PURPOSE: To obtain a urea-modified carbodiimide which is prepared by introducing urea bonds into the carbodiimide main chain, thus shows high compatibility with thermoplastic resins and increases the heat resistance and hydrolysis resistance of thermoplastic resins.
CONSTITUTION: This carbodiimide is represented by formula I [R is a 1-12C alkyl, a 3-10C cycloalkyl; Z is a 1-12C alkylene, a 3-10C cycloalkylene, a 4-16C alkylene having a (non)cyclic structure, an aromatic substituted 8-16C alkylene; m is 1, 2; n is 1-50]. This carbodiimide is obtained by reaction of a compound of formula II with a primary or secondary aliphatic amine to effect the introduction of the urea bond into the compound II followed by carbodiimidation reaction of the product in the presence of a catalyst such as 3-methyl-1-phenyl-2- phosphorene-1-oxide.
TAKAHASHI IKUO
HORIE TADASHI
YAMANE TAKESHI
