Patents by Inventor Rainer Elm

Rainer Elm 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).

  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Patent number: 7339074
    Abstract: The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: March 4, 2008
    Assignee: Degussa AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Patent number: 7329776
    Abstract: A multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: February 12, 2008
    Assignee: Degussa AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Patent number: 7307186
    Abstract: A process for continuous phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: December 11, 2007
    Assignee: Degussa AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Publication number: 20050043562
    Abstract: A multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Application
    Filed: August 20, 2004
    Publication date: February 24, 2005
    Applicant: DEGUSSA AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Publication number: 20050043563
    Abstract: The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 24, 2005
    Applicant: Degussa AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Multistage continuous preparation of cycloaliphatic diisocyanates
    Publication number: 20050043561
    Abstract: A process for continuous phosgene-free preparation of cycloaliphatic diisocyanates.
    Type: Application
    Filed: August 13, 2004
    Publication date: February 24, 2005
    Applicant: DEGUSSA AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm, Hans-Werner Michalczak
  • Process for preparing low-odor and storage-stable monomer-containing polyisocyanurates based on isophorone diisocyanate
    Publication number: 20040176562
    Abstract: Process for preparing low-odor and storage-stable monomer-containing polyisocyanurates from isophorone diisocyanate, in which the partial trimerization is carried out over a period of from 2 minutes to 30 minutes in the presence of from 0.05 to 1.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 9, 2004
    Applicant: DEGUSSA AG
    Inventors: Stephan Kohlstruk, Manfred Kreczinski, Rainer Elm
  • Aqueous binders based on polybutadiene
    Patent number: 6353060
    Abstract: A water-soluble or water-dispersible binder based on polybutadienes which is modified with at least 5% by weight of maleic anhydride and wherein at least 30% of the anhydride groups are present as imide groups from reaction with an amino carboxylic acid.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: March 5, 2002
    Assignee: Degussa AG
    Inventors: Wilfried Paulen, Rainer Elm, Werner Freitag, Martina Ortelt, Wolfgang Sasse, Karin Sokolowski
  • Aqueous binders based on polybutadiene
    Patent number: 6218477
    Abstract: A water-soluble or water-dispersible binder based on polybutadienes which is modified with at least 5% by weight of maleic anhydride and wherein at least 30% of the anhydride groups are present as imide groups from reaction with an amino carboxylic acid.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: April 17, 2001
    Assignee: Huels Aktiengesellschaft
    Inventors: Wilfried Paulen, Rainer Elm, Werner Freitag, Martina Ortelt, Wolfgang Sasse, Karin Sokolowski
  • Process for the continuous preparation of hydroxyalkylamides
    Patent number: 6194613
    Abstract: Process for the continuous preparation of hydroxyalkylamides Process for the continuous preparation of hydroxyalkylamides from carboxylic esters and alkanolamines, wherein the reaction of the starting materials is carried out in an extruder or intensive mixer by intensive mixing and brief reaction with supply of heat and simultaneous removal of the alcohol formed and the final product is then isolated.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: February 27, 2001
    Assignee: Creanova Spezialchemie GmbH
    Inventors: Thomas Weihrauch, Klaus Behrendt, Silvia Herda, Rainer Elm
  • Protective material capable of application in molten form
    Patent number: 5412029
    Abstract: A protective material, based on poly-.alpha.-olefins, capable of easy application in molten form, is distinguished by a balanced pattern of properties, good adhesion and good recycling capability. The present protective materials contain (I) not less than 50% by weight of one or more largely amorphous poly-.alpha.-olefins, composed of (a) 3 to 75% by weight of one or more .alpha.-olefins containing 4 to 10 carbon atoms, (b) 25 to 95% by weight of propene, and (c) 0 to 20% by weight of ethene; (II) not more than 30% by weight of other olefin homo- and copolymers which may be either largely amorphous or preferably partially crystalline; and (III) not more than 40% by weight of additives which are standard in the plastic sector. Such protective materials can be used in particular in the underfloor region of motor vehicles.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: May 2, 1995
    Assignee: Huels Aktiengesellschaft
    Inventors: Rainer Elm, Helmut Kehr, Adolf Kuhnle, Matthias Schleinzer
  • Supported silver catalysts mixed with promoter metal compounds for the production of ethylene oxide
    Patent number: 4409394
    Abstract: The activity and the service life of supported silver catalysts used in the preparation of ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen are extended by using mixtures of:(a) supported silver catalysts and promoter metal compounds;(b) supported silver catalysts and supported promoter metal compounds;(c) promoter metal compound treated supported silver catalysts and promoter metal compounds; or(d) promoter metal compound treated supported silver catalysts and supported promoter metal compounds.Promoter metal compounds containing about 0.001-0.05% by weight rubidium, about 0.01-0.20% by weight potassium, about 0.001-0.5% by weight cesium or about 0.01-0.25% by weight barium, based on the total weight of catalyst, are suitable.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: October 11, 1983
    Assignee: Chemische Werke Huls AG
    Inventors: Erwin Vangermain, Claus-Dieter Mengler, Rainer Elm, Horst Ueberschaer, Wilhelm Brauckmann
  • Supported silver catalysts mixed with promoter metal compounds for the production of ethylene oxide
    Patent number: 4310442
    Abstract: The activity and the service life of supported silver catalysts used in the preparation of ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen are extended by using mixtures of:(a) supported silver catalysts and promoter metal compounds;(b) supported silver catalysts and supported promoter metal compounds;(c) promoter metal compound treated supported silver catalysts and promoter metal compounds; or(d) promoter metal compound treated supported silver catalysts and supported promoter metal compounds.Promoter metal compounds containing about 0.001-0.05% by weight rubidium, about 0.01-0.20% by weight potassium, about 0.001-0.5% by weight cesium or about 0.01-0.25% by weight barium, based on the total weight of catalyst, are suitable.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: January 12, 1982
    Assignee: Chemische Werke Huls AG
    Inventors: Erwin Vangermain, Claus-Dieter Mengler, Rainer Elm, Horst Ueberschaer, Wilhelm Brauckmann