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. 08, 1981
Filed:
Jun. 01, 1979
Applicant:
Inventor:
Charles J McDonald, Midland, MI (US);
Assignee:
The Dow Chemical Co., Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564204 ; 526312 ; 544379 ; 564123 ; 564208 ;
Abstract
N-(aminomethyl)-.alpha.,.beta.-ethylenically unsaturated carboxamides such as N-(dimethylaminomethyl)acrylamide are readily prepared without coincident production of saturated impurities by reacting at a pH below 7 an .alpha.,.beta.-ethylenically unsaturated carboxamide such as acrylamide or N-substituted derivative such as N-methylolacrylamide with a secondary amine such as dimethylamine, and a lower aldehyde such as formaldehyde when such is required. The resulting aminomethyl carboxamides are polymerized at a pH of 7 or less to form polymers containing essentially no gelled product.