Patents by Inventor Albert A. van Gennen

Albert A. van Gennen 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).

  • Process for the preparation of a nylon block copolymer with mixture of high molecular weight activator reactant and low molecular weight activator reactant
    Patent number: 4611052
    Abstract: The invention relates to a process for the preparation of a nylon block copolymer composition by polymerization of lactam in the presence of a lactam-polymerization catalyst and an activator, characterized in that the activator used is a combination of:1. a high molecular weight lactam-terminated activator with a molecular weight of at least 1500, and2. a low molecular weight lactam-terminated activator with a molecular weight of at most 750.The process according to the invention can, in particular, be used in a reaction injection moulding process, in which liquid reaction component are introduced into a mould where fast polymerization to a moulded object takes place.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: September 9, 1986
    Assignee: Stamicarbon B.V.
    Inventors: Cornelis H. Vrinssen, Albert A. van Gennen, Jozef J. M. Bongers