Patent ID: 6762225
Filing Date: 2004-07-13
Classification: C08K

Abstract:
A light stabilizer composition made by the process comprising the steps of:a) mixing a polymer with at least one polyalkylpiperdine wherein the polyalkylpiperidine is present in an amount from 0.1 to 70% by weight, based on the weight of the composition, and wherein the polyalkylpiperidine is an oligomeric or a high molecular-weight polyalkylpiperidine selected from the group consisting of compounds of formulae (I) to (VIII) â€ƒpoly-{[6-[(1,1,3,3-tetramethylbutyl)-imino]-1,3,5-triazine-2,4-diyl][2-(2,2,6,6-tetra-methylpiperidyl)-amino]-hexamethylene-[4-(2,2,6,6-tetramethylpiperidyl)-imino]} (I), â€ƒ1,3,5-triazine-2,4,6-triamine N,Nâ€²â€³-[1,2-ethane-diyl-bis[[[4,6-bis-[butyl(1,2,2,6,6-penta-methyl-4-piperidinyl)amino]-1,3,5-triazine-2-yl]imino]-3,1-propanediyl]]bis[Nâ€²,Nâ€³-dibutyl Nâ€²,Nâ€³-bis(1,2,2,6,6,-pentamethyl-4-piperidinyl)-(II), â€ƒpoly-[(6-morpholino-s-triazine-2,4-diyl)-[2,2,6,6-tetramethyl-4-piperidyl)imino]-hexa-methylene[(2,2,6,6-tetramethyl-4-piperidyl)imino] (III), â€ƒpoly-(N-&bgr;-hydroxyethyl-2,2,6,6-tetramethyl-4-hydroxy-piperidyl-succinate) (IV), â€ƒpolymethylpropyl-3-oxy-[4(2,2,6,6-tetramethyl)-piperidinyl]-siloxane (V), Oligomer obtained by the reaction and subsequent oligomerization of 2,2,4,4-tetramethyl-21-oxo-7-oxa-3,20-diazadispiro-[5.1.11.2]-heneicosane or its hydrochloride with epichlorohydrine, (VI), â€ƒ1,3-propanediamine, N,Nâ€³-1,3-ethanediylbis-, polymer with N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and 2,4,6-trichloro-1,3,5-triazine (VII), â€ƒpoly-[3-elcosyl-(-tetracosyl)-1-(2,2,6,6-tetramethylpiperidin-4-yl)-pyrrolidin-2,5-dione] (VIII), or a low molecular-weight polyalkylpiperidine selected from the group consisting of compounds of formulae (IX) to (XIII): â€ƒbis-2,2,6,6-tetramethyl-4-piperidyl-sebacate (IX), â€ƒpropanedioicacid, [(4-methoxyphenyl)-methylene]-bis(1,2,2,6,6-pentamethyl-4-piperidinyl)ester (X), â€ƒa mixture of esters of 2,2,6,6-tetramethyl-4-piperidinol and higher fatty acids (mainly stearic acid) (XI), â€ƒ2,2,6,6-tetramethyl-21-oxo-7-oxa-3,20-diazadispiro[5.1.11.2]-heneicosane (XII), â€ƒ2,2,4,4-tetramethyl-21-oxo-7-oxa-3,20-diazadispiro[5.1.11.2]-heneicosan-20-propanoic-acid-dodecylester (XIII), or a polymer bound polyalkylpiperidine, and at least one free radical generator to form a mixture b) melt-blending of the mixture at a temperature above the melting point of the polymer and above the decomposition temperature of the free radical generator and at shear conditions sufficient to blend the components.