Method for preparing saturated polyester with excellent mechanical properties
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United States of America Patent
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Issued Date -
Feb 6, 2003
app pub date -
Jul 30, 2001
filing date -
Jul 30, 2001
priority date (Note) -
Abandoned
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Abstract
Disclosed is a method for preparing saturated polyester used in various molded products, such as films, synthetic fibers, vessels and housings. In particular, the method improves mechanical properties, including tensile strength or impact resistance, of saturated polyester. In DMT method or TPA method, the saturated polyester is synthesized through transesterification or esterification and polycondensation, in which metal compounds, such as metal acetate compounds, metal hydroxides, and metal oxides, are added in the larger amounts upon synthesis, and thus crystalline internal grains are formed, thereby improving the mechanical properties. As such, the metal compound can be used alone or in combination with a phosphorous-based compound.
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