Hodogaya Chemical Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Fuji Photo Film Company, Limited

Hogohaya Chemical Co., Ltd.

Katsuichi Motohashi

Yoshihide Miyazawa

Yuji Takashima

Masahiko Yamaguchi

Eisuke Ishida

Nobuo Suzuki

Takayuki Sakai

Kazuo Kaneko

Michihiro Gonda

Hiroyoshi Yamaga

Minoru Ozutsumi

Isao Niimura

Katsumasa Kikkawa

Noboru Akuzawa

Akio Watanabe

Hisanori Nishiguchi

Toshio Obara

Genpei Sugiyama

Takeo Kurahashi

Wakasugi Kazuyuki

Masatake Kiritani

A novel cycloalkene compound represented by the following general formula [1]: ##STR1## wherein each of R.sup.1 and R.sup.2 is a C.sub.1 -C.sub.4 alkyl group, R.sup.3 is a hydrogen atom , or a C.sub.1 -C.sub.4 alkyl group, R.sup.4, together with R.sup.5, forms --CH.sub.2 --CH.sub.2 --or --CH.sub.2 --CH.sub.2 --CH.sub.2 --, and R.sup.6 is a C.sub.1 -C.sub.4 alkyl group.

Cycloalkene compounds useful in recording materials

An electrophotographic toner capable of being electrified negatively comprising:

Electrophotographic toner containing metal complex

A symmetric 2:1 metal complex represented by the general formula: ##STR1## where R is a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an alkoxycarbonyl group having from 2 to 5 carbon atoms, an acyl group having from 2 to 5 carbon atoms, an aminocarbonyl group, an alklyaminocarbonyl group having from 2 to 5 carbon atoms, an alkylsulfonyl group having from 1 to 3 carbon atoms, an aminosulfonyl group, an acylamino group having from 2 to 5 carbon atoms, a nitro group, a cyano group or a halogen atom, m is an integer of from 1 to 4, when m is 2 or more, the plurality of R may be the same or different substituents, Q is --NHCO--Y--Z or --CONH--Y--Z (where Y is an alkylene group having from 1 to 4 carbon atoms, and Z is a quaternary ammonium group), M is a chromium atom or a cobalt atom, and X.sup..crclbar. is an anion.

Azo moiety containing metal complexes in toners

A heat sensitive record sheet comprises a coated layer comprising 2-(2-chlorophenyl)amino-6-di-propyl- or butyl-aminofluoran derivative.

Heat sensitive record sheet

Disclosed is a light transmission particle containing a colorless sublimable dye, an acyl leucophenoxazine compound suitable for use in the formation of a color image. This particle can produce a clear color image having little fogging and having an excellent resolving power.

Light transmission particle for forming color image

Disclosed is a light transmitting particle containing a sublimable color-former that is a pyridine derivative suitable for use in the formation of a color image. This particle can produce a clear color image having little fogging and having an excellent resolving power.

Light transmitting particle for forming color image

A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one fluoran compound represented by the formula; ##STR1## WHEREIN R.sub.1, R.sub.2, Z, m and ##STR2## are as defined hereinafter, is disclosed.

Fluoran compounds

Growing community of inventors

Urawa, Japan

Katsuichi Motohashi