Patent ID: 6645619
Filing Date: 2003-11-11
Classification: C08G,D01F,Y10T

Abstract:
A poly(trimethylene terephthalate) copolymer characterized in that it satisfies the following conditions (1) to (4):(1) ester-forming sulfonate in a range from 0.5 to 5 mol % is copolymerized relative to a total dicarbonic acid component; (2) bis (3-hydroxypropyl) ether in a range from 0.1 to 2.5 wt % is copolymerized; (3) an intrinsic viscosity is in a range from 0.65 to 1.5 dl/g, and (4) an amount of terminal carboxyl groups is 25 milli-equivalent per kg resin or less.