dibenzoate dipropylene glycol dibenzoate and mixtures containing two or more of these esters the present plasticizer compositions can be obtained by combining the primary and secondary plasticizers in the desired proportions with the polymer when the primary plasticizer is a diester derived from benzoic acid and a dihydric alcohol the plasticizer composition can be prepared by reacting a dihydric alcohol such as diethylene glycol with an aromatic monocarboxylic acid such as benzoic acid in a molar ratio of less than two moles of acid per mole of dihydric alcohol it should be apparent that this procedure results in a mixture of the corresponding mono and diesters as the final product the ratio of monoester to diester in the final product can be controlled by varying the stoichiometry and process conditions of the esterification reaction polymers that can be used with the present plasticizer compositions exhibit some degree of polarity and include but are not limited to homopolymers and copolymers obtained by the polymerization of one or more olefinically unsaturated compounds containing polar groups suitable monomers include but are not limited to halogenated olefins such as the haloethylenes and the isomeric halopropylenes and halobutylenes vinyl halides such as vinyl chloride and vinyl fluoride and halogenated ethylenically unsaturated aromatic hydrocarbons such as halostyrenes other suitable polymers include homopolymers and copolymers of acrylic and methacrylic acids and esters of these acids the present plasticizer compositions are particularly suitable for use with normally rigid halogenated polymers including but not limited to polymers of halogenated olefins such as vinyl chloride the relative concentrations of primary and secondary plasticizers present in a plastisol of the present invention will depend upon a number of variables including but not limited to 1 the compatibility of.