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US 7,399,814 B2Granted
Living radical polymerization method
AssigneeKyoto University
InventorsAtsushi Goto, Takeshi Fukuda, Yoshinobu Tsujii
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AssigneeKyoto University
InventorsAtsushi Goto, Takeshi Fukuda, Yoshinobu Tsujii
Estimating the term…
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 germanium, tin and antimony, 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 under 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 can be used, high solubility of the catalyst, 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 a conventional living radical polymerization method.
A use of a catalyst in a living radical polymerization method, wherein the catalyst consists of a compound comprising at least one central element selected from germanium, tin or antimony, and at least one halogen atom which is bound to the central elements and wherein the method comprises a step of conducting a living radical polymerization reaction in the presence of the catalyst.
A method of conducting a living radical polymerization, comprising a step of conducting a living radical polymerization reaction of a monomer having a radically reactive unsaturated linkage, under the presence of a catalyst, wherein the catalyst consists of a compound comprising at least one central element selected from germanium, tin or antimony, and at least one halogen atom which is bound to the central element.
A living radical polymerization composition, comprising a catalyst, an organic halide having a carbon-halogen linkage and a monomer having a radically reactive unsaturated linkage, wherein the catalyst consists of a compound of the following general formula (I):
A living radical polymerization composition, comprising a catalyst, an organic halide having a carbon-halogen linkage and a monomer having a radically reactive unsaturated linkage, wherein the catalyst consists of a compound of the following general formula (I):
A living radical polymerization composition, comprising a catalyst and a monomer having a radically reactive unsaturated linkage, wherein the catalyst consists of a compound comprising at least one central element selected from germanium, tin or antimony, and at least one halogen atom which is bound to the central element, wherein the halogen atom is iodine or bromine, and wherein the composition does not comprise an episulfide compound.
Dependencies are inferred from the claim text.