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:
Oct. 06, 1987
Filed:
Jul. 01, 1986
John T Lai, Broadview Heights, OH (US);
Pyong N Son, Akron, OH (US);
The BF Goodrich Company, Akron, OH (US);
Abstract
A nitroamine is formed from an aliphatic amine reactant + a nitroalkane + an aldehyde with better conversion, and faster, if the aldehyde is added last, and gradually, so as not to form an alkanolamine intermediate with the aldehyde as in the prior art reactions. In particular, a diamine such as ethylene diamine (EDA) has the unique ability, even among diprimary amines, to react with nitroalkane, to form a salt intermediate to which is added an essentially solvent-free aldehyde such as paraformaldehyde to produce a reaction product consisting essentially of a mixture of (i) a mononitrodialkylenediamine with a disubstituted N-adjacent terminal C atom and (ii) a dinitrotrialkylenediamine with each N-adjacent terminal C atom being disubstituted; and the mixture is obtained in an yield of at least 90 mol %.