Patents Assigned to TROVOTECH GMBH
  • Patent number: 11220453
    Abstract: A color-stable, antimicrobial glass powder obtained by partial ion exchange at a temperature of 300° C. to 350° C. and an exchange time of 1 to 120 minutes, is formed of a mixture of porous glass particles having micropores and macropores made of borosilicate glass continuously foamed by extrusion having a Fe2O3 content <0.2 wt %, in which the obtained glass foam is subsequently comminuted by dry grinding to average particle sizes of 1.0 to 8.0 ?m. The mixture includes color stabilizers containing 0.1% to 0.2% of ammonium ions and antimicrobial metal ions from dissolved metal salts, wherein the metal ions may be silver and/or zinc and/or copper ions. A method for the production of a color-stable, antimicrobial glass powder and applications for using the color-stable, antimicrobial glass powder are also provided.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: January 11, 2022
    Assignee: TROVOTECH GmbH
    Inventors: Uwe Ferner, Hans-Juergen Voss, Hans-Udo Lugner
  • Patent number: 9487645
    Abstract: A flame retardant composition for thermoplastic molding materials, and also moldings, fibers or films that can be prepared from the flame retardant molding materials. The composition includes 30 to 70% by weight of melamine cyanurate and of 30 to 70% by weight of porous amorphous glass particles. The composition is prepared from foam glass produced continuously in a high-temperature extruder. The sum of the components is 100% by weight.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 8, 2016
    Assignee: Trovotech GmbH
    Inventors: Hans-Juergen Voss, Uwe Ferner
  • Publication number: 20100196487
    Abstract: A composition with antimicrobial efficacy has at least one or more polymers; or polymerizable or crosslinkable monomers; or polymerizable or crosslinkable prepolymers; or polymerizable or crosslinkable polymers; and porous glass particles which contain an antimicrobial silver additive.
    Type: Application
    Filed: August 25, 2008
    Publication date: August 5, 2010
    Applicant: TROVOTECH GMBH
    Inventors: Hans-Jurgen Voss, Uwe Ferner, Günther Rossa
  • Publication number: 20100071415
    Abstract: A method of producing antimicrobial or antibacterial glass particles, wherein known starting materials are fused, broken or powdered, fed to an extruder, fused therein with addition of defined dose of foaming agents, the foaming agents being introduced into the molten glass by the building pressure, the molten glass being then foamed to give a closed-pore foam on a subsequent pressure reduction to increase surface area and the foam subsequently subjected to a comminution process. The glass particles generated in the comminution process become antimicrobial or antibacterial during an ion exchange or the antimicrobial or antibacterial properties thereof are increased as a result of the ion exchange.
    Type: Application
    Filed: May 30, 2007
    Publication date: March 25, 2010
    Applicant: TROVOTECH GMBH
    Inventors: Hans-Juergen Voss, Harald Selig