Patents by Inventor Max Spapens

Max Spapens 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).

  • Publication number: 20240352189
    Abstract: A multi-stage process for continuous production of a polysiloxane-polycarbonate block copolymer by polycondensation is disclosed where in a first stage an oligocarbonate and a hydroxyaryl-terminated polysiloxane are provided and in a second stage at least one special condensation reactor is used. A certain amount of a particular co-catalyst is added and this co-catalyst is added upstream of the first special condensation reactor. The polysiloxane-polycarbonate block copolymer produced by the process according to the invention has a high proportion of small polysiloxane domains and features good mechanical properties, in particular tough fracture behaviour in the notched impact test according to ISO 7391/ISO 180A, good processability, for example in injection moulding or in extrusion, and good flowability.
    Type: Application
    Filed: July 19, 2022
    Publication date: October 24, 2024
    Inventors: Ulrich Liesenfelder, Johan Vanden Eynde, Marc Buts, Alexander Meyer, Paul Van Dorst, Max Spapens, Marcus De Wolf, Roland Engberg, Gregor Karrenberg
  • Publication number: 20240352188
    Abstract: A continuous process for producing a polysiloxane-polycarbonate block copolymer by polycondensation, comprising use of at least one thin-film evaporator, where this at least one thin-film evaporator includes at the circumference at least two wiper blade elements which rotate in the at least one thin-film evaporator. An oligocarbonate is reacted with a hydroxyaryl-terminated polysiloxane to afford a polysiloxane-polycarbonate block copolymer. In the reaction of the oligocarbonate with the hydroxyaryl-terminated polysiloxane using at least one thin-film evaporator, certain process parameters are observed. The polysiloxane-polycarbonate block copolymer produced has a small volume fraction of large polysiloxane domains at simultaneously narrow size distribution of the polysiloxane domains and exhibits good mechanical properties, in particular tough fracture behaviour, good processability, and good flowability.
    Type: Application
    Filed: July 19, 2022
    Publication date: October 24, 2024
    Inventors: Ulrich Liesenfelder, Johan Vanden Eynde, Marc Buts, Alexander Meyer, Paul Van Dorst, Max Spapens, Marcus De Wolf, Roland Engberg, Gregor Karrenberg