Dai Nippon Printing Co., Ltd.

Asahi Glass Company, Limited

Kayoko Sugiyama

Masayuki Iijima

Yoshiaki Tsuruoka

Osamu Shimizu

Akio Horie

Yuichi Nakayasu

Hiroshi Wada

Yoshinori Toyota

Takashi Aono

Takayuki Sasaki

Hiroki Fukuda

Shigeru Ikai

Hiromitsu Takeyasu

Etsuko Akagi

Yoshinori c/o Asahi Glass Company Ltd Toyota

Akio c/o Asahi Glass Urethane Co Ltd Horie

Methods for producing a polyol and a polymer dispersed polyol

A process for producing a flexible polyurethane foam satisfying low resilience, high vibration absorption and high durability, is presented. A mixture comprising from 95 to 50 mass % of a polyoxyalkylene polyol produced by means of an alkali metal catalyst and from 5 to 50 mass % of a polyoxyalkylene polyol produced by means of a double metal cyanide complex catalyst, is reacted with a polyisocyanate compound in the presence of a catalyst and a blowing agent, to produce a flexible polyurethane foam having a resonance frequency of at most 3.7 Hz, a resonance ratio of at most 3.5 and an impact resilience of at most 70%.

Process for producing flexible polyurethane foam

A process for producing a double metal cyanide complex catalyst for ring opening polymerization of alkylene oxide, which comprises subjecting a substantially crystalline double metal cyanide compound to a contact treatment by heating at from 45 to 125&deg; C. with an aqueous solution containing an organic ligand and a metal salt, and then separating the resulting solid from the obtained slurry.

Double metal cyanide complex catalyst for ring opening polymerization of alkylene oxide and its production process

A resilient polyurethane foam produced by using a polyether polyol produced by reacting alkylene oxides with a polyhydroxy compound having at least 2 hydroxyl groups as an initiator in the presence of the catalyst for alkylene oxide ring-opening polymerization of the present invention, which is excellent in foam physical properties, vibration characteristics and molding properties.

Catalyst for ring-opening polymerization of alkylene oxide, method for preparation thereof and use thereof

The electrostatic information recording medium of the present invention has an electric charge retaining layer 11 stacked on at least an electrode layer 13, as shown in FIG. 1. The electric charge retaining layer is formed from either 1 a resin selected from among fluorocarbon resins, and an insulating organic substance having no photoconductivity, or 2 a fluorine-containing thermoplastic resin consisting of a repeating unit represented by formula (1): ##STR1## (where the content of the dioxonol component represented by the number m of repeating units is in the range of 20 mol % to 90 mol %) the fluorine-containing thermoplastic resin having a melt viscosity of 10.sup.2 to 10.sup.4 Pa.sec at a temperature which is 90.degree. C. to 110.degree. C. higher than its glass transition temperature.

Electrostatic information recording medium

The electrostatic information recording medium of the present invention has an electric charge retaining layer 11 stacked on at least an electrode layer 13, as shown in FIG. 1. The electric charge retaining layer is formed from either 1 a resin selected from among fluorocarbon resins and polystyrene resins, and an insulating organic substance having no photoconductivity. The electrostatic information recording medium may be produced, as shown in FIG. 5, by stacking an insulating resin layer 10 on an electrode layer 13, stacking a photoconductive or electrically conductive fine particle layer 11 on the insulating resin layer 10, and further stacking an insulating resin layer 12 on the fine particle layer 11 to a thickness of 0.1 .mu.m to 1 .mu.m. If the insulating resin layers 10 and 12 are formed by coating using a fluorocarbon resin solution, the electrostatic information recording medium can be produced with excellent processability.

Recording medium including latent image charge trap and methods

Charge carrier medium and reproduction of electrostatic latent image

Growing community of inventors

Tokyo, Japan

Kayoko Sugiyama