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:
Jul. 25, 2000
Filed:
Sep. 16, 1998
Applicant:
Inventors:
Larry M Miller, Suffield, OH (US);
Raymond M Breindel, Hartville, OH (US);
Mitchell Z Weekley, Akron, OH (US);
Assignee:
Owens Corning Fiberglas Technology, Inc., Summit, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; C08J / ;
U.S. Cl.
CPC ...
264 50 ; 264 53 ; 264D / ; 521 79 ; 521 97 ; 521146 ;
Abstract
In one embodiment, the present invention relates to a process for preparing a foam product including the steps of (A) forming a foamable mixture of (1) an alkenyl aromatic polymer and (2) a blowing agent under a pressure sufficient to prevent prefoaming of the mixture and (B) foaming the mixture into a region of reduced pressure to form the foam product, wherein the difference between the glass transition temperature of the foamable mixture and the foaming temperature is less than about 62.degree. C.