Patents by Inventor Herbert Fleischer

Herbert Fleischer 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).

  • Process for dyeing textile materials of polyacrylonitrile: quaternized piperazine copolymer as basic dye retarder
    Patent number: 4488879
    Abstract: This invention relates to dyeing textile materials of polyacrylonitrile or copolymers containing acrylonitrile in polymerized form with basic dyestuffs in aqueous dyeing liquors using the exhaust method employing retarders. The retarders are obtained by condensing (a) piperazine and piperazine derivatives with (b) ethylene chloride, epihalohydrin, propylene chloride, 1,3-dichloro-2-hydroxypropane, bis-epoxybutane, 1,4-dichlorobutene or their mixtures in mole ratios of 1:0.9 to 1:1.1. The condensation products are then quaternized with benzyl chloride using 0.8 to 1.5 moles of benzyl chloride per mole of component (a) for the quaternization. The aqueous solutions of the retarders either do not foam or show a very low foaming tendency.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: December 18, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Fikentscher, Herbert Fleischer, Sigismund Heimann, Heinrich Mertens
  • Quaternary ammonium salts
    Patent number: 3963714
    Abstract: Special quaternary ammonium salts of 2,4,6-tris-(.omega.-dialkylamino-alkyleneamino)-triazines and 2,4,6-tris-(.omega.-dialkylaminoalkoxy)-triazines and their use in dyeing anionic polyacrylonitrile fibers with basic dyes; these special derivatives of triazine are particularly effective retarders.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: June 15, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Jozsef Gerendas, Herbert Fleischer, Rolf Fikentscher, Herbert Helfert