Argus Chemical Corporation

Kenji Nakazawa

Motonobu Minagawa

Tetsuo Sekiguchi

An environmentally acceptable stabilizer composition is provided for enhancing the resistance to deterioration upon heating at 175.degree. C. of a vinyl chloride polymer from which lead, cadmium, mercury, thallium, and arsenic are substantially excluded, comprising (A) at least one zinc, alkali metal, or alkaline earth metal organic phosphate ester salt having per metal atom from one to a number equal to the valence of the metal of phosphate ester groups and from one to two organic groups per phosphate groups, the organic groups being alkyl, aryl, alkaryl, aralkyl, ether-interrupted allyl, or ether-interrupted aralkyl groups having from 1 to about 80 carbon atoms; and (B) at least one betadiketone compound having 5 to about 30 carbon atoms which is a cyclic or open-chain betadiketone or a zinc, alkali metal or alkaline earth metal salt thereof. A stabilized vinyl chloride polymer composition in which the environmentally acceptable composition is used as stabilizer is also provided.

Halogen containing resin composition

An anti-yellowing additive is provided for environmentally acceptable stabilized vinyl chloride polymer compositions from which arsenic, cadmium, lead, mercury, and thallium are substantially excluded, comprising at least one basic inorganic compound of lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, titanium, aluminum, zirconium, or tin, and a 1,3-diketone compound represented by the formula ##STR1## in which R is a hydrocarbon group having 1 to 18 carbon atoms, R' is a hydrogen atom, an acyl group ##STR2## or a hydrocarbon group having 1 to 18 carbon atoms, R' is a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms, M is a hydrogen or one of the metals lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, aluminum, and antimony, and n is the valence of the metal from 1 to 3.

Anti-yellowing composition

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.

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Urawa, Japan

Kenji Nakazawa