Asahi Glass Company, Limited

Nhk Spring Co., Ltd.

Akio Horie

Takayuki Sasaki

Naohiro Kumagai

Takashi Ito

Yoshinori Toyota

Hiroshi Wada

Chitoshi Suzuki

Takeaki Arai

Masahito Furumi

Hideaki Tanaka

Hiroki Fukuda

Hiromitsu Takeyasu

Etsuko Akagi

Kunio Asobe

Satoru Hashimoto

To suppress deterioration of mechanical properties of a foam, by using a polyol system solution stored. A polyol system solution is prepared by using a polyether polyol (A1) having a hydroxy value of from 5 to 45 mgKOH/g and an average number of hydroxy groups of from 2 to 8, obtainable by subjecting an alkylene oxide to ring-opening addition polymerization to an initiator, in the presence of a double metal cyanide complex catalyst, to obtain an intermediate polyol; and subjecting ethylene oxide to a ring-opening addition polymerization in an amount of from 1 to 23 mol per 1 mol of the initiator to the intermediate polyol, in the presence of an alkali metal hydroxide as a polymerization catalyst, and a flexible polyurethane foam is produced by using the polyol system solution.

Process for producing polyether polyol, process for producing flexible polyurethane foam, and seat

A process for producing a polyether having at least one hydroxy group by subjecting a cyclic monomer to ring-opening addition polymerization to an initiator having a hydroxy group in the presence of a double metal cyanide complex catalyst, comprising the following steps:

Polyether and its production process

A flexible polyurethane foam excellent in the vibration characteristics and the load-deflection characteristics, a process for producing the flexible polyurethane foam stably and inexpensively, and a seat for an automobile excellent in posture-stability performance and supported feeling with little bottom-hitting feeling, are provided. When a polyoxyalkylene polyol and a polyisocyanate compound are reacted in the presence of a urethane-forming catalyst, a blowing agent and a foam stabilizer, a predetermined amount of a compound of the following formula (1) is used: wherein the average of n is from 13 to 2,100.

Flexible polyurethane foam, process for its production, and seat for automobile

A novel flexible polyurethane foam having good vibration characteristics and being excellent in occupant posture stability, is provided. A flexible polyurethane foam obtainable by reacting a high molecular weight polyoxyalkylene polyol or a polymer-dispersed polyol containing fine polymer particles in the high molecular weight polyoxyalkylene polyol, with a polyisocyanate compound in the presence of a catalyst, a blowing agent and a foam stabilizer, characterized in that as at least a part of the foam stabilizer, the following fluorinated compound (F) is used in an amount of from 0.00001 to 1 part by mass per 100 parts by mass of all active hydrogen compounds:

Flexible polyurethane foam, process for its production, and seat for automobile employing it

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 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

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Ibaraki, Japan

Akio Horie