Patents by Inventor Oliver Schaefer

Oliver Schaefer 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).

  • Crosslinkable siloxane urea copolymers
    Patent number: 7737242
    Abstract: Crosslinkable polymers containing organopolysiloxane, polyurea, and/or polyurethane moieties further contain at least one photopolymerizable ethylenically unsaturated group and a photoinitiator which allows crosslinking upon exposure to radiation.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: June 15, 2010
    Assignee: Wacker Chemie AG
    Inventors: Wolfgang Ziche, Oliver Schaefer
  • REDISPERSIBLE CORE-SHELL POLYMERS AND A PROCESS FOR PREPARING THEM
    Publication number: 20100086783
    Abstract: Redispersible core/shell elastomeric particles are prepared by a process wherein a silicone elastomer core is covered with a second silicone shell, followed by an organic polymer shell.
    Type: Application
    Filed: January 25, 2008
    Publication date: April 8, 2010
    Applicant: WACKER CHEMIE AG
    Inventors: Oliver Schaefer, Helmut Oswaldbauer, Christina Bauer
  • Process for preparing diorganopolysiloxanes
    Patent number: 7683198
    Abstract: Mono-hydroxyl-functional organopolysiloxanes are prepared with minimal byproducts and increased storage stability by reaction of cyclotrisiloxanes with sil(ox)anols containing less than 1 weight percent water in the presence of heterogenous alkali metal or alkaline earth metal oxide or carbonate catalysts.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: March 23, 2010
    Assignee: Wacker Chemie AG
    Inventors: Oliver Schaefer, Sandra Bachmaier
  • LAMINATES COMPRISING THERMOPLASTIC POLYSILOXANE-UREA COPOLYMERS
    Publication number: 20100047589
    Abstract: Photovoltaic modules are prepared by laminating an active device to a glass cover plate by means of a thermoplastic siloxane copolymer. The siloxane copolymer provides good adhesion, freedom from water absorption, and yet can be reworked either in the field or during recycling of the solar cell components.
    Type: Application
    Filed: October 9, 2007
    Publication date: February 25, 2010
    Applicant: WACKER CHEMIE AG
    Inventors: Christian Ochs, Ralph Hiemeyer, Oliver Schaefer
  • IRIDIUM-CATALYZED PRODUCTION METHOD FOR ORGANOSILICON COMPOUNDS
    Publication number: 20100022793
    Abstract: Alkyl silanes are prepared by silylating an unsaturated hydrocarbon with an Si—H functional silane employing an iridium chloride coordination compound as a catalyst and a polymeric polyene as a cocatalyst. Reaction bottoms can be worked up to provide an iridium-containing composition which remains catalytically active.
    Type: Application
    Filed: February 25, 2008
    Publication date: January 28, 2010
    Applicant: WACKER CHEMIE AG
    Inventors: Andreas Bauer, Oliver Schäfer
  • METHOD FOR PRODUCING GRANULES FROM THERMOPLASTIC SILOXANE POLYMERS
    Publication number: 20100007039
    Abstract: Non-blocking polymer pellets are produced in spherical or nearly spherical form by introducing molten polymer directly from a polymerization reactor into a coolant and pelletizing just prior to, simultaneously with, or immediately following entry into the coolant such that residual heat allows the polymer pellets to change their shape to eliminate sharp corners, particularly cylindrical shapes, and assume a spherical-type morphology.
