Mitsubishi Gas Chemical Company, Inc.

Takeda Chemical Industries, Inc.

Nec Infrontia Corporation

Makoto Mizutani

Akitoshi Sugio

Goro Shimaoka

Kazuhiko Ishii

Tatsuo Fujii

Satoshi Nagai

Junji Oshima

Toshikazu Umemura

Mutsuhiko Takeda

Shinji Tachibana

Mitsuhiko Masumoto

Toshiaki Asoh

Kunitoshi Mimura

Takeo Suzumori

Isamu Mio

Tatsuhide Hosomi

Yoshiharu Ohtsuki

Toshiaki Aso

Minoru Inada

A telephone exchange system includes a connection interface connecting a communication line and a plurality of extension telephones, a database having a dial-in conversion table registering a received number in association with a number after conversion for a dial-in incoming call, and an extension number table registering an extension telephone in association with an extension number of the extension telephone, and a main controller connected to the connection interface and the database. When the dial-in incoming call comes from the communication line, the main controller retrieves an extension number which coincides with the received number from the extension number table. When there is an extension number which coincides with the received number, the main controller causes an extension telephone corresponding to the extension number to ring.

Telephone exchange system, dial-in incoming call method thereof, and dial-in incoming call program thereof

A process for purifying a polycarbonate resin solution which comprises passing a water-in-oil dispersion type (W/O) emulsion composed of a mixture of an organic solvent solution containing a polycarbonate resin with a aqueous solution and having water particles with an average diameter of 1 to 100 &mgr;m in an oil through a metallic filter having a filtering precision of 10 to 200 &mgr;m, and then, settling the mixture for 1 to 30 minutes to perform separation between the organic solvent solution containing a polycarbonate resin and the aqueous solution containing contaminations.

Process for purifying polycarbonate resin solution

A multi-layered polymer having (a) a core layer of an aromatic vinyl polymer, (b) an intermediate layer of a butadienic rubbery polymer and (c) an outer layer of an aromatic vinyl glassy polymer, the amount of the components (a), (b) and (c) being 12 to 42 weight %, 48 to 78 weight % and 10 to 40 weight %, respectively, provides a thermoplastic resin composition excellent not only in impact strength, especially in impact strength at low temperatures, but also in, in the case of containing a coloring agent, color-stability including less mottlings, and giving a molded article improved in preventing occurrence of delamination around the gate region.

Multi-layered polymers

A polycarbonate resin composition comprising (a) an aromatic polycarbonate resin, (b) a rubber-polyester block copolymer comprising an aliphatic diene-based rubber having at one or both ends thereof a polyester structural unit formed by ring-opening polymerization of an aliphatic lactone with the aliphatic diene-based rubber, and (c) an inorganic filler.

Polycarbonate resin composition

A fiber-reinforced resin composition having surface smoothness, which comprises

Fiber-reinforced resin composition having surface smoothness

A polycarbonate resin composition for radiation sterilization, comprising an aromatic polycarbonate resin having structural units derived from a halogenated bisphenol, and a polyalkylene compound selected from poly(alkylene glycol), its ether, silyl ether or ester. Molded articles produced from the composition do not substantially undergo yellowing when exposed to radiation in air or under a substantially oxygen-free atmosphere, and can be advantageously employed in medical appliances.

Polycarbonate resin composition for radiation sterilization

A process for stabilizing trioxane, characterized by adding thereto a specific trivalent organic phosphorus compound is disclosed.

Process for stabilizing trioxane

A process for preparing oxymethylene polymers which comprises polymerizing trioxane or both trioxane and a specific cyclic ether in the presence of a catalytic amount of a boron fluoride-type catalyst, stopping the polymerization, and then subjecting the resulting polymer to a terminal stabilizing treatment, wherein the polymerization is stopped by adding a specific trivalent organic phosphorus compound and then the terminal stabilizing treatment is performed without removing the catalyst from the polymer.

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Kanagawa, Japan

Makoto Mizutani