PRODUCTION OF TELECHELIC POLYMER TERMINATED WITH CARBOXYL GROUP OR ITS SALT

摘要

PURPOSE:To easily obtain at low cost the title polymer having been complicated and difficult to synthesizey by synthesizing a halogen-terminated telechelic polymer through telomerization, followed by converting the terminal halogen to carboxyl group taking advantage of substitution reaction. CONSTITUTION:Firstly, in the presence of (A) a halogen compound of formula R1X1X2 (R1 is 1-6C divalent hydrocarbon; X1 and X2 are each Br or I) (pref. iodine compound such as diiodomethane) and (B) a polymerization initiator (pref. isobutylyl peroxide), 0.01-10 molar times (based on the component A) of a polymerizable monomer is polymerized into a halogen-terminated telechelic polymer. Then the terminal group(s) of this polymer is converted to carboxyl group or its salt taking advantage of substitution reaction. For this substitution reaction, e.g. reaction with a carboxyl group-contg. amine compound such as glycine is preferable.