Patent ID: 6447859
Filing Date: 2002-09-10
Classification: C08G,C08J,Y10T

Abstract:
A polyester resin produced by polymerizing a monomer mixture comprising a glycol component containing 5 to 60 mol % of a spiroglycol represented by Formula I: and 30 to 95 mol % of ethylene glycol, and a dicarboxylic acid component containing 80 to 100 mol % of terephthalic acid and/or an ester thereof; the polyester resin satisfying the following requirements (1) to (4):(1) an intrinsic viscosity of 0.4 to 1.5 dL/g when measured at 25Â° C. in a 6/4 by mass mixed solvent of phenol/1,1,2,2-tetrachloroethane; (2) a melt viscosity of 700 to 5,000 PaÂ·s when measured at 240Â° C. under a shear rate of 100 sâˆ’1; (3) a molecular weight distribution of 2.5 to 12.0; and (4) a glass transition temperature of 90Â° C. or higher, and a cooling crystallization exotherm peak of 5 J/g or lower, when measured by a differential scanning calorimeter.