Abstract: 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.

Abstract: 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.

Abstract: If it is attempted to produce a polymer polyol at a high concentration, there will be a problem such that during polymerization of a monomer to form fine polymer particles, particles are likely to aggregate one another to form aggregates, and storage stability of the polymer polyol tends to deteriorate. A method for producing a polymer polyol is presented which comprises polymerizing at least one type of ethylenically unsaturated monomer together with a seed particle dispersion, in a polyol, wherein the seed particle dispersion is one obtained by polymerizing an ethylenically unsaturated monomer in the presence of an ethylenically unsaturated macromonomer, a solvent and a chain transfer agent, and the ethylenically unsaturated macromonomer is a reaction product of a specific polyol, an isocyanate compound and an ethylenically unsaturated monomer having a hydroxy group.

Abstract: 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: initial step: supplying the cyclic monomer in an amount of 5 to 20 mass percent of the initiator to a reaction system containing the initiator and the catalyst, to carry out reaction, wherein the reaction system temperature when supply of the cyclic monomer is started is from 120 to 165° C., and the maximum temperature of the reaction system after supply of the cyclic monomer is higher by from 15 to 50° C. than the temperature when supply of the cyclic monomer is started; and polymerization step: supplying the cyclic monomer to the reaction system after the initial step to carry out ring-opening addition polymerization.

Abstract: 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.

Abstract: In producing a polyether in the presence of a double metal cyanide complex catalyst, a narrow molecular weight distribution of the polyether can be obtained. Producing a polyether with at least one hydroxy group includes subjecting a cyclic monomer, such as an alkylene oxide, to a ring-opening addition polymerization with an initiator having a hydroxy group, in the presence of a double metal cyanide complex catalyst.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method for producing a polyoxyalkylene polyol which comprises subjecting propylene oxide and ethylene oxide to ring-opening addition polymerization with an initiator in the presence of a catalyst, wherein the polyoxyalkylene polyol is a polyoxyalkylene polyol obtained by subjecting propylene oxide to ring-opening addition polymerization with an initiator in the presence of a double metal cyanide complex catalyst to form an oxypropylene block chain, subjecting ethylene oxide and propylene oxide to ring-opening addition polymerization randomly to form an oxyalkylene random chain, changing the catalyst and subjecting ethylene oxide to ring-opening addition polymerization in the presence of an alkali metal catalyst to form an oxyethylene block chain, and the polyoxyalkylene polyol is a polyoxyalkylene polyol having a hydroxyl value of from 5 to 56 mgKOH/g, a proportion of an initiator residue of at most 25 mass %, a proportion of the oxypropylene block chain of from 5 to 50 mass %, a total oxyethylene group c

Abstract: 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%.

Abstract: A method for producing a polyoxyalkylene polyol which comprises subjecting propylene oxide and ethylene oxide to ring-opening addition polymerization with an initiator in the presence of a catalyst,

Abstract: 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%.

Abstract: 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.