TWI636090B - Sealant for organic electroluminescent display elements - Google Patents

Abstract

An object of the present invention is to provide a sealant for an organic electroluminescence display element which is capable of suppressing generation of outgas, and having excellent storage stability and coating properties.

The present invention relates to a sealant for an organic electroluminescence display device, comprising a cationically polymerizable compound and a cationic polymerization initiator, and the cationically polymerizable compound contains a compound represented by the following formula (1-1) and/or The compound represented by the formula (1-2), and the viscosity measured by the E-type viscometer at 25 ° C, 50 rpm is 50 ~ 250 mPa. s.

Description

Sealant for organic electroluminescent display elements

The present invention relates to a sealant for an organic electroluminescence display element which is capable of suppressing generation of outgas, and having excellent storage stability and coating properties.

In recent years, research on organic optical elements using organic thin film elements such as organic electroluminescence (organic EL) display elements or organic thin film solar cell elements has progressed. The organic thin film device can be easily produced by vacuum evaporation or solution coating, and is therefore excellent in productivity.

The organic EL display element has a film structure in which an organic light-emitting material layer is sandwiched between a pair of electrodes facing each other. Self-luminescence is performed by injecting electrons into one of the electrodes of the organic light-emitting material layer and injecting holes from the other electrode to bond the electrons and the holes in the organic light-emitting material layer. Compared with a liquid crystal display element or the like that requires a backlight device, it is excellent in visibility, can be further reduced in thickness, and can realize DC low-voltage driving.

In addition, such an organic EL display element has a problem that the light-emitting characteristics of the organic light-emitting material layer or the electrode are rapidly deteriorated when exposed to the outside atmosphere, and the lifetime is shortened. Therefore, in order to improve the stability and durability of the organic EL display element, it is indispensable for the organic EL display element to be a sealing technique for blocking the organic light-emitting material layer or the electrode from moisture or oxygen in the atmosphere.

Patent Document 1 discloses an upper surface light-emitting organic EL display element or the like. Among them, a method in which a photocurable adhesive is filled between the organic EL display element substrates and irradiated with light is used for sealing. However, such a conventional photocurable adhesive has a problem that upon the irradiation of light, outgas is generated to deteriorate the element, or the storage stability or the coatability is poor.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2001-357973

An object of the present invention is to provide a sealant for an organic electroluminescence display element which is capable of suppressing generation of outgas, and having excellent storage stability and coating properties.

The present invention relates to a sealant for an organic electroluminescence display device comprising a cationically polymerizable compound and a cationic polymerization initiator, and the cationically polymerizable compound contains a compound represented by the following formula (1-1) and/or The compound represented by the formula (1-2), and the viscosity measured by the E-type viscometer at 25 ° C, 50 rpm is 50 ~ 250 mPa. s.

Hereinafter, the present invention will be described in detail.

The present inventors have found that a sealing agent for an organic electroluminescence display element which is excellent in storage stability and coating property can be obtained by using a specific cationically polymerizable compound, and the present invention can be completed.

The sealing agent for an organic electroluminescence display device of the present invention contains a cationically polymerizable compound.

The cationically polymerizable compound contains the compound represented by the above formula (1-1) and/or the compound represented by the above formula (1-2). Hereinafter, the compound represented by the above formula (1-1) and the compound represented by the above formula (1-2) are also referred to as "the epoxy compound of the present invention". By containing the epoxy compound of the present invention, the sealing agent for an organic electroluminescence display device of the present invention can suppress generation of outgassing, and is excellent in storage stability and coating properties.

The cationically polymerizable compound may contain at least one of the compound represented by the above formula (1-1) and the compound represented by the above formula (1-2), but has an effect of suppressing outgassing and is stable in storage. From the viewpoint of the superiority of all aspects of the properties and the coating properties, it is preferred to contain both the compound represented by the above formula (1-1) and the compound represented by the above formula (1-2).

