초록 ▼

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 i

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 in2-day-atmosphere and a carbon dioxide permeability of less than about 15 cc-mil/100 in2-day-atmosphere at 23°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.

대표청구항 ▼

A multilayer packaging material comprising: (a) at least one layer of a gas-permeable polymeric material; and (b) at least one layer of a thermoset barrier material comprised of a reaction product of: (i) an ungelled amine-functional polymeric resin which is a reaction product of a polyamine and a p

A multilayer packaging material comprising: (a) at least one layer of a gas-permeable polymeric material; and (b) at least one layer of a thermoset barrier material comprised of a reaction product of: (i) an ungelled amine-functional polymeric resin which is a reaction product of a polyamine and a polyepoxide, the polyamine and the polyepoxide present in the reaction mixture at a ratio of from about 1.4:1 to about 0.83:1 based upon moles of polyamine to moles of polyepoxide, 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 and mixtures thereof, the polymeric barrier material further characterized as containing at least about seven percent by weight amine nitrogen based on the total weight of polymeric barrier material and having an oxygen permeability of less than about 3 cc-mil/100 in2-day-atmosphere and a carbon dioxide permeability of less than about 15 cc-mil/100 in2-day-atmosphere at 23°C. and zero percent relative humidity.