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US 5,418,055 AGranted
Hydrohalocarbon resistant refrigerator liners
AssigneeE. I. Du Pont de Nemours and Company
InventorsJohn C. Chen, Anita N. Diandreth
Life of this patent
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Abstract
The present invention is directed to a refrigeration cabinet comprising an interior liner, a foam insulation derived from an HHC blowing agent and an outer wall. The interior liner comprises a styrene-based inner layer, an adhesive layer, and a barrier layer. The adhesive layer comprises an ethylene copolymer grafted with an anhydride or carboxylic acid moiety, and a styrene-based polymer or copolymer. The barrier layer comprises an ethylene vinyl alcohol copolymer.
Claims8
A refrigeration cabinet comprising:
- an interior liner having a single styrene-based structural layer susceptible to damage upon exposure to hydrohalocarbon blowing agents, an outer wall and an insulation foam disposed between the interior liner and the outer wall, said foam being derived from a hydrohalocarbon blowing agent,
- said interior liner having:
- (a) the singular styrene-based structural layer susceptible to damage upon exposure to hydrohalocarbon blowing agents,
- (b) an adhesive layer in contact with the styrene-based structural layer, said adhesive layer comprising an ethylene copolymer grafted with an anhydride or carboxylic acid moiety, and
- (c) a hydrohalocarbon barrier layer in contact with the adhesive layer, said layer acting as a barrier between the styrene-based structural layer and the insulation foam wherein said barrier layer comprises at least about 50 weight percent ethylene vinyl alcohol copolymer and wherein the vinyl alcohol moieties are at least about 80% saponified, said ethylene vinyl alcohol copolymer comprising from about 25 to about 60 mole percent ethylene moieties.
2 more elements
Dependencies are inferred from the claim text.