Cholesteric liquid crystal additives
First Claim
Patent Images
1. A cholesteric liquid crystal composition comprising:
- a liquid crystalline polymer obtained from polymerization of a liquid crystal monomer of formula II; and
at least one non-liquid crystalline additive of formula I that comprises a substructure of the liquid crystal monomer of formula II;
wherein formula II is;
where M, N, and Q are each independently;
b and c are each independently zero or 1;
W, X, and V are each non-directionally and independently a covalent bond, —
C(═
O)—
O—
, —
C(═
O)—
S—
, —
C(═
O)—
Se—
, —
C(═
O)—
Te—
, —
(CH2)k—
where k is 1 to 8, —
(CH═
CH)—
, —
(C≡
C)—
, —
CH═
N—
, —
CH2—
O—
, —
C(═
O)—
, —
O—
, —
O—
C(═
O)—
O—
, or a combination thereof;
Y, Z, and U are each independently —
H, —
Cl, —
F, —
Br, —
I, —
OH, —
O(CH2)jCH3 where j is 0 to 8, —
CH3, —
CF3, —
OCF3, —
CN, —
NO2, aryl, arylalkoxy, carboxylic acid, thioether, or an amide;
e, and g are each independently zero, 1, 2, 3, or 4;
h is 1, 2, or 3; and
P is an acrylate, methacrylate, acrylamide, isocyanate, epoxy, silane or vinyl;
and wherein formula I is;
where M, N, and Q, W, X, and V, Y, Z, and U, b, c, e, f, and g, h, are as definedfor formula II andR is —
H, —
OH, —
CN, C1–
C8 alkyl, C1–
C8 alkoxy, an aryl group, an arylalkoxy group, a carboxylic acid group, a halogen, a thioether, or an amide.
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Abstract
The invention provides a cholesteric liquid crystal composition that includes at least one cholesteric liquid crystal precursor, and at least one non-liquid crystalline additive that is a non-liquid crystalline compound of formula I
The invention also provides cholesteric liquid crystal films and optical bodies formed from cholesteric liquid crystal compositions of the invention. The invention further provides an optical display that includes a display medium, and a reflective polarizer including a cholesteric liquid crystal composition in accordance with the invention.
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Citations
25 Claims
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1. A cholesteric liquid crystal composition comprising:
-
a liquid crystalline polymer obtained from polymerization of a liquid crystal monomer of formula II; and at least one non-liquid crystalline additive of formula I that comprises a substructure of the liquid crystal monomer of formula II; wherein formula II is;
where M, N, and Q are each independently;
b and c are each independently zero or 1; W, X, and V are each non-directionally and independently a covalent bond, —
C(═
O)—
O—
, —
C(═
O)—
S—
, —
C(═
O)—
Se—
, —
C(═
O)—
Te—
, —
(CH2)k—
where k is 1 to 8, —
(CH═
CH)—
, —
(C≡
C)—
, —
CH═
N—
, —
CH2—
O—
, —
C(═
O)—
, —
O—
, —
O—
C(═
O)—
O—
, or a combination thereof;Y, Z, and U are each independently —
H, —
Cl, —
F, —
Br, —
I, —
OH, —
O(CH2)jCH3 where j is 0 to 8, —
CH3, —
CF3, —
OCF3, —
CN, —
NO2, aryl, arylalkoxy, carboxylic acid, thioether, or an amide;e, and g are each independently zero, 1, 2, 3, or 4; h is 1, 2, or 3; and P is an acrylate, methacrylate, acrylamide, isocyanate, epoxy, silane or vinyl; and wherein formula I is;
where M, N, and Q, W, X, and V, Y, Z, and U, b, c, e, f, and g, h, are as defined for formula II and R is —
H, —
OH, —
CN, C1–
C8 alkyl, C1–
C8 alkoxy, an aryl group, an arylalkoxy group, a carboxylic acid group, a halogen, a thioether, or an amide.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A cholesteric liquid crystal composition comprising:
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a liquid crystalline polymer obtained from polymerization of a liquid crystal monomer of formula II; and at least one non-liquid crystalline additive of formula I that comprises a substructure of formula II; wherein formula II is;
