Aromatic polyester

Details Aromatic polyester Aromatic polyester

C - Chemistry, Metallurgy

08

G

C08G 63/193 (2006.01)

Patent

CA 2714083

There is provided an aromatic polyester suitable for optical applications, which has not only high heat resistance and transparency, but also enhanced fluidity at a relatively low molding temperature of less than 300°C despite its high molecular weight to be substantially colorless after the molding process. The aromatic polyester of the present invention comprises polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof; wherein the polyhydric phenol residues comprise polyhydric phenol residues represented by Formula (I): -O-Ar-W1x-Ar-O- and/or Formula (II): -O-Ar-O-, and bulky polyhydric phenol residues represented by Formula (III):-O-Ar-W2-Ar-O-; wherein the molar ratio of the polyhydric phenol residues represented by Formula (I) and/or Formula (II) to the polyhydric phenol residues represented by Formula (III) is in the range of 100:0 to 30:70 (exclusive of 100:0).

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