Liquid crystalline copolymer

Details Liquid crystalline copolymer Liquid crystalline copolymer

1996-02-22

1998-02-24

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 2522995, 25229967, 526318, 526319, C09K 1912, C09K 1952, C09K 1920, C08F 2200

Patent

active

057209006

ABSTRACT:
The invention relates to copolymers made from mono-reactive liquid and/or di-reactive liquid crystals which can be photopolymerized to form copolymers and to novel reactive liquid crystal compound having a nematic phase. Preferentially the reactive liquid crystal is polymerized while in the liquid crystal phase to produce an oriented birefringent polymer film. To do this, the reactive liquid crystal, in its nematic or smectic phase is aligned. (by well known techniques such as rubbed polyimide, etc.) and the thin film containing a small amount of photoinitiator, is subjected to ultraviolet light whereupon it polymerizes into a thin, aligned polymer film.

REFERENCES:
patent: 5188760 (1993-02-01), Hikmet et al.
patent: 5210630 (1993-05-01), Heynderickx et al.
patent: 5288425 (1994-02-01), Scherwosky et al.
patent: 5332520 (1994-07-01), Bach et al.
patent: 5352380 (1994-10-01), Scherowsky et al.
patent: 5385690 (1995-01-01), Finkelmann et al.
patent: 5401437 (1995-03-01), Im
patent: 5496497 (1996-03-01), Takiguchi et al.
patent: 5560864 (1996-10-01), Goulding et al.

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