Tin-free stabilizer composition
A stabilizer composition for halogenated polymers comprising at least one zinc salt of a carboxylic acid and/or of a β-diketone, comprising a metal salt of the carboxylic acid selected from the group of the following metals: Li, Na, K, Mg, Ca, Al and Zn; a metal salt of the β-diketone selected from the group of the following metals: Li, Na, K, Mg, Ca, Al and Zn; and an amino alcohol derivative.
1. A stabilizer composition for halogenated polymers comprising at least one zinc salt of a carboxylic acid and/or of a β-diketone, comprising
a metal salt of the carboxylic acid which may be unbranched, branched, aromatic, saturated and/or unsaturated, and mono- or polybasic, and has 1 to 100 carbon atoms, and the metal salt is selected from the group of the following metals: Li, Na, K, Mg, Ca, Al and Zn,
a metal salt of the β-diketone which is selected from the group consisting of acetylacetone and Ph—CO—CH 2 —CO—R, where R is in turn an aromatic or an alkyl radical having 1 to 20 carbon atoms, and the metal salt is selected from the group of the following metals: Li, Na, K, Mg, Ca, Al and Zn, at least one amino alcohol derivative of the general formula (I)-(III)
where R1 and R2 are each independently H or CH 2 CH 2 OH, and R3 is a cyclic, acyclic, linear and/or branched alkyl radical having 18 carbon atoms, and wherein calcium oxide and calcium hydroxide are not present.
2. The stabilizer composition for halogenated polymers as claimed in claim 1 , wherein the stabilizer composition is present in a total dosage of 0.5-2.5 parts per 100 parts of resin (phr).
3. The stabilizer composition for halogenated polymers as claimed in claim 2 , comprising more than 0.2 phr of the metal salt of the β-diketone and/or more than 0.4 phr of the amino alcohol.
4. The stabilizer composition for halogenated polymers of claim 1 , additionally comprising at least one further component selected from the group consisting of: an antioxidant, a β-diketone, an iso-cyanurate, a polyol, a perchlorate compound, a lubricant, a metal compound, preferably from the group of hydrotalcite, metal oxides and metal hydroxides, a filler, a pigment, a UV stabilizer, a dihydropyridine, an epoxy compound, an organic phosphite or a uracil compound, a melamine, an amino acid, a blowing agent, a plasticizer.
5. The stabilizer composition for halogenated polymers of claim 1 , as a molten product.
6. A PVC composition in the form of pellets or of a “dryblend”, comprising the stabilizer composition for halogenated polymers of claim 1 .
7. A PVC molding comprising the stabilizer composition for halogenated polymers of claim 1 .
8. The use of the stabilizer composition of claim 1 for stabilization of a PVC composition for the production of products used in the exterior sector.