Retardation film, polarizing plate, liquid crystal display device, and compound

Patent metadata

Field	Value
Publication number	US-8936840-B2
Application number	US-201214003565-A
Country	US
Kind code	B2
Filing date	Mar 9, 2012
Priority date	Mar 10, 2011
Publication date	Jan 20, 2015
Grant date	Jan 20, 2015

Abstract

The purpose of the present invention is to provide a retardation film which has high retardation developability, good mechanical strength and good durability. This retardation film contains a cellulose derivative and at least one compound represented by general formula (1), wherein each of R 1 and R 2 independently represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; X1 represents a single bond, —NR 4 —, —O— or —S—; X 2 represents a single bond, —NR 5 —, —NR 5 —(C═O)—, —O— or —S—; each of R 4 and R 5 independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group; R 3 represents a substituent; n represents an integer of 0-4; and when n is 2 or more, a plurality of R 3 s may be the same or different and adjacent R 3 s may be joined together to form a ring).

First claim

The invention claimed is:

1. A retardation film comprising a cellulose derivative and at least one compound represented by general formula (2) or (3):

wherein
R 2 represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group;
X 1 represents a single bond, —NR 4 —, —O— or —S—;
X 2 represents a single bond, —NR 5 —, —NR 5 —(C═O)—, —O— or —S—;…

Assignees

• Suzuki Takatsugu
• Nakahara Issei
• Kiuchi Hiroyoshi
• Fukusaka Kiyoshi
• Konica Minolta Inc

Inventors

• Suzuki Takatsugu
• Nakahara Issei
• Kiuchi Hiroyoshi
• Fukusaka Kiyoshi

Classifications

• G02B1/04

  Physics · mapped topic

• C08K5/3465

  Chemistry & Metallurgy · mapped topic

• G02F1/133528 Primary

  Physics · mapped topic

• C08B3/16

  Chemistry & Metallurgy · mapped topic

• C08L1/10

  Chemistry & Metallurgy · mapped topic