Nippon Shokubai Co., Ltd.

Toppan Printing Co., Ltd.

Komatsulite Mfg. Co., Ltd.

Nobuyuki Ando

Hayato Ikeda

Mitsuo Kushino

Yoshikuni Mori

Yoshinobu Asako

Nobuaki Urashima

Akira Tamura

Tatsuhito Matsuda

Takao Taguchi

Junichi Nakamura

Shigefumi Kuramoto

Yasunori Tsujino

Yasuhiro Sakai

Yasuhiro Shima

Hironobu Toribuchi

Kazuhiro Anan

Yukihiro Kasano

Keiichi Uehara

Masafumi Yamashita

Yoshihiro Miyawaki

Yuji Muraoka

An imaging lens unit configured for processing by a solder reflow process, and includes a lens group of one or more lenses; and a lens tube supporting the lens group. The imaging lens unit comprises one or more cationically-cured epoxy resin lenses formed from an cationically-curable epoxy resin material, the lens tube is formed from a thermoplastic resin material having a deflection temperature under load of at least 200&#xb0; C. The imaging lens unit has a clearance between the lens tube and at least one of the cationically-cured epoxy resin lenses and has lens supporting portions provided at least three locations inside the lens tube that support the at least one cationically-cured epoxy resin lens. The lens unit can be miniaturized. The imaging lens unit also provides excellent optical characteristics without deteriorating the optical characteristics in alignment of the centers of the lens and the diaphragm.

Imaging lens unit

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

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

Black photosensitive resin composition, color filter made by using the

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Tenri, Japan

Nobuyuki Ando