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Liquid crystal composition and liquid crystal display element

A technology of liquid crystal compounds and compositions, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of insufficient reliability of liquid crystal display elements, and achieve the effects of excellent display quality, shortened ultraviolet irradiation time, and high VHR.

Pending Publication Date: 2020-06-16
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the display device using compound (A) and compound (B) as a polymerizable compound, although the remaining amount of the polymerizable compound is very small and the polymerization rate is relatively fast, the reliability of the liquid crystal display device after ultraviolet irradiation is not sufficient, etc. Improve the subject

Method used

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  • Liquid crystal composition and liquid crystal display element
  • Liquid crystal composition and liquid crystal display element
  • Liquid crystal composition and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0879] Examples are given below to describe the present invention in further detail, but the present invention is not limited to these examples. In addition, "%" in the composition of a following Example and a comparative example means "mass %". The following symbols are used for the description of the compounds in the Examples.

[0880] (side chain)

[0881] -n -C n h 2n+1 straight-chain alkyl group with carbon number n

[0882] n-C n h 2n+1 - Straight-chain alkyl group with carbon number n

[0883] -On -OC n h 2n+1 straight-chain alkoxyl with carbon number n

[0884] nO-C n h 2n+1 O- straight-chain alkoxy group with carbon number n

[0885] -V -CH=CH 2

[0886] V-CH 2 =CH-

[0887] -V- -CH=CH-

[0888] -O1V -O-CH 2 -V

[0889] -V1 -CH=CH-CH 3

[0890] 1V-CH 3 -CH=CH-

[0891] -2V -CH 2 -CH 2 -CH=CH 2

[0892] V2-CH 2 =CH-CH 2 -CH 2 -

[0893] -2V1 -CH 2 -CH 2 -CH=CH-CH 3

[0894] 1V2-CH 3 -CH=CH-CH 2 -CH 2 -

[0895] -F -F

[0896] -...

Embodiment 6～28

[0940] Using the prepared LC-001 to LC-007, LC-1-9 to LC-7-2 were prepared, vacuum injected into a test cell, and a liquid crystal display element was produced (Examples 5 to 28). Their VHR (UV) and residual amounts of polymerizable compounds were evaluated. The results are shown below.

[0941] [table 5]

[0942]

[0943] [Table 6]

[0944]

[0945] [Table 7]

[0946]

[0947] [Table 8]

[0948]

[0949] In Examples 6 to 28 using the polymerizable liquid crystal composition of the present invention, as in Examples 1 to 5, it was confirmed that the VHR after UV irradiation was very high, and that the reaction rate of the polymerizable compound was moderately fast.

Embodiment 29～40

[0951] Except having used the prepared LC-008 - LC-013, it carried out similarly, and carried out Examples 29-40, and evaluated VHR (UV) and the residual amount of a polymeric compound. The configuration and evaluation results of the polymerizable liquid crystal composition used are shown below.

[0952] [Table 9]

[0953]

[0954] [Table 10]

[0955]

[0956] In Examples 29 to 40 using the polymerizable liquid crystal composition of the present invention, as in Examples 1 to 5, it was confirmed that the VHR after UV irradiation was very high, and that the reaction rate of the polymerizable compound was moderately fast.

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Abstract

The present invention addresses the problem of providing: a polymerizable liquid crystal composition which satisfies various properties required for liquid crystal display elements such as high-speedresponse, high contrast, and low power consumption, can reduce a UV irradiation process time, and is useful for production of a PSA or PSVA liquid crystal display element having high reliability; anda liquid crystal display element using the polymerizable liquid crystal composition. Provided is a polymerizable liquid crystal composition which contains one or more liquid crystal compounds and oneor more polymerizable compounds represented by general formula (i): P<i1>-Sp<i1>-Ms<i1>-Sp<i2>-P<i2>, wherein the total contained amount of the polymerizable compounds is 0.4-10.0 mass% in the polymerizable liquid crystal composition containing the liquid crystal compounds and the polymerizable compounds. Also, provided is a liquid crystal display element using the polymerizable liquid crystal composition.

Description

technical field [0001] The present invention relates to a liquid crystal composition (polymerizable liquid crystal composition) containing a polymerizable compound, and a liquid crystal display device using the same. Background technique [0002] PSA (Polymer Sustained Alignment) liquid crystal display devices have a structure in which polymer structures are formed in cells to control the pretilt angle of liquid crystal molecules. , And continue to be developed as a liquid crystal display element. [0003] The manufacture of the PSA type liquid crystal display element is carried out as follows: a liquid crystal composition (polymerizable liquid crystal composition) containing a polymerizable compound is injected between the substrates, a voltage is applied to align the liquid crystal molecules, and ultraviolet rays are irradiated in this state to polymerize the polymerizable compound. The orientation of the liquid crystal molecules is fixed. At this time, if the unreacted ...

Claims

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Application Information

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IPC IPC(8): C09K19/54C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/38C09K19/42G02F1/1337
CPCC09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/38C09K19/42C09K19/54G02F1/1337
Inventor 后藤麻里奈井之上雄一杨焯
Owner DIC CORP
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