Low resilience urethane foam

Low resilience urethane foam having excellent low resilience at room temperature and having capability of suppressing increase of hardness even at low temperature. The low resilience urethane foam, produced by reaction of urethane foam compositions comprising polyol (a), polyisocyanate (b), catalyst...

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Bibliographische Detailangaben
Hauptverfasser:	INAOKA, KATSUMI, KAGEOKA, MASAKAZU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	Low resilience urethane foam having excellent low resilience at room temperature and having capability of suppressing increase of hardness even at low temperature. The low resilience urethane foam, produced by reaction of urethane foam compositions comprising polyol (a), polyisocyanate (b), catalyst (c) and blowing agent (d), has at least one glass transition point in each of a temperature range of -70 DEG C to -20 DEG C and a temperature range of 0 DEG C to 60 DEG C. Where the glass transition point is expressed as a tandelta peak obtained when measurement on dynamic viscoelasticity of the low resilience urethane foam is carried out at a frequency of 10 herz, at least one of the tandelta peak(s) at the temperature range of -70 DEG C to -20 DEG C is 0.15 or more and at least one of the tandelta peak(s) at the temperature range of 0 DEG C to 60 DEG C is 0.3 or more.