Flexible polyurethane foam

• US 20060148922A1
• Filed: 03/02/2006
• Published: 07/06/2006
• Est. Priority Date: 02/17/2003
• Status: Abandoned Application

• Current Assignee: NHK Spring Company Limited
• Original Assignee: NHK Spring Company Limited
• Inventors: Hashimoto, Satoru, Asobe, Kunio
• Application Number:
  US11/366,074
• Publication Number:
  US 20060148922A1
• Time in Patent Office: Days
• US Class Current: 521/172
• CPC Class Codes: C08G 18/40 High-molecular-weight compounds C08G18/2805 takes precedence
• CPC Class Codes: C08G 2110/0008 flexible
• CPC Class Codes: C08G 2110/0083 prepared using water as the sole blowing agent
• CPC Class Codes: C08G 2350/00 Acoustic or vibration damping material
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 9/0019 halogenated

Abstract

A flexible polyurethane foam for a cushioning material, the flexible polyurethane foam comprising a polyol and an isocyanate as main components, and a fluoride surfactant as a cell regulator, wherein the fluoride surfactant has the structure of a perfluoroalkyl group, exhibits a foaming height of 3 mm or more in a toluene solution containing thereof in a concentration of 0.1% by mass or an aqueous ethanol solution in a concentration of 60% by mass five minutes after the toluene solution of the aqueous ethanol solution is stirred.

Claims

1. A method of selecting a cell structure regulator for a flexible polyurethane foam for a cushioning material comprising a polyol and an isocyanate as main components, the method comprising:

selecting a cell structure regulator for a flexible polyurethane foam for a cushioning material, which contains a fluoride surfactant having a structure of a perfluoroalkyl group, and exhibits a foaming height of 3 mm or more in a toluene solution containing the surfactant at a concentration of 0.1 % by mass or in an aqueous ethanol solution containing the surfactant at a concentration of 60% by mass, five minutes after the toluene solution or the aqueous ethanol solution is stirred.

2. A method of obtaining a flexible polyurethane foam for a cushioning material comprising a polyol and an isocyanate as main components, the method comprising:

obtaining a flexible polyurethane foam comprising the cell structure regulator selected by the method according to claim 1, the flexible polyurethane foam having a humidity/heat compression residual deflection at a temperature 49 to 51°

C. and a humidity 90 to 100% and a reduction rate of repeated compression 25% hardness both lower by 5% or more, as compared to a flexible polyurethane foam that has the same density and 25% hardness as those of the polyurethane foam but contains no said fluoride surfactant.

3. A method of obtaining a flexible polyurethane foam for a cushioning material comprising a polyol and an isocyanate as main components, the method comprising:

obtaining a flexible polyurethane foam comprising the cell structure regulator selected by the method according to claim 1, the flexible polyurethane foam having a deflection difference between pressure 490N and 882N in a static load test larger by 1 mm or more, as compared to a flexible polyurethane foam that has the same density and 25% hardness as those of the polyurethane foam but contains no said fluoride surfactant.

4. A method of obtaining a flexible polyurethane foam for a cushioning material comprising a polyol and an isocyanate as main components, the method comprising:

obtaining a flexible polyurethane foam comprising the cell structure regulator selected by the method according to claim 1, the flexible polyurethane foam having a resonance magnification and transmissibility of 6Hz both lower by 5% or more, as compared to a flexible polyurethane foam that has the same density and 25% hardness as those of the polyurethane foam but contains no said fluoride surfactant.

5. A method of obtaining a flexible polyurethane foam for a cushioning material comprising a polyol and an isocyanate as main components, the method comprising:

obtaining a flexible polyurethane foam comprising the cell structure regulator selected by the method according to claim 1, the flexible polyurethane foam having a change rate of 25% hardness with a humidity smaller by 5% or more, as compared to a flexible polyurethane foam that has the same density and 25% hardness as those of the urethane foam but contains no said fluoride surfactant.