Patents Assigned to BASF Aktiengesellschaft Ludwigshafen
  • Optical display elements based on aqueous polymer
    Publication number: 20040005453
    Abstract: Optical display elements comprising a layer made from a deformable material (matrix) and from discrete polymer particles whose distribution in the matrix follows a defined spatial lattice structure.
    Type: Application
    Filed: June 17, 2003
    Publication date: January 8, 2004
    Applicant: BASF Aktiengesellschaft, Ludwigshafen, Germany
    Inventors: Reinhold J. Leyrer, Christoph Hamers, Holger Schoepke, Helmut Ritter, Hartmut Loewen
  • Benzothiazole derivatives
    Publication number: 20030153568
    Abstract: The present invention is directed to a compound of formula (I), 1
    Type: Application
    Filed: February 6, 2001
    Publication date: August 14, 2003
    Applicant: BASF Aktiengesellschaft Ludwigshafen, Germany
    Inventors: Kevin P. Cusack, Barbara Scott, Lee D. Arnold, Anna M. Ericsson
  • Method for obtaining hexamethylene diamine from mixtures containing hexamethylene diamine
    Patent number: 6139693
    Abstract: A process for recovering hexamethylenediamine (I) from a mixture (II) including(I) hexamethylenediamine,(III) hexamethyleneimine,(IV) a compound selected from 2-aminomethylcyclopentylamine and 1,2-diaminocyclohexane,(V) an imine,(VI) adiponitrile and 6-aminocapronitrileincludes distilling(a) a mixture (II) to obtain(a1) a low boiling fraction (III),(a2) a medium boiling fraction (VII) (I), (IV) and (V), and(a3) a high boiling fraction (V) and (VI),(b) a mixture (VII) to obtain(b1) an overhead product (IV), and(b2) a mixture (VIII) (I) and (V) as bottom product, and(c) a mixture (VIII) to obtain(c1) (I) as overhead product, and(c2) a bottom product (V).
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: October 31, 2000
    Assignee: BASF Aktiengesellschaft Ludwigshafen
    Inventors: Peter Bassler, Rolf Fischer, Hermann Luyken, Alwin Rehfinger, Guido Voit