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. 21, 2012
Filed:
Oct. 24, 2005
Yadollah Delaviz, Lewis Center, OH (US);
Bharat Patel, Dublin, OH (US);
Mark Polasky, Mogadore, OH (US);
Raymond M. Breindel, Hartville, OH (US);
Roland R. Loh, Stow, OH (US);
Mitchell Z. Weekley, Tallmadge, OH (US);
Yadollah Delaviz, Lewis Center, OH (US);
Bharat Patel, Dublin, OH (US);
Mark Polasky, Mogadore, OH (US);
Raymond M. Breindel, Hartville, OH (US);
Roland R. Loh, Stow, OH (US);
Mitchell Z. Weekley, Tallmadge, OH (US);
Owens Corning Intellectual Capital, LLC, Toledo, OH (US);
Abstract
Disclosed is a method for making polystyrene foam which utilizes one or more atmospheric gases, particularly combinations of HFCs and CO, as the blowing system in combination with a polymer processing aid (PPA), typically an ester that is relatively non-volatile at the extrusion temperature range. The blowing system and the PPA may both be introduced into the molten thermoplastic polystyrene resin or the PPA may be incorporated in the solid source polystyrene resins. The resulting foams will typically exhibit improved dimensional stability at ambient temperatures.