Nippon Shokubai Co., Ltd.

Nippon Shokubai Kagaku Kogyo Co., Ltd.

Osaka University

Nippon Shokubai Kagaku Kogyo Kabushiki Kaisha

Toppan Printing Co., Ltd.

Hayato Ikeda

Nobuaki Urashima

Mitsuo Kushino

Yoshikuni Mori

Yoshinori Sano

Kenji Minami

Masuji Izubayashi

Nobuyuki Ando

Keiichi Uehara

Yoshinobu Asako

Yoshihiro Arita

Kiyoshi Kawamura

Eku Shimosegawa

Tadashi Watabe

Yoshifumi Shirakami

Jun Hatazawa

Kazuko Kaneda

Shigeru Tanimori

Yasukazu Kanai

Tomoyuki Kuwamoto

Akira Tamura

Tatsuhito Matsuda

Takao Taguchi

Shigefumi Kuramoto

Minoru Aoki

Yasuhiro Sakai

Kazuhiro Anan

Yasuhiro Shima

Akihiko Fukada

Minoru Kobayashi

Hironobu Toribuchi

Iwao Fujikawa

Tsuyoshi Yamashita

Iwao Fukikawa

The invention relates to a method of producing the radiolabeled aryl compound (I) Ar—X, or a salt thereof, wherein X isAt,At,I,I,I, orI. The method involves reacting the aryl boronic acid compound (II) Ar—Y, or a salt thereof, wherein Y is a borono group (—B(OH)) or an ester group thereof, with a radionuclide selected fromAt,At,I,I,I andI, in the presence of an oxidizing agent selected from an alkali metal iodide, an alkali metal bromide, N-bromosuccinimide, N-chlorosuccinimide and hydrogen peroxide, in water.

Production method for radiolabeled aryl compound

The invention relates to a method of producing the radiolabeled aryl compound (I) Ar&#x2014;X, or a salt thereof, wherein X isAt,At,I,I,I, orI. The method involves reacting the aryl boronic acid compound (II) Ar&#x2014;Y, or a salt thereof, wherein Y is a borono group (&#x2014;B(OH)) or an ester group thereof, with a radionuclide selected fromAt,At,I,I,I andI, in the presence of an oxidizing agent selected from an alkali metal iodide, an alkali metal bromide, N-bromosuccinimide, N-chlorosuccinimide and hydrogen peroxide, in water.

An inorganic dispersion stabilizer having a hydrophobic inorganic oxide such as hydrophobic silica dispersed in an aqueous medium in the presence of an hydrophilic organic compound such as alcohol. An suspension polymerization process for producing resinous particles of a narrow particle diameter distribution by dispersing a monomer into an dispersion medium in the presence of the inorganic dispersion stabilizer, and polymerizing the monomer.

Inorganic dispersion stabilizer and process for producing resinous particles using the same

The present invention provides: a fine particles-dispersed composition that has extremely good dispersibility even if a polyamidic acid is contained in the composition; and a production process for such a composition. The polyamidic acid-containing and fine particles-dispersed composition comprises fine particles and a polar solvent solution, wherein the fine particles are dispersed in the polar solvent solution using an organic polymer as a dispersant, and this composition further comprises a polyamidic acid.

Polyamidic acid-containing and fine particles-dispersed composition and production process therefor

Carbon black graft polymer which comprises carbon black and a polymer chain grafted thereto, the carbon black having a specific surface area of not more than 120 m /g.

