Cellulose Acetate Film
Provided is a cellulose acetate film for optical compensation, which has a low retardation value R th in the film thickness direction.
1 - 11 . (canceled)
12 . A cellulose acetate film comprising one or more inhibitor(s) reducing retardation (R th ) in the film thickness direction, which is represented by Chemical Formula 1:
wherein
R 1 and R 2 independently represent
and R 3 , R 4 , R 11 , R 12 and R 13 are independently selected from hydrogen, (C1-C7)alkyl, (C6-C20)aryl, (C3-C20)cycloalkyl, (C2-C7)alkenyl, 5- to 7-membered heterocycloalkyl containing one or more element(s) selected from N, O and S, and (C4-C20) heteroaryl containing one or more element(s) selected from N, O and S,
wherein the alkyl, aryl, cycloalkyl, alkenyl, heterocycloalkyl or heteroaryl of R 3 , R 4 , R 11 , R 12 and R 13 may be further substituted by one or more substituent(s) selected from (C1-C7)alkyl, halogen, nitro, cyano, hydroxyl, amino, (C6-C20)aryl, (C2-C7)alkenyl, (C3-C20)cycloalkyl, 5- to 7-membered heterocycloalkyl containing one or more element(s) selected from N, O and S, and (C4-C20) heteroaryl containing one or more element(s) selected from N, O and S, and
R 3 and R 4 , and R 11 and R 12 may be independently linked via (C3-C20)alkylene or (C3-C20)alkenylene to form an alicyclic ring, with the proviso that R 3 , R 4 , R 11 , R 12 and R 13 are not hydrogens at the same time.
13 . The cellulose acetate film according to claim 12 ,
wherein R 1 and R 2 independently represent
and R 3 , R 4 , R 11 , R 12 and R 13 are independently selected from hydrogen, (C1-C5)alkyl, (C6-C12)aryl, (C3-C10)cycloalkyl, (C2-C5)alkenyl, 5- or 6-membered heterocycloalkyl containing one or more element(s) selected from N, O and S, and (C4-C10) heteroaryl containing one or more element(s) selected from N, O and S,
wherein the alkyl, aryl, cycloalkyl, alkenyl, heterocycloalkyl or heteroaryl may be further substituted by one or more substituent(s) selected from hydrogen, (C1-C7)alkyl, amino, (C6-C20)aryl, (C2-C7)alkenyl, (C3-C20)cycloalkyl, and
R 3 and R 4 , and R 11 and R 12 may be independently linked via (C3-C10)alkylene or (C3-C10)alkenylene to form an alicyclic ring, with the proviso that R 3 , R 4 , R 11 , R 12 and R 13 are not hydrogens at the same time.
14 . The cellulose acetate film according to claim 13 , wherein the compound represented by Chemical Formula 1 is selected from the following compounds:
15 . The cellulose acetate film according to claim 12 ,
wherein R e (λ) and R th (λ) of the film satisfy the requirements of (I) and (II):
0 ≦R e (588.9)≦10,| R th (588.9)|≦25, (I)
| R e (400)− R e (700)|≦10 ,|R th (400)− R th (700)|≦35 (II)
wherein R e (λ) is a retardation value (unit: nm) in the film plane at a wavelength λ (nm), and R th (λ) is a retardation value (unit: nm) in the film thickness direction at a wavelength λ (nm).
16 . A cellulose acetate composition comprising 1 to 20 parts by weight of one or more retardation inhibitor(s) represented by Chemical Formula 1, based on 100 parts by weight of cellulose acetate:
wherein
R 1 and R 2 independently represent
and R 3 , R 4 , R 11 , R 12 and R 13 are independently selected from hydrogen, (C1-C7)alkyl, (C6-C20)aryl, (C3-C20)cycloalkyl, (C2-C7)alkenyl, 5- to 7-membered heterocycloalkyl containing one or more element(s) selected from N, O and S, and (C4-C20) heteroaryl containing one or more element(s) selected from N, O and S,
wherein the alkyl, aryl, cycloalkyl, alkenyl, heterocycloalkyl or heteroaryl of R 3 , R 4 , R 11 , R 12 and R 13 may be further substituted by one or more substituent(s) selected from (C1-C7)alkyl, halogen, nitro, cyano, hydroxyl, amino, (C6-C20)aryl, (C2-C7)alkenyl, (C3-C20)cycloalkyl, 5- to 7-membered heterocycloalkyl containing one or more element(s) selected from N, O and S, and (C4-C20) heteroaryl containing one or more element(s) selected from N, O and S, and
R 3 and R 4 , and R 11 and R 12 may be independently linked via (C3-C20)alkylene or (C3-C20)alkenylene to form an alicyclic ring, with the proviso that R 3 , R 4 , R 11 , R 12 and R 13 are not hydrogens at the same time.
17 . The cellulose acetate composition according to claim 16 , wherein the composition further comprises one or more additive(s) selected from UV stabilizer, minute particles, plasticizer, degradation inhibitor, release agent, IR absorber, and optical anisotropy control agent.
18 . A cellulose acetate film prepared from the cellulose acetate composition according to claim 16 .
19 . An optical compensation sheet comprising the cellulose acetate film according to claim 12 .
20 . An optical compensation sheet comprising the cellulose acetate film according claim 14 .
21 . An optical compensation sheet comprising the cellulose acetate film according to claim 15 .
22 . A polarizing plate comprising the cellulose acetate film according to claim 12 .
23 . A polarizing plate comprising the cellulose acetate film according to claim 14 .
24 . A polarizing plate comprising the cellulose acetate film according to claim 15 .
25 . A liquid crystal display comprising the cellulose acetate film according to claim 12 .
26 . A liquid crystal display comprising the cellulose acetate film according to claim 14 .
27 . A liquid crystal display comprising the cellulose acetate film according to claim 15 .
28 . The liquid crystal display according to claim 24 , which is an in-plane switching (IPS) mode liquid crystal display.
29 . The liquid crystal display according to claim 26 , which is an in-plane switching (IPS) mode liquid crystal display.
30 . The liquid crystal display according to claim 27 , which is an in-plane switching (IPS) mode liquid crystal display.