Patent ID: 6448367
Filing Date: 2002-09-10
Classification: C08G,D01F,Y10T

Abstract:
A method of producing poly(p-dioxanone) by the ring opening polymerization of p-dioxanone in the presence of a catalyst and an initiator, which comprises the steps of starting the ring opening polymerization of p-dioxanone in a liquid phase under stirring at a temperature of 85 to 105Â° C. after adding 0.002 to 0.005 mol percent of stannous 2-ethylhexanoate forming a white crystal at a temperature of 0Â° C. as the catalyst and 0.01 to 0.1 mol percent of initiator thereto, and stopping stirring when a stirring load has increased by 10 to 100 percent over an initial load, while lowering the temperature to a range of 65 to 85Â° C. , to continue the polymerization in a solid phase.