Abstract: &bgr;-Ketoesters and their enamines derived from alcohols or polyols are suitable for stabilizing polymers, and are represented by formulae: A[(O—CHR4—Z—CHR5)m—O—CO—CHR1—CO—R3]n and A[(O—CHR4—Z—CHR5)m—O—CO—CR1═C(—NHR2)—R3]n, wherein: A is the residue of an alcohol or polyol selected from hydroxyalkanoic acid esters, sugars and their glycosides, sugar alcohols, sugar acids and their esters, and oligosaccharides; m is an integer number from 0 up to 6; n is a number from 1 up to the total number of hydroxyl groups in the polyol; R1 is hydrogen, C1-C8 alkyl, C3-C8 alkenyl or cycloalkyl (alkyl) or C6-C8 aryl or aralkyl; R2 is hydrogen, C1-C6 alkyl, C2-C6 hydroxyalkyl or C3-C6 alkenyl; R3 is C1-C18 alkyl, alkoxy or alkylamino, C3-C18 alkenyl, alkanoylmethyl, alkoxycarbonylmethyl or cycloalkyl(alkyl), C6-C18 aryl, aryloxy, arylamino, aralkyl, aralkoxy or aralkylamino, or C8-C18 aroylmethyl, arylox

Abstract: Natural cyclic polyalcohols such as polyfructoses and, dehydration products of sugar alcohols can be used for stabilising thermoplastic polymers, at a ratio of 0.001-5 phr of polyol with respect to the polymer. The cyclic polyol is in particular inulin or sorbitan. The polymer to be stabilised is in particular PVC, PE, PP or a halogenated rubber.

Abstract: The invention relates to a organo-tin-containing complex stabilizer for synthetic resin compositions of the formula I:M.sup.2+.sub.1-a-b(2+x) Al.sup.3+.sub.a [Sn(R).sub.(2-x) ].sub.b.sup.(2+x)+ (OH).sup.-.sub.2-b(2+x) A.sup.n-.sub.a/n *mH.sub.2 O (I)wherein M.sup.2+ stands for at least one divalent metal cation, R stands for a C.sub.1-12 linear or branched alkyl group, A.sup.n- stands for an n-valent anion or mixtures of anions, and the following conditions apply:0<a<0.5; 0<b<0.1; 0.ltoreq.x.ltoreq.1; 0<a+b(2+x)<0.5; 0.ltoreq.m.ltoreq.2.The invention also relates to a method for the preparation of these stabilizers and their use in synthetic resin compositions, preferably halogen-containing synthetic resin compositions, or (co)polymers obtained by Ziegler Natta polymerization processes.

Abstract: The present invention relates to a composition based on polymer and/or co-polymers of vinyl chloride including organotin salts and/or one or more divalent metal salts of a carboxylic acid or phenol, and one or more metal salts of the organic compounds of general formula A: ##STR1## in which R.sub.1 represents a linear or branched alkylene or alkenylene radical having up to 20 carbon atoms, an aralkylene radical having from 7 to 20 carbon atoms or an arylene or cycloalkylene radical having from 6 to 20 carbon atoms, the cycloalkylene radicals optionally containing carbon--carbon double bonds; these radicals optionally being unsubstituted or substituted for example by one or more or halogen atoms or hydroxyl groups or, for aryl or cycloalkylene radicals, by one or more methyl, ethyl or methoxy radicals, the above-mentioned radicals optionally modified by the presence in an aliphatic chain of one or more --O--, --CO-- or CO.sub.2 -chain members or N; R.sub.2 represents O,S,NR.sub.5 or NNHR.sub.5 wherein R.sub.

Abstract: A homogeneous, clear liquid stabilizer suitable for use in a vinyl chloride polymer comprising a liquid mixture of metal soap stabilizer, for example, a mixture of a mixed barium/zinc soap stabilizer and solubilized metal perchlorate, for example, a barium perchlorate. The liquid stabilizer is formed by combining a solubilized metal perchlorate and a liquid mixture of the metal soap stabilizer.