Stabilizer mixtures for plastics
AssigneeBASF SE
InventorsGustav Bock, Hubert Trauth, Wilhelm Weber, Peter Lechtken
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Abstract
Stabilizer mixtures for stabilizing plastics comprising one part by weight of a chroman derivative (I) of the general formula ##STR1## where R= ##STR2## where Z=C.sub.7 -C.sub.30 -alkyl, --CH.sub.2 CH.sub.2 --S--[C.sub.1 -C.sub.30 -alkyl] or ##STR3## and from 5 to 14 parts by weight of an organic phosphite of the general formula (II) ##STR4## where R.sup.1, R.sup.2 and R.sup.3 are identical of different alkyl and/or aryl or of an organic phosphonite of the formula (III) ##STR5## where +is C(CH.sub.3).sub.3, a mixing ratio (a):(b) of from 1:6 to 1:10 being preferred.
Claims6
A stabilizer mixture for stabilizing a plastic material, comprising (a) one part by weight of a chroman derivative (I) of the formula ##STR18## where R= ##STR19## where Z=C.sub.7 -C.sub.30 -alkyl, --CH.sub.2 CH.sub.2 --S--[C.sub.1 -C.sub.30 -alkyl] or ##STR20## and (b) from 5 to 14 parts by weight of an organic phosphite of the formula (II) ##STR21## where R.sup.1, R.sup.2 and R.sup.3 are identical or different alkyl and/or aryl or of an organic phosphonite of the formula (III) ##STR22## where + is C(CH.sub.3).sub.3.
Dependencies are inferred from the claim text.