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:
Sep. 29, 2015
Filed:
Sep. 14, 2012
Stéphane Costeux, Midland, MI (US);
Dennis R. Lantz, Midland, MI (US);
Daniel A. Beaudoin, Midland, MI (US);
Mark A. Barger, Midland, MI (US);
Stéphane Costeux, Midland, MI (US);
Dennis R. Lantz, Midland, MI (US);
Daniel A. Beaudoin, Midland, MI (US);
Mark A. Barger, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Prepare a polymeric nanofoam using a continuous extrusion process by providing a polymer melt of a polymer composition in an extruder, introducing carbon dioxide to a concentration above the solubility in the polymer melt, cooling the polymer melt without increasing the pressure to achieve conditions where all of the carbon dioxide is soluble in the polymer composition and then extruding the polymer composition and carbon dioxide mixture through an extrusion die so as to experience a pressure drop of at least five MegaPascals at a rate of at least ten MegaPascals per second and allowing the polymer composition to expand into a polymeric nanofoam.