Provided is a polyurethane foam having a reduced stress relaxation rate and a reduced hysteresis loss rate while having moderate rebound elasticity.The polyurethane foam is obtained from a composition containing a polyol and an isocyanate. As the polyol, a polyol (a) having a content of an ethylene oxide unit of 60 mol% or more is contained when a total amount of alkylene oxide units is 100 mol%, and a content of the polyol (a) is 60 parts by mass or more and 95 parts by mass or less when a total amount of the polyol is 100 parts by mass.
POLYURETHANE FOAM AND SEAT PAD
MOUSSE DE POLYURETHANE ET COUSSIN DE SIEGE
2022-08-18
Patent
Electronic Resource
English
IPC: | A47C Stühle , CHAIRS / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind |
European Patent Office | 2020
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