124172-53-8

Usage

Flammability and Explosibility

Nonflammable

Upstream product

• 629-03-8 1 ,6-dibromohexane 
• 124172-45-8 N-(2,2,6,6-tetramethylpiperidin-4-yl)formamide 
• 61260-55-7 N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-diaminohexane 
• 77287-34-4 formamide 

Relevant academic research and scientific papers

Method for preparing hindered amine light stabilizer and method for preparing intermediate

A method for preparing a hindered amine light stabilizer N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N,N'-dialdehydo alkyl diamine comprises the steps of causing 4-formamido-2,2,6,6-tetramethyl-piperidine, dibromo alkane and a catalyst to be subjected to backflow stirring reaction for 1-24 h, instantly slowly adding water, cooling while stirring, performing washing, filtration and drying, and obtaining the product. A method for preparing an intermediate 4-formamido-2,2,6,6-tetramethyl-piperidine comprises the steps of causing 2,2,6,6-tetramethyl-piperidine, formamide, Lewis acid catalyst and an alkali-binding agent to undergo heating reaction for 1-24 h at normal pressure, performing cooling, alkaline wash, filtration, wash and drying. A synthesis process is simple and easy to operate, and aftertreatment is convenient; the required raw material, catalyst and solvent are easy to obtain, and the methods conform to the economy principle and is safe, environmentally friendly and high in product yield.

Preparation method of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N, N'-dialdehyde hexamethylenediamine

The invention discloses a preparation method of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N, N'-dialdehyde hexamethylenediamine. The preparation method includes the steps: 1) adding, by mass, 1 part of formamide, 2-4 parts of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-1,6-hexamethylenediamine and catalyst accounting for 1%-10% of total mass of hexamethylenediamine and formamide mixture into a reactor under nitrogen protection, performing return flow agitation at the temperature of 130-180 DEG C for 3-8h to obtain reaction liquid; (2) immediately and slowly adding enough water into the reaction liquid obtained in the step 1), stirring while cooling, washing, filtering and drying to obtain a product. The effective catalyst is selected, so that product purity is increased, the product can be obtained by only washing, operation is simplified, environmental friendliness is realized, and production cost is lowered.

METHOD FOR THE PRODUCTION OF 4-FORMYLAMINOPIPERIDINE DERIVATIVES

Method for producing 4-formylaminopiperidine derivatives of the formula (I) and also the acid addition salts of these compounds, comprising the reaction of 4-aminopiperidine derivatives of the formula (II) or the acid addition salts of these compounds in the presence of compounds of the formula (III) and the use of 4-formylaminopiperidine derivatives of the formula (I) produced in such a way for protecting inanimate organic material against the effect of light.

4-formylaminopiperidine derivatives, their use as stabilizers and organic material stabilized with the said derivatives

4-Formylaminopiperidine derivatives of the formula (I) STR1 where n is 1 or 2, R1 to R4 are each alkyl or R1 and R2 or R3 and R4 are tetra- or pentamethylene, R5 is hydrogen or alkyl, R6 is hydrogen, unsubstituted or substituted alkyl, alkenyl, aralkyl or acyl, and, when n is 1, Y is hydrogen, unsubstituted or substituted alkyl, alkenyl, cycloalkyl, bicycloalkyl, aralkyl, aryl, alkyl containing heterocyclic radicals, or STR2 or, when n is 2, Y is alkylene, cycloalkylene, aralkylene or arylene or is alkylene which is interrupted by oxygen, nitrogen, sulfur or a 5-membered or 6-membered heterocyclic structure, and their acid addition salts have very good stabilizing properties in plastics.