Patent ID: 6844386

Claim:
A halogen-containing polymer composition comprising (a) a halogen-containing polymer and (b) a heat stabilizing amount of a shelf stable haze free liquid of an overbased alkaline earth metal salt of a fatty acid prepared according to the process of (i) reacting an alkaline earth metal base an a fatty acid with an equivalent ratio of metal base to fatty acid being greater than 1:1 in the presence of liquid hydrocarbon, (ii) carbonating the mixture to produce amorphous alkaline earth metal carbonate, (iii) adding during carbonation a dispersion of alkaline earth metal base, a liquid hydrocarbon and an aliphatic alcohol having at least 8 carbon atoms in relative amounts at a controlled rate of alkaline earth metal base addition to produce a stable haze free liquid reaction product, and (iv) removing water from the reaction product to obtain a shelf stable haze free liquid overbased alkaline earth metal salt.