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:
Aug. 10, 1982
Filed:
Dec. 19, 1980
Jaroslav Kahovec, Prague, CS;
Cexkoslovenska akademie ved, Prague, CS;
Abstract
The invention pertains to polymeric polydentate complexons (i.e. chelating agents) of general formulae I and II ##STR1## where P is a linear or three-dimensional polymeric skeleton and X is --0-- or ##STR2## while R is H, C.sub.1 -C.sub.6 alkyl, or phenyl or phenyl substituted with 1-2 C.sub.1 -C.sub.6 alkyl or alkoxy groups. Another objective of the invention is a method for producing the polymeric polydentate complexons described above, wherein a compound P -XH, where P and X have the above given meaning, reacts with 4,4'-ethylenebis(2,6-morpholinedione) the presence of an inert solvent and, if it is desired, also in the presence of acidic or basic catalysts, e.g. protic acids, Lewis acids, tertiary amines, and alkaline or alkaline earth salts of carboxylic acids.