Patents Assigned to Bayer Atkiengesellschaft
  • Patent number: 6566465
    Abstract: Conjugated diolefins, optionally in combination with other unsaturated compounds which may be copolymerized with the diolefins, are polymerized by performing the polymerization of the diolefins in the presence of catalysts based on monocyclopentadienyl compounds of vanadium and alumoxanes in the presence of aromatic vinyl compounds as the solvent at temperatures of −30 C. to +80 C. By means of the process according to the invention, it is possible to straightforwardly produce solutions of polydiolefins, such as polybutadiene, having 1,2 unit contents of 10 to 30% in aromatic vinyl compounds, which solutions may then, for example, be further processed to yield ABS or HIPS.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: May 20, 2003
    Assignee: Bayer Atkiengesellschaft
    Inventors: Heike Windisch, Werner Obrecht, Gisbert Michels, Norbert Steinhauser
  • Patent number: 5922874
    Abstract: N-aryl-N'-alkyl-piperazines are obtained in a particularly simple manner, in good yields and in short reaction times when an aniline is reacted under pressure with an N-alkyl-bishydroxyethyl-amine in the presence of a strong acid.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: July 13, 1999
    Assignee: Bayer Atkiengesellschaft
    Inventors: Joachim Komoschinski, Helmut Fiege, Bernhard Beitzke
  • Patent number: 5552465
    Abstract: Polycarbonate molding compositions resistant to light aging and exhibiting an improved notched impact strength are disclosed. The compositions which are based on an aromatic polycarbonate, aromatic polyester carbonate or a polyester, contain a redox-catalyzed graft polymer of resin-forming monomers on a rubber, a phosphorus compound and a fluorinated polyolefin.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: September 3, 1996
    Assignee: Bayer Atkiengesellschaft
    Inventors: Dieter Witmann, Jochen Schoeps, Bernd Urbanneck, Karl Huff, Karl-Heinz Ott, Horst Peters
  • Patent number: 5288694
    Abstract: The invention relates to new N-aryl-nitrogen heterocycles of the general formula (I) ##STR1## in which R.sup.1 represents hydrogen or halogen,R.sup.2 represents hydrogen or an in each case optionally substituted, straight-chain or branched radical from the series comprising alkyl, alkenyl or cycloalkyl andA represents one of the radicals or ##STR2## where R.sup.3 represents alkyl,R.sup.4 represents alkyl andR.sup.5 represents hydrogen or alkyl,a plurality of processes for their preparation, and their use as herbicides.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: February 22, 1994
    Assignee: Bayer Atkiengesellschaft
    Inventors: Otto Schallner, Klaus Lurssen, Hans-Joachim Santel, Robert R. Schmidt, Renate Vosswinkel
  • Patent number: 4202929
    Abstract: In the production of non-adherent coated paper substrate by applying to the substrate a solvent-containing mixture comprising (A) an .alpha.,.omega.-polyorganosiloxanediol, (B) an organosiloxane containing Si-H groups, (C) an alkyl- or alkenyl-triacetoxysiloxane, (D) an organic isocyanate with more than two isocyanate radicals and (E) a hardening catalyst, and then heating the substrate to harden the coating, the improvement which comprises including in the mixture applied to the substrate a reaction product (F) of a chloromethylpolymethylsiloxane of the formulaClCH.sub.2 (CH.sub.3).sub.2 Si[OSi(CH.sub.3)CH.sub.2 Cl].sub.n OSi(CH.sub.3).sub.2 Clwherein n is from 2 - about 200, with at most an equivalent molar amount of a primary alkyl, alkenyl or cycloalkyl amine with about 4-18 carbon atoms, e.g. butylamine, hexylamine, cyclohexylamine, 2-ethylhexylamine and allylamine. The coating hardens in a very short time in a drying oven but at normal temperatures the mass has a relatively long pot life.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: May 13, 1980
    Assignee: Bayer Atkiengesellschaft
    Inventors: Armand de Montigny, Hans Toepsch, Werner Buchner