Patents Assigned to DSM
  • Publication number: 20070164474
    Abstract: The invention relates to a process for the manufacture of a ballistic-resistant molded article in which a stack of monolayers is formed, each monolayer containing unidirectionally oriented reinforcing fibers and at most 30 mass % of a plastic matrix material, the reinforcing fibers being highly-drawn polyethylene fibers, and with the fiber direction in each monolayer being rotated with respect to the fiber direction in an adjacent monolayer, the stack then being compressed at a pressure of more than 25 MPa and a temperature between 125 and 150° C., and the plastic matrix material having a 100% modulus of at least 3 MPa.
    Type: Application
    Filed: March 7, 2007
    Publication date: July 19, 2007
    Applicant: DSM
    Inventors: Martinus Johannes Jacobs, Jean Hubert Beugels, Marc Blaauw
  • Patent number: 6274773
    Abstract: Process for the continuous preparation of an alkyl 5-formylvalerate by reacting an alkyl-3-pentenoate with carbon monoxide and hydrogen by hydroformylation using a catalyst system comprising rhodium or iridium and a multidentate organic phosphite ligand according to the general formula: in which n is 2-6, X is an n-valent organic bridging group, and in which the end groups R1-R2 are monovalent aryl groups, wherein the process is carried out in the presence of an acid compound having a pKa between 1 and 12 measured in water at 18° C.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: August 14, 2001
    Assignees: DSM, E.I. DuPont De Nemours & Co.
    Inventors: Onko J. Gelling, Peter C. Borman
  • Patent number: 5496870
    Abstract: A curable liquid resin composition comprising a urethane (meth)acrylate polymer obtained by reacting:(A) a polyol compound containing as structural units groups which are represented by formulae--CH.sub.2 CH.sub.2 O-- or--CH.sub.2 CH(CH.sub.2 CH.sub.3)O--;(B) a polyisocyanate compound; and(C) at least one (meth)acrylate compound containing a hydroxyl group and coated articles produced therefrom.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: March 5, 1996
    Assignee: DSM
    Inventors: Chander P. Chawla, Tohru Ohtaka, Shinichirou Iwanaga, Tsuyoshi Watanabe, Katsutoshi Igarashi