Patents by Inventor Cornelis H. Vrinssen

Cornelis H. Vrinssen 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
  • N-Substituted carbamoyl-lactam compound
    Patent number: 4540515
    Abstract: The invention concerns an N-substituted carbamoyl-lactam compound characterized by the formula: ##STR1## where in the formula: R is a polyol radical from a polyol having the formula R--(OH).sub.xi, where .sub.xi is an integer.gtoreq.2R' is an alkyl, whether or not cyclic aralkyl, alkaryl or aryl group, .sub.yi is an integer>0,(--L) is an unopened lactam ring and(--L--) is an opened lactam block. The compoundsare highly suited for use as activators in preparing nylon block copolymers.
    Type: Grant
    Filed: August 17, 1984
    Date of Patent: September 10, 1985
    Assignee: Stamicarbon B.V., Licensing Subsidiary of DSM
    Inventors: Albert A. van Geenen, Joseph J. M. Bongers, Jozef L. M. van der Loos, Cornelis H. Vrinssen