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:
Sep. 21, 1993
Filed:
May. 18, 1992
Jerry E White, Midland, MI (US);
Edmund J Stark, Midland, MI (US);
Anthony P Haag, Midland, MI (US);
Daniel J Murray, Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Hydroxy-functionalized polyethers having imide groups in their backbones are prepared by contacting an imide-containing bisphenol with the diglycidyl ether of the same or another bisphenol under conditions sufficient to cause the nucleophilic phenolic hydroxyl moieties to react with epoxy groups. These poly(hydroxy ether imides) possess a combination of high barrier to oxygen transmission (i.e., oxygen transmission rates of less than 10.0 cm.sup.3 -mil/100 in.sup.2 -atm-day) and high heat resistance (i.e., T.sub.g above 120.degree. C.). These polymers are suitable for use in the manufacture of packaging materials with high barrier to oxygen.