Patent ID: 8580916
Filing Date: 2013-11-12
Classification: C08G,C08L

Abstract:
1. A method for providing a stable solution of polymer prepared from an N,O-heterocyclic compound, comprising: (a) dissolving an N,O-heterocyclic compound of formula I or formula II into a first solvent to form a first reaction solution: wherein, R1 to R3 are independently selected from the group consisting of H, a halogen, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C1-C10 cycloalkyl group, and a substituted or unsubstituted C6-C20 aryl group; W1 and W2 are independently selected from the group consisting of H, a halogen, an ether group, a thioether group, a sulfonyl group, a sulfinyl group, a carbonyl group, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C1-C10 cycloalkyl group and a substituted or unsubstituted C6-C20 aryl group; m and n are independently an integer ranging from 1 to 4; p is an integer ranging from 1 to 3; and q is an integer ranging from 1 to 4; (b) heating the first reaction solution to a first temperature to carry out a ring-opening polymerization; and (c) cooling the first reaction solution to a second temperature to substantially terminate the ring-opening polymerization by adding a second solvent into the first reaction solution, wherein the temperatures of the second solvent is lower than the second temperature and the second solvent is unreactive to the polymer, wherein, the first solvent is unreactive to the N,O-heterocyclic compound; the first temperature is higher than the softening point of the N,O-heterocyclic compound and lower than the boiling point of the first solvent; and the second temperature is lower than the first temperature.