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    71.
    发明专利
    未知

    公开(公告)号：BR0300154A

    公开(公告)日：2003-09-09

    申请号：BR0300154

    申请日：2003-01-29

    Applicant: DEGUSSA

    Inventor： SCHOLZ MARIO ,  KEMPF MICHAEL ,  PANZ CHRISTIAN ,  KAWAMOTO KENICHI

    IPC: C09K3/10 ,  C08K3/36 ,  C08K5/54 ,  C08L83/04 ,  C09C1/30 ,  C08K3/34

    Abstract: Introduction of hydrophobic silicic acid of low water content and low moisture uptake into a single component room temperature crosslinked silicone rubber formulation, improves the mechanical properties, the whiteness grade and the rheological properties without affecting the storage stability. A silicone rubber formulation (RTV-1K) contains: (a) 0.5-60 wt.% of hydrophobic silicic acid having the properties: C content less than 3.1%, methanol utilizability greater than 60%, remission value greater than 94%, BET/STAB ratio greater than 1 and less than 3, DBP take up less than 230 g/100 g, BET surface 50-110 m2/g, STAB surface greater than 30 m2/g, water vapor absorption at 30 degrees C and 30 RF less than 1.3 and at 30 degrees C and 70 REF less than 1.7, and (b) 40-99.5 wt.% of an organopolysiloxane of formula (I). ZnSiR3-n-O-(SiR2O)x-SiR3-nZ'n (I) R = alkyl, acetoxy, oxime, alkoxy, amido, aryl, 1-50C alkenyl, optionally substituted with O, S, F, Cl, Br or I, and/or polystyrene, polyvinyl acetate, poly(meth)acrylate- or polyacrylonitrile with 50-10,000 repeating units; Z = OH, Cl, Br, I or up to 20 C acetoxy, amino, amido, aminoxy, oxime, alkoxy, alkenyloxy, acryloxy or phosphate, where the organic residue can have up to 20 C; Z' = oxime, alkoxy, amido or acetoxy; n = 1-3; and x = 100-15,000.

    78.
    发明专利
    未知

    公开(公告)号：AT537110T

    公开(公告)日：2011-12-15

    申请号：AT08854777

    申请日：2008-10-24

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： PANZ CHRISTIAN ,  MEIER KARL ,  TOTH JAMES J ,  ROMAINE MATTHEW ,  SCHOLZ MARIO ,  TITZ GUIDO

    IPC: C01B33/12 ,  C01B33/143 ,  C01B33/18 ,  C01B33/187 ,  C01B33/193

    Abstract: A precipitated silica having a d50-value of from 150 to 2000 nm, a d90-value of from 500 to 7000 nm, a silanol group density of from 2.5 to 8 OH/nm2, and a modified tapped density of less than or equal to 70 g/l is useful for thickening and providing thixotropy in liquid systems and shows superior efficiency at thickening and creating thixotropy compared to existing grades of precipitated silica. The precipitated silica functions best as a thixotrope in non-polar or intermediate polar liquid systems such as unsaturated polyester (UPE) resin systems.

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