Reactive liquid crystal compounds

Details Reactive liquid crystal compounds Reactive liquid crystal compounds

2000-05-04

2002-02-05

Wu, Shean C. (Department: 1756)

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

C252S299670, C428S001100, C428S001500, C560S064000, C560S095000, C549S208000, C525S330300, C526S318440

Reexamination Certificate

active

06344154

ABSTRACT:

SUMMARY OF THE INVENTION
The invention relates to reactive liquid crystal compounds of formula I
wherein
P
is CH
2
═CW—COO—, WCH═CH—O—,
or CH
2
═CH-Phenyl-(O)
k
— with W being H, CH
3
or Cl and
k being 0 or 1,
Sp
is a spacer group having 1 to 20 C atoms,
X
is —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—,
—OCOO— or a single bond,
n
is 0 or 1,
A
1
and A
2
are each independently 1,4-phenylene in which, in
addition, one or more CH groups may be replaced by N,
1,4-cyclohexenylene or 1,4-cyclohexylene in which, in
addition, one or two non-adjacent CH
2
groups may be
replaced by O and/or S, or naphthalene-2,6-diyl, it being
possible for these rings to be substituted with halogen,
cyano or nitro groups or with one or more alkyl, alkoxy or
acyl groups with 1 to 7 C atoms wherein one or more H
atoms may be substituted by F or Cl,
Z
is —OCO—, —COO—, —CH
2
CH
2
—, —CH═CH—, —C≡C—, —CH
2
O—,
—OCH
2
—, or a single bond,
m
is 0 or 1, and
R
is an alkyl radical with up to 20 C atoms which may be
unsubstituted, mono- or polysubstituted by halogen or
CN, it being possible for one or more CH
2
groups to be
replaced by —O—, —S—, —NH—, N(CH
3
)-, —CO—, —OCO—,
—COO—, —S—CO—, —CO—S—, —O—COO— in such a manner that
oxygen atoms are not directly linked to one another, or
alternatively R is halogen, cyano or has independently
one of the meanings given for P-(Sp-X)
n
-.
The invention furthermore relates to compositions comprising at least two reactive liquid crystal compounds at least one of which is a compound of formula I as specified above.
Another aspect of the invention are linear or crosslinked (co)polymers obtainable by (co)polymerizing at least one reactive liquid crystal compound of formula I or a composition as described above.
Yet another aspect of the invention is the use of reactive liquid crystal compounds or compositions as described above for the preparation of linear or crosslinked polymers or polymer films for decorative pigments, cosmetics or security applications, active and passive optical elements, like e.g. optical polarizer or compensator films, colour filters, scattering displays, adhesives or synthetic resins with anisotropic mechanical properties.


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