METHOD OF MAKING POLYURETHANE FOAM AND POLYURETHANE FOAM ARTICLE

Herein are disclosed an apparatus and method for reaction injection molding of polyurethane foam. In the method, a recirculation loop ( 10 ) containing polyols along with an effective amount of water, and a recirculation loop ( 30 ) containing isocyanates, are each partially evacuated. L'invent...

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Bibliographische Detailangaben
Hauptverfasser:	DOW, DAVID R, LENZENDORF, JEFFREY P, DUNHAM, GRADY A, BENSON-SARGENT, ELIZABETH A, EARL, DOUGLAS E
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING MAKING GRANULES OR PREFORMS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Herein are disclosed an apparatus and method for reaction injection molding of polyurethane foam. In the method, a recirculation loop ( 10 ) containing polyols along with an effective amount of water, and a recirculation loop ( 30 ) containing isocyanates, are each partially evacuated. L'invention concerne un appareil et un procédé de moulage par injection de mousse polyuréthane. Dans ce procédé, une boucle de recirculation (10) contenant des polyols ainsi qu'une quantité efficace d'eau, et une boucle de recirculation (30) contenant des isocyanates sont chacune partiellement évacuées.