Patents Assigned to Eckart GmbH
  • Publication number: 20020134282
    Abstract: The present invention deals with metal oxide coated, flake shaped soft iron pigments. The characteristic feature is a reflector substrate, which is produced by deformation of reduced carbonyl iron powder. The pigments are colorful, display metallic luster and a high magnetic permeability. They can be oriented in the medium by means of an external magnetic field. The novel pigments find use in the decorative and/or functional field, particularly in lacquers, paints, plastics, in printing, in glass, ceramics and in cosmetics.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 26, 2002
    Applicant: Eckart GmbH & Co. KG
    Inventors: Werner Ostertag, Stefan Trummer, Frank Henglein, Klaus Greiwe
  • Patent number: 6287695
    Abstract: In aluminum-based metal pigments produced by physical vapor deposition of a metal film and subsequent crushing of the metal film metal surfaces which are exposed after the operation of crushing the metal film and in particular fracture surfaces thereof are covered with a passivating protective layer to afford corrosion stability of those metal pigments.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: September 11, 2001
    Assignee: Eckart-Werke Standard Bronzepulver-Werke Carl Eckart GmbH & Co.
    Inventors: Günter Kaupp, Werner Ostertag, Günter Sommer
  • Patent number: 5993526
    Abstract: A pearl shine pigment preparation as a pre-product for a printing ink in ch pearl shine pigment is made into a paste with a binding agent and optionally with a solvent and/or additives and the paste is put into a compact particle form. For that purpose the paste is compressed to form compact particles by tabletting, briquetting, pelleting or extruding. In that compacted form the pearl shine pigment preparation can be used for the production of printing inks, in particular intaglio printing inks.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: November 30, 1999
    Assignee: Eckart-Werke Standard Bronzepulver-Werke Carl Eckart GmbH & Co.
    Inventors: Gunter Sommer, Gunter Kaupp
  • Patent number: 5964936
    Abstract: The invention concerns oxidised aluminium or aluminium alloy pigments having a content of metallic aluminium of not more than 90% by weight with respect to the total weight, wherein the pigments are colored, flake-like, shiny and non-agglomerated, a process for the production thereof and use thereof as special-effect pigments and as base pigments for further colouring with organic or inorganic color pigments.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: October 12, 1999
    Assignee: Eckart-Werke Standard Bronzepulver-Werke Carl Eckart GmbH & Co.
    Inventor: Wolfgang Reisser
  • Patent number: 5332767
    Abstract: A synthetic resin-coated metal pigment such as aluminum pigment has a silne coating covalently bonded to the surface of the pigment particles, and a three-dimensionally cross-linked synthetic resin coating covalently bonded to the siloxane coating. Production of the coated pigment comprises production of a silicon-organic coating on the pigment surface and then conversion of that coating into a siloxane coating by hydrolysis and condensation, followed by reaction with a low-molecular compound for forming the cross-linked synthetic resin coating. A range of uses of the coated pigment is also set forth.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: July 26, 1994
    Assignee: Eckart-Werke Standard Bronzpulver-Werke Carl Eckart GmbH & Co.
    Inventors: Wolfgang Reisser, Guenter Sommer