Patent ID: 9045508
Filing Date: 2015-06-02
Classification: C07F,C08G,Y10T

Abstract:
1. A method for producing a phosphorus-containing oligomer, the method comprising mixing a compound (a1) represented by structural formula (a1-1) or (a1-2) below and a compound (a2) represented by structural formula (a2) below with each other at a molar ratio of [compound (a1)/compound (a2)]=0.01/1.0 to 0.99/1.0; causing a reaction to proceed at 80° C. to 180° C. in the presence of an acid catalyst; then adding the compound (a1) so that the total amount on a molar basis is 1.01 to 3.0 times the amount of the compound (a2) charged; and causing a reaction to proceed at 120° C. to 200° C., (in the formula, R (in the formula, R