When the cationically polymerizable compound contains both the compound represented by the above formula (1-1) and the compound represented by the above formula (1-2), the compound represented by the above formula (1-1) and the above formula The content ratio of the compound represented by the formula (1-2) is preferably a compound represented by the above formula (1-1): a compound represented by the above formula (1-2) = 9:1 to 1:4. When the content ratio of the compound represented by the above formula (1-1) to the compound represented by the above formula (1-2) is within this range, the effect of suppressing outgassing, storage stability, and coatability can be achieved. All aspects are better.

As a commercial item among the compounds represented by the above formula (1-1), Celloxide 8000 (manufactured by Daicel Corporation), which is commercially available as a compound represented by the above formula (1-2), includes Celloxide 2021P (manufactured by Daicel Corporation).

The sealing agent for organic electroluminescent display elements of the present invention can also prevent this In the range of the object of the invention, other cationically polymerizable compound such as a bisphenol A type epoxy resin or a bisphenol F type epoxy resin is contained as the above cationically polymerizable compound, but in terms of coatability or suppression of outgassing, It does not contain other cationically polymerizable compounds.

Cationic polymerization in the case of containing the above other cationically polymerizable compound A preferred lower limit of the content of the epoxy compound of the present invention in 100 parts by weight of the whole of the compound is 60 parts by weight. When the content of the epoxy compound of the present invention is less than 60 parts by weight, the coating property may be deteriorated or the effect of suppressing outgassing may not be sufficiently exhibited. A more preferred lower limit of the content of the epoxy compound of the present invention is 70 parts by weight.

The sealing agent for organic electroluminescent display elements of the present invention contains cationic polymerization Starting agent.

Examples of the cationic polymerization initiator include a thermal cationic polymerization initiator which generates a proton acid or a Lewis acid by heating, or a photocationic polymerization initiator which generates a proton acid or a Lewis acid by irradiation with light. It can be either an ionic acid or a nonionic acid.

Among them, a thermal cationic polymerization initiator is preferably contained.

The above thermal cationic polymerization initiator is preferably BF ₄ ^- , PF ₆ ^- , SbF ₆ ^- or (BX ₄ ) ^- (wherein X represents at least 2 or more fluorine or trifluoromethyl substituted Phenyl) is a phosphonium salt, a phosphonium salt, a quaternary ammonium salt, a diazonium salt or a phosphonium salt as a relatively anion, more preferably a phosphonium salt.

Examples of the above sulfonium salt include triphenylsulfonium tetrafluoride, triphenylsulfonium hexafluoride, triphenylsulfonium hexafluoride, and tris(4-methoxyphenyl)phosphonium hexafluoride. Diphenyl (4-benzene sulfur) Phenyl phenyl) arsenic hexafluoride.

Examples of the onium salt include ethyltriphenylphosphonium hexafluoride, tetrabutylphosphonium hexafluoride, and the like.

Examples of the above quaternary ammonium salt include dimethylphenyl (4-methoxybenzyl) ammonium hexafluorophosphate and dimethylphenyl (4-methoxybenzyl) ammonium hexafluoroantimonic acid. Salt, dimethylphenyl (4-methoxybenzyl) ammonium tetrakis(pentafluorophenyl)borate, dimethylphenyl (4-methylbenzyl) ammonium hexafluorophosphate, dimethylbenzene (4-methylbenzyl)ammonium hexafluoroantimonate, dimethylphenyl (4-methylbenzyl) ammonium hexafluorotetrakis(pentafluorophenyl)borate, methylphenyl dibenzylammonium , methylphenyldibenzylammonium hexafluoroantimonate, methylphenyldibenzylammonium tetrakis(pentafluorophenyl)borate, phenyltribenzylammonium tetrakis(pentafluorophenyl)borate, two Methylphenyl (3,4-dimethylbenzyl) ammonium tetrakis(pentafluorophenyl)borate, N,N-dimethyl-N-benzylphenylammonium hexafluoride, N,N-di N,N-dimethyl-benzyl-N-pyridinium antimony hexafluoride, N, N, N-methyl-benzyl-N-pyridinium antimony hexafluoride N-N-diethyl-N-benzyl-pyridinium trifluoromethane sulfonate or the like.

