| 摘要 |
The present invention provides a process for producing a vinyl polymer characterized in that, in a radical polymerization of a vinyl monomer, a substituted hydroxylamine represented by a general formula:in which R1 and R2 represent hydrogen, a (substituted) aliphatic hydrocarbon group having one or more carbon atom(s) or an aromatic hydrocarbon group) and/or general formula:(in which R3 and R4 represent a (substituted) aliphatic hydrocarbon group having one or more carbon atom(s) is added. A radically polymerized vinyl polymer having a high molecular weight and a restrained molecular weight distribution can be obtained by the process of the present invention, even under a polymerization condition at a high temperature. The present invention provides, therefore, a process enabling to produce vinyl polymers which promise to have practical properties such as appearance, mechanical properties and heat resistance useful as materials for various moldings and coatings. Thus, the industrial and technical value of the present invention is extremely high.
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