The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2001
Filed:
Jun. 01, 1999
Tie Lan, Lake Zurich, IL (US);
Anthony S. Tomlin, Island Lake, IL (US);
Vasiliki Psihogios, Wheeling, IL (US);
AMCOL International Corporation, Arlington Heights, IL (US);
Abstract
Nanocomposite layered materials prepared by co-intercalation of an onium ion, preferably an alkoxylated onium ion and an ethylene vinyl alcohol oligomer or polymer between the planar layers of a swellable layered material, such as a phyllosilicate, preferably a smectite clay. The spacing of adjacent layers of the layered materials is expanded at least about 3 Å, preferably at least about 5 Å, usually preferably to a d-spacing of about 15-20 Å, e.g., 18 Å with the alkoxylated onium ion spacing/coupling agent. The intercalation of the ethylene vinyl alcohol polymer then increases the spacing of adjacent layers an additional at least 2 Å, e.g., to at least about 20 Å, preferably about 25 Å to about 30 Å, generally about 28 Å. Improved O,barrier properties are observed over a broad range of humidity conditions when intercalation is accomplished by both the solvent route and the direct compounding route. The intercalated and exfoliated layered materials are useful for barrier layers in multi-layer packaging and for coatings.