Cellulose compound, cellulose film, optical compensation sheet, polarizing plate, and liquid crystal display device
申请人:Oya Toyohisa
公开号:US20080107829A1
公开(公告)日:2008-05-08
A cellulose film, containing a cellulose compound of formula (I),
wherein, R
16
, R
13
, and R
12
represent a hydrogen atom, or a group containing an aliphatic or aromatic group; —X
16
—, —X
13
—, and —X
12
— represent *
1
—O—, *
1
—OOC—, or *
1
—OOCNH—; n
1
represents an average polymerization degree of 10 to 1,500, and the following relationships are satisfied;
DS
16
long<(
DS
13
long
+DS
12
long)
Expression (I)
2.5≧(
DS
13
long
+DS
12
long
+DS
16
long
)>0.01 Expression (II)
wherein DS
16
long
, DS
13
long
, and DS
12
long
represent a substitution degree at the 6-, 3- or 2-position of the substituent having absorption at the longest wavelength, among the 3n
1
substituents on the 6-, 3- or 2-position; and said substituent has an absorption maximum wavelength at the longest wavelength in the range of 270 to 450 nm and a molar extinction coefficient of 2,000 to 1,000,000 for a solution of CH
3
—X
16
—R
16
, CH
3
—X
13
—R
13
or CH
3
—X
12
—R
12
corresponding to —X
16
—R
16
, —X
13
—R
13
or —X
12
—R
12
, respectively.
一种纤维素薄膜,含有式(I)的纤维素化合物,其中,R16、R13和R12代表氢原子或含有脂肪族或芳香族基团的基团;—X16—、—X13—和—X12—代表*1—O—、*1—OOC—或*1—OOCNH—;n1表示10至1,500的平均聚合度,并满足以下关系式;DS16long < (DS13long + DS12long)式(I)2.5≧(DS13long + DS12long + DS16long) > 0.01 式(II)其中DS16long、DS13long和DS12long代表在6位、3位或2位取代基中吸收最长波长的取代基的取代度,而该取代基在270到450 nm范围内具有最长波长的吸收最大值,并且对应于—X16—R16、—X13—R13或—X12—R12的CH3—X16—R16、CH3—X13—R13或CH3—X12—R12的溶液的摩尔消光系数为2,000至1,000,000。