Carbon black graft polymer

An electrostatic image developer which has an improved charge retaining ratio is disclosed. The developer comprises toner particles comprising (a) a binding resin and (b) a coloring agent and having a mean particle diameter of not more than 25 &mgr;m, and (c) organic-inorganic composite particles attached or fixed to the surface or the proximity of surface of said toner particles. The composite particle contains an organic polymer framework and a polysiloxane framework, the polysiloxane framework having in the molecule thereof an organosilicon which has a silicon atom to which at least one carbon atom in said organic polymer framework combined directly, the organic-inorganic composite particles having SiO,as a component of said polysiloxane framework at a content in the range of 10 to 90% by weight. The composite particles have a mean particle diameter in the range of 0.01 to 5 &mgr;m. The mixing ratio of (b) the coloring agent to (a) the binding resin in the toner particles in 20 to 2 parts by weight of (b) to 80 to 98 parts by weight of (a), as the total amount of (a) and (b) is 100 parts. The mixing ratio of the organic-inorganic composite particles to the toner particles is 0.01 to 20 parts by weight of the composite particles to 100 parts by weight of the toner particles.

Developer for electrostatic image

For example, a blended composition is produced first by letting a monomer composition, mainly composed of alkyl (meth)acrylate and including a compound having a plurality of polymeric groups within a molecule, contain microscopic particles, such as carbon black, having an average primary particle size in a range between 1 nm and 200 nm, and then the blended composition is polymerized. Consequently, it has become possible to produce inexpensive crosslinked elastomer having excellent physical properties, such as small creep (low creep) in compression set, tensile elongation set, etc., and excellent mechanical strength, such as tensile break strength and tensile break elongation, in a simple procedure omitting the post-crosslinking step at a high-level productivity while saving energy and time spent in the kneading step.

Crosslinked elastomer and producing process thereof

Carbon black graft polymer, method for production thereof, and use

Black photosensitive resin composition, color filter made by using the

A suspension polymerization of a polymerizable monomer in the presence of an emulsion polymerization inhibitor is disclosed. The inhibitor is an aromatic series compound having a NO.sub.2 group, a SO.sub.3 Na group, and a secondary amino group, representatively, the following compound. In this suspension polymerization, the production of by-produced microfine particles caused by the emulsion polymerization as the secondary polymerization scheme is repressed. ##STR1##

Emulsion polymerization inhibitor and suspension polymerization method

Coloring fine particles produced by heating spheroidal coloring fine particles with an average fine particle diameter of 1-100 .mu.m obtained by suspension polymerization to a temperature of 30.degree. to 200.degree. C., thereby causing the particles to fuse together in a block without completely destroying the particle interfaces, and then crushing the block to substantially the same average particle diameter of the spheroidal coloring particles before melting, and a toner for developing electrostatic images using the same.

Coloring fine particles and toner for developing electrostatic images

Coloring fine particles produced by heating spheroidal coloring fine particles with an average fine particle diameter of 1-100 .mu.m obtained by suspension polymerization to a temperature of 30.degree. to 200.degree. C., thereby causing the particles to fuse together in a block without completely destroying the particle interfaces, and then crushing the block to substantially the same average particle diameter of the spheroidal coloring particle before melting, and a toner for developing electrostatic images using the same.

Coloring fine particle and toner for developing electrostatic images

Colored microfine globular particles are produced by causing carbon black to react with a polymer capable of reacting with the carbon black thereby forming a carbon black-graft polymer, dispersing this carbon black-graft polymer in a polymerizable monomer component, and then polymerizing the polymerizable monomer component. These particles, in the unmodified form, are usable as a toner for the development of images of static charge and, in a form incorporated in a varying component, are usable such as in resin composition, coating composition, thermosensitive transfer ink ribbon coating agent, thermosensitive transfer ink, or back-coating agent for magnetic recording medium.

Colored microfine globular particles, method for production thereof, and

A carbon black-graft polymer, produced by causing a polymer possessing within the molecular unit thereof at least one reactive group selected from the class consisting of aziridine group, oxazoline group. N-hydroxyalkylamide group, epoxy group, and thioepoxy group to react with carbon balck. The polymer can be used as a toner for electrostatically charged image, resin composition, coating composition, ink for thermographic transer, coating gent for magnetic recording medium, rubber composition, and carbon black dispersion and the like.

Carbon black-graft polymer, method for production thereof, and use

Colored microfine globular particles, method for production thereof and

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Nara, Japan

Hayato Ikeda