Jsr Corporation

Rion Company Ltd.

Masaru Ueno

Kouji Tamori

Tsutomu Nakajima

Mitsuhiro Murata

Tetsuo Fukuta

Eiji Takamoto

Satoshi Katayose

Kiyoshi Kasai

Yuuichi Ueya

Kazuma Sekimoto

Miyuki Fukuda

Tomohiro Uetsuhara

Yuki Oohashi

Takashi Sannomiya

The organic polymer particles comprise a carboxyl group and 2,3-dihydroxypropyl group, and the magnetic particles for diagnostics comprise fine magnetic material particles and a polymer part containing a hydrophilic polymer part and a crosslinked polymer part, a dry coating film obtained from a water dispersion thereof having a contact angle with water of 5&#xb0; to 60&#xb0;. The process for producing the carboxyl group-containing particles comprises a step of producing an ester bond by reacting a hydroxyl group in organic polymer particles having the hydroxyl group with a carboxylic anhydride. The organic polymer particles comprise a hydroxyl group originating from a 2,3-dihydroxypropyl group and a polyoxyethylene group.

Organic polymer particles and process for producing the same, magnetic particles for diagnostics, carboxyl group-containing particles and process for producing the same, and probe-bound particles and process for producing the same

A method for producing magnetic particles includes forming a hydrophobic first polymer layer on the surface of a mother particle containing superparamagnetic particles, forming a second polymer layer having glycidyl groups at least on its surface on the first polymer layer, and introducing a polar group containing one or more of at least one atom selected from the group consisting of an oxygen atom, a nitrogen atom, and a sulfur atom by chemically modifying the glycidyl groups.

Polymer-coated magnetic particles comprising a 2,3-hydroxypropyl group, and probe-bonded particles

Magnetic particles comprising a group shown by the following formula (1): wherein Rand Rindividually represent a hydroxyl group, a group shown by the following formula (2), or a group shown by the following formula (3), provided that Rand Rare not both hydrogen atoms, wherein Rrepresents an a linear, branched, or cyclic alkylene group having 2 to 6 carbon atoms or an arylene group, and wherein Ris a hydrogen atom or an alkyl group.

Magnetic particles comprising an organic polymer layer and method for producing the same

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Tsukuba, Japan

Masaru Ueno