Patent ID: 6120889
Filing Date: 2000-09-19
Classification: C08G,C08J,Y10T

Abstract:
An amorphous copolyester having a maximum melt viscosity at 1 radian/second and at about 260 to about 290.degree. C. of about 12,000 poise; a glass transition temperature ranging from about 88.degree. C. to about 120.degree. C.; and an inherent viscosity of at least about 0.65, said amorphous copolyester comprising the reaction product of a diol component and a dicarboxylic acid component, wherein:the diol component comprises residues of from about 5 to about 50 mole % of 2,2'-(sulfonylbis (4,1-phenyleneoxy))-bis(ethanol) and from about 50 to about 95 mole % of a mixture of at least two diols selected from the group consisting of ethylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol, 1,4-cyclohexanedimethanol, and mixtures thereof; andthe dicarboxylic acid component comprises residues of terephthalic acid, isophthalic acid, 1,4-cyclohexandedicarboxylic acid, 2,6-naphthalene dicarboxylic acid, anhydrides thereof, acid chlorides thereof, lower alkyl esters thereof, and mixtures thereof.