where M, N, and Q each independently contain either phenyl or napthalene or biphenyl aromatic rings, b and c are each independently zero or 1; W, X, and V are each non-directionally and independently a covalent bond, —
C(═
O)—
O—
, —
C(═
O)—
S—
, —
C(═
O)—
Se—
, —
C(═
O)—
Te—
, —
(CH2)k—
where k is 1 to 8, —
(CH═
CH)—
, —
(C≡
C)—
, —
CH═
N—
, —
CH2—
O—
, —
C(═
O)—
, —
O—
, —
O—
C(═
O)—
O—
, or a combination thereof;Y, Z, and U are each independently —
H, —
Cl, —
F, —
Br, —
I, —
OH, —
O(CH2)jCH3 where j is 0 to 8, —
CH3, —
CF3, —
OCF3, —
CN, —
NO2, aryl, arylalkoxy, carboxylic acid, thioether, or an amide;e, f, and g are each independently zero, 1, 2, 3, or 4; h is 1, 2, or 3; and P is an acrylate, methacrylate, acrylamide, isocyanate, epoxy, silane or vinyl; and wherein formula I is;
where M, N, and Q, W, X, and V, Y, Z, and U, b, c, e, f, and g, h, are as defined for formula II and R is —
H, —
OH, —
CN, C1–
C8 alkyl, C1–
C8 alkoxy, an aryl group, an arylalkoxy group, a carboxylic acid group, a halogen, a thioether, or an amide.- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of making a cholesteric liquid crystal composition, comprising the steps of:
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(a) selecting at least one cholesteric liquid crystal precursor characterized by formula II;
(b) selecting at least one non-liquid crystalline additive comprising a substructure of the at least one cholesteric liquid crystal precursor, said non-liquid crystalline additive characterized by formula I;
where M, N, and Q are each independently;
b and c are each independently zero or 1; W, X, and V are each non-directionally and independently a covalent bond, —
C(═
O)—
O—
, —
C(═
O)—
S—
, —
C(═
O)—
Se—
, —
C(═
O)—
Te—
, —
(CH2)k—
where k is 1 to 8, —
(CH═
CH)—
, —
(C═
C)—
, —
CH═
N—
, —
CH2—
O—
, —
C(═
O)—
, —
O—
, —
O—
C(═
O)—
O—
, or a combination thereof;Y, Z, and U are each independently —
H, —
Cl, —
F, —
Br, —
I, —
OH, —
O(CH2)jCH3 where j is 0 to 8, —
CH3, —
CF3, —
OCF3, —
CN, —
NO2, aryl, arylalkoxy, carboxylic acid, thioether, or an amide;e, f, and g are each independently zero, 1, 2, 3, or 4; h is 1, 2, or 3; R is —
H, —
OH, —
CN, C1–
C8 alkyl, C1–
C8 alkoxy, an aryl group, an arylalkoxy group, a carboxylic acid group, a halogen, a thioether, or an amide; andP is an acrylate, methacrylate, acrylamide, isocyanate, epoxy, silane or vinyl; (c) combining the at least one cholesteric liquid crystal precursor with the at least one non-liquid crystalline additive to produce a cholesteric liquid crystal composition; (d) testing the cholesteric liquid crystal composition to determine its pass transmission and its extinction transmission; and (e) (i) selecting the cholesteric liquid crystal composition having a pass transmission that is greater than that of a film formed from the cholesteric liquid crystal composition without the non-liquid crystalline additive or an extinction transmission that is less than that of a film formed from the cholesteric liquid crystal composition without the non-liquid crystalline additive, or (ii) repeating steps (a) through (d) if the cholesteric liquid crystal composition has a pass transmission that is less than that of a film formed from the cholesteric liquid crystal composition without the non-liquid crystalline additive and an extinction transmission that is more than that of a film formed from the cholesteric liquid crystal composition without the non-liquid crystalline additive.
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Specification