Polyimide resin polymer and liquid crystal alignment layer material containing the same

A polyimide resin and polymer technology, which is applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problems of high addition ratio, limited use, and increased production costs.

Active Publication Date: 2008-01-09
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited introduction of long-chain alkyl groups, the increase in the pretilt angle is limited, and the high addition ratio of diamine monomers increases the production cost.
In addition, in the Republic of China Patent Announcement No. 583426, it is disclosed to use a vertically ali...

Method used

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  • Polyimide resin polymer and liquid crystal alignment layer material containing the same
  • Polyimide resin polymer and liquid crystal alignment layer material containing the same
  • Polyimide resin polymer and liquid crystal alignment layer material containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] 1.34 grams (0.0025 moles) of 3,5-diamino-2-methylbenzoic acid cholesteryl ester, 5.13 grams (0.0475 moles) of p-phenylenediamine (PPDA), 1.94 grams (0.01 moles) of 1,2,4,5- Phthalic anhydride (PMDA), 8.1 grams (0.03 moles) of 3,3',4,4'-diphenyl dianhydride (BPDA) and 1.96 grams (0.01 moles) of cyclobutane tetracarboxylic dianhydride (CBDA), and After reacting 61.3 g of N-methyl-2-pyrrolone (NMP) at room temperature for 8-16 hours, add 326.9 g of NMP to dilute it to obtain a polyamic acid solution with a reduced viscosity of 0.2 dl / g. This solution is spin-coated on a glass substrate with a transparent electrode at 3000rpm, and heated at 200°C for 30 minutes to form a polyimide resin film. After cooling, it is assembled into a mutual Parallel direction liquid crystal cell, after pouring liquid crystal (model: ZLI-4792, manufactured by Merck), this element rotates between crossed Nicol crystals (crossed nicol), and presents a fully dark state, using the pretilt angle The...

Embodiment 2

[0078] 2.69 grams (0.005 moles) of 3,5-diamino-2-methylbenzoic acid cholesteryl ester, 4.94 grams (0.045 moles) of p-phenylenediamine, 0.97 grams (0.005 moles) of 1,2,4,5-phthalic anhydride , 8.1 grams (0.03 mole) 3,3 ', 4,4'-diphenyl dianhydride and 2.58 grams (0.015 mole) cyclobutane tetracarboxylic dianhydride, and 21.9 grams of N-methyl-2-pyrrolone ( NMP) reacted at room temperature for 4-12 hours, then added 73.1 g of NMP to dilute it to obtain a polyamic acid solution with a reduced viscosity of 0.8 dl / g. This solution is spin-coated on a glass substrate with a transparent electrode at 3000rpm, and heated at 200°C for 30 minutes to form a polyimide resin film. After cooling, it is assembled into a mutual Parallel direction liquid crystal cell, after pouring liquid crystal (model: ZLI-4792, manufactured by Merck), this element rotates between crossed Nicol crystals (crossed nicol), and presents a fully dark state, using the pretilt angle A measuring machine (Tilt Angle T...

Embodiment 3

[0080] 2.14 grams (0.004 moles) of 3,5-diamino-2-methylbenzoic acid cholesteryl ester, 1.72 grams (0.016 moles) of p-phenylenediamine, 1.55 grams (0.008 moles) of 1,2,4,5-phthalic anhydride and 3.24 grams (0.012 moles) of 3,3',4,4'-diphenyl dianhydride, and 24.4 grams of N-methyl-2-pyrrolidone (NMP) reacted at room temperature for 8 to 12 hours, then added Dilute it with 83.9 grams of NMP to obtain a polyamic acid solution with a reduced viscosity of 0.4dl / g. This solution is spin-coated on a glass substrate with a transparent electrode at 3000 rpm, and heated at 200°C for 30 minutes to form a polyimide resin film, which is assembled into a After filling the liquid crystal cell in parallel directions (model: ZLI-4792, manufactured by Merck), the element rotates between crossed Nicol crystals (crossed nicol) and presents a fully dark state. The value of the pretilt angle obtained by the Tilt Angle Tester (TBA) is 90.

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Abstract

A polyimide resin polymer contains at least repeated unit selected from (A-1) or (A-2) as polymerization unit, P1, P2, Q1 and Q2 are defined by the specifications. It can be used as coordination layer material for liquid-crystal display device.

Description

technical field [0001] The invention provides a polyimide polymer derived from a specific diamine structure, which can be used as a vertical alignment type liquid crystal alignment layer material, and can make liquid crystals have good vertical alignment and stability. Background technique [0002] Liquid crystal display is a display that utilizes the photoelectric changes of liquid crystals. It has attractive advantages such as small size, light weight, low power consumption, and good display quality. It has become the mainstream of flat-panel displays in recent years. [0003] In a liquid crystal display device, a typical liquid crystal element is a twisted nematic (TN) field effect type liquid crystal element using a nematic liquid crystal having a positive dielectric anisotropy. Generally speaking, liquid crystal molecules are placed between a pair of substrates containing electrodes. The alignment directions of the two substrates are perpendicular to each other, and the...

Claims

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Application Information

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IPC IPC(8): C08G73/10G02F1/139
Inventor 蔡明睿朱文崇张家文赖明智
Owner DAXIN MATERIALS
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