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    21.
    发明专利
    未知

    公开(公告)号：FI944679A

    公开(公告)日：1995-04-08

    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

    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.

    24.
    发明专利
    未知

    公开(公告)号：BR0204114A

    公开(公告)日：2003-09-16

    申请号：BR0204114

    申请日：2002-10-09

    Applicant: DEGUSSA

    Inventor： GOERL UDO ,  STOBER REINHARD ,  SCHMITT MATTHIAS

    IPC: C08J3/16 ,  C08J3/12 ,  C08J3/215 ,  C08K3/36 ,  C08K9/06 ,  C08L21/00 ,  C08L21/02 ,  C08C1/00 ,  C08L19/00

    Abstract: Preparation of silicate and/or oxygenic filler-containing rubber powder or granulate, based on aqueous rubber emulsion or latex, involves suspension of silicate and/or filler, polysiloxane hydrophobizing agent and nonionic surfactant in water, adjustment of the pH to 2.5-7, separation of the deposited rubber powder from the solid particles, and drying the powdered or granulated product to a moisture content of less than 3%. A process for preparation of silicate and/or oxygenic filler-containing rubber powder or granulate based on aqueous rubber emulsion or latexes involves: (a) suspension of a silicate and/or oxygenic filler, polysiloxane hydrophobizing agent(s) (in amount 0.5-7% relative to the filler) and nonionic surfactant(s) (in amount 0.1-2% relative to the filler) at 10-60 degrees C in water, giving a suspension of density 0.5-5%, (b) addition of the rubber latex emulsion to the filler suspension with stirring, (c) adjustment of the pH of the aqueous mixture with an acid, preferably sulfuric acid or aluminum sulfate to a pH of 2.5-7, (d) separation of the deposited rubber powder from the process water by, for example, solid/liquid separation of the solid particles, (e) molding of the filter cake, and (f) drying of the powdered or granulated product to an end moisture content of less than 3%.

    25.
    发明专利
    未知

    公开(公告)号：FI107143B

    公开(公告)日：2001-06-15

    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

    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.

    27.
    发明专利
    未知

    公开(公告)号：TR199700642A2

    公开(公告)日：1998-02-21

    申请号：TR9700642

    申请日：1997-07-15

    Applicant: DEGUSSA

    Inventor： GOERL UDO ,  LAMBERTZ HORST

    IPC: C08L19/00 ,  B60C1/00 ,  C07F7/08 ,  C07F7/18 ,  C08G77/48 ,  C08K5/548 ,  C08L7/00 ,  C08L21/00 ,  C08L83/08 ,  C08L9/00

    Abstract: A mixture (I) of organosilane polysulphides (II) of formula (RO)3Si(CH2)xS-Sz-S(CH2)xSi(OR)3 (1) is new. The mixture contains 20 wt.% or less (1) when z = 2-6 and less than 80 wt.% (1) when z = 0. In (1), R = 1-8C alkyl, preferably 1-3C alkyl; x = 1-8; and z = 0-6. Also claimed are (i) preparation of sulphur, sulphur donor and accelerator vulcanised rubber mixtures containing one or more natural or man-made rubber, silicate, fillers, optionally carbon black and other components, the rubber, fillers, carbon black, optionally plasticiser, anti-oxidants, activators and (I) being mixed at 160-200 degrees C for 3-15 minutes followed by the addition of vulcanisation agents at 60-120 degrees C and mixing for a further 2-10 minutes to yield sheet or strips; (ii) tyre tread compounds with a high silicic acid content containing 4-10 parts weight (pts. wt.) (I) to 100 pts. wt. filler.

    MIXTURES OF ORGANOSILANE POLYSULPHANES AND METHOD OF MAKING RUBBER COMPOUNDS CONTAINING SUCH MIXTURES
    29.
    发明专利
    MIXTURES OF ORGANOSILANE POLYSULPHANES AND METHOD OF MAKING RUBBER COMPOUNDS CONTAINING SUCH MIXTURES 未知

    公开(公告)号：PL321154A1

    公开(公告)日：1998-01-19

    申请号：PL32115497

    申请日：1997-07-16

    Applicant: DEGUSSA

    Inventor： GOERL UDO ,  LAMBERTZ HORST

    IPC: C08L19/00 ,  B60C1/00 ,  C07F7/08 ,  C07F7/18 ,  C08G77/48 ,  C08K5/548 ,  C08L7/00 ,  C08L21/00 ,  C08L83/08 ,  C08L83/04

    Abstract: A mixture (I) of organosilane polysulphides (II) of formula (RO)3Si(CH2)xS-Sz-S(CH2)xSi(OR)3 (1) is new. The mixture contains 20 wt.% or less (1) when z = 2-6 and less than 80 wt.% (1) when z = 0. In (1), R = 1-8C alkyl, preferably 1-3C alkyl; x = 1-8; and z = 0-6. Also claimed are (i) preparation of sulphur, sulphur donor and accelerator vulcanised rubber mixtures containing one or more natural or man-made rubber, silicate, fillers, optionally carbon black and other components, the rubber, fillers, carbon black, optionally plasticiser, anti-oxidants, activators and (I) being mixed at 160-200 degrees C for 3-15 minutes followed by the addition of vulcanisation agents at 60-120 degrees C and mixing for a further 2-10 minutes to yield sheet or strips; (ii) tyre tread compounds with a high silicic acid content containing 4-10 parts weight (pts. wt.) (I) to 100 pts. wt. filler.

    ORGANIC SILANE POLYSULPHANE AND PROCESS FOR PRODUCING RUBBER MIXTURES CONTAINING THEM
    30.
    发明专利
    ORGANIC SILANE POLYSULPHANE AND PROCESS FOR PRODUCING RUBBER MIXTURES CONTAINING THEM 未知

    公开(公告)号：HU9701224D0

    公开(公告)日：1997-08-28

    申请号：HU9701224

    申请日：1997-07-17

    Applicant: DEGUSSA

    Inventor： GOERL UDO ,  LAMBERTZ HORST

    IPC: C08L19/00 ,  B60C1/00 ,  C07F7/08 ,  C07F7/18 ,  C08G77/48 ,  C08K5/548 ,  C08L7/00 ,  C08L21/00 ,  C08L83/08

    Abstract: A mixture (I) of organosilane polysulphides (II) of formula (RO)3Si(CH2)xS-Sz-S(CH2)xSi(OR)3 (1) is new. The mixture contains 20 wt.% or less (1) when z = 2-6 and less than 80 wt.% (1) when z = 0. In (1), R = 1-8C alkyl, preferably 1-3C alkyl; x = 1-8; and z = 0-6. Also claimed are (i) preparation of sulphur, sulphur donor and accelerator vulcanised rubber mixtures containing one or more natural or man-made rubber, silicate, fillers, optionally carbon black and other components, the rubber, fillers, carbon black, optionally plasticiser, anti-oxidants, activators and (I) being mixed at 160-200 degrees C for 3-15 minutes followed by the addition of vulcanisation agents at 60-120 degrees C and mixing for a further 2-10 minutes to yield sheet or strips; (ii) tyre tread compounds with a high silicic acid content containing 4-10 parts weight (pts. wt.) (I) to 100 pts. wt. filler.

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