As a commercial one of the above-mentioned thermal cationic polymerization initiators, for example, San -Aid SI-60, San-Aid SI-80, San-Aid SI-B3, San-Aid SI-B3A, San-Aid SI-B4 (all manufactured by Sanxin Chemical Industry Co., Ltd.), CXC1612, CXC1738, CXC1821 ( All are manufactured by King Industries).

As the ionic photoacid generation type in the photocationic polymerization initiator, for example, the anion moiety contains BF ₄ ^- , PF ₆ ^- , SbF ₆ ^- , or (BX ₄ ) ^- (wherein X represents at least An aromatic sulfonium salt, an aromatic sulfonium salt, an aromatic diazonium salt, an aromatic ammonium salt or a (2,4-cyclopentadien-1-yl group) of two or more fluorine or trifluoromethyl-substituted phenyl groups ((1-methylethyl)benzene)-iron salt and the like.

Examples of the above aromatic onium salt include bis(4-(diphenylfluorenyl)benzene. Thiophene bishexafluorophosphate, bis(4-(diphenylfluorenyl)phenyl) sulfide dihexafluoroantimonate, bis(4-(diphenylfluorenyl)phenyl) sulfide Tetrafluoroborate, bis(4-(diphenylfluorenyl)phenyl) sulfide tetrakis(pentafluorophenyl)borate, diphenyl-4-(phenylthio)phenylphosphonium hexafluorophosphate, Diphenyl-4-(phenylthio)phenylphosphonium hexafluoroantimonate, diphenyl-4-(phenylthio)phenylphosphonium tetrafluoroborate, diphenyl-4-(phenylthio) Phenylphosphonium tetrakis(pentafluorophenyl)borate, triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrafluoroborate, triphenylsulfonium tetrakis(pentafluorobenzene) Borate, bis(4-(bis(4-(2-hydroxyethoxy))phenyl) phenyl) thioether bis hexafluorophosphate, bis (4-(di(4-(2) -hydroxyethoxy))phenylindenyl)phenyl)thiophene bishexafluoroantimonate, bis(4-(bis(4-(2-hydroxyethoxy))phenyl)phenyl)phenyl) Thioether bistetrafluoroborate, bis(4-(di(4-(2-hydroxyethoxy))phenyl) phenyl) thio) tetrakis(pentafluorophenyl)borate, and the like.

Examples of the aromatic onium salt include diphenylphosphonium hexafluorophosphate. Diphenylphosphonium hexafluoroantimonate, diphenylphosphonium tetrafluoroborate, diphenylphosphonium tetrakis(pentafluorophenyl)borate, bis(dodecylphenyl)phosphonium hexafluorophosphate, double Dodecylphenyl)phosphonium hexafluoroantimonate, bis(dodecylphenyl)phosphonium tetrafluoroborate, bis(dodecylphenyl)phosphonium tetrakis(pentafluorophenyl)borate, 4 -methylphenyl-4-(1-methylethyl)phenylphosphonium hexafluorophosphate, 4-methylphenyl-4-(1-methylethyl)phenylphosphonium hexafluoroantimonate, 4-methylphenyl-4-(1-methylethyl)phenylhydrazine tetrafluoroborate, 4-methylphenyl-4-(1-methylethyl)phenylphosphonium tetrakis(pentafluorobenzene) Base) borate and the like.

Examples of the above aromatic diazonium salt include phenyldiazonium hexafluorophosphate. Salt, phenyldiazonium hexafluoroantimonate, phenyldiazonium tetrafluoroborate, phenyldiazonium tetrakis(pentafluorophenyl)borate, and the like.

