Nissan Chemical Industries Limited

Kyushu University

Nissan Chemical Corporation

Gunma University

Keisuke Kojima

Hideo Nagashima

Keisuke Odoi

Daigo Saito

Akihiro Tanaka

Takashi Sue

Osamu Uesugi

Nobuyoshi Nakagawa

Takuya Tsujiguchi

Misaki Kojima

Takanori Iwakami

Yudai Morimoto

A complex that includes a metal fine particle dispersant including a branched polymer compound having an ammonium group and having a weight average molecular weight of 500 to 5,000,000; and a metal fine particle, wherein the metal fine particle includes platinum (Pt) or palladium (Pd), the metal fine particle dispersant includes a branched polymer compound of Formula (1): 

Metal fine particle dispersant containing branched polymer compound having ammonium group

There is provided a metal fine particle association suitably applied to an electrode catalyst to achieve even higher output leading to reduction in amount of the catalyst used, and a process for producing the same, that is, a metal fine particle association including a plurality of metal fine particles that have a mean particle diameter of 1 nm to 10 nm and are associated to form a single assembly, an association mixture including the metal fine particle association and a conductive support; a premix for forming an association, including metal fine particles, a metal fine particle dispersant made of a hyperbranched polymer, and a conductive support; and a method for producing the association mixture.

Metal fine particle association and method for producing the same

There is provided a novel, environmentally friendly primer for use in the pretreatment steps in electroless plating, which can be easily used in fewer steps with a lower cost. A primer for forming a metallic plating film on a substrate by electroless plating, the primer including: a hyperbranched polymer having an ammonium group at a molecular terminal and a weight-average molecular weight of 500 to 5,000,000; and a metal fine particle.

Primer for electroless plating comprising hyperbranched polymer and metal fine particles

There is provided a novel production method of a chlorinated hyperbranched polymer that is optically stable and is capable of derivatizing the chlorinated hyperbranched polymer into various compounds. A production method of a chlorinated hyperbranched polymer for producing a chlorinated hyperbranched polymer of Formula (1): {where X is a chlorine atom; Ris a hydrogen atom or a methyl group; and Ais a phenylene-alkylene group, n is the number of repeating unit structures and is an integer of 2 to 100,000}, comprising the step of substituting a dithiocarbamate group of a hyperbranched polymer of Formula (3): (where R, A, and n are the same as defined in Formula (1); and each of Rand Ris a Calkyl group, a Chydroxyalkyl group, or a Carylalkyl group, or Rand Roptionally form a ring together with a nitrogen atom bonded to Rand R) with a chlorine atom using sulfuryl chloride.

Method for producing chlorinated hyperbranched polymer

There is provided a metal fine particle dispersant containing a branched polymer compound having an ammonium group. The metal fine particle dispersant of the present invention comprises a branched polymer compound having an ammonium group and having a weight average molecular weight of 500 to 5,000,000. The metal fine particle dispersant has the structure of Formula (1): The present invention also relates to a composition comprising the metal fine particle dispersant and a metal fine particle.

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Funabashi, Japan

Keisuke Kojima