A WATER-RESISTANT SEALING LAYER FOR SEALING MICROCELLS OF ELECTRO-OPTIC DEVICES

The present invention is directed to a sealing layer that comprises a combination of polyurethane and poly(vinyl alcohol), the poly(vinyl alcohol) containing an acetoacetate functional group in its molecular structure. The sealing layer is formed from an aqueous sealing composition and shows water r...

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Bibliographische Detailangaben
Hauptverfasser:	GU, Haiyan, SCHULTZ, Donald A, KC, Chandra Bikram, POELMA, Saemi Oh, BERHANE, Abraham, MATUS, Yuriy Borisovich
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention is directed to a sealing layer that comprises a combination of polyurethane and poly(vinyl alcohol), the poly(vinyl alcohol) containing an acetoacetate functional group in its molecular structure. The sealing layer is formed from an aqueous sealing composition and shows water resistance and good barrier properties to non-polar fluids. The sealing layer can be used to seal microcells of electro-optic displays. La présente invention concerne une couche d'étanchéité qui comprend une combinaison de polyuréthane et de poly(alcool vinylique), le poly(alcool vinylique) contenant un groupe fonctionnel acétoacétate dans sa structure moléculaire. La couche d'étanchéité est formée à partir d'une composition d'étanchéité aqueuse et présente une résistance à l'eau et de bonnes propriétés de barrière aux fluides non polaires. La couche d'étanchéité peut être utilisée pour sceller des microcellules d'affichages électro-optiques.