Examples of the above aromatic ammonium salt include 1-benzyl-2-cyanopyridine. 1-benzyl-2-cyano-pyridinium hexafluorophosphate, 1-benzyl-2-cyano-pyridinium hexafluoroantimonate, 1-benzyl 1-benzyl-2-cyano-pyridinium tetrafluoroborate, 1-benzyl-2-cyanopyridinium tetrakis(pentafluorophenyl)borate (1-benzyl-) 2-cyano-pyridinium tetrakis(pentafluorophenyl)borate), 1-(naphthylmethyl)-2-cyano-pyridinium hexafluorophosphate, 1-(naphthalene) 1-(naphthylmethyl)-2-cyano-pyridinium hexafluoroantimonate, 1-(naphthylmethyl)-2-cyanopyridinium tetrafluoroborate (1-(naphthylmethyl)2-cyano-pyridinium tetrafluoroborate), 1-(naphthylmethyl)-2-cyanopyridinium tetrakis(pentafluorophenyl)borate (1-(naphthylmethyl)-2-cyanopyridinium tetrakis ( Pentafluorophenyl)borate).

As the above (2,4-cyclopentadien-1-yl)((1-methylethyl)benzene)-iron The salt may, for example, be (2,4-cyclopentadien-1-yl)((1-methylethyl)benzene)-iron (II) hexafluorophosphate or (2,4-cyclopentadiene). -1-yl)((1-methylethyl)benzene)-iron(II) hexafluoroantimonate, (2,4-cyclopentadien-1-yl)((1-methylethyl) Benzene)-iron(II)tetrafluoroborate, (2,4-cyclopentadien-1-yl)((1-methylethyl)benzene)-iron(II)tetrakis(pentafluorophenyl)borate Salt and so on.

As a nonionic photoacid generating type in the above photocationic polymerization initiator Examples thereof include a nitrobenzyl ester, a sulfonic acid derivative, a phosphate ester, a phenolsulfonate, a diazonaphthoquinone, and an N-hydroxy sulfenium sulfonate.

As a commercially available one of the above photocationic polymerization initiators, for example, DTS-200 (manufactured by Midori Chemical Co., Ltd.), UVI6990, UVI6974 (all manufactured by Union Carbide), SP-150, SP-170 (all manufactured by Aidike), FC-508, FC-512 (both 3M) Manufactured by the company, IRGACURE 290 (manufactured by BASF Corporation), PI2074 (manufactured by Rhodia Co., Ltd.), etc.

Regarding the above thermal cationic polymerization initiator and the above photocationic polymerization initiator Both of them can be used as the above-mentioned thermal cationic polymerization initiator, and can also be used as the above photocationic polymerization initiator.

Regarding the content of the above cationic polymerization initiator, relative to the above cationic polymerization The lower limit of the compound is 100 parts by weight, preferably 0.01 part by weight, and the upper limit is preferably 10 parts by weight. When the content of the cationic polymerization initiator is less than 0.01 parts by weight, sufficient curability may not be imparted to the obtained sealing agent for an organic electroluminescence display device. When the content of the cationic polymerization initiator is more than 10 parts by weight, the storage stability of the obtained sealant for an organic electroluminescence display device may be insufficient, or the obtained sealant for an organic electroluminescent display element may be obtained. The moisture resistance of the cured product is deteriorated. A more preferred lower limit of the content of the above cationic polymerization initiator is 0.05 parts by weight, and a more preferred upper limit is 5 parts by weight.

The sealing agent for organic electroluminescent display elements of the present invention preferably contains a stable Agent. The sealant for an organic electroluminescence display device of the present invention is more excellent in storage stability by containing the above stabilizer.

Examples of the stabilizer include an amine compound such as benzylamine or an aminophenol. Type epoxy resin, etc.

Regarding the content of the above stabilizer, relative to the above cationically polymerizable compound A preferred lower limit is 100 parts by weight, preferably 0.001 part by weight, and a preferred upper limit is 2 parts by weight. If the above is stable When the content of the agent is less than 0.001 part by weight, the effect of improving the storage stability of the obtained sealant for an organic electroluminescence display device may not be sufficiently exhibited. When the content of the above stabilizer is more than 2 parts by weight, there is a case where the curing by the cation is hindered. A more preferred lower limit of the content of the above stabilizer is 0.05 parts by weight, and a still more preferred upper limit is 1 part by weight.

The sealing agent for an organic electroluminescence display element of the present invention may also contain a decane couple mixture. The decane coupling agent has an effect of improving the adhesion between the sealing agent for an organic electroluminescence display device of the present invention and a substrate.

