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:
Feb. 05, 1991
Filed:
May. 30, 1989
Thomas A Johnson, Orefield, PA (US);
Ismail O Abdalmuhdi, Princeton, NJ (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
This invention relates to propylene-linked polyethylene polyamines and a process for preparing such propylene-linked polyethylene polyamines. These propylene-linked polyethylene polyamines are characterized as having high molecular weight and the amine value is distributed over a wide range of primary, secondary, and tertiary amine functionality. The propylene-linked polyethylene polyamines are prepared by reacting a polyamine containing an ethylene amine functionality with acrylonitrile or methacrylonitrile to form a cyanoethylated polyamine containing the ethylene linkage and then reductively alkylating the resulting cyanoethylated derivative in the presence of a polyamine containing an ethylene linkage. Typically, a polyethylene polyamine such as diethylenetriamine or triethylene tetramine is reacted with acrylonitrile and then hydrogenated under reductive alkylation conditions.