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. 15, 1987
Filed:
Sep. 02, 1986
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
Novel cellulose derivative, process for preparing the same and sulfur dioxide gas permselective membrane comprising said derivative. Hydrocarbysulfinylethyl cellulose represented by the formula (I): ##STR1## wherein, X may be the same or different and represents hydrogen atom or hydrocarbylsulfinylethyl group represented by the formula (II): ##STR2## wherein, R may be the same or different and represents an alkyl group having 1 to 6 carbon atoms or a phenyl group, with the average substitution degree with the hydrocarbylsulfinylethyl group of the formula (II) per glucose unit being at least 0.05, and sulfur dioxide gas permeation membrane comprising said cellulose derivative. This membrane is excellent in sulfur dioxide gas permselectivity.