| 摘要 |
The present invention provides a phthalate-free plasticizer for polymer resins. The phthalate-free plasticizer according to the invention includes 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 a re different alkyl or aryl groups. Phthalate-free plasticizers according to the invention can be made by esterifying glycerin with a mixture of carboxylic acids in the presence of a catalyst. In the presently most preferred embodiment of the invention, the mixture of carboxylic acids includes benzoi c acid and butanoic acid. The plasticizer according to the invention can be us ed to modify the properties of a wide variety of polymers including vinyl polymers, rubbers, polyurethanes, and acrylics, and has superb thermostabili ty and low volatility.
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