    Type: Application
    Filed: November 24, 2005
    Publication date: January 14, 2010
    Applicant: WACKER CHEMIE AG
    Inventors: Ernst Selbertinger, Oliver Schaefer
  • Hydroxyalkyl-functionalized fillers
    Patent number: 7576229
    Abstract: Hydroxyalkyl-functionalized particles are prepared by reacting a cyclic siloxy compound containing a glycol residue, an oxygen of the glycol residue bonded to silicon of a siloxy group through an intermediary methylene or substituted methylene linking group.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: August 18, 2009
    Assignee: Wacker Chemie AG
    Inventors: Oliver Schaefer, Christopher Briehn, Torsten Gottschalk-Gaudig
  • Method for the production of organosiloxanes modified by a phosphonic acid ester
    Patent number: 7491784
    Abstract: Phosphone ester modified organosilicon compounds are prepared by reacting phosphonic ester-functionalized alkoxysilane with a silanol-functional organosilicon compound. The product is produced in high yield and purity.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: February 17, 2009
    Assignee: Wacker Chemie AG
    Inventors: Oliver Schäfer, Hans-Joachim Luckas
  • Process for preparing aminoalkysilanes
    Patent number: 7459576
    Abstract: Useful products are recovered from the bottoms of aminoalkylsilane production in high yield and purity by reaction with alcohol, increasing the economics of aminoalkylsilane synthesis.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: December 2, 2008
    Assignee: Wacker Chemie AG
    Inventors: Andreas Bauer, Oliver Schäfer
  • Polyester-Polysiloxane Copolymers and Process for their Preparation
    Publication number: 20080255317
    Abstract: Polyester/polysiloxane copolymers are prepared by ring-opening synthesis of hydroxyalkyl- or aminoalkyl functional organopolysiloxanes from a cyclic silazane and an Si—OH functional polysiloxane, followed by reaction with a cyclic lactone such as a caprolactone. The process tolerates functional groups on the polysiloxane segments which are not possible in other synthetic methods.
    Type: Application
    Filed: October 13, 2006
    Publication date: October 16, 2008
    Applicant: WACKER CHEMIE AG
    Inventors: Oliver Schaefer, Sandra Bachmaier
  • Process for Preparing Diorganopolysiloxanes
    Publication number: 20080167487
    Abstract: Mono-hydroxyl-functional organopolysiloxanes are prepared with minimal byproducts and increased storage stability by reaction of cyclotrisiloxanes with sil(ox)anols containing less than 1 weight percent water in the presence of heterogenous alkali metal or alkaline earth metal oxide or carbonate catalysts.
    Type: Application
    Filed: May 11, 2006
    Publication date: July 10, 2008
    Applicant: WACKER CHEMIE AG
    Inventors: Oliver Schaefer, Sandra Bachmaier
  • Foams Containing Silicon
    Publication number: 20080051482
    Abstract: Both flexible and rigid foams may be prepared by reacting di- or polyisocyanates with organopolysiloxanes which are prepared by reaction of silanol-terminated organopolysiloxanes with organosilicon compounds containing alkyleneoxy or alkylenamino groups bonded on both ends to silicon, thus resulting in organopolysiloxanes having 95% or more of aminoalkyl or hydroxyalkyl terminal groups.
    Type: Application
    Filed: September 13, 2007
    Publication date: February 28, 2008
    Applicant: CONSORTIUM FUER ELEKTROCHEMISCHE INDUSTRIE GMBH
    Inventors: Volker Stanjek, Oliver Schaefer, Bernd Pachaly
  • Continuous production of aminofunctional siloxanes
    Publication number: 20070197757
    Abstract: Aminoalkyl-functional siloxanes are prepared efficiently by a continuous process in which a cyclic silazane and a hydroxyl-functional siloxane are fed continuously to a reaction zone, reacted in the reaction zone, and the aminoalkyl product and any unreacted starting materials are removed from the reaction zone. The process is effective even with hydroxyl-functional siloxanes having a very low weight percentage of hydroxyl groups.
    Type: Application
    Filed: February 24, 2005
    Publication date: August 23, 2007
    Applicant: Consortium fuer elecktrochemische Industrie GmbH
    Inventors: Oliver Schaefer, Sabine Delica
  • Organopolysiloxane/polyurea/polyurethane block copolymers
    Patent number: 7153924
    Abstract: The invention relates to a process for preparing organopolysiloxane/polyurea/polyurethane block copolymers, and also to the use of the organopolysiloxane/polyurea/polyurethane block copolymers prepared by means of the process.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Wacker Chemie AG
    Inventors: Juergen Kuepfer, Oliver Schaefer
  • Novel organosilicon compounds and a method for their production
    Publication number: 20060247409
    Abstract: Phosphorous-modified organosilicon compounds containing silicon-bound methoxy groups and a methylene spacer linking silicon to the phosphorous moiety are easily prepared in high yield and exhibit excellent hydrolysis rates. The compounds are useful, inter alia, as stabilizers in anti-freeze compositions, as cohydrolysis reactants in preparation of modified silicone resins, and in coatings.
