POLIESTER BARU DAN PROSES PEMBUATAN POLIESTER

• Main Author: KOJI NAKAMACHI
• Format: Patent
• Language: Indonesian
• Published: 04.05.2000
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

A polyester which comprises dicarboxylic acid constituent units derived from terephthalic acid and naphthalenedicarboxylic acid and diol constituent units derived from ethylene glycol, and which has the following properties: 40 to 99.5% by weight of constituent units derived from terephthalic acid, 0.5 to 60% by weight of constituent units derived from naphthalenedicarboxylic acid and 0 to 25% by weight of constituent units derived from isophthalic acid, based on the total amount of dicarboxylic acid constituent units, 95 to 100% by weight of constituent units derived from ethylene glycol and 0 to 5% by weight of constituent units derived from a polyalkylene glycol having an alkylene oxide chain of 2 to 10 carbon atoms, based on the total amount of diol constituent units, an intrinsic viscosity of 0.5 to 1.5 dl/g, a melting point (Tm ( DEG C)), as measured by a differential scanning calorimeter, which satisfies the following formula (I): wherein mI is the proportion (% by mol) of constituent units derived from isophthalic acid to the total amount of dicarboxylic acid constituent units, and mN is the proportion (% by molÖ) of constituent units derived from naphthalenedicarboxylic acid to the total amount of dicarboxylic acid constituent units, and an amount of constituent units which have the sequence naphthalenedicarboxylic acid-ethylene glycol-terephthalic acid (LNET (% by mol)), as measured by H-NMR, which satisfies the following formula (II): wherein mN is the proportion (% by mol) of constituent units derived from naphthalenedicarboxylic acid to the total amount of dicarboxylic acid constituent units.