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Resin composition for display substrate
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A technology of resin composition and display, applied in the direction of instruments, coatings, optics, etc., can solve the problems of lack of versatility, low linear expansion characteristics, and expensive products
Active Publication Date: 2018-03-23
NISSAN CHEM CORP
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However, in the case of most polyimide systems, the linear expansion coefficient of the film is in the range of 60 to 80 ppm / K, and does not have low linear expansion characteristics.
Among them, although a polyimide film with a low coefficient of linear expansion has been developed, the resulting product is expensive because an acid dianhydride, which is not versatile, is used as a raw material (Patent Document 3)
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[0194] Examples are given below to describe the present invention more specifically, but the present invention is not limited to the following examples.
[0195] [Abbreviated symbols used in Examples]
[0196] The meanings of the abbreviations used in the following examples are as follows.
[0197]
[0198] BP-TME: 4,4'-biphenyl bis(trimellitic acid monoester anhydride) (manufactured by Honshu Chemical Industry Co., Ltd.) (the following formula (11))
[0199] [chemical 17]
[0200]
[0201] TAHQ: p-phenylene bis(trimellitic acid monoester anhydride) (manufactured by Manac Co., Ltd.) (the following formula (12))
[0202] [chemical 18]
[0203]
[0204]
[0205] PDA: p-phenylenediamine (manufactured by Tokyo Chemical Industry Co., Ltd.)
[0206] APABI: 2-(3-aminophenyl)-5-aminobenzimidazole (manufactured by Changzhou Sunlight Pharmaceutical Co., Ltd.)
[0207] BABP: 4,4'-bis(3-aminophenoxy)benzophenone (produced by Changzhou Sunlight Pharmaceutical Co., Ltd.)
[02...
Synthetic example P1
[0215]
[0216] Dissolve 1.66g of PDA (0.015 mol) and 0.862g of APABI (0.004 mol) in 70g of NMP, add 10.1g of BP-TME (0.019 mol), then add 7.4g of NMP again, and bring it to 23°C under a nitrogen atmosphere React for 24 hours. The Mw of the obtained polymer was 134000, and the molecular weight distribution was 2.8.
Synthetic example P2
[0217]
[0218] Dissolve 1.82g of PDA (0.017 mol) and 0.42g of APABI (0.002 mol) in 80g of NMP, add 9.77g of BP-TME (0.018 mol), then add 8g of NMP again, and react at 23°C under a nitrogen atmosphere 24 hours. The Mw of the obtained polymer was 138600, and the molecular weight distribution was 2.3.
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Abstract
[Problem] To provide a resin composition for display substrates which is capable of forming a useful polyimide film with an appropriate linear expansion coefficient and an appropriate flexibility. [Solution] This resin composition for display substrates contains a polyamic acid which includes a structural unit represented by formula (1) and a structural unit represented by formula (3), or a polyimide which includes a structural unit represented by formula (2) and a structural unit represented by formula (4). [In formulae 1 through 4, X1 represents a tetravalent organic group having an aromatic group and two carbonyl groups, Y1 represents a divalent aromatic group or aliphatic group, Y2 represents a divalent aromatic group having two or more nitrogen atoms, and n and m represent natural numbers.]
Description
technical field [0001] The present invention relates to a resin composition for display substrates, specifically, a resin composition for display substrates capable of forming a useful polyimide film having a moderate linear expansion coefficient and moderate flexibility. Background technique [0002] Polyimide resins are widely used in the field of electrical and electronic materials because of their high heat resistance, flame retardancy, and excellent electrical insulation properties. Specifically, it is used as a film for base materials of flexible printed wiring boards and heat-resistant tapes, and as a resin varnish for insulating films and protective films of semiconductors. [0003] On the other hand, display devices such as organic EL (electroluminescence) displays and liquid crystal displays have been required only for high precision, but their applications are rapidly expanding to information equipment and the like. For example, flexible displays using plastic fi...
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