Patents by Inventor Alfred Pischtschan

Alfred Pischtschan 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).

  • Pigment preparations
    Patent number: 4217266
    Abstract: A pigment preparation containing a pigment, a nonionic surface-active agent and, as a thermoplastic finishing agent, a copolymer which has an average molecular weight of 80,000 to 160,000 and consists of 90-50% by weight of .alpha.-methylstyrene and 10-50% by weight of acrylonitrile, and its use for the mass coloring of thermoplastic moulding compositions.
    Type: Grant
    Filed: January 11, 1979
    Date of Patent: August 12, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfred Pischtschan, Karlheinz Wolf, Reinhold Hornle, Fritz Bremer, Bernhard Arnold, Werner Kullick
  • Thermoplastic ABS moulding compositions with improved impact strength
    Patent number: 4174325
    Abstract: ABS moulding compositions containing 0.1 to 10% by weight of at least one ester of an aliphatic saturated C.sub.10 to C.sub.22 -monocarboxylic acid and an aliphatic or aromatic hydroxy compound having 1 to 6 hydroxyl groups as a processing auxiliary.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: November 13, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfred Pischtschan, Siegfried Adelmann, Dieter Margotte
  • Thermoplastic molding compositions
    Patent number: 4167543
    Abstract: A thermoplastic moulding composition comprising a polymer mixture of (A) 25 to 95% by weight of a graft polymer of 70 to 30% by weight of a mixture of styrene (95 to 50% by weight) and acrylonitrile (5 to 50% by weight) on 30 to 70% by weight of polybutadiene or a butadiene-styrene copolymer, and (B) 5 to 75% by weight of a terpolymer containing 10 to 30 parts by weight of acrylonitrile, 7.5 to 15 parts by weight of maleic acid anhydride, and 82.5 to 55 parts by weight of styrene in copolymerized form.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: September 11, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lothar Liebig, Frank Wingler, Karl-Heinz Ott, Gert Humme, Alfred Pischtschan
  • Thermoplastic molding compositions
    Patent number: 4163032
    Abstract: A thermoplastic molding composition having improved flow, toughness. and heat distortion comprising a polymer mixture of (A) 25 to 95% by weight of a graft polymer of 70 to 30% by weight of a mixture of styrene (95 to 50% by weight) and acrylonitrile (5 to 50% by weight) on 30 to 70% by weight of an EPDM-rubber, and (B) 50 to 75% by weight of a terpolymer of acrylonitrile, maleic acid anhydride and styrene, the terpolymer containing 10 to 30 parts by weight of acrylonitrile, 7.5 to 15 parts by weight of maleic acid anhydride, and 82.5 to 55 parts by weight of styrene in copolymerised form.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: July 31, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lothar Liebig, Frank Wingler, Karl-Heinz Ott, Gert Humme, Alfred Pischtschan
  • Piperidine derivatives as light stabilizers
    Patent number: 4140673
    Abstract: Piperidine derivatives of formula ##STR1## can be prepared by reacting 4-amino-piperidine with for example enolic ethers. The compounds obtained may be used as stabilizers.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: February 20, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Burkhard Lachmann, Hans J. Rosenkranz, Harald Oertel, Alfred Pischtschan, Aziz El-Sayed