Patents by Inventor Imbridt Murrar

Imbridt Murrar 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).

  • Patent number: 8592497
    Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: November 26, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Juergen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg
  • Publication number: 20100076101
    Abstract: The invention relates to polyphenylenepolymethylene polyisocyanates (B) comprising (B1) the 2-ring product of polyphenylenepolymethylene polyisocyanate (B2) the 3-ring product of polyphenylenepolymethylene polyisocyanate (B3) the 4-ring product of polyphenylenepolymethylene polyisocyanate (B4) the 5-ring product of polyphenylenepolymethylene polyisocyanate, wherein the constituents (B2), (B3) and (B4) are, at a content of (B1) of up to 55% by weight, based on the weight of (B), present in a weight ratio of (B2):(B3):(B4) of 8±4:3.5±1.8:1.2±0.9 and the component (B) comprises at least 85% by weight, based on the weight of the component (B), of the constituents (B1), (B2), (B3) and (B4).
    Type: Application
    Filed: November 12, 2007
    Publication date: March 25, 2010
    Applicant: BASF SE
    Inventors: Hans-Juergen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg, Baerbel Guschel
  • Publication number: 20090253819
    Abstract: The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).
    Type: Application
    Filed: April 3, 2007
    Publication date: October 8, 2009
    Applicant: BASF SE
    Inventors: Hans-Jürgen Reese, Imbridt Murrar, Ralf Fritz, Andres Cabrera, Birgit Magg
  • Publication number: 20070060731
    Abstract: The invention relates to a process for preparing prepolymers containing isocyanate groups by reacting a) diisocyanates with b) compounds having at least two hydrogen atoms which are reactive toward isocyanate groups in the presence of c) catalysts, and subsequently separating off the excess monomeric diisocyanates, wherein the diisocyanates a) used are unsymmetrical diisocyanates and the catalysts c) used are organometallic catalysts and these organometallic catalysts are removed, blocked or deactivated before the monomeric diisocyanates are separated off.
    Type: Application
    Filed: October 30, 2004
    Publication date: March 15, 2007
    Applicant: BASF Aktiengesellschaft
    Inventors: Michael Wind, Martin Kreyenschmidt, Imbridt Murrar, Hans-Jurgen Reese, Heiko Urtel, Hauke Malz
  • Patent number: 7179935
    Abstract: A process for the preparation of isocyanates from carbamic esters.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: February 20, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Stroefer, Michael Ochse, Volker Krase, Andreas Schmidt, Matthias Kloetzer, Imbridt Murrar, Gisbert Franzke
  • Publication number: 20050154227
    Abstract: In a process for the preparation of isocyanates from carbamic esters, (i) a mixture containing a monofunctional or polyfunctional carbamic ester is passed continuously into a cleavage reactor or a cascade of two or more cleavage reactors, (ii) the carbamic ester is subjected to a thermal cleavage to give isocyanate and alcohol, (iii) the cleavage gas escaping from the cleavage reactor or reactors and containing the isocyanate, the alcohol, any uncleaved and/or partly cleaved carbamic ester and byproducts is brought into contact with a liquid coolant and condensing agent, cooled and at least partly condensed and (iv) the isocyanate and the alcohol are obtained from the cooled cleavage gas and the condensate in a rectification column, a part-stream of the alcohol obtained being used as liquid coolant and condensing agent for cooling and condensing the cleavage gas.
    Type: Application
    Filed: February 28, 2003
    Publication date: July 14, 2005
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Eckhard Stroefer, mIchael Ochse, Volker Krase, Andreas Schmidt, Matthias Klotzer, Imbridt Murrar, Gisbert Franzke
  • Publication number: 20020133042
    Abstract: Highly functional aromatic polyisocyanates are prepared by reacting aromatic polyisocyanates, if required as a mixture with further mono- and/or polyisocyanates, with addition of catalytic acidic substances and water, by a process wherein the aromatic polyisocyanates used comprise at least one tolylene diisocyanate and the catalytic acidic substance used is at least one alkyl and/or aralkyl phosphate, and the process is carried out in such a way that the water is added with a temperature/time gradient increase from 5 to 60°/hour and until an isocyanate modification of the starting NCO terminal groups from 1 to 80% is established.
    Type: Application
    Filed: December 17, 2001
    Publication date: September 19, 2002
    Inventors: Imbridt Murrar, Heinz Plaumann, Jurgen Winkler, Marita Schuster