Patents by Inventor Gerd Rainhard Zezulka

Gerd Rainhard Zezulka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the production of organosilylalkyl polysulfanes
    Patent number: 6465672
    Abstract: The invention relates to a process for the production of organosilylalkyl polysulfanes by reacting an organosilylalide alkyl halide and an anhydrous or virtually anhydrous ionic sulfide and elementary sulfur, wherein the elementary sulfur and organosilylalkyl halide are suspended in a polar organic solvent and the ionic sulfide is added to this suspension.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: October 15, 2002
    Assignee: Degussa AG
    Inventors: Rudolf Michel, Jorg Munzenberg, Werner Will, Gerd Rainhard Zezulka
  • Process for the preparation of organosilylalkylpolysulfanes
    Patent number: 6423859
    Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2Sx (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: July 23, 2002
    Assignee: Degussa AG
    Inventors: Alfred Alig, Christoph Batz-Sohn, Ulrich Deschler, Rudolf Michel, Jörg Münzenberg, Raymund Sonnenschein, Werner Will, Gerd Rainhard Zezulka, Karl-Heinz Rützel
  • Organosilicon compound, a process for its preparation and its use
    Patent number: 6380411
    Abstract: Organosilicon compounds of general formula (I) R1R2R3Si—R4—S—Zn—S—R4—SiR1R2R3  (I) wherein R1, R2, R independently, represent H, a halogen, alkyl or alkoxy and R4 represents an alkylidene group, their preparation and their use in rubber mixtures.
    Type: Grant
    Filed: October 20, 2000
    Date of Patent: April 30, 2002
    Assignee: Degussa-Huls AG
    Inventors: Hans-Detlef Luginsland, Christoph Batz-Sohn, Jörg Münzenberg, Gerd Rainhard Zezulka
  • PROCESS FOR THE PREPARATION OF ORGANOSILYLALKYLPOLYSULFANES
    Publication number: 20020049347
    Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2SX (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.
    Type: Application
    Filed: July 13, 2001
    Publication date: April 25, 2002
    Inventors: Alfred Alig, Christoph Batz-Sohn, Ulrich Deschler, Rudolf Michel, Jorg Munzenberg, Raymund Sonnenschein, Werner Will, Gerd Rainhard Zezulka, Karl-Heinz Rutzeil
  • Process for the production of organosilylalkyl polysulfanes
    Publication number: 20010037034
    Abstract: The invention relates to a process for the production of organosilylalkyl polysulfanes by reacting an organosilylalide alkyl halide and an anhydrous or virtually anhydrous ionic sulfide and elementary sulfur, wherein the elementary sulfur and organosilylalkyl halide are suspended in a polar organic solvent and the ionic sulfide is added to this suspension.
    Type: Application
    Filed: March 1, 2001
    Publication date: November 1, 2001
    Inventors: Rudolf Michel, Jorg Munzenberg, Werner Will, Gerd Rainhard Zezulka
  • Process for the preparation of sulfur- and phosphorus-containing organosilicon compounds
    Patent number: 6274753
    Abstract: Process for the preparation of sulfur- and phosphorus-containing compounds of the formula: [R1n(R2O)3−n—Si—Alk—S—]3P═S in which halogen-containing silanes of the formula R1n(R2O)3−n—Si—Alk—Hal are reacted with phosphorus pentasulfide (P4S10) and a metal sulfide.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: August 14, 2001
    Assignee: Degussa AG
    Inventors: Roland Krafczyk, Jörg Münzenberg, Gerd Rainhard Zezulka