Patents by Inventor Gerhart Schultz

Gerhart Schultz 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).

  • Aqueous dispersion of sulfo-containing polymers for cement additive applications
    Patent number: 4558092
    Abstract: An aqueous plastics dispersion is manufactured by copolymerization of several olefinically unsaturated monomers, one of them at least being free from amide and sulfo groups, one of them at least having an amide group and one of them at least having a sulfo group. Copolymerization is carried out in an aqueous medium under usual conditions. The resulting copolymer has a second order transition temperature of 20.degree. C. at most. The plastics dispersion is compatible with cement and serves as additive in cement-containing building materials.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: December 10, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rolf Reinecke, Helmut Rinno, Gerhart Schultz
  • Additive for mortar and concrete
    Patent number: 4009135
    Abstract: The properties of mortar and concrete are improved by the addition to the fresh mortar or concrete of an aqueous dispersion of a plastic obtained by the emulsion polymerization of olefinically unsaturated monomers, and of a polycondensate of formaldehyde and an amino-s-triazine modified with sulfite or sulfonic acid. A well-balanced relation between the compressive strength, the tensile strength in bending, and the adhesion to aged and hardened mortar or concrete is thus obtained.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: February 22, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Albrecht Harreus, Eberhard Muller, Gerhart Schultz