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US 5,849,594 AGranted
Carbon dioxide sensitive material
AssigneeSealed Air (NZ) Limited
InventorsSimon Neville Balderson, Robert John Whitwood, Andrew Mills, Lela Margaret Monaf
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Abstract
A carbon dioxide sensitive material including a polymer binder, a plasticiser, a lipophilic organic quaternary cation, an indicator dye anion and an aromatic alcohol in such concentration that the material changes color in accordance with the concentration of carbon dioxide.
Claims11
A carbon dioxide sensitive material comprising, in admixture, a polymer binder, a plasticiser, a lipophilic organic quaternary cation, an indicator dye anion and an aromatic alcohol in such concentration that the material changes colour in accordance with concentration of carbon dioxide.
Dependencies are inferred from the claim text.