C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/672 (2006.01) C08G 63/60 (2006.01) C08G 63/664 (2006.01) C08G 63/80 (2006.01)
Patent
CA 2273664
Provided are a aromatic liquid crystalline polyester resin having improved low temperature processability, a film having excellent gas barrier property. The aromatic liquid crystalline polyester resin is obtained from an aromatic hydroxycarboxylic acid, an aromatic dicarboxylic acid and an aromatic diol, by optimizing formulation ratio of the above-described three components. The aromatic liquid crystalline polyester resin comprises an aromatic hydroxycarboxylic acid unit, an aromatic dicarboxylic acid unit and an aromatic diol unit, as repeating units, wherein the repeating unit (A) as an aromatic hydroxycarboxylic acid unit, is contained in an amount of 30 mol% or more based on the total amount of repeating units, and the polyester has a logarithmic viscosity of 1.5 dl/g or more, a flow temperature of 300°C or less, and a melt tension measured at a temperature higher than the flow temperature by 25°C or more of 1.0 g or more, (see formula A).
Akiyoshi Kazunori
Ohbe Yoshitaka
Yamaguchi Takanari
Akiyoshi Kazunori
Fetherstonhaugh & Co.
Ohbe Yoshitaka
Sumitomo Chemical Co. Ltd.
Yamaguchi Takanari
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