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. 07, 1989
Filed:
Oct. 07, 1987
Daikin Industries, Ltd., Osaka, JP;
Abstract
Disclosed are an acryloxyorganosiloxane polymer having a structural unit represented by the formula (1): ##STR1## wherein X.sup.1 is chlorine atom or fluorine atom, X.sup.2 and X.sup.3 are the same or different and each represent hydrogen atom or a group --CH.sub.2 (CF.sub.2).sub.p CF.sub.3 (wherein p is 0 or an integer of 1 to 5), Y is oxygen atom or --NH-- group, m is 0 or an integer of 1 to 5 and n is 0 or an integer of 1 to 5; an acryloxyorganosiloxane polymer further having a structural unit represented by the following formula (2) in an amount of not more than 50% by weight based on the combined weight of the structural unit of the formula (1) and the structural unit of the formula (2): ##STR2## wherein X.sup.4 is hydrogen atom, chlorine atom, fluorine atom, alkyl group having 1 to 3 carbon atoms or fluoroalkyl group having 1 to 3 carbon atoms, R is alkyl group having 1 to 20 carbon atoms or fluoroalkyl group having 1 to 20 carbon atoms (with the proviso that oxygen atom may be contained in the carbon atom chain); and a gas separating membrane prepared from the polymer having the structural unit of the formula (1) or a combination of structural unit of the formula (1) and not more than 50% by weight of structural unit of the formula (2).