US 8,274,625 B2 · Cellulose ester film, method for production of cellulose ester film, and protective film for polarizing plate, polarizing plate and liquid crystal display device each using the cellulose ester film

Abstract

Disclosed is a cellulose ester film which rarely causes the attachment of foreign matters to the surface of a conveying roll or the failure of film transfer induced by the attachment of the foreign matters, which is free of the partial deformation caused by foreign matters on the conveying roll, exhibits high durability after saponification treatment, has good close adhesion to a polarizer, and has excellent processing suitability in the processing into a polarizer. Also disclosed is a method for producing the cellulose ester film by a melt-casting process. Further disclosed are; a protective film for a polarizing plate, which has high film strength; a polarizing plate having high durability; and a liquid crystal display having high image quality; each comprising the cellulose ester film. The cellulose ester film comprises a cellulose ester, a compound represented by the general formula (1) and a compound represented by the general formula (2).

Claims14

Dependent claims

A cellulose ester film comprising:

a cellulose ester;
a compound represented by Formula (1);
and a compound represented by Formula (2);
wherein G represents a monosaccharide residue or a polysaccharide residue having 2 to 10 monosaccharide units;
L represents a divalent linking group comprising one or more group selected from a group of a single bond, —O—, —CO—, —NR2— (wherein R2 represents an aliphatic group or an aromatic group), and an aliphatic group;
R1 represents an aliphatic group or an aromatic group, each of which may have a substituent respectively;
m and n represent an integer of 1 or more;
r represents an integer of 3 or more and m+n≧3;
and
the cellulose ester film satisfies Expression (I);
Expression (I) 0.20<a/(a+b)<0.80, wherein a represents the percent by weight of the compound represented by Formula (1) in the cellulose ester film, and b represents the percent by weight of the compound represented by Formula (2) in the cellulose ester film.

8 more elements

Dependencies are inferred from the claim text.

Cellulose ester film, method for production of cellulose ester film, and protective film for polarizing plate, polarizing plate and liquid crystal display device each using the cellulose ester film

Life of this patent

Cellulose ester film, method for production of cellulose ester film, and protective film for polarizing plate, polarizing plate and liquid crystal display device each using the cellulose ester film

Life of this patent

Abstract

Claims14