C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 9/12 (2006.01) C01B 33/44 (2006.01) C08K 3/34 (2006.01) C08K 9/08 (2006.01) C08L 31/04 (2006.01)
Patent
CA 2217913
Nanocomposites are manufactured by combining an EVOH matrix polymer and exfoliated intercalates formed by contacting a phyllosilicate with a non-EVOH intercalant to adsorb or intercalate the intercalant between adjacent phyllosilicate platelets. Sufficient intercalant is adsorbed between adjacent phyllosilicate platelets to expand the adjacent platelets to a spacing of at least about 5 .ANG., preferably at least about 10 .ANG. (as measured after water removal), up to about 100 .ANG. and preferably in the range of about 30-40 .ANG., so that the intercalate easily can be exfoliated, e.g., when mixed with the EVOH matrix polymer melt, to provide an EVOH matrix polymer/platelet composite (nanocomposite) material that does not degrade the EVOH matrix polymer.
Des nanocomposites sont fabriqués par combinaison d'un polymère matrice d'EVOH et d'intercalés exfoliés formés par mise en contact d'un phyllosilicate avec un intercalé non-EVOH pour adsorber ou insérer l'intercalé entre des plaquettes de phyllosilicate adjacentes. Suffisamment d'intercalé est adsorbé entre les plaquettes de phyllosilicate adjacentes pour augmenter l'espacement de celles-ci jusqu'à au moins 5 (angstroems) environ, et de préférence d'au moins 10 (mesurée après élimination de l'eau) et jusqu'à 100 environ, en privilégiant une plage d'environ 30-40 , de telle façon que l'intercalé puisse être facilement exfolié, p. ex. par mélange avec le polymère matrice fondu d'EVOH, et former un composite polymère matrice/plaquette d'EVOH (nanocomposite), sans provoquer la dégradation du polymère matrice d'EVOH.
Beall Gary W.
Engman Steven J.
Serrano Fernando M.
Amcol International Corporation
Fetherstonhaugh & Co.
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