Patents by Inventor Walter Sprenger

Walter Sprenger 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).

  • Patent number: 5066758
    Abstract: Carrier resin for pigment pastes, and its preparation and useThe invention relates to paste resins based on epoxide compounds, containing (a) specific quaternary ammonium groups, (b) OH groups and (c) isocyanate radicals which are bonded to the epoxy compound and of which at least 10 mol % are derived from a long-chain, monofunctional isocyanate having at least 8 carbon atoms, the average molecular weight (Mn) of these paste resins being 500 to 10,000. The invention furthermore relates to the preparation of these paste resins, to their use for pigment pastes and to these pigment pastes. Water-dilutable paints, in particular electrocoating paints which contain the pigment pastes according to the invention, give trouble-free surfaces and comparable film thicknesses, even on different substrates.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: November 19, 1991
    Assignee: Hoechst AG
    Inventors: Michael Honel, Peter Ziegler, Walter Sprenger, Wolfgang Wendt
  • Patent number: 5055542
    Abstract: Carrier resin for pigment pastes, preparation and use thereof The invention relates to paste resins comprising (a) quaternary ammonium groups, (b) hydroxyl groups, (c) urethane radicals and (d) groups of the formula (I) ##STR1## in which R.sup.1 to R.sup.4 independently of one another represent hydrogen or a hydrocarbon radical of 1 to 10 carbon atoms and X denotes hydroxyl or a urethane radical, the average molecular weight (Mn) of these paste resins being 500 to 10,000.The invention further relates to the preparation of these paste resins, their use for pigment pastes as well as these pigment pastes. Water-thinnable paints, especially electrocoating paints which comprise the pigment pastes according to the invention, furnish, from a variety of substrates, surfaces free from defects and comparable film thicknesses.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: October 8, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Michael Honel, Peter Ziegler, Walter Sprenger, Wolfgang Wendt
  • Patent number: 4808658
    Abstract: The invention relates to aminourethanes essentially composed of structural units derived from (.alpha.) polyamines of the general formula (I) ##STR1## and of structural units derived from (.beta.) oligomeric or polymeric compounds which contain at least one terminal 2-oxo-1,3-dioxolane group.The invention further relates to a process for preparing these aminourethanes and to their use in particular in paint formulations.The aminourethanes according to the invention are suitable in particular for use as curable water-dispersible binders in particular for cationic electrocoating.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: February 28, 1989
    Assignee: Hoechst AG
    Inventors: Gerd Walz, Michael Honel, Gerhard Brincopke, Walter Sprenger, Manfred Finke, Rudiger Lenz
  • Patent number: 4530865
    Abstract: A cable protecting device includes a closable, longitudinal, hollow body of plastic, rubber or the like, in particular for the supplementary laying of cables along walls, floors or furniture.In order to create a cable protecting device which can be inexpensively manufactured as an endless profile, is visually unobtrusive when installed, is easily laid, and finally enables easy placement of the individual cables into it, the cable protecting device has two legs (1", 2") joined with one another longitudinally, which are disposed at right angles to one another or can be brought into a position at right angles to one another, and at least one covering (3", 4") closing off the hollow space defined by the legs (1", 2") in their position at right angles to one another is joined with one leg (1", 2") in such a manner that this covering can be folded back elastically.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: July 23, 1985
    Inventor: Walter Sprenger
  • Patent number: 4465798
    Abstract: A water-dilutable epoxide which is free from glycidyl ester and glycidyl ether groups, characterized in that it contains, in addition to at least one epoxide group, at least one ester group of a monocarboxylic acid and a further ester group which is vicinally arranged thereto, this further ester group having been obtained by reaction of an OH group with a polycarboxylic monoanhydride, wherein the second COOH group formed from the anhydride by the esterification occurs wholly or partially in the form of a salt with a base; processes for preparing it and the use thereof in aqueous media or media compatible with water.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: August 14, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerd Walz, Thaddaus Wirth, Walter Sprenger
  • Patent number: 4390688
    Abstract: A water dilutable polyester having a good resistance to hydrolysis based on(A) at least one dicarboxylic acid unit,(B) at least one polycarboxylic monoanhydride and(C) at least one alcohol component containing at least dihydric alcohol,the COOH groups of the polyester being at least partially present in the form of salts with amine, characterized in that the polyester is also derived from(D) at least one epoxy compound which contains at least two oxiran rings and is selected from the group consisting of epoxidized fatty acids, derivatives thereof and epoxidized aliphatic hydrocarbons or mixtures thereof with up to 30% of monoepoxides, the percentage being based on the epoxy groups, and in that the polycarboxylic monoanhydride (B) is incorporated in the form of a half ester and is other than phthalic anhydride and maleic anhydride.The invention also relates to a process for the preparation of such polyester, its use in a coating composition and to articles coated with such coating compositions.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: June 28, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerd Walz, Thaddaus Wirth, Walter Sprenger