Mercaptoacetic acid, isooctyl thioglycolate and barium hydroxide used as start materials, barium bis (2 ethylhexyl thioglycolate) (Ba(2EHTG) 2), barium thioglycolate (Ba(TG)) and barium bisthioglycolate (Ba(TG) 2) were synthesized. Their optimum synthetic techniques were discussed, and some physicochemical data were reported. Infrared spectroscopy and elemental analysis methods were used to identify the structures. They were put into PVC plastic products together with antimony tris (2 ethylhexyl thioglycolate) (Sb(2EHTG) 3) under the suitable compounding, and their heat stability to PVC was studied. It is shown that these barium mercaptides have remarkable synergisms with antimony mercaptides and the long term stabilizing effect of organoantimony stabilizer can be effectively improved, reducing the amount of antimony compounds so as to avoid the decrease of its stabilizing effect.
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