Composition for LC alignment film using diamine having...

Details Composition for LC alignment film using diamine having... Composition for LC alignment film using diamine having...

2005-09-01

2008-08-05

Truong, Duc (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Nitrogen-containing reactant

C528S422000, C528S310000, C428S001100

Reexamination Certificate

active

07408020

ABSTRACT:
Disclosed herein is an LC aligning agent using diamine having dendron side chains. In detail, the present invention relates to a composition for an LC alignment film which employs diamine having dendron side chains to produce polyamic acid, followed by imidization. When the LC alignment film is applied to a liquid crystal display device, high heat resistance, high penetration in a visible ray range, excellent alignment, and a high voltage holding ratio are assured. Even though it contains a small amount of functional diamine, a high pretilt angle can be assured. Thus, the pretilt angle is easily controlled and a vertical aligning force is improved.

REFERENCES:
patent: 5420233 (1995-05-01), Isogai et al.
patent: 7307139 (2007-12-01), Oh et al.
patent: 6-136122 (1994-05-01), None
patent: 11-84391 (1999-03-01), None

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