Halogen-containing polymers or the recyclates thereof are stabilized by the addition of (a) a halogen-containing polymer or a recyclate thereof; (b) at least one zeolite in the form of sodium, potasssium and/or lithium, in particular at least one zeolite of formula M.sub.2 O.Al.sub.2 O.sub.3.x SiO.sub.2.y H.sub.2 O (I), wherein M is Na, K or Li, x is 2 to 12, and y is 1 to 15, with the exception of zeolite A, Na.sub.12 Al.sub.12 Si.sub.12 O.sub.48.27 H.sub.2 O and clinoptilolite Na.sub.6 Al.sub.6 Si.sub.30 O.sub.72.2 H.sub.2 O, (c) at least one organic zinc, aluminium or rare earth compound, and/or (d) at least one organotin compound, as described in more detail in claim 1.

Os polímeros halogen-containing ou os recyclates disso são estabilizados pela adição (a) de um polímero halogen-containing ou de um recyclate disso; (b) ao menos um zeolite no formulário do sodium, do potasssium e/ou do lítio, no detalhe ao menos um zeolite da fórmula M.sub.2 O.Al.sub.2 O.sub.3.x SiO.sub.2.y H.sub.2 O (i), wherein M é Na, K ou li, x é 2 a 12, e y é 1 a 15, à excecpção do zeolite A, Na.sub.12 Al.sub.12 Si.sub.12 O.sub.48.27 H.sub.2 O e clinoptilolite Na.sub.6 Al.sub.6 Si.sub.30 O.sub.72.2 H.sub.2 O, (c) composto orgânico ao menos um do zinco, do alumínio ou da terra rara, e/ou (d) ao menos um organotin composto, como descrito mais detalhadamente na reivindicação 1.

 
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