Tonen Corporation

Toray Battery Separator Film Co., Ltd.

Tonen Chemical Corporation

Exxon Chemical Patents, Inc.

Abb Lummus Global Inc.

Lonza Societa Per Azioni

Sadakatsu Suzuki

Hiroshi Ueno

Tatsumi Ichiki

Kotaro Kimishima

Kotaro Takita

Satoshi Ueki

Hiroyuki Ozaki

Kenji Kobayashi

Hiroyuki Inagaki

Takeaki Fujii

Norimitsu Kaimai

Toshiaki Kuribayashi

Kazuhiro Yamada

Kohtaro Kimishima

Shigeaki Kobayashi

Takehisa Sato

Hironari Ueda

Tadashi Niwa

Mitsuhiro Nishida

Yoichi Matsuda

Kaori Mori

Masayuki Asami

Teiji Nakamura

Nagato Hamashima

Satoshi Asano

A method of producing microporous membranes includes stretching a multi-layer layer extrudate having first and second layers, the first layer including a first polyolefin and a first diluent, and the second layer including a second polyolefin and a second diluent, the second polyolefin including polypropylene in an amount of 1.0 wt. % to 40.0 wt. %, the polypropylene having an Mw&#x3e;0.9&#xd7;10and a &#x394;Hm&#x2267;100.0 J/g; removing at least a portion of the diluents to produce a dried membrane having a first length and a first width; stretching the membrane by a first magnification factor of 1.1 to 1.5 and stretching the membrane by a second magnification factor of 1.1 to 1.3; and reducing the width.

Methods of producing and using microporous membranes

A method for removing a process solvent (P-sol) from a polymer extrudate, especially in connection with a process for producing a microporous membrane. The method involves contacting the extrudate with chlorinated hydrocarbon (CHC) and hydrofluoroether (HFE) in a first stage; contacting the extrudate from the first stage with HFE in a second stage; combining the first and second waste streams and then separating the P-sol from the combined streams to make an HFE-CHC stream; cooling the HFE-CHC stream to make an HFE-rich phase and a CHC-rich phase; and conducting the CHC-rich phase and/or the HFE-rich phase to step (A).

Method for removing diluent from a polymer extrudate, and its applications

The invention relates to a method for removing diluent from a polymer extrudate, especially in connection with a process for producing a microporous membrane. The method involves contacting the extrudate with a second solvent in a first stage; contacting the extrudate from the first stage with a third solvent in a second stage; conducting a first stream away from the first stage and/or conducting a second stream away from the second stage; and cooling at least a portion of the first and/or second stream and separating therefrom at least one of a first phase rich in the second solvent or a second phase rich in the third solvent.

Method for removing diluent from an extrudate of a polymer solution

A method for producing a thermoplastic resin micro-porous film wherein a thermoplastic resin and a solvent (A) are melted and kneaded together to prepare a solution, the solution is extruded and cooled to prepare a formed product in a gel state, and the residual solvent (A) is removed from the formed product, characterized in that in the step of removing the solvent (A) use is made of a non-aqueous solvent (B) which is compatible with the solvent (A) and not compatible with the thermoplastic resin, and has a boiling point of 100&#xb0; or higher and a flashing point of 0&#xb0; or higher. The use of the non-aqueous solvent (B) provides a production method which allows the removal of a solvent with good efficiency and also with the reduction of a fear of environmental pollution and catching fire.

Method for producing microporous thermoplastic resin membrane

A microporous composite membrane comprising a microporous polyolefin membrane and a polypropylene-based coating layer formed on at least one surface of the microporous polyolefin membrane, the polypropylene having a mass-average molecular weight within a range of 5,000-500,000, and solubility of 0.5 g or more in 100 g of toluene at a temperature of 25&#xb0; C., and the microporous composite membrane having air permeability (converted to the value at 25-&#x3bc;m thickness) of 50-10,000 seconds/100 cc.

Microporous composite membrane and its producing method and use

Process for the regeneration of a catalyst

A lubricant and combination lubricant and refrigerant composition for use in a refrigerating machine in which a substitute freon refrigerant, which lubricant contains a polymer of a fumaric ester or a fumaric ester and a copolymerizable alkylene, and optionally contains an organic carboxylic ester or a polyalkylene glycol with a kinematic viscosity of 2 to 30 cSt. The lubricant is compatible with substitute freon refrigerants such as hydrogen-containing halogenated hydrocarbons, particularly R 134a, in a wide temperature range, has a high viscosity index, is thermally and chemically stable, and has an excellent lubricity.

Lubricant and combination lubricant and refrigerant composition

A process to prepare a high molecular weight aliphatic polyester is disclosed, where a catalyst is portionwise added, and a radical scavenger is also added. The aliphatic polyester obtained has a number average molecular weight larger than 70,000.

Aliphatic polyester and a process for the preparation thereof

There is disclosed a process for the production of 1,4-butanediol and tetrahydrofuran by the catalytic hydrogenation in the gas phase of .gamma.-butyrolactone using a solid catalyst comprising copper and silicon, copper, chromium, and manganese or copper, chromium, manganese and barium.

Process for producing 1,4-butanediol and tetrahydrofuran

Gamma-butyrolactone is prepared by catalytic dehydrogenation of 1,4-butanediol in a gaseous phase in the presence of a catalyst comprising copper, chromium, and manganese and/or barium. Improvement is in that the catalyst further contains sodium and/or potassium, whereby formation of by-products is suppressed and high yield, high selectivity and prolonged catalyst life are attained.

Process for the preparation of gamma-butyrolactone

A process of producing 1,4-butanediol by catalytically hydrogenating maleic acid anhydride and/or succinic acid anhydride in a gas phase and in the presence of a catalyst.

Process for producing 1,4-butanediol

A process of producing 1,4-butanediol and tetrahydrofuran by catalytically hydrogenating maleic acid anhydride and/or succinic acid anhydride in a gas phase and in the presence of a catalyst.

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Saitama, Japan

Sadakatsu Suzuki