Process for the preparation of ketimine curing agents
US6573357B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Jul 11, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the production of aliphatic ketimines having a polyalkylenepolyamine content of less than 1% by weight from the corresponding aliphatic ketones and polyalkylenepolyamines comprising the steps of: (a) forming a mixture of said aliphatic ketones and said polyalkylenepolyamines wherein the weight ratio of said ketone to said polyalkylenepolyamine is in the range of about 3.0:1 to about 10:1; (b) heating said mixture to a refluxing temperature between about 170° F. and 230° F. while continuously removing water to form the corresponding aliphatic ketimine; and (c) isolating said aliphatic ketimine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.