Method for preparing copolyester-ether film

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United States of America Patent

PATENT NO 9234076
APP PUB NO 20150284508A1
SERIAL NO

14506736

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Abstract

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A method for preparing a copolyester-ether film is provided, wherein the method includes a recycled polyester is provided. Alcoholysis is performed by reacting the recycled polyester with a diol to form a first intermediate, wherein the molar ratio of the recycled polyester to the diol is 1:1.8-2.5. Transesterification is performed to the first intermediate to form a second intermediate, wherein the temperature of transesterification is between 190° C. and 230° C. A polyol is added to the second intermediate and polymerization is performed to form a copolyester-ether, wherein the weight percent of the polyol in the copolyester-ether is 24-55%. The copolyester-ether is manufactured into a flexible film.

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Patent Owner(s)

Patent OwnerAddress
FAR EASTERN NEW CENTURY CORPORATIONTAIPEI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kuo, Ro-Ben Zhongli, TW 1 2
Ou, Fu-Wen Zhongli, TW 3 4

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