Hodogaya Chemical Co., Ltd.

Mochida Seiyaku Kabushiki Kaisha

Katsura Sangyo Co., Ltd.

Koichi Kashima

Toyohiko Yamaguchi

Hiroshi Hamada

Hajime Yamazaki

Makoto Nagaoka

Minoru Ozutsumi

Nobuo Kaifu

Shinji Otani

Susumu Jinbo

Shoichi Kohno

Masaru Morinaga

Kiyokazu Takasou

Disclosed is a process for preparing a particulate toner for developing an electrostatic image, which comprises suspending a polymerizable monomer composition comprising a polymerizable monomer, a resin dissolved therein, and a coloring agent in an aqueous medium not containing a dispersant to prepare a pre-suspension, jetting the pre-suspension through a nozzle under elevated pressure in a flowing direction which is forced to vary so that the pre-suspension collides with a predetermined plane or with each other, and then immediately passing the pre-suspension through an apparatus for throttling the path to produce back pressure and shearing stress to prepare a suspension containing a particulate polymerizable monomer and subjecting the resulting suspension to polymerization. The toner prepared by the process is a high performance toner which is free of finely divided grains and emulsion, exhibits a high chargeability, a uniform chargeability distribution, an excellent environmental stability and a high definition, and is insusceptibie to fogging and unevenness.

Toner for the development of electrostatic image and process for the

A sulfur-containing polymer having a repeating unit represented by the formula: ##STR1## where R is a straight or branched alkylene group having from 1 to 6 carbon atoms, R' is a straight or branched alkylene group having from 1 to 3 carbon atoms and p is an integer of from 0 to 10, and having an average molecular weight of from 500 to 10,000 and a sulfur content of from 15 to 65% by weight. The sulfur-containing polymer of the present invention is useful as a flame or smoke retarding agent in resin and rubber materials.

Sulfur-containing polyester and process for its production

4-oximino-1,2,3,4-tetrahydroquinoline derivatives of the formula (I): ##STR1## wherein X represents a halogen atom and Y represents a hydrogen atom, a straight-chain or branched-chain alkyl group, a halogen-substituted lower alkyl group, a phenylalkyl group, a phenylalkenyl group, an unsubstituted or halogen-substituted phenyl group, a nitrogen-containing aromatic group, a straight-chain or branched-chain alkoxy group or an alkyl-substituted or phenyl-substituted amino group.

4-Oximino-1,2,3,4-tetrahydroquinoline derivatives

A process for preparing a resorcinol copolymer, comprising at least one specific phenol with formaldehyde at a certain mole ratio to obtain a resol-type precondensate containing 1 to 30% of residual unreacted formaldehyde and then adding said resol-type precondensate to a mixture of an acid catalyst and at least one resorcinol to effect co-condensation. The obtained copolymer is useful for an adhesive for polyester fiber and rubber.

Process for preparing resorcinol copolymers

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Tokyo, Japan

Koichi Kashima