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US 5,292,876 AGranted
Mixed cellulose esters
AssigneeEastman Kodak Company
InventorKenneth E. Simmons
Life of this patent
Estimating the term…
Abstract
Disclosed are novel species of cellulose acetate butyrates and propionates that have significant surface activity. The cellulose acetate butyrate/propionate contains 9-16 wt. % butyryl or propionyl, 6-11 wt. % acetyl, and 12-15 wt. % hydroxyl.
Claims15
A mixed cellulose ester having
- 9 to 16 weight % butyryl or propionyl;
- 6 to 11 weight % acetyl;
- and
- 12 to 15 weight % hydroxyl;
- wherein said mixed cellulose ester has a surface tension of less than about 45 dynes/cm measured as a 0.1 weight % aqueous solution.
2 more elements
Dependencies are inferred from the claim text.