Polyvinyl alcohol powder

The present invention provides a polyvinyl alcohol powder having an average pore diameter of 0.1 to 10 mu m and a pore volume in the range of 0.05 to 0.4 cm /g Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared indus...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	NARUMOTO NAOTO, KITAMURA TAKANORI, TSUGIYA TAKANORI, TAKENOUCHI YUJI, YANAI HISAMICHI
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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides a polyvinyl alcohol powder having an average pore diameter of 0.1 to 10 mu m and a pore volume in the range of 0.05 to 0.4 cm /g Since the PVA powder of the present invention has an excellent solubility in water, an aqueous solution thereof can easily be prepared industrially. Since the PVA powder of the present invention has a low content of an organic volatile component and a low content of a nonvolatile component such as a carboxylic acid salt or the like which is derived from a basic catalyst, it has an excellent industrial handleability.