Dimethyl-2,6-naphthalenedicarboxylate → 2,6-Naphthalenedicarboxylic acid

Participants

Reaction Steps

Further, an esterification reaction and a transesterification reaction were carried out among dimethyl 2,6-naphthalenedicarboxylate, 6,6′-(ethylenedioxy)di-2-naphthoic acid and ethylene glycol in the presence of titanium tetrabutoxide and then a polycondensation reaction was carried out to obtain an aromatic polyester (B-1) for the film layer (B) which comprised 73 mol % of a 2,6-naphthalenedicarboxylic acid component and 27 mol % of a 6,6′-(ethylenedioxy)di-2-naphthoic acid component based on the total of all the acid components and 98 mol % of an ethylene glycol component and 2 mol % of a diethylene glycol component based on the total of all the glycol components. 0.15 wt % of silica particles having an average particle diameter of 0.3 μm and 0.10 wt % of silica particles having an average particle diameter of 0.15 μm were contained in the aromatic polyester (B-1) based on the weight of the resin composition obtained before the polycondensation reaction. This aromatic polyester (B-1) had a melting point of 240° C. and a glass transition temperature of 117° C.

Provenance & Evidence