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AssigneeJapan Science and Technology Agency
InventorsYukio Nagasaki, Kazunori Kataoka, Ryosuke Kodaka
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This invention provides a finely particulate composite wherein a fine particle of block copolymer having a poly(ethyleneglycol) chain segment and a poly(meth)acrylate ester chain segment containing, on its side chain, a tertiary amino group and/or a secondary amino group has, encapsulated therein, a carbon compound, e.g., fullerene or carbon nanotube which may contains, encapsulated therein, a metal. This composite is water-soluble, and is usable as an active oxygen scavenger. This composite, when it has a metal encapsulated therein, is usable as a contrast medium.
A finely particulate composite comprising a carbon compound of closed-shell structure which essentially consists of 30 to 2000 carbon atoms and a block copolymer, wherein said carbon compound is covered with polymer chains of the block copolymer and is encapsulated in a polymer micelle which is originated in the block copolymer having a polymer chain segment containing a recurring unit which has, on its side chain, a tertiary amino group and/or a secondary amino group and a poly(ethyleneglycol) chain segment, and which has the former segment as a core and the latter segment as a shell.
A finely particulate composite comprising a carbon compound of closed-shell structure which essentially consists of 30 to 2000 carbon atoms and a block copolymer, wherein said carbon compound is covered with polymer chains of the block copolymer and is encapsulated in a polymer micelle which is originated in the block copolymer having a polymer chain segment containing a recurring unit which has, on its side chain, a tertiary amino group and/or a secondary amino group and a poly(ethyleneglycol) chain segment, and which has the former segment as a core and the latter segment as a shell, and wherein an ultrafine particle of metal either in the form of metal element or in the form of its ion is encapsulated in the closed-shell structure of said carbon compound.
Dependencies are inferred from the claim text.