申请人:Nippon Oil Corporation
公开号:EP2060937A1
公开(公告)日:2009-05-20
A retardation film, formed by stretching a film comprising a norbornene-based ring-opening polymer containing a structural unit (A) represented by the following general formula (1):
[in the formula (1), n represents an integer any one of 0 and 1, X1 represents any one of a group represented by a formula: -CH=CH- and a group represented by a formula: -CH2CH2-, R1, R2, R3, and R4, which may be the same or different, each represent any one of atoms and groups selected from the group consisting of: a hydrogen atom; halogen atoms; substituted or unsubstituted hydrocarbon groups, each of which may include at least one of linking group selected from the group consisting of an oxygen atom, a nitrogen atom, a sulfur atom, and a silicon atom, and which has a number of 1 to 30 carbon atoms; and polar groups, wavy lines a and b each represent a configuration of any one of an endo or an exo, and a wavy line c represents a configuration of any one of an endo or an exo.]; wherein a content percentage of a structural unit (A-1), in which the wavy line c represents an exo configuration, among the structural units (A) in a range from 35 mol% to 100 mol%.
一种缓凝薄膜,通过拉伸由降冰片烯基开环聚合物组成的薄膜形成,降冰片烯基开环聚合物含有由以下通式 (1) 表示的结构单元 (A):
[在式(1)中,n 代表 0 和 1 中的任一整数,X1 代表由式:-CH=CH-和由式表示的基团中的任一个:-R1、R2、R3 和 R4 可以相同或不同,各自代表选自以下组成的原子和基团中的任一个:氢原子;卤素原子;取代或未取代的烃基,其中每个烃基可包括至少一个选自由氧原子、氮原子、硫原子和硅原子组成的组的连接基团,其碳原子数为 1 至 30 个;以及极性基团,波浪线 a 和 b 分别代表内向或外向中任何一种构型,波浪线 c 代表内向或外向中任何一种构型。];其中,波浪线 c 代表外向型构型的结构单元 (A-1) 在结构单元 (A) 中的含量百分比范围为 35 摩尔%至 100 摩尔%。