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:
Dec. 13, 2016
Filed:
Nov. 22, 2011
Applicants:
Shari L. Kram, Midland, MI (US);
Simon Lee, Midland, MI (US);
William G. Stobby, Midland, MI (US);
Ted A. Morgan, Midland, MI (US);
Inventors:
Shari L. Kram, Midland, MI (US);
Simon Lee, Midland, MI (US);
William G. Stobby, Midland, MI (US);
Ted A. Morgan, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 44/34 (2006.01); C08J 9/12 (2006.01);
U.S. Cl.
CPC ...
B29C 44/3403 (2013.01); C08J 9/127 (2013.01); C08J 2203/06 (2013.01); C08J 2203/10 (2013.01); C08J 2203/12 (2013.01); C08J 2203/202 (2013.01); C08J 2325/04 (2013.01); C08J 2425/18 (2013.01);
Abstract
Extruded polystyrene foams are made with an added brominated styrene-butadiene polymer as a flame retardant. The blowing agent is a mixture of carbon dioxide, ethanol and water, which may also contain a C-Chydrocarbon. The blowing agent mixture overcomes a tendency of the brominated styrene-butadiene to form very small cells. This allows the foam to expand fully to form good quality, low density extruded foam.