  C08K9/04 ,  C08L21/00 ,  C09C1/30 ,  C09C3/04 ,  C09J109/00 ,  C09J121/00 ,  C08K ,  C08L

CPC classification number: C09C1/3036 ,  C01P2004/50 ,  C01P2006/12 ,  C08K9/04 ,  Y10S156/91 ,  Y10T156/1766