As the above decane coupling agent, for example, 3-aminopropyltrimethoxy group can be mentioned. Decane, 3-mercaptopropyltrimethoxydecane, 3-glycidoxypropyltrimethoxydecane, 3-isocyanatepropyltrimethoxydecane, and the like. These decane coupling agents may be used singly or in combination of two or more.

Regarding the content of the above decane coupling agent, the above-mentioned cationic polymerization compound The content is preferably 100 parts by weight, preferably 0.1 part by weight, and preferably 10 parts by weight. When the content of the above-mentioned decane coupling agent is less than 0.1 part by weight, the effect of improving the adhesion of the obtained sealing agent for an organic electroluminescence display element can not be sufficiently exhibited. When the content of the above decane coupling agent exceeds 10 parts by weight, the remaining decane coupling agent may bleed out. A more preferred lower limit of the content of the above decane coupling agent is 0.5 part by weight, and a more preferred upper limit is 5 parts by weight.

The sealing agent for organic electroluminescent display elements of the present invention can also prevent this A heat hardener is included in the scope of the object of the invention.

Examples of the above-mentioned thermosetting agent include an anthracene compound, an imidazole derivative, an acid anhydride, dicyandiamide, an anthracene derivative, a modified aliphatic polyamine, and an addition product of various amines and an epoxy resin.

As the above hydrazine compound, for example, 1,3-bis[mercaptocarboethyl-5-isopropyl group can be mentioned. B-urea urea] and so on.

Examples of the above imidazole derivative include 1-cyanoethyl-2-phenylimidazole, N-[2-(2-methyl-1-imidazolyl)ethyl]urea, and 2,4-diamino group. -6-[2'-methylimidazolyl-(1')]-ethyl-symmetric three , N,N'-bis(2-methyl-1-imidazolylethyl)urea, N,N'-(2-methyl-1-imidazolylethyl)-hexanediamine, 2-phenyl 4-methyl-5-hydroxymethylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, and the like.

Examples of the acid anhydride include tetrahydrophthalic anhydride and ethylene glycol bisanhydrotrimellitate.

These thermosetting agents may be used singly or in combination of two or more.

The sealant for an organic electroluminescence display element of the present invention may contain a surface modifier in a range that does not impair the object of the present invention. By including the surface modifying agent, the flatness of the coating film of the sealing agent for an organic electroluminescence display device of the present invention can be improved.

Examples of the surface modifier include a surfactant, a leveling agent, and the like.

The surfactant or the leveling agent may, for example, be a surfactant such as a polyfluorene-based, acrylic or fluorine-based surfactant or a leveling agent.

For example, BYK-302, BYK-331 (all manufactured by BYK-Chemie Japan Co., Ltd.), UVX-272 (manufactured by Nanmoto Chemical Co., Ltd.), and Surflon S can be cited as the above-mentioned surfactant or the above-mentioned leveling agent. -611 (manufactured by AGC Seimi Chemical Co., Ltd.) and the like.

The sealing agent for an organic electroluminescence display element of the present invention may contain a compound or an ion exchange resin in order to improve the durability of the element electrode, without impairing the object of the present invention, and the compound or ion exchange resin may be present. The electromechanical excitation light display element is reacted with an acid generated in the sealant.

As a compound which reacts with the acid produced above, it can mention that it neutralizes with an acid. A substance such as an alkali metal carbonate or hydrogencarbonate, or an alkaline earth metal carbonate or hydrogencarbonate. Specifically, for example, calcium carbonate, calcium hydrogencarbonate, sodium carbonate, sodium hydrogencarbonate or the like can be used.

As the above ion exchange resin, cation exchange type and anion exchange can be used. Any of the types and zwitterionic exchange types is particularly preferably a cation exchange type or a zwitterionic exchange type which can adsorb chloride ions.

Moreover, the sealant for an organic electroluminescence display element of the present invention can also be prevented Within the scope of the object of the present invention, various known additives such as a hardening retarder, a reinforcing agent, a softening agent, a plasticizer, a viscosity adjusting agent, an ultraviolet absorber, and an antioxidant are contained as needed.