    Type: Application
    Filed: July 1, 2004
    Publication date: November 2, 2006
    Applicant: CONSORTIUM FUER ELEKTROCHEMISCHE INDUSTRIE GMBH
    Inventors: Oliver Schaefer, Andreas Bauer, Markus Kriegbaum, Sandra Rachl
  • Laminated glass with polysiloxane-urea copolymer
    Publication number: 20060204765
    Abstract: A laminated glass comprises: A) at least one layer consisting of inorganic or organic glass and B) at least one layer consisting of a polysiloxane-urea copolymer which is obtained by reacting a mixture of linear polysiloxanes of general formula Q-T-SiR2O—(SiR2O)n—SiR2-T-Q and branched polysiloxanes of general formula (Q-T-SiR2O1/2)a(Q-T-SiRO2/2)b(Q-T-SiO3/2)c(R3SiO2/2)d(R2SiO2/2)c(RSiO3/2)f(SiO4/2)g with polyfunctional isocyanates. The laminates exhibit excellent moisture resistance.
    Type: Application
    Filed: April 1, 2004
    Publication date: September 14, 2006
    Applicant: Wacker-Chemie GmbH
    Inventors: Uwe Scheim, Oliver Schäfer, Ernst Selbertinger
  • Method for the production of organopolysiloxane copolymers and use thereof
    Publication number: 20060194937
    Abstract: A method for the solvent-free, continuous production of organopolysiloxane/polyurea/polyurethane block copolymers involves reacting amino-functional siloxanes with polyisocyanates and organic polyhydroxy compounds. The organopolysiloxane/polyurea/polyurethane block copolymers produced by means of the inventive method are useful for numerous purposes, for example as elastomers, caulks, sealants, and films.
    Type: Application
    Filed: March 11, 2004
    Publication date: August 31, 2006
    Inventors: Oliver Schäfer, Sabine Delica
  • Silane-terminated polydiorganosiloxane urethane copolymer
    Patent number: 7060760
    Abstract: Curable, silane-terminated polydiorganosiloxane-urethane copolymers exhibit the beneficial properties of isocyanate-terminated polysiloxane-urethane copolymers without the detriments associated with free isocyanate groups.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: June 13, 2006
    Assignee: Consortium fur elektrochemische Industrie GmbH
    Inventors: Wolfram Schindler, Oliver Schäfer, Volker Stanjek, Bernd Pachaly
  • Organopolysiloxane/polyurea/polyurethane block copolymers
    Patent number: 7026424
    Abstract: Organopolysiloxane/polyurea/polyurethane block copolymer elastomers exhibiting improved physical properties are prepared by reacting diisocyanates with aminoalkyl-functional organopolysiloxanes containing substantially no cyclic siloxanes, prepared by reacting a cyclic silazane with a bis(hydroxy)-organopolysiloxane. Traditional hydroxyl and amino-functional chain extenders may be reacted as well, to produce a wide range of block copolymer elastomers.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: April 11, 2006
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Oliver Schäfer, Sabine Delica, Wolfram Schindler, Bernd Pachaly
  • Moisture crosslinking elastomer composition
    Patent number: 7026425
    Abstract: The invention relates to moisture cross-linking compositions containing (A) 100 parts per weight of a silane-terminated polydiorganosiloxane-urea/urethane copolymer of general formula (1), and (B) between 0.1 and 20 parts per weight of silane of general formula (3): ?-(CH2)e—Si(R2)3-f(CH3)f, in which R, X, A, Y, D, B, W, n, a, b, c, d, ?, R2, e and f are defined as per claim 1.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: April 11, 2006
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Wolfram Schindler, Oliver Schäfer, Martina Chatzinerantzis, Bernd Pachaly