LACTONE POLYMER OF NARROW MOLECULAR WEIGHT DISTRIBUTION AND ITS PRODUCTION

摘要

PURPOSE:To obtain a lactone polymer of a narrow MW distribution by polymerizing a lactone through ring opening in the presence of a stannous halide. CONSTITUTION:A lactone (A) (e.g., epsilon-caprolactone) is polymerized through ring opening at 100-230 deg.C in the presence of 0.1-50ppm, based on component A, of a stannous halide (B) (e.g., SnCl2) as a catalyst to obtain the title polymer of a weight-average MW/number-average MW of 1.1-2.0 and an MW of 500-5000.