Living radical polymerization method using a phosphorus compound or nitrogen compound as a catalyst

摘要

A highly active and environment-friendly catalyst for use in a living radical polymerization is provided. A catalyst for use in a living radical polymerization method is provided. The catalyst comprises a central element, which is selected from nitrogen and phosphorus, and at least one halogen atom, which is bound to the central element. A monomer having a radical reactive unsaturated bond is subjected to a radical polymerization reaction in the presence of the catalyst, thereby it is possible to obtain a polymer having narrow molecular weight distribution. The present invention has the merits such as low toxicity of the catalyst, a small amount of the catalyst being required, high solubility of the catalyst in the polymerization media, mild reaction conditions, no coloration, no odor (unnecessary post-treatment of molded products). The method of the present invention is more environment-friendly and economical than other living radical polymerization methods.

主权项

1. A method of polymerization comprising a step of conducting a living radical polymerization reaction, wherein the living radical polymerization step is conducted in the presence of:
a) a catalyst consisting of a compound comprising at least one central element selected from nitrogen and phosphorus, and at least one halogen atom which is bound to the central element, wherein the halogen atom is iodine or bromine; and b) an organic halide having a carbon-halogen bond; wherein, the only catalyst for living radical polymerization is the catalyst of a).