Material for vertical aligning agent

Abstract

Disclosed is a material for a vertical aligning agent, and a molecular structure of the material is shown in formula (I):
R-L1P-L2.sub.nQ(I)
wherein Q is a polar anchor group, L1 is a rigid group, P is a polymerizable group, L2 is a linking group, R is a terminal flexible group, and n is in a range from 1 to 3. In the material, the polar anchor group is connected to the polymerizable group, which is beneficial to increase an aspect ratio of the material. Therefore, a fluid viscosity of the material can be reduced, and a diffusion effect of the material on a substrate can be improved.

Claims

1. A material for a vertical aligning agent, wherein a molecular formula of the material is
R-L1P-L2.sub.nQ ##STR00010##

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings provide further understandings of the present disclosure and constitute one part of the description. The drawings are used for interpreting the present disclosure together with the embodiments, not for limiting the present disclosure. In the drawings:

(2) FIG. 1 schematically shows a function of a material in a TFT-LCD device according to the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(3) The present disclosure will be illustrated in detail hereinafter in combination with examples, but the present invention is not limited to the following examples.

Synthesis Example 1

(4) A synthetic route of a first compound is shown as follows.

(5) ##STR00002##

(6) Preparation of an Intermediate Product c:

(7) At room temperature, 20.0 g (67.6 mmol) of a compound a was added to 600 ml of a THF solution, and they were mixed uniformly and cooled to 78 C. Then, 50 mL of n-hexane solution containing 75 mmol of N-butyl lithium was dropwise added thereto and stirred for 10 min. Next, 40 mL of THF solution containing 4 g of ethylene oxide was added thereto (system temperature was 2 C.). Next, 10 mL of trifluoroethyl ester at a temperature of 78 C. was dropwise added and stirred for 15 min. After separation and purification, 11 g of product c was obtained.

(8) Synthesis of a Compound e:

(9) 3 mmol of a compound c was added to 3 mmol of a compound d. After uniform mixing, a mixture thereof reacts for 1 h at 110 C. After completion of the reaction, a temperature of a reaction liquid was reduced to 70 C., and then 20 mL of n-hexane was added. The reaction continues for 3 h to obtain a product e after purification.

(10) H.sup.1-NMR data of the compound e are as follows: : 0.96 (3H), 1.33 (2H), 1.29 (2H), 1.62 (2H), 2.55 (2H), 7.18 (2H), 7.43 (2H), 7.25 (1H), 7.31 (1H), 7.52 (1H), 7.41 (2H), 7.25 (2H), 5.41 (2H), 2.15 (2H), 6.15 (6H), 5.58 (1H), 2.0 (1H).

(11) ##STR00003##

Synthesis Example 2

(12) Synthetic route of a second compound is shown as follows.

(13) ##STR00004##

(14) Preparation of an Intermediate Product c2:

(15) At room temperature, 20.0 g (67.6 mmol) of a compound a2 was added to 600 ml of a THF solution, and they were mixed uniformly and cooled to 78 C. Then, 50 mL of n-hexane solution containing 75 mmol of N-butyl lithium was dropwise added thereto and stirred for 10 min. Next, 40 mL of THF solution containing 4 g of ethylene oxide was added thereto (system temperature was 2 C.). Next, 10 mL of trifluoroethyl ester at a temperature of 78 C. was dropwise added and stirred for 15 min. After separation and purification, 11 g of product c2 was obtained.

(16) Synthesis of a Compound e2:

(17) 3 mmol of a compound c2 was added to 3 mmol of a compound d2. After uniform mixing, a mixture thereof reacts for 1 h at 110 C. After completion of the reaction, a temperature of a reaction liquid was reduced to 70 C., and then 20 mL of n-hexane was added. The reaction continues for 3 h to obtain a product e2 after purification.

(18) H.sup.1-NMR data of the compound e2 are as follows: : 0.96 (3H), 1.33 (2H), 1.29 (2H), 1.62 (2H), 2.55 (2H), 7.18 (2H), 7.43 (2H), 7.29 (2H), 7.45 (2H), 7.13 (2H), 5.88 (1H), 6.60 (1H), 2.90 (2H), 11.0 (1H).

(19) ##STR00005##

Embodiments 1 to 3 and Comparative Embodiment 1

(20) Self-aligning liquid crystal materials used in embodiments 1 to 3 mainly comprise a negative liquid crystal material, a material for a vertical aligning agent, and a polymerizable monomer, and a mass ratio of the three is 97%:22.5%:0.51%. The negative liquid crystal material is selected from conventional materials in the art. The polymerizable monomer is:

(21) ##STR00006##

(22) The material for the vertical aligning agent used herein is as shown in Table 1.

(23) TABLE-US-00001 TABLE 1 Molecular formula of the vertical aligning agent Embodiment 1 Embodiment 2 Embodiment 3

(24) A mixed self-aligning liquid crystal material is injected into an empty test panel without PI in vacuum.

(25) In comparative embodiment 1, the prior art is applied. First a PI alignment film is prepared, and then a liquid crystal material is injected.

(26) A comparison results in the embodiments and the comparative embodiment 1 is shown in Table 2.

(27) TABLE-US-00002 TABLE 2 Dark state effect Voltage holding ratio Embodiment 1 good 99% Embodiment 2 good 99% Embodiment 3 good 99% Comparative good 99% Embodiment 1

(28) Conditions for measuring a voltage holding ratio: voltage 1V, frequency 60 Hz, and temperature 60 C.

(29) It can be seen that, when the self-aligning material provided by the present disclosure is applied in an LCD device, an effect equivalent to that of the prior art can be achieved. In the present disclosure, a PI manufacturing procedure can be eliminated and manufacturing cost can be greatly reduced.

(30) The present disclosure is explained in detail in combination with some examples hereinabove, but the examples disclosed herein can be improved without departing from the protection scope of the present disclosure. The technical features disclosed in each and every embodiment of the present disclosure can be combined with one another in any way. In the present description, the situation of the combinations is not described exhaustively in consideration of brevity of length and conservation of resources. Hence, the present disclosure is not limited by the specific embodiments disclosed herein, but includes all technical solutions falling into the protection scope of the claims.

LIST OF REFERENCE NUMBERS

(31) 1Polar anchor group; 2Polymerizable group; 3Rigid group; 4Terminal flexible group; and 5Liquid crystal molecules.