Stabilized polyvinyl chloride resin composition
AssigneeKyowa Chemical Industry Co., Ltd.
InventorsShigeo Miyata, Tsutomu Nosu
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Abstract
Magnesium oxide is incorporated into a polyvinyl chloride resin composition comprising a polyvinyl chloride, a hydrotalcite, a .beta.-diketone compound and an organic acid salt of zinc or a polyvinyl chloride resin composition comprising a polyvinyl chloride, a hydrotalcite and an organic tin compound. Bubbling as well as discoloration can be prevented in a molded article prepared from the polyvinyl chloride resin composition. Magnesium oxide having a specific surface area of at least 50 m.sup.2 /g and an average secondary particle size smaller than 5 .mu.m is preferably used.
Claims6
A stabilized polyvinyl chloride resin composition comprising 100 parts by weight of a polyvinyl chloride resin and, incorporated therein, (a) 0.05 to 10 parts by weight of a hydrotalcite, (b) 0.01 to 5 parts by weight of magnesium oxide, (c) 0.01 to 5 parts by weight of a .beta.-diketone compound and (d) 0.01 to 5 parts by weight of an organic acid salt of zinc.
A stabilized polyvinyl chloride resin composition comprising 100 parts by weight of a polyvinyl chloride resin and, incorporated therein, (a) 0.05 to 10 parts by weight of a hydrotalcite, (b) 0.01 to 5 parts by weight of magnesium oxide and (c) 0.01 to 5 parts by weight of an organic tin compound.
Dependencies are inferred from the claim text.