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Resin composition, resin film, and liquid crystal display element

A resin composition and resin film technology, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, can solve problems such as the reduction of light utilization efficiency, and achieve the effects of inhibiting peeling and improving adhesion

Active Publication Date: 2020-03-31
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if a polarizer is used, the light utilization efficiency will decrease

Method used

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  • Resin composition, resin film, and liquid crystal display element
  • Resin composition, resin film, and liquid crystal display element
  • Resin composition, resin film, and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0156] Examples are listed below to illustrate the present invention in more detail, but are not limited to them. The abbreviations used in the following are as follows.

[0157]

[0158] L1: MLC-2003 (manufactured by Merck Ltd.)

[0159]

[0160]

[0161] R3: Blemmer TA-604AU (manufactured by NOF Corporation)

[0162]

[0163]

[0164]

[0165]

[0166]

[0167]

[0168]

[0169]

[0170]

[0171]

[0172]

[0173] E1: 3-methacryloxypropyl trimethoxysilane

[0174] E2: Tetraethoxysilane

[0175]

[0176]

[0177]

[0178]

[0179]

[0180] NMP: N-methyl-2-pyrrolidone, γ-BL: γ-butyrolactone

[0181] BCS: ethylene glycol monobutyl ether

[0182] PB: Propylene glycol monobutyl ether

[0183] PGME: Propylene glycol monomethyl ether

[0184] ECS: ethylene glycol monoethyl ether

[0185] EC: Diethylene glycol monoethyl ether

[0186] [Molecular weight measurement of polyimide polymer]

[0187] Using a normal temperature gel permeation chromatography (GPC) device (GPC-101) (manufactured by Showa De...

Synthetic example 1

[0199] D2 (3.06g, 12.2 mmol), A1 (4.10g, 15.5 mmol) and C1 (1.68g, 15.5 mmol) were mixed in NMP (33.2g) and reacted at 80°C for 4 hours, then D1 was added (3.60 g, 18.4 mmol) and NMP (16.6 g) were reacted at 40°C for 6 hours to obtain a polyamic acid solution (1) having a resin solid content concentration of 20% by mass. The number average molecular weight (also referred to as Mn) of this polyamic acid was 18,500, and the weight average molecular weight (also referred to as Mw) was 66,500.

Synthetic example 2

[0201] After adding NMP to the polyamic acid solution (1) (30.0 g) obtained by the method of Synthesis Example 1 and diluting to 6 mass%, acetic anhydride (3.60 g) and pyridine (2.30 g) as imidization catalysts were added, React at 60°C for 1.5 hours. This reaction solution was poured into methanol (450 ml), and the obtained precipitate was obtained by filtration. This deposit was washed with methanol, and dried under reduced pressure at 100°C to obtain polyimide powder (2). The imidation ratio of this polyimide was 51%, Mn was 16,100, and Mw was 43,500.

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Abstract

Provided is a resin composition for forming a novel resin film in a liquid crystal display element, whereby adhesion between a liquid crystal layer and an electrode can be increased, and peeling of the element, formation of bubbles, and degradation of optical characteristics can be suppressed for a long time and even in a harsh environment of exposure to light irradiation or high temperature and high humidity. A resin composition for forming a resin film in a liquid crystal display element having a liquid crystal layer obtained by irradiating with ultraviolet rays and curing a liquid crystal composition including a polymerizable compound and liquid crystal disposed between a pair of substrates provided with an electrode, the resin film being provided on a substrate provided with the electrode, in order to prevent contact between the electrode and the liquid crystal layer, the resin composition characterized by including a polymer having at least one type of structure selected from thegroup consisting of formula [1-a] through formula [1-i]. In the formulas, Xa represents a hydrogen atom or a benzene ring.

Description

Technical field [0001] The present invention relates to a resin composition for forming a resin film suitable for a transmissive liquid crystal display element that becomes a transmissive state when a voltage is applied. Background technique [0002] As a liquid crystal display element, a twisted nematic (TN, Twisted Nematic) mode has been put into practical use. For this mode, in order to utilize the optical rotation characteristics of liquid crystals and switch light, a polarizing plate is required. However, if a polarizing plate is used, the efficiency of light utilization decreases. [0003] As a liquid crystal display element that does not use a polarizing plate, there is an element that switches between the transmissive state (also referred to as the transparent state) and the scattering state of the liquid crystal. Specifically, a liquid crystal display element using polymer dispersed liquid crystal (PDLC:Polymer Dispersed Liquid Crystal) or polymer network liquid crystal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334C08G59/40C08G73/10C09K19/54G02F1/13G02F1/1333G02F1/1337C08F290/14C08G77/04
CPCC08F290/14C08G59/40C08G73/10C08G77/04C09K19/54G02F1/13G02F1/1333G02F1/1334G02F1/1337C08L79/08C08L83/04C08G73/1007
Inventor 保坂和义三木德俊桧森章吾
Owner NISSAN CHEM IND LTD
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