Patents Assigned to Holderchem Holding AG
  • Method for after treatment of surfaces of cured and non-cured binder suspensions with colloid solutions
    Patent number: 5925416
    Abstract: Colloids of non-metals or metals, their oxides, hydroxides, oxihydrates and/or polymers (such as, e.g., heteropolyacids) are used in a method for reducing the susceptibility to fissuring in the curing of non-cured binder suspensions (such as, e.g., unset concrete, ready-mix) and for aftertreating already cured binder suspensions (such as, e.g., concrete).
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: July 20, 1999
    Assignee: Holderchem Holding AG
    Inventors: Manfred Akstinat, Willi Suter
  • Copolymers based on maleic acid derivatives and vinyl monomers, their production and application
    Patent number: 5369198
    Abstract: Copolymers which are composed essentially of the structural elements ##STR1## and, if necessary, ##STR2## The copolymers can be employed as dispersing agents for inorganic or organic substances, especially as a plasticiser for hydraulic binders.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: November 29, 1994
    Assignees: Chemie Linz Gesellschaft m.b.H, Holderchem Holding AG
    Inventors: Gerhard Albrecht, Hubert Leitner, Rudolf Lindenberger, Richard Siedl, Christian Werenka, Willi Suter