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By novel block copolymer, and in the presence of a phosphonium salt of the sulfur anion of nitrogen, oxygen, or to execute the anionic polymerization which does not use metal, it is new for the preparation has a molecular weight distribution Mai narrow the (co) polymer how
By novel block copolymer, and in the presence of a phosphonium salt of the sulfur anion of nitrogen, oxygen, or to execute the anionic polymerization which does not use metal, it is new for the preparation has a molecular weight distribution Mai narrow the (co) polymer how
(57) in the presence of phosphonium salts of nitrogen, sulfur or anionic oxygen, by anionic polymerization using no metal, a polymer having a molecular weight distribution Mai narrow (especially [Abstract] The present invention, and (meth) acrylate polymer novel process for producing the copolymer). To form a copolymer block of at least one and a block copolymer, about how the presence of a phosphonium salt, to produce the block copolymer by causing anionic polymerization invention also.
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