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Laminated body, flexible device and method for manufacturing the laminated body

A laminated body and conditional technology, applied in the direction of chemical instruments and methods, instruments, optical components, etc., can solve the problems of poor impact resistance and achieve the effect of excellent bending resistance

Active Publication Date: 2022-01-18
TOKYO OHKA KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in recent years, from the viewpoint of reducing the weight of devices and achieving flexible devices such as bendable devices and foldable devices, organic films have been used as substrates. The technical development of devices is actively progressing, but there are still disadvantages such as poor impact resistance compared with conventional glass substrates

Method used

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  • Laminated body, flexible device and method for manufacturing the laminated body
  • Laminated body, flexible device and method for manufacturing the laminated body
  • Laminated body, flexible device and method for manufacturing the laminated body

Examples

Experimental program
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Effect test

preparation example Construction

[0453]

[0454] The method for preparing the polyimide precursor composition is not particularly limited. For example, it can be selected from the group consisting of various monomer components and polyamic acid described above as the polyimide precursor component. At least one of these, an organic solvent (S), an imidazole compound, and the above-mentioned other components used as necessary.

[0455] Both a monomer component and a polyamic acid can be mix|blended as a polyimide precursor component. Usually, it is sufficient to mix|blend only a monomer component or only a polyamic acid. It is preferable to synthesize|combine a ring-forming polymer when compounding a monomer component as a component from the point which can make polyamic acid high molecular weight in presence of an imidazole compound. In addition, it is preferable to mix a precursor polymer as a component from the viewpoint of improving the ring-closing efficiency of the ring-forming polymer in the presence ...

Embodiment

[0844] Hereinafter, although an Example is shown and this invention is demonstrated more concretely, the scope of the present invention is not limited to these Examples.

Synthetic example A

[0846]

[0847] In this Synthesis Example A, an imidazole compound (A1) having the following structure was synthesized.

[0848] [chemical formula 64]

[0849]

[0850] First, 30 g of a cinnamic acid derivative having a structure of the following formula was dissolved in 200 g of methanol, and then 7 g of potassium hydroxide was added to methanol. Next, the methanol solution was stirred at 40°C. Methanol was distilled off, and the residue was suspended in 200 g of water. 200 g of tetrahydrofuran was mixed and stirred in the obtained suspension, and the aqueous phase was liquid-separated. After adding 4 g of hydrochloric acid and stirring under ice-cooling, 100 g of ethyl acetate was mixed and stirred. After the mixture was left to stand, the oil phase was separated. Crystals of the target product were precipitated from the oil phase, and the precipitate was recovered to obtain the imidazole compound (A1) of the above structure.

[0851] [chemical formula 65]

[0852...

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Abstract

An object of the present invention is to provide a laminate excellent in impact resistance, bending resistance, etc., and useful as a member constituting a flexible device or the like, a flexible device having the laminate, and a method for manufacturing the laminate. The laminated body 100 of this invention is the laminated body 100 formed by laminating|stacking the polyimide layer 10 and the hard-coat layer 20 which consist of polyimide, and the said polyimide satisfies the following conditions. (1) The degree of yellowness is 5 or less, (2) The elongation at break measured by a tensile test according to JIS K7162 is 3% or more, and (3) The thermal expansion coefficient at the glass transition temperature or less is 20 ppm / K or less .

Description

technical field [0001] The present invention relates to a laminate, a flexible device and a method for manufacturing the laminate. Background technique [0002] Conventionally, as a substrate for a display included in a smartphone or the like, glass has been used in view of its high transparency and ease of availability. [0003] However, in recent years, from the viewpoint of reducing the weight of devices and achieving flexible devices such as bendable devices and foldable devices, organic films have been used as substrates. Technology development of devices is actively progressing, but compared with conventional glass substrates, there are still disadvantages such as poor impact resistance. [0004] For example, Patent Document 1 proposes a high-hardness foldable laminate in which a hard coat layer is formed on an organic film. [0005] In addition, Patent Document 2 discloses a laminate that is excellent in impact resistance and surface slipperiness and is suitable as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B1/14G02B1/10
CPCG02B1/10G02B1/14B32B7/022B32B27/281B32B27/08B32B27/18C08G73/1007C08K5/3445C08K5/54B32B27/308B32B27/283B32B2457/20
Inventor 野田国宏千坂博树盐田大小松伸一
Owner TOKYO OHKA KOGYO CO LTD