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Thurn Friedrich, Burmester Kurt, Pochert Johannes, Wolff Siegfried: Rubber compositions containing silica and an organosilane. Deutsche Gold und Silber Scheideanstalt vormals Roessler, Cushman Darby & Cushman, March 25, 1975: US3873489 (197 worldwide citation)

Sulfur containing organosilicon compounds having the formula:Z--Alk--S.sub.n --Alk--Zin which Z is: ##SPC1##Where R.sub.1 is alkyl of 1 to 4 carbon atoms cyclohexyl or phenyl and R.sub.2 is alkoxy of 1 to 8 carbon atoms, cycloalkoxy of 5 to 8 carbon atoms or alkylmercapto of 1 to 8 carbon atoms, alk ...


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Wolff Siegfried Dr, Goerl Udo Dr: With organosilicium-compound chemically modified carbon blacks, method for their preparation and their use.. Degussa, January 29, 1992: EP0468140-A2 (24 worldwide citation)

The invention relates to the products of the reaction of a carbon black and one or more organosilicon compound(s) of the formula Rn1(RO)3-nSi-(alkyl) (II> or Rn1(RO)3-nSi-(alkenyl) (III), to the preparation of these products, and to their use as active fillers in sulphur- or peroxide-crosslinkable r ...


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Wolff Siegfried, Gorl Udo: A process for the production of vulcanizable moulding compounds and to the moulding compounds produced by this process. Degussa, March 10, 1993: GB2259303-A (17 worldwide citation)

In a process for the production of vulcanizable moulding compounds consisting of one or more natural or synthetic rubbers or polymers the quantity of accelerators from the class of thiurams and/or dithiocarbamates is reduced to half the quantity originally required through the use of 3-thiocyanatopr ...


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Wolff Siegfried Dr, Goerl Udo Dr, Deusser Hans Dr: Method of preparing fillers which are modified by organosilicon compounds, the products thus obtained and their use.. Degussa, August 21, 1991: EP0442143-A1 (14 worldwide citation)

The invention relates to a two-step method for the surface modification of natural or synthetic oxide or silicate fillers using organosilicon compounds of the formulae [R@ (R0)3-nSi - (Alk)m-(Ar)p]2 [S] x or [R@ (R0)3-nSi - (Alk)m-(Ar)p] SCN, in which the filler and compound are intensively mixed wi ...


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Kerner Dieter Dr, Kleinschmit Peter Dr, Parkhouse Alan, Wolff Siegfried: Surface-modified natural oxidic or silicic fillers, method for their preparation and their use.. Degussa, December 5, 1984: EP0126871-A1 (7 worldwide citation)

Die Erfindung betrifft die Modifizierung von natürlichen oxidischen oder silikatischen Füllstoffen mit wasserunlöslichen, schwefelhaltigen Organosiliciumverbindungen. Die Füllstoffe werden zu diesum Zweck in eine wässrige Suspension überführt und mit den Organosiliciumverbindungen gegebenenfalls in ...


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Wolff Siegfried Dr, Panenka Rainer Dr, Haddeman Marinus, Nakahama Hidenari: Vulcanizable epdm rubber compositions.. Degussa, June 23, 1993: EP0547344-A1 (5 worldwide citation)

The rubber mixtures of this invention contain a non-conjugated ethylene-propylene-diene rubber or a blend of a non-conjugated ethylene-propylene-diene rubber with a diene rubber, a specific alkoxy silane compound and an amorphous silicic acid having a specific surface area of between 5 and 100 m/g ( ...


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Hellwig Georg Dr, Stober Reinhard Dr, Klatte Christoph, Deschler Ulrich Dr, Wolff Siegfried Dr, Gorl Udo Dr: Bis(2,4-organylthio-s-triazin-6-yl)polysulphanes, method for their preparation and vulcanisable rubber compositions containing them.. Degussa, December 27, 1989: EP0347524-A2 (5 worldwide citation)

The invention relates to bis(2,4-organylthio-s-triazin-6-yl) polysulphanes of the general formula (I) prepared from compounds of the general formula (II) and an ammonium or alkali metal polysulphide, and to the use of compounds of this type as accelerators in vulcanisable rubber mixtures.


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Wolff Siegfried Dipl Chem, Golombeck Paul: Elastic moulding composition, method for its preparation and moulding, and its use.. Degussa, November 28, 1984: EP0126186-A1 (5 worldwide citation)

Die Erfindung betrifft eine elastische Formmasse auf der Basis von thermoplastischem Kautschuk, die mindestens einen silikatischen Füllstoff und Organosiliciumverbindungen mit mindestens einer Alkoxygruppe enthält.


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Wolff Siegfried Dr, Goerl Udo Dr: Process for producing vulcanised carbon black-filled plastics and rubber compositions.. Degussa, December 23, 1992: EP0519188-A1 (3 worldwide citation)

The invention relates to a process for the preparation of carbon black-filled plastic and rubber mixtures, in which an organosilicon compound is employed and is reacted in situ with the carbon black.