US 12,715,845 B2 · Process for preparing N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine

Abstract

The present invention relates to a process for preparing N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine. The present invention further relates to the use of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine to prepare poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-s-triazine-2,4-diyl]-[(2,2,6,6-tetramethyl-4-piperidyl)imino]-hexamethylene-[(2,2,6,6-tetramethyl-4-piperidyl)imino], reaction material of 1,6-hexanediamine, N,N′-bis (2,2,6,6-tetramethyl-4-piperidine-yl),2,4,6-trichloro-1, 3,5-triazine,N-butyl-1-butylamine, and N-butyl-2,2,6,6-tetramethyl-4-piperidineamine, N,N′-bis(2,2,6,6-tetramethyl-4-piperidyl)-N,N′-diformylhexamethylenediamine, and 1,6-Hexanediamine, N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-, polymer with 2,4-dichloro-6-(4-morpholinyl)-1,3,5-triazine.

Claims16

Dependent claims

A process for preparing N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine, wherein the process comprising:

(i) iminating 2,2,6,6-tetramethylpiperidin-4-one with 1,6-hexamethylenediamine to obtain a first mixture comprising N,N′-(hexane-1,6-diyl)bis(2,2,6,6-tetramethylpiperidin-4-imine);
(ii) hydrogenating N,N′-(hexane-1,6-diyl)bis(2,2,6,6-tetramethylpiperidin-4-imine) of the first mixture to obtain a hydrogenated second mixture comprising 50 to 99.5 wt % of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine;
and
(iii) continuous hydrogenating of the second mixture in a fixed bed reactor to obtain N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine.

1 more element

Dependencies are inferred from the claim text.

Process for preparing N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine

Life of this patent

Process for preparing N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine

Life of this patent

Abstract

Claims16