Title:
CELLULOSE DIACETATE FOR RETARDATION FILM
Document Type and Number:
WIPO Patent Application WO/2011/093216
Kind Code:
A1
Abstract:
Disclosed is a cellulose acetate that enables a cellulose acetate optical film, which expresses optical properties when stretched, to achieve excellent stretchability and excellent optical properties after being stretched.
Specifically disclosed is a cellulose diacetate for a retardation film, which has a total degree of substitution of acetyl groups of 2.27-2.56. The cellulose diacetate for a retardation film is characterized by having a degree of dispersion (Mw/Mn) of more than 3.0 but 7.5 or less, a degree of substitution at the 6-position of 0.65-0.85, a half width of the distribution of the degree of acetylation of 1.0-2.3 and a viscosity average degree of polymerization of 182-213 (inclusive). It is preferable for the cellulose diacetate for a retardation film to have a 6% viscosity of 120-230 mPa·s and a weight average molecular weight (Mw) of 205,000-235,000 (inclusive).
Inventors:
SHIMAMOTO SHU (JP)
ASUMI YUYA (JP)
ASUMI YUYA (JP)
Application Number:
PCT/JP2011/051058
Publication Date:
August 04, 2011
Filing Date:
January 21, 2011
Export Citation:
Assignee:
DAICEL CHEM (JP)
SHIMAMOTO SHU (JP)
ASUMI YUYA (JP)
SHIMAMOTO SHU (JP)
ASUMI YUYA (JP)
International Classes:
G02B5/30; C08B3/06; G02F1/13363
Foreign References:
| JP2000137116A | 2000-05-16 | |||
| JP2002062430A | 2002-02-28 | |||
| JP2002212338A | 2002-07-31 | |||
| JP2004323746A | 2004-11-18 | |||
| JP2009155555A | 2009-07-16 | |||
| JP2000137116A | 2000-05-16 | |||
| JP2002062430A | 2002-02-28 | |||
| JP2005040999A | 2005-02-17 | |||
| JP2002212338A | 2002-07-31 | |||
| JP2005181683A | 2005-07-07 | |||
| JP2004339348A | 2004-12-02 | |||
| JP2004323746A | 2004-11-18 | |||
| JP2004170760A | 2004-06-17 | |||
| JP2009155555A | 2009-07-16 | |||
| JP2003201301A | 2003-07-18 | |||
| JPH0977801A | 1997-03-25 |
Other References:
See also references of EP 2472296A4
UDA ET AL.: "Wood Chemistry", 1968, KYORITSU SHUPPAN CO., LTD., pages: 180 - 190
MOTOI WADANO: "Acetate Fiber", 5 May 1953, MARUZEN CO., LTD.
KAZUO UDA; HIDEO SAITO, JOURNAL OF THE SOCIETY OF FIBER SCIENCE AND TECHNOLOGY, vol. 18, no. 1, 1962, pages 105 - 120
UDA ET AL.: "Wood Chemistry", 1968, KYORITSU SHUPPAN CO., LTD., pages: 180 - 190
MOTOI WADANO: "Acetate Fiber", 5 May 1953, MARUZEN CO., LTD.
KAZUO UDA; HIDEO SAITO, JOURNAL OF THE SOCIETY OF FIBER SCIENCE AND TECHNOLOGY, vol. 18, no. 1, 1962, pages 105 - 120
Attorney, Agent or Firm:
GOTO, YUKIHISA (JP)
Yukihisa Goto (JP)
Yukihisa Goto (JP)
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Claims:
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