PRODUCTION OF POLYURETHANE MOLDING

PURPOSE:To produce a polyurethane molding with good reactivity and self- releasability by a reaction injection molding process, by employing a material containing a specified polyol component. CONSTITUTION:A composition comprising a polymer polyol containing at least 20wt% polyoxyethylene chain-term...

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Bibliographische Detailangaben
Hauptverfasser:	NAGATA KOUSABUROU, ISHIKAWA ISAO, TOMOSADA TSUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To produce a polyurethane molding with good reactivity and self- releasability by a reaction injection molding process, by employing a material containing a specified polyol component. CONSTITUTION:A composition comprising a polymer polyol containing at least 20wt% polyoxyethylene chain-terminated polyol containing internal random polyoxyethylene chains and having a functionality >=5 and an equivalent weight >=1,450, an organic polyisocyanate (e.g., toluene diisocyanate) and, optionally, a blowing agent is poured into a desired mold and reaction injection-molded into a polyurethane molding. By the use of the above material, molding can be repeated about 10-20 times for each application of a releasing agent with good mold releasability.