中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

50 records (took 0.019 seconds)

    31.
    发明专利
    未知

    公开(公告)号：DE59203040D1

    公开(公告)日：1995-08-31

    申请号：DE59203040

    申请日：1992-12-10

    Applicant: DEGUSSA

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

    IPC: C08J5/10 ,  C08K3/36 ,  C08K5/13 ,  C08K13/02 ,  C09C1/30

    Abstract: The invention relates to blends of resorcinol and silica which are employed as adhesion promoter for improving the adhesion between textile or metallic strengthening supports and rubber or plastics and have a greatly restricted sublimation behaviour with respect to resorcinol.

    32.
    发明专利
    未知

    公开(公告)号：DE4427137A1

    公开(公告)日：1995-04-13

    申请号：DE4427137

    申请日：1994-07-30

    Applicant: DEGUSSA

    Inventor： ESCH HEINZ ,  GOERL UDO DR ,  KUHLMANN ROBERT ,  RAUSCH RALF DR

    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.

    38.
    发明专利
    未知

    公开(公告)号：AT225354T

    公开(公告)日：2002-10-15

    申请号：AT97110969

    申请日：1997-07-02

    Applicant: DEGUSSA

    Inventor： GOERL UDO DR ,  LAMBERTZ HORST

    IPC: C08L19/00 ,  B60C1/00 ,  C07F7/08 ,  C07F7/18 ,  C08G77/48 ,  C08K5/548 ,  C08L7/00 ,  C08L21/00 ,  C08L83/08 ,  C08K5/54

    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.

Patent Agency Ranking