Polyol composition for producing flexible polyurethane foam and flexible polyurethane foam

Patent metadata

Field	Value
Publication number	US-9914813-B2
Application number	US-201615097771-A
Country	US
Kind code	B2
Filing date	Apr 13, 2016
Priority date	Apr 17, 2015
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A polyrotaxane is blended into a polyol composition, which can reduce the tensile stress of a flexible polyurethane foam. A vertical compressive stress due to the weight of a sitting user and a tensile stress due to the input of lateral vibrations act on a urethane pad. However, by reducing the tensile stress of the flexible polyurethane foam, the direction (inclination) of a resultant force obtained by combining the compressive stress and the tensile stress can be brought close to the vertical direction. Thus, the angle of inclination of the user's hip (ischium) on the urethane pad to the vertical direction due to the input of lateral vibrations can be reduced, so that the sense of wobble of the urethane pad can be reduced.

First claim

The invention claimed is:

1. A polyurethane forming composition for producing a flexible polyurethane foam,
the polyurethane forming composition containing a polyol component, an isocyanate component capable of reacting with the polyol component, a polyrotaxane, and a foaming agent,
wherein the polyrotaxane includes an axle molecule including cyclic molecules thereon in a skewered manner and stopper groups placed at both ends of the axle molecule.

2. The polyurethane forming composition according to claim 1 , wherein the polyrotaxane has a hydroxyl value of 30 to 85 mgKOH/g.

3. The polyurethane forming composition according to claim 1 , wherein the polyrotaxane is blended in 0.9 to 30 parts by mass relative to 100 parts by mass of the polyol component.

4. A flexible polyurethane foam obtained by foaming and curing a composition, the composition including:
a polyol component;
an isocyanate component capable of reacting with the polyol component; and
a polyrotaxane including an axle molecule including cyclic molecules thereon in a skewered manner and stopper groups placed at both ends of the axle molecule.

Assignees

• Toyo Tire & Rubber Co
• Advanced Softmaterials Inc

Inventors

• Takemoto Masahiko
• Hayashi Yuki

Classifications

• C08J2205/06

  Flexible foams · CPC title

• C08G18/283

  Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds · CPC title

• C08G18/3275

  containing two hydroxy groups · CPC title

• C08J2201/022

  premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming · CPC title

• C08J2400/21

  Polyrotaxanes; Polycatenanes · CPC title