Method for stabilizing an organic material using a stabilizer mixture

A method for stabilizing an organic material by reducing degradation induced by a chlorine containing compound having a chlorine content in the range of 100 to 600 ppm, wherein the method comprises incorporating into the organic material a stabilizer mixture comprising:

• (i) at least one compound (A) selected from general formula (I), general formula (II), general formula (III), general formula (IV), and mixtures thereof,
• compound (A) of general formula (I)
• wherein
• A1 is selected from linear or branched, substituted or unsubstituted C2-C18 alkylene, substituted or unsubstituted C5-C7 cycloalkylene and C1-C4 alkylenedi(C5-C7 cyclo alkylene),
• A2 is independently selected from H, linear or branched, substituted or unsubstituted C1-C12 alkyl, C1-C12 alkyloxy, substituted or unsubstituted C5-C12cycloalkyl and C5-C12cycloalkyloxy,
• A3 and A4 are independently selected from H, linear or branched, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C5-C12 cycloalkyl and a group of the formula (a-1),
• or
• A3 and A4, together with the nitrogen atom to which they are bonded, form a 5- to 10-membered heterocyclic ring, and
• a is an integer in the range of 1 to 20 and the repeating units are the same or different,
• compound (A) of general formula (II)
• wherein
• x1 and x2 are independently selected from linear or branched, substituted or unsubstituted C1 to C30 alkyloxy,
• compound (A) of general formula (III)
• wherein
• Y1 is linear or branched, substituted or unsubstituted C3 to C20 alkyl,
• Y2 is linear or branched, substituted or unsubstituted C1 to C30 alkyl;
• and
• compound (A) of general formula (IV)
• wherein
• Y1 is linear or branched, substituted or unsubstituted C3 to C20 alkyl,
• Y3 is independently selected from linear or branched, substituted or unsubstituted C3 to C20 alkyl, and C3 to C20 alkylidene,
• X is linear or branched, substituted or unsubstituted C2 to C5 alkyl,
• n is an integer in the range of 1 to 8, and
• (ii) at least one UV absorber;
• and
• (iii) at least one metal hydroxide.