Liquid crystal aligning agent for vertical alignment,...

Details Liquid crystal aligning agent for vertical alignment,... Liquid crystal aligning agent for vertical alignment,...

2006-08-15

2006-08-15

Watkins, III, William P. (Department: 1772)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

Alignment layer of specified composition

C428S001250, C428S001260, C528S170000, C528S188000, C528S353000, C349S123000, C349S124000, C349S130000, C349S135000

Reexamination Certificate

active

07090900

ABSTRACT:
A liquid crystal alignment treating agent containing a polyamic acid which is represented by the following formula (I) and exhibits a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methyl-2-pyrrolidone at 30° C. at a concentration of 0.5 g/dl) or a polyimide obtained by cyclodehydration thereof:wherein R1represents a tetravalent organic group, at least 20 mol % of which has a fused alicyclic structure composed of two to five rings, and all of the carbonyl groups are directly bonded to the alicyclic structure and that any two carbonyl groups are not bonded to adjacent carbon atoms of the alicyclic structure; R2is a bivalent organic group, from 20 to 100 mol % of which has in the side-chain structure at least one structural unit selected from the group consisting of C5-20long-chain alkyl, C5-20fluoroalkyl, alicyclic structures and aromatic ring structures; and L is a positive integer.

REFERENCES:
patent: 5608033 (1997-03-01), Nihira et al.
patent: 5665856 (1997-09-01), Nihira et al.
patent: 5858274 (1999-01-01), Mishina et al.
patent: 5861534 (1999-01-01), Nihira et al.
patent: 5954999 (1999-09-01), Mishina et al.
patent: 6139917 (2000-10-01), Sano et al.
patent: 6294639 (2001-09-01), Sawahata et al.
patent: 6740371 (2004-05-01), Hosaka et al.
patent: 575986 (1993-12-01), None
patent: 1037092 (2000-09-01), None
patent: 8-328017 (1996-12-01), None
patent: 2000-63515 (2000-02-01), None
U.S. Appl. No. 10/494,511, filed May 13, 2004, Ono et al.
U.S. Appl. No. 10/398,746, filed Apr. 15, 2003, Mano et al.
U.S. Appl. No. 10/312,877, filed Jan. 2, 2003, Sawahata et al.
U.S. Appl. No. 10/479,972, filed Dec. 12, 2003, Yamada et al.

Affiliated with

Also associated with

Rating

Liquid crystal aligning agent for vertical alignment,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal aligning agent for vertical alignment,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal aligning agent for vertical alignment,... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3643907