The purpose of the present invention is to provide polymerization catalyst which can produce quite efficiently (co)polymer having number average molecular weight and number of molecules which are accurately controlled in producing method of (co)polymer by the polymerization of polar unsaturated compound, and provide living polymerized (co)polymer obtained according to the producing method. For the purpose, polymerization catalyst composition which comprises the composition comprising organic oxysalt compound and hydroxycarbonyl compound having at least both an alcoholic hydroxyl group and a carbonyl group in the same molecule is provided and the polar unsaturated compound is polymerized by using the polymerization catalyst composition. The composition containing the obtained (co)polymer were able to provide thermosetting powder coating composition having particularly excellent characteristics.
本发明的目的是提供一种聚合催化剂,该催化剂可在通过极性不饱和化合物聚合生产 (共)聚合物的方法中相当有效地生产具有精确控制的平均分子量数和分子数的(共)聚合 物,并提供根据该生产方法获得的活聚合(共)聚合物。为此,提供了聚合催化剂组合物,该组合物由有机
草酸盐化合物和羟基羰基化合物组成,羟基羰基化合物在同一分子中至少具有醇羟基和羰基,使用该聚合催化剂组合物对极性不饱和化合物进行聚合。含有所获得的(共)聚合物的组合物能够提供具有特别优异特性的热固性粉末涂料组合物。