Patent ID: 6811722
Filing Date: 2004-11-02
Classification: C08K

Abstract:
A method of making a phthalate-free plasticizer for polymer resins comprising esterifying glycerin with a mixture of at least two different carboxylic acids in the presence of a catalyst to form a mixture of different triesters of glycerin, at least one of which meets the formula CH2(OOR1)CH(OOR2)CH2(OOR3), wherein at least two of R1, R2, and R3 are different alkyl or aryl groups; with the proviso that said mixture of different triesters of glycerin comprises at least two selected from the group consisting of glyceryl bis(2-ethyl hexanoate) benzoate, glyceryl bis(2-ethyl hexanoate) benzoate, glyceryl bisbenzoate 2-ethyl hexanoate, and glyceryl bisbenzoate 2-ethyl hexanoate.