Stretched optical compensation film

Patent metadata

Field	Value
Publication number	US-9417360-B2
Application number	US-201214358068-A
Country	US
Kind code	B2
Filing date	Nov 13, 2012
Priority date	Nov 15, 2011
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

Disclosed is a stretched optical compensation film which is a phase difference film containing a cellulose-based resin and having excellent optical properties. The stretched optical compensation film of the present invention contains 0.5 to 30 parts by mass of a β-diketone compound represented by Formula (I) with respect to 100 parts by mass of the cellulose-based resin. Positions R 1 and R 2 each independently represent an alkyl group having 1 to 20 carbon atoms which is optionally substituted, an arylalkyl group having 7 to 20 carbon atoms which is optionally substituted or an aryl group having 6 to 20 carbon atoms which is optionally substituted. Position R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

First claim

The invention claimed is:

1. A stretched optical compensation film comprising 0.5 to 30 parts by mass of a β-diketone compound represented by the following Formula (I) with respect to 100 parts by mass of a cellulose-based resin:

wherein, R 1 and R 2 each independently represent an alkyl group having 1 to 20 carbon atoms which is optionally substituted, an arylalkyl group having 7 to 20 carbon atoms which is optionally substituted or an aryl group having 6 to 20 carbon atoms which is optionally substituted;
R 3 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms; and
at least one of R 1 and R 2 represents an alkyl group.

2. The stretched optical compensation film according to claim 1 , wherein said β-diketone compound is a compound in which, in said Formula (I), one of R 1 and R 2 is an aryl group that is optionally substituted.

3. The stretched optical compensation film according to claim 2 , wherein said cellulose-based resin is cellulose acylate.

4. The stretched optical compensation film according to claim 2 , wherein said β-diketone compound is a compound in which, in said Formula (I), the R 1 or R 2 that is not the aryl group is a methyl group.

5. The stretched optical compensation film according to claim 1 , wherein said cellulose-based resin is cellulose acylate.

6. The stretched optical compensation film according to claim 1 , wherein the β-diketone compound is

7. The stretched optical compensation film according to claim 6 , wherein said cellulose-based resin is cellulose acylate.

Assignees

• Adeka Corp

Inventors

• Harada Masashi
• Tanaka Yuki
• Murakami Takashi
• Endo Yuki
• Segawa Masaki

Classifications

• G02B1/045 Primary

  Light guides · CPC title

• G02B5/3083 Primary

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title

• G02B5/32

  Holograms used as optical elements · CPC title

• C08L1/12

  Cellulose acetate · CPC title

• G02B2207/113

  Fluorescence · CPC title