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. 21, 1992
Filed:
Aug. 17, 1990
Applicant:
Inventor:
Bradley D Stevens, Frazeysburg, OH (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 451 ; 264 454 ; 264 51 ; 427377 ; 4273931 ; 4273935 ;
Abstract
A method of making antistatic vinylaromatic polymer-containing articles, and articles produced thereby, which includes immersing expandable vinylaromatic polymer-containing articles, having a blowing agent dispersed therein, in a bath containing an ethoxylated amine compound for a length of time sufficient to allow the ethoxylated amine compound to penetrate into the expandable articles to an extent such that the expandable articles, when expanded to a density of at most about 1.5 pcf, dissipate an induced 5000 volt charge to substantially 0 volts in less than 2 seconds.