| 摘要 |
PURPOSE:To obtain a polyester excellent in surface properties, slidability, surface flatness, running resistance and abrasion resistance and useful for molding, e.g., a film, by performing esterification in the presence of a specified product of heat treatment and polycondensing the obtained monomers. CONSTITUTION:Terephthalic acid (derivative) is mixed with 1-4mol, per mol thereof, of an alkali (alkaline earth) metal compound (A) (e.g., LiCl), 1-4mol, per mol thereof, of a phosphorus compound (B) (e.g., methyl phosphate) and 1-3pts.wt., per pt.wt. component A, silicone compound (C) (e.g., methyl triethoxysilane), and the mixture is heated at 100-190 deg.C for 30-120min in the presence of ethylene glycol to obtain a product of heat treatment. Terephthalic acid (esterifiable derivative) is transesterified or esterified with a glycol in the presence of 0.005-0.5wt% (in terms of the metal components in component A), based on the formed polymer, said product of heat treatment and the obtained monomers are polycondensed.
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