Process for preparing flexible foam

In the present invention there is disclosed a process for preparing flexible foam by reacting prepolymer with NCO value ranging from 3 to 15 percent by weight, which prepolymer is a reaction product obtained by reacting excess of polyisocyanate with polyether polyol or a mixture of such polyols, whe...

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Bibliographische Detailangaben
Hauptverfasser:	BLEYS GERHARD JOZEF, NEYENS VIVIANE GERTRUDE JOHANNA, GERBER DIRK
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:	In the present invention there is disclosed a process for preparing flexible foam by reacting prepolymer with NCO value ranging from 3 to 15 percent by weight, which prepolymer is a reaction product obtained by reacting excess of polyisocyanate with polyether polyol or a mixture of such polyols, whereby this polyol or a mixture thereof average nominal hydroxyl functionality ranges from 2 to 6, average hydroxyl equivalent weight thereof is in the range of 500 to 5000 and contains at least 50 percent by weight of oxyethylene with water, whereby the water amount ranges from 15 to 500 parts by weight per 100 parts by weight of the prepolymer. At the beginning of the reaction the prepolymer temperature ranges between 10 to 50 degC and water temperature is by 10 to 50 degC higher than that of the prepolymer.