Patents by Inventor Bernd Kray

Bernd Kray 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).

  • Method for producing lactamates by way of thin film evaporation
    Patent number: 8710217
    Abstract: A method is described for producing lactamates by reacting alcoholates with lactams, wherein a reaction mixture comprising at least one alcoholate and at least one lactam is subjected to thin film evaporation.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: April 29, 2014
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Wilhelm Laufer, Hans Kasper, Stefan Schattner, Klaus Allgoewer, Bernd Kray, Michael Wuehr
  • Preparation of cast polyamides using special activators
    Patent number: 8354492
    Abstract: The present invention relates to a system comprising a) at least one catalyst for the anionic polymerization of lactams, and b) at least one activator for the anionic polymerization of lactams, wherein the at least one activator is a cyclic isocyanate, at least one allophanate or a mixture thereof.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: January 15, 2013
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Bernd Kray, Andreas Kugler, Willhelm Laufer, Peter Schuster, Volker Wenzel
  • Process for preparing carbodiimides
    Publication number: 20120123062
    Abstract: A method for producing compounds comprising at least one carbodiimide group is described, by reacting at least one isocyanate-containing starting compound or a derivative thereof, wherein the method is conducted in at least two stages.
    Type: Application
    Filed: May 3, 2010
    Publication date: May 17, 2012
    Applicant: RHEIN CHEMIE RHEINAU GMBH
    Inventors: Wilhelm Laufer, Anke Blaul, Bernd Kray, Michael Wuehr
  • METHOD FOR PRODUCING LACTAMATES BY WAY OF THIN FILM EVAPORATION
    Publication number: 20120071648
    Abstract: A method is described for producing lactamates by reacting alcoholates with lactams, wherein a reaction mixture comprising at least one alcoholate and at least one lactam is subjected to thin film evaporation.
    Type: Application
    Filed: February 5, 2009
    Publication date: March 22, 2012
    Applicant: RHEIN CHEMIE RHEINAU GMBH
    Inventors: Wilhelm Laufer, Hans Kasper, Stefan Schattner, Klaus Allgoewer, Bernd Kray, Michael Wuehr
  • HOTMELT VISCOSITY STABILIZER
    Publication number: 20110172321
    Abstract: The invention relates to innovative viscosity stabilizers for hotmelts, to melt-viscosity-stable hotmelts comprising these viscosity stabilizers, to a process for preparing them and to their use.
    Type: Application
    Filed: October 6, 2010
    Publication date: July 14, 2011
    Applicant: RHEIN CHEMIE RHEINAU GmbH
    Inventors: Wilhelm Laufer, Bernd Kray, Peter Schuster, Christian Scheffner, Serdar Uestuenbas, Marc Leimenstoll, Peter Reichert, Eduard Mayer, Matthias Wintermantel
  • Carbodiimides and 2-(1,1-dimethylethyl)-6-[[3-(1,1-dimethylethyl)-2-hydroxy-5-methylphenyl]methyl-4-methylphenyl] acrylate as colour stabilizers in hot-melt adhesives
    Publication number: 20110092620
    Abstract: The present invention relates to hot-melt adhesive compositions comprising in addition to 2-(1,1-dimethylethyl)-6-[[3-(1,1-dimethylethyl)-2-hydroxy-5-methylphenyl]methyl-4-methylphenyl]acrylate as an antioxidant at least one carbodiimide compound.
    Type: Application
    Filed: August 23, 2010
    Publication date: April 21, 2011
    Applicant: RHEIN CHEMIE RHEINAU GMBH
    Inventors: Christian Scheffner, Bernd Kray, Wilhelm Laufer, Serdar Uestuenbas
  • PREPARATION OF CAST POLYAMIDES USING SPECIAL ACTIVATORS
    Publication number: 20090306332
    Abstract: The present invention relates to a system comprising a) at least one catalyst for the anionic polymerization of lactams, and b) at least one activator for the anionic polymerization of lactams, wherein the at least one activator is a cyclic isocyanate, at least one allophanate or a mixture thereof.
    Type: Application
    Filed: February 17, 2009
    Publication date: December 10, 2009
    Applicant: RHEIN CHEMIE RHEINAU GMBH
    Inventors: Bernd Kray, Andreas Kugler, Willhelm Laufer, Peter Schuster, Volker Wenzel
  • Process for the preparation of pulverulent (poly)ureas by means of spray drying
    Publication number: 20060052261
    Abstract: The present invention relates to a process for the preparation of (poly)urea powders, novel (poly)urea powders, compositions comprising them and the use thereof as thickening agents, in particular in lubricants, such as so-called polyurea greases.
    Type: Application
    Filed: August 5, 2005
    Publication date: March 9, 2006
    Inventors: Bernd Kray, Wilhelm Laufer, Patrick Galda, Achim Fessenbecker
  • Process for the esterification of unsaturated carboxylic acids with unsaturated alcohols with avoidance of blackening and precipitation
    Patent number: 6350899
    Abstract: The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified phosphoric acids. The process according to the invention in particular avoids discoloration (blackening) of the resultant esterification products.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: February 26, 2002
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Rüdiger Herpich, Bernd Kray, Roland Parg, Erich Schmidt, Stefan Schöpfer, Iris Degen
  • Process for the esterification of unsaturated carboxylic acids with unsaturated alcohols with avoidance of blackening and precipitation
    Publication number: 20010018541
    Abstract: The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified phosphoric acids. The process according to the invention in particular avoids discoloration (blackening) of the resultant esterification products.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 30, 2001
    Inventors: Rudiger Herpich, Bernd Kray, Roland Parg, Erich Schmidt, Stefan Schopfer, Iris Degen