Mitsubishi Gas Chemical Company, Inc.

Canon Kabushiki Kaisha

Shin-etsu Chemical Co., Ltd.

Satoshi Kanayama

Noriyoshi Ogawa

Katsumi Aoki

Shinya Mayama

Noriko Ohtani

Toshiaki Takata

Mitsuhiko Masumoto

Masaaki Yamaya

Kiyoshi Sakai

Masaki Tanaka

Teigo Sakakibara

Naoto Fujimura

Yasumasa Norisue

Akinari Itagaki

Toshikazu Umemura

Takahiro Adachi

Jun Tajima

Toshiaki Asoh

Mituhiko Masumoto

Teruo Kawahigashi

An alkali metal or alkaline earth metal salt of sulfonic acid of polyphenylene ether oligomer is useful as a modifier for thermoplastic resins, typically as a flame retardant, compatibilizing agent or antistatic agent.

Polyphenylene ether oligomer sulfonic acid salt, making method, flame retardant resin composition, and molded article

Photoreceptor for electrophotography with low free chlorine content

A polycarbonate resin solution for forming a thermal-sublimating dye-receiving layer film, comprising a random copolycarbonate resin dissolved in an organic solvent, the resin having a structural unit represented by following formula (1) and a structural formula represented by following formula (2) or (3), the molar ratio of the structural unit represented by formula (1) to the structural unit represented by formula (2) or (3) being from 35/65 to 65/35, and having a number average molecular weight of from 5,000 to 50,000. ##STR1## wherein R.sup.1 to R.sup.12 each represents a hydrogen atom, a halogen atom, or an alkyl group having from 1 to 4 carbon atoms and in formula (1), A represents a straight chain, branched, or cyclic alkylidene group having from 1 to 10 carbon atoms, an aryl-substituted alkylidene group, an arylene group, or a sulfonyl group.

Method for preparing a thermal transfer image-receiving sheet involving

A polycarbonate derived from a novel dihydroxy compound having a triphenylamine structure, and a process for producing the polycarbonate are disclosed. The polycarbonate is obtained by reacting a dihydroxy compound having a triphenylamine structure described hereinbefore and a carbonate precursor, or by reacting the dihydroxy compound, a dihydric phenol compound and the carbonate precursor. The polycarbonate is useful as a plastic molding material or as a material for forming a polymer alloy with other resin.

Polycarbonate polymer derived from dihydroxy compound having

There is disclosed an electrophotographic photosensitive member comprising a conductive support and a photosensitive layer provided thereon, wherein the photosensitive layer contains a random copolymer having a structural unit represented by the following Formula (I): ##STR1## and a structural unit represented by the following Formula (II): ##STR2##

Electrophotographic photosensitive member, and electrophotographic

The present invention provides an image-holding member which comprises an electroconductive support and a resin layer formed on the support, wherein the surface layer of the image-holding member contains a copolymer having the structure units represented by the formulas [I] and [II]: ##STR1## where A is a linear, branched or cyclic alkylidene group of 1 to 10 carbon atoms, an aryl-substituted alkylidene group, arylene-dialkylidene group, --O--, --S--, --CO--, --SO--, or --SO.sub.2 --; and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are respectively hydrogen, halogen, or an alkyl or alkenyl group of 1 to 4 carbons; ##STR2## where R.sub.5 is an alkylene or alkylidene group of 2 to 6 carbons; R.sub.6 and R.sub.7 are respectively an alkyl group of 1 to 3 carbons, a phenyl or substituted phenyl group; and n is an integer of from 1 to 200, and the copolymer containing the structure unit of the formula [II] in an amount of from 0.1 to 50% by weight Of the total weight of the copolymer.

Image-holding member, and electrophotographic apparatus, apparatus unit,

A polycarbonate resin comprising either a structural unit derived from a spiro ring-containing dihydric phenol, or such a structural unit and a structural unit derived from a dihydric phenol, and a process for producing the same. The polycarbonate resin has excellent flowability and moldability, and also improved optical properties (low refractive index, large Abbe number, etc.), and can be advantageously used in various fields, e.g., as a material for molded articles for optical use and other precision molded articles.

Polycarbonate resin from bis(hydroxy benzoyl oxy-tetra oxa spiro) cpd.

A process for producing a weather-resistant polycarbonate resin by solution polymerization, of at least one dihydric phenol and phosgene in which a compound represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3, each represents a hydrogen atom, a halogen atom, a nitro group, an alkyl group having from 1 to 20 carbon atoms, an alkoxy group having from 1 to 20 carbon atoms, or an aryl group having from 6 to 20 carbon atoms; m represents 1 or 2; and n represents an integer of from 1 to 10, is used as a terminator. The polycarbonate resin produced exhibits high weather resistance without suffering from volatilization.

Process for producing weather-resistant polycarbonate with

A process for producing a polycarbonate resin having excellent heat stability from a dihydric phenol compound represented by the formula (1) shown below by an interfacial polymerization method wherein fatty acid represented by the formula (2), (3), (4) or (5) shown below is used as a terminator and as a polymerization catalyst, a quaternary ammonium salt is used, and after 5 to 40 minutes from the addition and emulsification of the polymerization catalyst, tertiary amine is added to cause polymerization. ##STR1## wherein all the symbols are the same as defined before.

Process for producing fatty acid-terminated polycarbonate resin

Growing community of inventors

Osaka, Japan

Satoshi Kanayama