Idemitsu Kosan Company, Limited

Haruo Shikuma

Shuji Machida

Shinichi Kurokawa

Toshinori Tazaki

Motoharu Ishikawa

Yutaka Takakura

Ayami Hoshino

Nobuhiro Yabunouchi

Hiroyuki Tamura

Takaaki Hikosaka

Noriyuki Tani

Mizutomo Takeuchi

Tomio Tatsumi

Kouichi Matono

Yasunori Kadoi

Kenji Nakacho

Nobuo Kawasaki

An ethylenic copolymer composition including an ethylenic copolymer having Mw/Mn of 1.5 to 4, Mw of 3,000 to 1,000,000, and a resin density of 0.85 to 0.95 g/cm. The relationship between the half width at the half maximum [W/2] of the Gaussian distribution curve, and the average, n, of short-chain branches in the copolymer satisfies the equation,0.704+0.147n=W/2=&#x2212;0.055+0.577n.The ethylenic copolymer composition also includes an ethylenic copolymer having an Mw of 3,000 to 1,000,000 and a resin density of 0.85 to 0.95 g/cm.

Ethylenic copolymer, composition containing said copolymer, and ethylenic copolymer film

The invention is &lsqb;1&rsqb; a resin composition comprising a resin obtained by polymerizing cyclopentadiene or the like and a specific styrene resin, &lsqb;2&rsqb; a resin composition comprising (a) a polystyrene-type polymer component and (b) a specific petroleum resin-based polymer component, and &lsqb;3&rsqb; a toner binder resin for development of an electrostatically charged image comprising (A) a terpene resin or the like and (B) a styrene resin and/or a polyester resin. Further, it is a toner binder resin for development of an electrostatically charged image containing these resin compositions as a main component, and a toner for development of an electrostatically charged image comprising the toner binder resin and a coloring material.

Resin composition, binder resin for toner and toner

Polyethylenes are disclosed herein which are derived from an ethylene monomer and in which any quaternary carbon atom is not present in a polymeric main chain; and the activation energy (Ea) of melt flow is in the range of 8 to 20 kcal/mol; as well as

Polyethylene, thermoplastic resin composition containing same, and

Ethylene copolymer, thermoplastic resin composition containing same, and

Process for preparing olefin polymer, and ethylenic polymer

Olefin copolymer and process for preparing same

Growing community of inventors

Sodegaura, Japan

Haruo Shikuma