Far Eastern New Century Corporation

Lin-Chien Yu

Der-Ren Hwang

Cheng-Ting Wang

Ken-Yuan Chang

Chun-Yi Li

Chih-Ta Lee

Fa-Chen Chi

Yong-Yi Wu

Cheng-Tar Wu

Kuo-Cheng Lu

A copolyester having a low melting point and a high crystallinity includes a first recurring unit, a second recurring unit, and a third recurring unit, which are respectively represented by Formulas (I), (II), and (III) defined herein. A molar ratio of the first recurring unit to the second recurring unit ranges from 1:0.5 to 1:3, and a molar ratio of the first recurring unit to the third recurring unit ranges from 1:1.3 to 1:8. The copolyester may have a melting point lower than 220&#xb0; C. and a lattice enthalpy greater than 12 J/g. A process for producing the copolyester and a fiber made from the copolyester are also disclosed.

Copolyester having low melting point and high crystallinity

A teeth-whitening gel is provided. The main ingredient of the teeth-whitening gel comprises a polypeptide having halamine (N&#x2014;X bond, X&#x2550;Cl, Br or I) groups and a high molecular weight. By the redox properties of halamine group, the gel contacting with the teeth's surface can bleach and whiten the teeth.

Teeth-whitening gel

A biocidal polymer including at least one repeating unit of formula (A): wherein:

Biocidal polymer and process for preparing the same

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Taipei, Taiwan

Lin-Chien Yu