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    Acido silícico de precipitación con una distribución especial de tamaños de poros
    2.
    发明专利
    Acido silícico de precipitación con una distribución especial de tamaños de poros 未知

    公开(公告)号：ES2391569T3

    公开(公告)日：2012-11-27

    申请号：ES06115480

    申请日：2006-06-14

    Applicant: DEGUSSA ,  EVONIK DEGUSSA GMBH

    Inventor： STENZEL OLEG ,  LUGINSLAND HANS-DETLEF ,  UHRLANDT STEFAN ,  WEHMEIER ANDRE

    IPC: C01B33/193

    Abstract: Procedimiento para la producción de ácidos silícicos de precipitación, caracterizado porque consecutivamente a) se dispone previamente una solución acuosa de un silicato de metal alcalino y/o de metal alcalino-térreo y/o de una base orgánica y/o inorgánica, teniendo la carga previa un índice de álcali de 20 a 40, b) en esta carga previa se añaden dosificadamente mediando agitación a 55 hasta 85 ºC al mismo tiempo un silicato de metal alcalino y/o de metal alcalino-térreo y un agente de acidificación hasta llegar al aumento de la viscosidad, c) se detiene la adición dosificada durante 35 hasta 85 minutos, preferiblemente mediando mantenimiento de la temperatura alcanzada al final de la etapa b), d) a continuación se añaden dosificadamente al mismo tiempo un silicato de metal alcalino y/o de metal alcalino-térreo y un agente de acidificación a una temperatura de 55 hasta 85 ºC, de manera preferida a la misma temperatura que al final de la etapa b) o c), hasta que se haya alcanzado un contenido de materiales sólidos de 90 a 140 g/l, g) la suspensión obtenida se sigue agitando durante 1 a 120 minutos a 80 hasta 98 ºC, h) se acidifica con un agente de acidificación a un valor del pH de 2,5 a 5,0 y i) se filtra y se seca.

    4.
    发明专利
    未知

    公开(公告)号：DE50311058D1

    公开(公告)日：2009-02-26

    申请号：DE50311058

    申请日：2003-07-23

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： UHRLANDT STEFAN ,  WEHMEIER ANDRE ,  LUGINSLAND DETLEF ,  STENZEL OLEG

    IPC: C01B33/193 ,  B60C1/00 ,  C01B33/18 ,  C08K3/36 ,  C08K9/06 ,  C08L21/00 ,  C09C1/30

    Abstract: Precipitated silica (I) has the following characteristics: BET surface area of 178-302 m 2>/g; CTAB surface area >= 170 m 2>/g; DBP-number 200-300 g/(100 g); Sears number V 2 10-35 ml/(5 g). Independent claims are also included for the following: (1) preparation of (I); (2) elastomeric mixtures, vulcanized rubber mixtures and/or vulcanizates containing (I) as above; (3) tires, tires for commercial vehicles, tires for motor cycles, tires for high speed commercial vehicles, all containing (I) as above.

    6.
    发明专利
    未知

    公开(公告)号：BRPI0603907A

    公开(公告)日：2007-04-27

    申请号：BRPI0603907

    申请日：2006-09-06

    Applicant: DEGUSSA

    Inventor： STENZEL OLEG ,  LUGINSLAND HANS-DETLEF ,  UHRLANDT STEFAN ,  WEHMEIER ANDRE

    IPC: C01B33/12 ,  C08C19/25 ,  C09C1/30 ,  C09C3/12

    Abstract: Preparation of precipitated silicic acid comprises (a) subjecting an aqueous solution of an alkali- and/or earth alkaline silicate and/or an organic or inorganic base; (b) simultaneously adding an alkali- and/or alkaline-earth silicate and an acidifying agent to increase the viscosity; (c) terminating the reaction after 35-85 minutes; (d) simultaneously adding an alkali- and/or alkaline-earth silicate and an acidifying agent to attain a solid content; (e) stirring the obtained suspension; (f) adjusting the pH by adding the acidifying agent; and (g) filtering and (h) drying. Preparation of precipitated silicic acid comprises: (a) subjecting an aqueous solution of an alkali- and/or earth alkaline silicate and/or an organic or inorganic base, where the subjected mixture exhibits the alkali number of 20-40; (b) simultaneously adding an alkali- and/or earth alkaline silicate under stirring at 55-85[deg]C and an acidification agent to increase the viscosity of the mixture; ( (c) terminating the reaction after the addition of mixture that takes place for 35-85 minutes, preferably after reacting the temperature of step (b); (d) simultaneously adding an alkali- and/or alkaline-earth silicate and an acidifying agent under agitation at 55-85[deg]C, to attain a solid content of 90-140 g/l; (e) stirring the obtained suspension for 1-120 minutes at 80-98[deg]C; (f) adjusting the pH of the solution to 2.5-5 by adding the acidifying agent; (g) filtering; and (h) drying. Independent claims are included for: (1) a precipitated silicic acid exhibiting physical-chemical parameters such as relative width (gamma ) of the pore size distribution of 4-10 (g nm)/ml, Brunauer, Emmett and Teller (BET)-surface 90-320 m 2>/g, cetylammonium bromide (CTAB) surface area of 100-200 m 2>/g, sears number (V2) of 25-40 ml/(5 g) and sears number (V2/CTAB) ratio of 0.18-0.28 ml/(5 m 2>); (2) a precipitated silicic acid, obtained by the above process; (3) a vulcanizable rubber mixtures and vulcanizate comprising the precipitated silicic acid as filler material; and (4) a tire, comprising at least a precipitated silicic acid.

    7.
    发明专利
    未知

    公开(公告)号：DE102005043201A1

    公开(公告)日：2007-03-15

    申请号：DE102005043201

    申请日：2005-09-09

    Applicant: DEGUSSA

    Inventor： STENZEL OLEG ,  BLUME ANKE ,  LUGINSLAND HANS-DETLEF ,  SCHMOLL RALF ,  THOMA HERBERT ,  UHRLANDT STEFAN ,  WEHMEIER ANDRE

    IPC: C01B33/18 ,  B60C1/00 ,  C01B33/193 ,  C08K3/36 ,  C08L21/00 ,  C09C3/12

    Abstract: Precipitated silicic exhibiting physical-chemical properties such as relative width (gamma ) of the pore size distribution of 4-10 (g nm)/ml, sears number (V2) of 28-40 ml/(5 g), sears number (V2/CTAB) ratio of 0.18-0.28 ml/(5 m 2>) and cetylammonium bromide (CTAB) surface area of 100-200 m 2>/g. Independent claims are included for: (1) the preparation of precipitated silicic acid, comprising (a) subjecting an aqueous solution of alkali or alkaline-earth silicate and/or an organic or an inorganic base, where the submittal exhibited an alkali number of 20-40, (b) adding alkaline and/or alkaline-earth silicate and acidifying agent into the submittal under intensive stirring at 55-85[deg]C to increase viscosity of the solution, (c) terminating the reaction after the addition that takes place for 35-85 minutes, preferably after reaching the temperature of step (b), (d) again adding alkali and/or alkaline-earth silicate and an acidifying agent under agitation at 55-85[deg]C to attain a solid content of 90-140 g/l, (e) adjusting pH of the solution to 2.5-5 by adding the acidifying agent and (f) filtering and drying; (2) vulcanizable rubber mixture and vulcanizate comprising the precipitated silicic acid as filler; and (3) a tire comprising at least a precipitated silicic acid.

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