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. 22, 1997
Filed:
Jun. 21, 1996
Andrew N Paquet, Granville, OH (US);
Duane B Priddy, Midland, MI (US);
Chau V Vo, Souffelweyersheim, FR;
William C Pike, Midland, MI (US);
Jerry L Hahnfeld, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Dow Deutschland Inc., Stade, DE;
Abstract
Disclosed is an extruded, linear, bimodal monovinyl aromatic polymer foam having a weight average molecular weight of from about 100,000 to about 200,000, greater than 5 percent by weight of its polymer chains having a weight average molecular weight of 500,000 to 1,000,000, and less than 5 percent by weight of its polymer chains having a weight average molecular weight of greater than 1,000,000. Use of the polymer enables process pressure drop to be significantly reduced and allows the formation of a foam of lower density and larger cross-section. Further disclosed is a process for making the extruded foam.