Abstract: A polymer composition comprising a) a thermoplastic polymer, b) a polyfunctional epoxy compound and c) an imidazolidone compound. The invention relates also to a method of improving the gloss of such polymers, to the polymers themselves with improved gloss, and also to the use of polyfunctional epoxy compounds and imidazolidones for improving gloss.

Abstract: A stabiliser combination, mainly for PVC, is described, comprising A) at least one compound of formula I  wherein R*1 and R*2 are each independently of the other C1-C12alkyl, C3-C6lkenyl, C5-C8cycloalkyl that is unsubstituted or substituted by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or by chlorine atoms, or C7-C9phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C1-C4alkyl, C1-C4alkoxy, C5-C8cycloalkyl or by hydroxy groups or chlorine atoms, and R*1 and R*2 may additionally be hydrogen and C1-C12alkyl, and Y is S or O, and B) at least one compound from the following groups: B1) perchlorate compounds, B2) glycidyl compounds, B3) beta-diketones and beta-keto esters, B4) dihydropyridines and polydihydropyridines, B5) polyols and disaccharide alcohols, B6) sterically hindered amines (tetraalkylpiperidine compounds), B7) alkali aluminosilicates (zeolites), B8) hydrotalcites, B9) alkali aluminocarbonates (dawsonite

Abstract: A stabilizer combination, mainly for PVC, is described, comprisingA) at least one compound of formula I ##STR1## wherein R*.sub.1 and R*.sub.2 are each independently of the other C.sub.1 -C.sub.12 alkyl, C.sub.3 -C.sub.6 lkenyl, C.sub.5 -C.sub.8 cycloalkyl that is unsubstituted or substituted by from 1 to 3 C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.5 -C.sub.8 cycloalkyl or by hydroxy groups or by chlorine atoms, or C.sub.7 -C.sub.9 phenylalkyl that is unsubstituted or substituted at the phenyl ring by from 1 to 3 C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.5 -C.sub.8 cycloalkyl or by hydroxy groups or chlorine atoms,and R*.sub.1 and R*.sub.2 may additionally be hydrogen and C.sub.1 -C.sub.

Abstract: Compositions are described, comprisingA) rigid or semi-rigid PVC having a plasticiser content of up to 20%, andB) at least one compound of formula 1, ##STR1## wherein X is O or S, and R is H or phenyl, with the proviso that compounds from the groups of the perchlorate compounds, glycidyl compounds, beta-diketones, beta-keto esters, dihydropyridines, polydihydro-pyridines, polyols, disaccharide alcohols, sterically hindered amines (tetraalkylpiperidine compounds), alkali alumosilicates (zeolites), hydrotalcites, alkali alumocarbonates (dawsonites) are not present.

Abstract: The invention relates to a process for the preparation of a pulverulent diorganotin mercaptocarboxylate, which comprises reacting a diorganotin oxide of the formula I, ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are C.sub.1 -C.sub.18 alkyl, at a temperature in the range from 35.degree. C. to 70.degree. C. in the absence of solvents and/or adsorbents with a mercaptocarboxylic acid of the formula II ##STR2## in which R.sup.3 is alkylene having 1 to 18 C atoms or is phenylene, and subjecting the reaction mixture and product during the reaction and the subsequent cooling phase to constant thorough mixing.The process products are suitable for the stabilisation of chlorine-containing polymers against the damaging effect of light, oxygen and/or heat.

Abstract: The invention relates to a process for the preparation of a pulverulent diorganotin dicarboxylate, which comprises reacting a diorganotin oxide of the formula I, ##STR1## in which R.sup.1 and R.sup.2, independently of one another, are C.sub.1 -C.sub.8 alkyl, at a temperature in the range from 45.degree. C. to 70.degree. C. in the absence of solvents and adsorbents with a dicarboxylic acid of the formula II ##STR2## in which R.sup.3 is C.sub.1 -C.sub.18 alkylene, cycloalkylene having 5 to 7 carbon atoms, phenylene, C.sub.1 -C.sub.18 alkenylene or C.sub.1 -C.sub.8 alkylene substituted by 1 or 2 hydroxyl groups, or its anhydride, and subjecting the reaction mixture and the product during the reaction and the subsequent cooling phase to constant thorough mixing. The diorganotin dicarboxylates thus obtained are suitable for the stabilization of chlorine-containing polymers against the damaging effect of light, oxygen and/or heat.

Abstract: There is disclosed a process for the preparation of a powdered stabilizer mixture comprising tin stabilizers and adsorbents, which process comprises mixing and heating at least one carboxylic acid or a carboxylic anhydride, at least one organotin oxide and at least one, preferably mineral, adsorbent.