Barrier coatings

Details Barrier coatings Barrier coatings

1989-06-19

1991-04-16

Seidleck, James

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 366, 428412, 428413, 428483, 428516, 428523, 525525, 525526, B65D 2500, B32B 2708

Patent

active

050081373

ABSTRACT:
Multilayer packaging materials and multilayer containers including a barrier material having excellent resistance to gas permeability are provided. The multilayer packaging materials and containers include at least one permeable polymeric material and at least one layer of a barrier material which is a reaction product of: (i) an ungelled amine-functional polymeric resin, which is a reaction product of a polyamine and a polyfunctional material having at least two functional groups reactive with said polyamine, the ungelled polymeric resin further containing an average of greater than two polyamine moieties per molecule within said resin; and (ii) a material selected from the group consisting of a polyepoxide, a polyoxalate or mixtures thereof, the barrier material characterized as containing at least about four percent by weight amine nitrogen and having an oxygen permeability of less than about 3 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 coating compositions including as co-curable resinous materials, e.g., a polyepoxide and an ungelled amine-functional polymeric resin formed from a polyepoxide and a polyamine having up to about two primary amino nitrogen groups per molecule, the polyamine and polyepoxide present in a reaction mixture at a molar ratio of from about 1.4:1 to about 0.83:1.

REFERENCES:
patent: 2830721 (1958-04-01), Pinsky et al.
patent: 2909448 (1959-10-01), Schroeder
patent: 3337609 (1967-08-01), Williamson et al.
patent: 3399162 (1968-08-01), Salame
patent: 4528219 (1985-07-01), Yamada et al.
Salame, "Permeability of Plastics: Inherent Limitation or Not?", Problem Solving Plast., Compilation Pap. Symp. 1971, Pub.: Nat. Assn. Corros. Eng., 82-86.

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