C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/10 (2006.01) C01B 33/44 (2006.01)
Patent
CA 2619072
An intercalated layered silicate comprises a layered silicate and an intercalating agent sorbed between the silicate layers of the layered silicate. The amount of intercalating agent is effective to provide an average interlayer spacing between the silicate layers of at least about 20~. The intercalating agent comprises one or more of fatty acid esters of sorbitan, ethoxylated fatty esters of sorbitan, fatty acid esters of glycerol, fatty acid esters of polyglycerol, fatty acid amide waxes, variants of amide waxes, and variants of amides. The intercalated layered silicate may be exfoliated by mixing it with a matrix medium and adding sufficient energy to form a dispersed-particle composition. A packaging film, such as a food packaging film, may comprise the dispersed-particle composition.
La présente invention concerne un silicate en couches intercalé qui comprend un silicate en couches et un agent intercalant sorbé entre les couches du silicate en couches. La quantité d~agent intercalant est efficace pour assurer un espacement intercouches moyen entre les couches du silicate égal à au moins 2 .theta.A environ. L~agent intercalant comprend un ou plusieurs esters d~acides gras de sorbitan, d~esters d~acides gras éthoxylés de sorbitan, d~esters d~acides gras de glycérol, d~esters d~acides gras de polyglycérol, de cires d~amides d~acide gras, de variantes de cires d~amides et de variantes d~amides. Le silicate en couches intercalé peut être exfolié en le mélangeant à un milieu matriciel et en ajoutant suffisamment d~énergie pour former une composition de particules dispersées. Un film d~emballage, tel un film d~emballage alimentaire, peut contenir la composition de particules dispersées.
Beall Gary W.
Becraft Michael L.
Grah Michael D.
Speer Drew V.
Cryovac Inc.
Smart & Biggar
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