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:
Mar. 03, 1987
Filed:
Jun. 30, 1983
Anthony Zampini, St. Louis, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
A gas separation membrane made from a benzyl-substituted polymer of 2,6-dimethyl-1,3-phenylene oxide having the structure ##STR1## wherein the benzyl substituent, X, is selected from the group consisting of ##STR2## where R.sub.1 and R.sub.2 are hydrogen, an alkyl, phenyl or a substituted phenyl or substituted alkyl of 1-6 carbon atoms where the substituent is phenyl, a nitro group, an alkoxy a phenoxy group, sulfide, sulfoxide, a carboxylic acid group or an alcohol, m is 0-0.99, n is 0-0.99 and o is 0.01-99, with m, n and o being decimal portions of a polymeric unit and the sum of m, n and o being 1, p is 1 and q is 0 or 1. Expressed in percentages of a polymeric unit, m is 0-99 percent, n is 0-99 percent and o is 1 to 99 percent. Preferably, m and n are at least 0.01.