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:
Dec. 20, 1983
Filed:
Jul. 12, 1982
Fritz Brunnmueller, Limburgerhof, DE;
Rolf Schneider, Mannheim, DE;
Michael Kroener, Mannheim, DE;
Hans Mueller, Ludwigshafen, DE;
Friedrich Linhart, Heidelberg, DE;
BASF Aktiengesellschaft, Rheinland-Pfalz, DE;
Abstract
Linear basic polymers containing, as characteristic components, from 90 to 10 mole % of copolymerized units of the formula ##STR1## and from 10 to 90 mole % of copolymerized units of the formula ##STR2## are obtained by polymerizing the compound of the formula CH.sub.2 .dbd.CH--NH--CHO (N-vinylformamide) to a polyvinylformamide in the presence of a free radical polymerization initiator and splitting off the formyl group from the resulting polymer at from 20.degree. to 200.degree. in the presence of an acid or base. The reaction products are used as retention agents, drainage assistants and flocculants in papermaking.