Barrier coatings

Details Barrier coatings Barrier coatings

1995-10-27

1996-11-12

Cannon, James C.

Stock material or miscellaneous articles

Hollow or container type article

Flexible food casing

426106, 426128, 426129, 426130, 428 354, 428 357, 428 366, 428412, 428413, 428480, 428500, B32B 2708, B32B 3300

Patent

active

055738192

ABSTRACT:
Barrier materials for reducing the permeability of plastic packaging materials are provided, characterized as containing at least about seven percent by weight amine nitrogen, or a total of at least about 17 percent amine nitrogen plus hydroxyl groups. The barrier materials exhibit oxygen permeability of less than about 1.5 cc-mil/100 in.sup.2 -day-atmosphere and a carbon dioxide permeability of less than about 15 cc-mil/100 in.sup.2 -day-atmosphere at 23.degree. C. and zero percent relative humidity. The barrier material can be formed from polyepoxide and polyamine. Optionally the polyamine may comprise prereacted polymeric resin formed from a polyepoxide and a polyamine. Multilayer packaging materials and multilayer containers including the polyamine-polyepoxide barrier material are part of the invention.

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