Abstract: A stabilizer composition is disclosed for increasing the resistance to yellowing and loss of clarity of a vinyl halidepolymer upon heating, which comprises a thio-1,3-dicarbonyl compound represented by the formula ##STR1## in which M represents hydrogen, an organotin group or a metal, R represents hydrogen, a hydrocarbon group or a group ##STR2## each of R, R", and R'" represents hydrogen or an organic group, X is oxygen or sulfur, and n representing the valence of M is an integer from 1 to 4, and at least one heat stabilizer which is an alkyltin compound or a metal salt of a non-nitrogenous monocarboxylic acid or of a hydrocarbon-substituted phenol.Stabilized vinyl halide polymer compositions, in which the above stabilizer composition is used to improve the resistance to yellowing and the clarity, are also disclosed.

Abstract: Stabilizer compositions are provided to enhance the resistance to deterioration on heating of a halogen-containing resin, comprising (A) a sulfide compound of four-valent tin having linked to a tin atom at least one sulfide group, and through carbon 1 or 2 alkoxycarbonylalkylene groups having from 1 to 8 carbon atoms in the alkoxy group and from 2 to 3 atoms in the alkylene group; and (B) a tin mercaptoalkylenecarboxylic acid ester having linked to a tin atom through sulfur 2 or 3 mercaptoalkylenecarboxylic acid alkyl ester groups having 1 or 2 carbon atoms in the mercaptoalkylene group and 4 to 18 carbon atoms in the alkyl ester group, and through carbon 1 or 2 alkoxycarbonylalkylene groups having from 1 to 8 carbon atoms in the alkoxy group and 2 or 3 carbon atoms in the alkylene group. The stabilizer composition contains at lesast 5% by weight of the sulfide compound (A).Halogen-containing resin compositions stabilized with the above stabilizer composition are also provided.

Abstract: A stabilized halogen-containing resin composition by incorporating therein (a) at least one kind of mono alkyltin compounds or dialkyltin compounds and (b) at least one kind of monoalkoxycarbonylalkyltin compound or bis(alkoxycarbonylalkyl)tin compounds.

Abstract: A stabilizer composition is disclosed that enhances the resistance to deterioration upon heating of vinyl chloride polymers. The stabilizer composition comprises (A) a metal salt of a non-nitrogenous monocarboxylic acid or hydrocarbon-substituted phenol and (B) an aromatic carboxylic acid ester of a polyhydric alcohol having at least two alcoholic hydroxyl groups in a polyhydric alcohol aromatic carboxylic acid ester group.Vinyl chloride polymer compositions stabilized with the above disclosed stabilizer composition are also disclosed.

Abstract: Processability, color, and mechanical properties upon heating of a rubber modified styrene polymer are improved by incorporating in the polymer a new sulfide compound of four-valent tin having linked to tin through carbon 1 or 2 alkoxycarbonylalkylene groups having 1 to 8 carbon atoms in the alkoxy group and 2 to 3 carbon atoms in the alkylene group.

Abstract: Improved clarity and resistance to deterioration on heating of polyvinyl fluoride and vinyl chloride polymers is obtained by employing a stabilizer composition consisting essentially of (A) a heterocyclic nitrogen compound having as part of a 5 or 6 membered heterocyclic ring the group ##STR1## in which R is hydrogen, aryl, or alkyl having 1 to 12 carbon atoms, and X is oxygen or sulfur, and (B) one or more 1,2-epoxides, organic phosphites, or stannous tin, zinc, magnesium, aluminum, potassium, sodium, calcium, strontium, or barium salts of non-nitrogenous monocarboxylic acids having from 6 to 24 carbon atoms or hydrocarbon-substituted phenols having from about 10 to about 30 carbon atoms.