| 摘要 |
PROBLEM TO BE SOLVED: To obtain an easily producible vinyl polymer having high stability, exhibiting a narrow molecular weight distribution and useful as a component of a curable composition, etc., by bonding a specific functional group to a terminal of main chain through a carbon-carbon bond. SOLUTION: The objective vinyl polymer [e.g. a (meth)acrylate polymer or an acrylic acid ester polymer having a number-average molecular weight (Mn) of 500-100,000 and an Mw/Mn ratio (Mw is weight-average molecular weight) of <1.8] has a group of formula I [R3 is OH, amino, epoxy, carboxylic acid group, group of formula II (R4 is H or methyl) or the like; R1 is a bivalent 1-20C hydrocarbon group or a group of formula III (R5 is O, a 1-20C organic group or the like; R6 is R4); R2 is R4; X is a halogen, nitroxide group, sulfide group or cobalt porphyrin complex] introduced to the molecular chain terminal of the polymer.
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