Patent ID: 8987408
Filing Date: 2015-03-24
Classification: C08G

Abstract:
1. Finished polyester polymer particles obtained by a process comprising polycondensing a molten polyester polymer composition to an It.V. of at least 0.68dL/g; then adding at least one antimony catalyst stabilizer or deactivator comprising an acidic phosphorous compound to the polymer melt; and then solidifying the polymer melt into solid polyester polymer particles, and having: a degree of crystallinity of at least 20%, antimony atoms, phosphorus atoms, an acetaldehyde generation rate of less than 20 ppm, as measured at 295° C. for 5 minutes, lacking organic acetaldehyde scavengers, and which have not been solid state polymerized, wherein the molar ratio of phosphorus atoms to antimony atoms, P:Sb, is at least 1:1.