A cellulose acylate film comprising a cellulose acylate resin satisfying the formulae (i)-(iii) and a compound capable of forming a hydrogen bond satisfying conditions (A)-(C):
(A) the compound has both a hydrogen bond donor moiety and a hydrogen bond acceptor moiety in the molecule,
(B) the value obtained by dividing the molecular weight of the compound by the total of the number of the hydrogen bond donor moiety and the number of the hydrogen bond acceptor moiety is from 30 to 65,
(C) the number of aromatic ring structures is from 1 to 3,
0.5≦
A+B
≦2.7, (i)
0.0≦A≦2.5, and (ii)
0.1≦B≦2.0, (iii)
wherein A means the degree of substitution with an acetyl group, and B means a total of the degree of substitution with a propionyl group and the degree of substitution with a butyryl group.
A cellulose acylate film comprising a cellulose acylate resin satisfying the formulae (i)-(iii) and a compound capable of forming a hydrogen bond satisfying conditions (A)-(C):
(A) the compound has both a hydrogen bond donor moiety and a hydrogen bond acceptor moiety in the molecule,
(B) the value obtained by dividing the molecular weight of the compound by the total of the number of the hydrogen bond donor moiety and the number of the hydrogen bond acceptor moiety is from 30 to 65,
(C) the number of aromatic ring structures is from 1 to 3,
0.5≦
A+B
≦2.7, (i)
0.0≦
A
≦2.5, and (ii)
0.1≦
B
≦2.0, (iii)
wherein A means the degree of substitution with an acetyl group, and B means a total of the degree of substitution with a propionyl group and the degree of substitution with a butyryl group.
CELLULOSE ACYLATE FILM, RETARDATION FILM, POLARIZER AND LIQUID-CRYSTAL DISPLAY DEVICE
申请人:Fukagawa Nobutaka
公开号:US20120180697A1
公开(公告)日:2012-07-19
Provide is a cellulose acylate film, of which the environmental humidity-dependent retardation change is small and which, when stuck to a polarizer and used in high-temperature and high-humidity environments, is effective for preventing the polarizing element from being deteriorated. A cellulose acylate film, which contains a hydrogen-bonding compound satisfying the following requirements (A) to (C), and at least one hydrophobizing agent selected from a polyalcohol ester-base hydrophobizing agent, a polycondensate ester-base hydrophobizing agent and a carbohydrate derivative-base hydrophobizing agent: (A) the compound has both a hydrogen-bonding donor part and a hydrogen-bonding acceptor part in one molecule, (B) the value computed by dividing the molecular weight of the compound by the total number of the hydrogen-bonding donor number and the hydrogen-bonding acceptor number in the compound is from 30 to 65, and (C) the total number of the aromatic ring structures in the compound is from 1 to 3.
OPTICAL FILM, POLARIZING PLATE CONTAINING SAME AND VERTICAL ALIGNMENT LIQUID CRYSTAL DISPLAY DEVICE
申请人:Konica Minolta, Inc.
公开号:US20160033684A1
公开(公告)日:2016-02-04
An optical film that can achieve an intended retardation value suitable for a VA type liquid crystal display while decreasing the Rt fluctuation due to humidity is provided.
An optical film, containing cellulose ester and cellulose ether, in which the cellulose ester satisfies formulae (1), and (2):
2.0≦
X+Y
≦3.0 (1)
0≦
Y
≦1.6 (2)
(in which X is an acetyl group, and Y is a propionyl group and/or a butyryl group); a mixing ratio of the cellulose ester and the cellulose ether (cellulose ester:cellulose ether) is 99.0:1.0 to 55.0:45.0 (mass ratio); and retardations Ro, and Rt expressed in formulae (3), and (4):
Ro
=(
nx−ny
)×
d
(3)
Rt
=(
nx+ny
)/(2−
nz
)}×
d
(4)
(in which nx is an in-plane refractive index of a film in a slow axis direction, ny is an in-plane refractive index of a film in a fast axis direction, nz is a refractive index of a film in a thickness direction, and d is a thickness (nm) of a film) are 20 to 130 nm, and 100 to 300 nm, respectively.