Slow-rebound polyether polyurethane sponge

The invention relates to polyurethane sponge, in particular to slow-rebound polyether polyurethane sponge, which comprises, by weight, 20-85 parts of first polyhydric alcohol, 10-90 parts of second polyhydric alcohol, 8-30 parts of MDI (diphenylmethane diisocyanate), foaming agent, catalyst, surface...

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Bibliographische Detailangaben
Hauptverfasser:	LI TONGSONG, LU WEI, QIU LINGDI
Format:	Patent
Sprache:	chi ; 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 USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to polyurethane sponge, in particular to slow-rebound polyether polyurethane sponge, which comprises, by weight, 20-85 parts of first polyhydric alcohol, 10-90 parts of second polyhydric alcohol, 8-30 parts of MDI (diphenylmethane diisocyanate), foaming agent, catalyst, surface active agent, flame retardant and 0.2-0.8 part of silicon rubber toughening agent, wherein the first polyhydric alcohol refers to polymer of ethylene glycol and propylene glycol, the degree of functionality of the first polyhydric alcohol is 3, and the hydroxyl value of the first polyhydric alcohol is 45-99mgKOH/g; and the second polyhydric alcohol refers to copolymerized polyol of trimethylolpropane and epoxy butane, the EO (ethylene oxide) content of the second polyhydric alcohol is higher than 60%, and the hydroxyl value of the second polyhydric alcohol is 3-22mgKOH/g. The slow-rebound polyether polyurethane sponge is slow in rebound time, proper in hardness and less susceptible to temperature.