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Title:
RETARDATION FILM
Document Type and Number:
Japanese Patent JP2008158088
Kind Code:
A
Abstract:

To provide a retardation film for extending a film making a principal component of a ring-like olefin-based additional copolymer exhibiting characteristics such as melting molding working, excellent transparency, heat resistance, low water absorption and a low dielectric constant.

The retardation film has: a structural unit (1) induced from a ring-like olefin-based compound having 4C alkyl group; and a structural unit (2) induced from a ring-like olefin-based compound having 5-12C alkyl group. The retardation film extends the film consisting of a ring-like olefin-based compound additional copolymer having a structural unit (3) induced from the other ring-like olefin-based compound at need. The retardation film consisting of the ring-like olefin-based additional copolymer has excellent transparency, heat resistance, low water absorption, dielectric constant, a small metal constant, excellent flexibility and toughness. The retardation film has high uniformity of retardation in the face of the film, hardly influences temperature and humidity of an environment by obtained retardation properties, has excellent elapse stability and excellent expression of the retardation.


Inventors:
Tsubouchi, Takashi
Imamura, Takashi
Sakagami, Toshiki
Application Number:
JP2006000344672
Publication Date:
July 10, 2008
Filing Date:
December 21, 2006
Export Citation:
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Assignee:
JSR CORP
International Classes:
G02B5/30; B29C55/02; C08F232/04; C08J5/18; B29K45/00; B29L7/00; B29L11/00
Domestic Patent References:
JP2003160620A
JP2002327024A
JP2004037543A
JP2002190383A
Attorney, Agent or Firm:
鈴木 俊一郎
牧村 浩次
高畑 ちより