MOLECULAR WEIGHT CONTROLLING AGENT FOR RADICAL POLYMERIZATION, METHOD FOR PRODUCING POLYMER USING SAME, AND POLYMER
申请人:SDP Global Co., Ltd.
公开号:US20210070687A1
公开(公告)日:2021-03-11
The present invention's purpose is to provide: a molecular-weight controlling agent for radical polymerization which enables controlled radical polymerization of a water-soluble monomer in an aqueous medium; a method for producing a polymer of a water-soluble vinyl monomer using the same; and a water-soluble vinyl monomer polymer. The present invention provides a molecular-weight controlling agent for radical polymerization characterized in that the agent comprises, as its active ingredient, an iodine compound represented by formula (1) and in that the solubility of the active ingredient in water is 0.5 weight % or more at 20° C.
In the formula, R
1
is —COOX, —CONR
4
R
5
, an aromatic group or a cyano group, X is a hydrogen atom, an aliphatic group, an alkali metal, an alkaline earth metal, an organic ammonium or an ammonium, and R
2
, R
3
, R
4
and R
5
are each independently a hydrogen atom, an aromatic group or an aliphatic group.
本发明的目的是提供:一种用于自由基聚合的分子量控制剂,能够在水性介质中对水溶性单体进行受控自由基聚合;使用该分子量控制剂制备水溶性乙烯单体聚合物的方法;以及水溶性乙烯单体聚合物。本发明提供一种用于自由基聚合的分子量控制剂,其特征在于,该剂包含一种由式(1)表示的碘化合物作为其活性成分,并且该活性成分在20°C时在水中的溶解度为0.5重量%或更高。在该式中,R1为—COOX,—CONR4R5,芳香基或氰基,X为氢原子,脂肪基,碱金属,碱土金属,有机铵或铵,R2、R3、R4和R5分别为氢原子,芳香基或脂肪基。