| abstract |
The solution relates to 1,2,2,6,6-pentamethyl-4-n- (? - bromoalkoxy) piperidines of formula I and the processntheir preparation, which consists in thatn1,2,2,6,6-pentamethyl-4-hydroxypiperidine is reactednof formula II with α, ω-dibromoalkanenof Formula III with vigorous stirring innheterophasic system, with one phasenforming an aqueous alkali hydroxide solutionnand the species phase generates an organic solventnimmiscible with the aqueous phase in the presencenof the anionic salt type catalystntemperature range of 10 to 100 ° C. compoundsnof Formula I are used as light stabilizersnfor polymers |