Patents Assigned to Bayer MaterialScince AG
  • Process for the production of stable polymers
    Patent number: 8110704
    Abstract: Stable NCO prepolymers are produced from polyisocyanates having a melting point greater than 70° C., preferably, naphthalene diisocyanate, having advantageous physical properties. An important feature of the process of the present invention is the rapid cooling of the prepolymer. The process of the present invention may be carried out on a continuous or batch basis. The prepolymers of the present invention are particularly suitable for the production of cast polyurethane elastomers.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: February 7, 2012
    Assignees: Bayer MaterialScience LLC, Bayer MaterialScince AG
    Inventors: James Michael Barnes, Hartmut Nefzger, Erika Bauer, Stefan Penninger, Thomas Schultz, Heinrich Lutz, Horst Di Mews, Charles S. Gracik