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US 2006/0078754 A1Published application
Optical film, polarizing plate and display
AssigneeKonica Minolta Opto, Inc.
InventorsTakashi Murakami, Isamu Michihata
Life of this patent
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Abstract
A method for producing an optical film comprising steps of mixing a heated and molten cellulose ester having an acylated degree for from 2.5 to 2.9 and at least one of a UV absorbent having at least two benzotriazole skeletons and a UV absorbent having a weight average molecular weight of from 2,000 to 50,000 to form a mixture, and extruding the mixture to form a film.
Claims9
A method for producing an optical film comprising steps of
- mixing a heated and molten cellulose ester having an acylated degree of from 2.5 to 2.9 and at least one of a UV absorbent having at least two benzotriazole skeletons and a UV absorbent having a weight average molecular weight of from 2,000 to 50,000 to form a mixture, and extruding the mixture to form a film.
Dependencies are inferred from the claim text.