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    62.
    发明专利
    未知

    公开(公告)号：DE102006048575A1

    公开(公告)日：2008-04-17

    申请号：DE102006048575

    申请日：2006-10-13

    Applicant: EVONIK DEGUSSA GMBH

    Inventor： MEYER JUERGEN ,  SCHOLZ MARIO

    IPC: C01B33/18 ,  C08K9/06 ,  C08L83/04 ,  C09C1/30

    Abstract: Surface-modified, fumed silica having the data: BET surface area, m2/g: 25-400; Average primary particle size, nm: 5-50; pH: 3-10; Carbon content, % by weight: 0.1-10; Potassium content (calculated as potassium oxide), % by weight: 0.000001-40; is prepared by subjecting a fumed silica to surface modification in the presence of potassium compounds. It can be used in LSR silicone rubber compositions as a filler.

    64.
    发明专利
    未知

    公开(公告)号：AT366285T

    公开(公告)日：2007-07-15

    申请号：AT02028949

    申请日：2002-12-24

    Applicant: DEGUSSA

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

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

    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.

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