Patents by Inventor Winfried Wehner

Winfried Wehner 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 preparation of highly concentrated free-flowing aqueous solutions of betaines
    Patent number: 5962708
    Abstract: The invention relates to a process for the preparation of highly concentrated free-flowing and pumpable aqueous solutions of betaines by quaternization of a compound which contains tertiary amine nitrogen with a .omega.-halo carboxylic acid characterized in that 0.5-5% by weight of the final product, of a viscosity-reducing compound such as an alkali or alkaline earth metal citric acid salt is added to the reaction mixture before or during the quaternization reaction.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: October 5, 1999
    Assignee: Witco Surfactants GmbH
    Inventors: Ingo Hamann, Hans-Jurgen Kohle, Winfried Wehner
  • Process for preparing highly concentrated, free-flowing aqueous solutions of betaines
    Patent number: 5681972
    Abstract: The invention relates to a process for preparing highly concentrated, free-flowing and pumpable, aqueous solutions of betaines by quaternization of compounds containing tertiary amine nitrogen with omega-halocarboxylic acids by known processes, which is characterized in that a) 30-100 equivalent-%, based on the amount of omega-halocarboxylic acid used, of Mg(OH).sub.2 and/or Ca(OH).sub.2 and b) 0-70 equivalent-%, based on the amount of omega-halocarboxylic acid used, of one or more NaOH, KOH and NH.sub.4 OH are added to the reaction mixture before or during the quaternization reaction.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: October 28, 1997
    Assignee: Witco Surfactants GmbH
    Inventors: Ingo Hamann, Hans-Jurgen Kohle, Winfried Wehner
  • Process for the preparation of highly concentrated free-flowing aqueous solutions of betaines
    Patent number: 5464565
    Abstract: The invention relates to a process for the preparation of highly concentrated free-flowing aqueous solutions of betaines, which is characterized in that at least one of the compounds of the general formula (I) ##STR1## is added to the reaction mixture before or during the quaternization reaction; wherein R, R.sup.1, R.sup.2, are each C.sub.1 -C.sub.10 alkyl, optionally substituted with hydroxyl, and n is 1-3.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: November 7, 1995
    Assignee: Witco Surfactants GmbH
    Inventors: Ingo Hamann, Hans-Jurgen Kohle, Winfried Wehner
  • Fabric softener rinsing agents
    Patent number: 5364542
    Abstract: The present invention relates to a soft-rinsing agent comprising a mixture of two soft-rinsing components, each of which is a quaternary salt as described herein. The mixture may contain 10-90% of the first component and 90-10% by the second component.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: November 15, 1994
    Assignee: Rewo Chemische Werke GmbH
    Inventors: Horst Birkhan, Hans-Juergen Kohle, Joachim Welgand, Winfried Wehner
  • Ammonium compounds, preparation thereof and use thereof as cleaning agent, cosmetic raw material and softener, in particular as final-rinse fabric softner
    Patent number: 5254271
    Abstract: Ammonium compounds and the use thereof as fabric softener comprising mixtures of quaternary ammonium compounds with or without ester groups prepared by reacting amines with dimerized fatty acids and subsequent quaternization or protonation with inorganic or organic acids.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: October 19, 1993
    Assignee: Rewo Chemische Werke GmbH
    Inventors: Ingo Hamann, Elke Hohn, Hans-Jurgen Kohle, Winfried Wehner, Joachim Weigand
  • Fabric softener rinsing agents
    Patent number: 5180508
    Abstract: The present invention relates to a soft-rinsing agent comprising a mixture of two soft-rinsing components, each of which is a quaternary salt as described herein. The mixture may contain 10-90% of the first component and 90-10% by the second component.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: January 19, 1993
    Assignee: REWO Chemische Werke GmbH
    Inventors: Horst Birkhan, Hans-Juergen Kohle, Joachim Weigand, Winfried Wehner