Triacetyl cellulose film with reduced water transmission property
AssigneeEastman Kodak Company
InventorsWilliam J. Gamble, Joseph L. Lippert
Life of this patent
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Abstract
Disclosed is a triacetyl cellulose film comprising (a) an unsubstituted triphenyl phosphate compound and (b) a lower alkyl-substituted triphenyl phosphate ester compound. Such a film exhibits a reduced rate of water vapor transmission.
Claims20
An optical device containing a triacetyl cellulose film exhibiting improved resistance to water vapor transmission comprising (a) an unsubstituted triphenyl phosphate compound in an amount of 6-15 wt. % of the film and (b) a lower alkyl-substituted triphenyl phosphate ester compound in an amount of 1-5 wt. % of the flint components (a) and (b) being present in amounts sufficient to improve the resistance of the film to water vapor transmission compared to the same film without components (a) and (b).
An optical device comprising a triacetylcellulose film comprising a combination plasticizer containing (a) 6-15 wt. % of the film of an unsubstituted triphenyl phosphate compound and (b) 1-5 wt. % of the film of a fully esterified lower alkyl-substituted triphenyl phosphate ester compound.
Dependencies are inferred from the claim text.