Sumitomo Chemical Company, Limited

Tadashi Shindo

Koji Higashi

Shinkichi Shimizu

Tatsuo Shiraishi

Taiichi Sakaya

Hiroshi Ichihashi

Toshiya Kuroda

Akiko Shimizu

Michitaka Morikawa

Fumiyoshi Kato

A phase retarder including a layered inorganic compound-containing sheet or layered inorganic compound-containing film, the inorganic compound being selected from the group consisting of a clay mineral, a chalcogen compound, a zirconium phosphate compound, an oxyacid salt of a transition metal, a layered polysilicate, a metal oxyhalogenide, and an intercalary decoration thereof intercalated with ions or molecules between crystalline layer units, the inorganic compound having a mean particle size of 5000 nm or less and a stratified structure with a plurality of crystalline layer units wherein the phase retarder has a refractive index in the plane of the phase retarder that is different from a refractive index in the thickness direction of the phase retarder.

Layered inorganic compound-containing phase retarder

A process for continuously producing a phase retarder film or sheet comprising continuously supplying a stretched thermoplastic resin film or sheet to a heating zone in parallel with the stretching direction of the film or sheet and heating the film or sheet to a temperature not lower than the glass transition temperature of the resin while applying pressure to the surface of the film or sheet passing through the heating zone, thereby continuously subjecting the film or sheet to thermal relaxation while suppressing the expansion of the film or sheet in a direction parallel to the surface of the film or sheet and perpendicular to the stretching axis. According to the present invention, a phase retarder film or sheet having a low angular dependence of retardation can be produced continuously. By using the phase retarder film(s) or sheet(s) thus obtained as optical compensator(s), the viewing angle characteristics of liquid crystal display devices can remarkably be improved.

Process for producing phase retarder film

A liquid crystal device with a compensator made of a layered inorganic compound sheet or film in which a refractive index in the plane and a refractive index in the thickness direction are different from each other. The layered inorganic compound may be smectite group minerals. The layered inorganic compound has a mean particle size of 500 nm or less. The phase retarder is employed in a liquid crystal device.

Liquid crystal device with phase retarder having layered inorganic

A process for producing a phase retarder film or sheet, which comprises subjecting a stretched thermoplastic resin film or sheet to thermal relaxation at a temperature not lower than the glass transition temperature of the thermoplastic resin to shrink the film or sheet in the stretching axis direction while suppressing the expansion of the film or sheet in a direction parallel to the film or sheet surface and perpendicular to the stretching axis.

Process for producing phase retarder

A process for the selective removal of nitrogen oxides from waste gases containing sulfur oxides as well as nitrogen oxides, which comprises contacting the waste gases with a catalyst comprising active metal oxides consisting of vanadium oxide and at least one of molybdenum oxide and tungsten oxide as a catalytically active component and .alpha.-alumina having a specific surface area of 0.3 to 12 m.sup.2 /g and a pore volume of 0.1 cm.sup.3 /g or more as a carrier wherein the atomic ratio of the vanadium, molybdenum, tungsten and aluminum contained in the carrier alumina is

Selective removal of nitrogen oxides from waste gases containing sulfur

A process for selective removal of nitrogen oxides from waste gases containing 1,500 ppm or less (gas volume) of nitrogen oxides by contacting the waste gases with a metal oxide catalyst containing vanadium oxide and at least one of molybdenum oxide and tungsten oxide with an atomic ratio of the oxide forming elements of:

Selective removal of nitrogen oxides from waste gases using V-Mo-W

A process for the selective removal of nitrogen oxides from waste gases containing nitrogen oxides, which comprises contacting the waste gases with a metal oxide catalyst having the following formula:

Proces for selective removal of nitrogen oxides from waste gases

A method for treating ammonia-containing gases for removing ammonia therefrom, which comprises contacting the ammonia-containing gases with a metal oxide catalyst having the following formula:

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Toyonaka, Japan

Tadashi Shindo