Process for manufacturing polyester copolymers containing...

Details Process for manufacturing polyester copolymers containing... Process for manufacturing polyester copolymers containing...

C - Chemistry, Metallurgy

08

G

C08G 63/78 (2006.01) C08G 63/189 (2006.01)

Patent

CA 2165011

This invention is a process for producing polyester copolymers, which employs an acid-based and an ester-based process. The ester-based process is used to manufacture a low molecular weight naphthalate-based polymer, and the acid-based process is used to manufacture phthalate-based oligomers. The low molecular weight naphthalate-based polymer is combined with the phthalate-based oligomers, or the raw materials used to form the phthalate-based oligomers, to form a random polyester copolymer. Specifically, the process may be used to manufacture, in an ester-based process, a low molecular weight polyethylene naphthalate polymer, which is then combined with polyethylene terephthalate oligomers produced in an acid-based process, and the acid-based process is then used to continue the polymerization reaction which results in the production of a random polyethylene terephthalate/naphthalate copolymer.

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