WATER-BLOWN RIGID FOAMS FOR THE INSULATION OF LIQUEFIED NATURAL GAS TANKS

The present invention relates to a rigid polyurethane foam comprising reinforcing materials and obtainable by mixing (a) isocyanates which have a viscosity at 25°C of less than 500 mPas with (b) compounds having groups which are reactive toward isocyanates, (c) blowing agents comprising water, (d) c...

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Bibliographische Detailangaben
Hauptverfasser:	THANE KATRIN, LEHMANN PIT, HWANG, CHEOL HYUN
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON 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:	The present invention relates to a rigid polyurethane foam comprising reinforcing materials and obtainable by mixing (a) isocyanates which have a viscosity at 25°C of less than 500 mPas with (b) compounds having groups which are reactive toward isocyanates, (c) blowing agents comprising water, (d) catalysts and, if appropriate, (e) further additives to form a reaction mixture and applying the reaction mixture to a reinforcing material, where the compounds (b) having groups which are reactive toward isocyanates comprise a polyetherol (b1) having a functionality of 4 or more and a viscosity at 25°C of 10000 mPas or less and a polyetherol (b2) having a functionality of 3 or less and a viscosity at 25°C of 500 mPas or less. The present invention further relates to a process for producing such rigid polyurethane foams and to the use of the rigid polyurethane foams for the insulation of liquefied natural gas tanks.