The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2012
Filed:
Nov. 02, 2006
James Michael Barnes, Breitscheid-Hochscheid, DE;
Hartmut Nefzger, Pulheim, DE;
Erika Bauer, Juchen, DE;
Stefan Penninger, Pulheim, DE;
Thomas Schultz, Leverkusen, DE;
Heinrich Lutz, Reichshof, DE;
Horst Di Mews, Leverkusen, DE;
Charles S. Gracik, McMechan, WV (US);
James Michael Barnes, Breitscheid-Hochscheid, DE;
Hartmut Nefzger, Pulheim, DE;
Erika Bauer, Juchen, DE;
Stefan Penninger, Pulheim, DE;
Thomas Schultz, Leverkusen, DE;
Heinrich Lutz, Reichshof, DE;
Horst Di Mews, Leverkusen, DE;
Charles S. Gracik, McMechan, WV (US);
Bayer MaterialScience LLC, Pittsburgh, PA (US);
Bayer MaterialScince AG, Leverkusen, DE;
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.