Propylene-linked polyethylene polyamines and a process for making same
US4990672A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C211/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.