As a sealing agent for producing the organic electroluminescent display element of the present invention For example, a method such as a homogeneous phase disperser, a homomixer, a universal mixer, a planetary mixer, a kneader, or a three-roll mill may be used, and a cationically polymerizable compound, a cationic polymerization initiator, and optionally Additives such as a decane coupling agent are added and mixed.

E-type viscosity of the sealant for organic electroluminescent display elements of the present invention The lower limit of the overall viscosity measured at 25 ° C, 50 rpm is 50 mPa. s, the upper limit is 250mPa. s. If the above viscosity is less than 50mPa. s, the sealant for an organic electroluminescence display element obtained is deteriorated in coatability, or composition unevenness occurs, and the cured product is deteriorated in transparency. If the above viscosity exceeds 250mPa. s, the obtained sealant for an organic electroluminescence display element deteriorates in coatability. The above viscosity is preferably 70 mPa. Above s, less than 100mPa. s.

According to the present invention, it is possible to provide a method for suppressing the generation of outgas, storage stability and A sealant for an organic electroluminescence display element excellent in coatability.

Hereinafter, the present invention will be described in more detail by explaining the examples, but the present invention is not limited to the examples.

(Example 1)

50 parts by weight of a compound represented by the above formula (1-1) ("Celloxide 8000" manufactured by Daicel Co., Ltd.) and a compound represented by the above formula (1-2) (manufactured by Daicel Corporation), which is a cationically polymerizable compound, 50 parts by weight of "Celloxide 2021P" and 0.5 parts by weight of an oxime-based initiator ("CXC1612" manufactured by King Industries Co., Ltd.) as a thermal cationic polymerization initiator, using a stirring mixer (manufactured by Thinky, "AR-250" The mixture was uniformly stirred and mixed at a stirring speed of 3000 rpm to prepare a sealant for an organic electroluminescence display element.

(Examples 2 to 10, Comparative Examples 1 to 9)

Each of the materials described in Tables 1 and 2 was stirred and mixed in the same manner as in Example 1 in accordance with the blending ratios shown in Table 1, and the organic electroluminescent display elements of Examples 2 to 10 and Comparative Examples 1 to 9 were produced. Use a sealant.

<evaluation>

The following evaluations were performed for each of the sealants for an organic electroluminescence display element obtained in the examples and the comparative examples. The results are shown in Tables 1 and 2.

(1) Viscosity

For each of the sealants for organic electroluminescent display elements obtained in the examples and the comparative examples, an E-type viscometer ("VISCOMETER TV-22" manufactured by Toki Sangyo Co., Ltd.) was used, and the conditions were measured at 25 ° C and 50 rpm. Viscosity.

(2) Coating properties

0.1 mL of each of the organic electroluminescent display elements obtained in the examples and the comparative examples was applied onto a glass substrate using a pipette, and the diameter obtained by the expansion was measured after 1 minute. When the diameter is 15 mm or more, it is set to "◎", and if it is 12 mm or more, if it is less than 15 mm, it is set to "○", and if it is 10 mm or more, if it is less than 12 mm, it is set to "△", and it is less than 10 mm. The coating property was evaluated by setting it to "x".

(3) preservation stability

For each of the sealants for organic electroluminescence display elements obtained in the examples and the comparative examples, the initial viscosity immediately after the production and the viscosity at 25 ° C for one week were measured, and the samples were stored at 25 ° C for one week. The viscosity)/(initial viscosity) is set as the viscosity change rate, and the viscosity change rate is less than 150%, and is set to "◎", and 150% or more, and less than 200% is set to "○", which is 200% or more. When the number is less than 400%, it is set to "△", and when it is more than 400%, it is set to "X", and the storage stability is evaluated.

In addition, the viscosity of the sealant for the organic electroluminescence display element was measured at 25 ° C and 50 rpm using an E-type viscometer ("VISCOMETER TV-22" manufactured by Toki Sangyo Co., Ltd.).

(4) Anti-gassing

Each of the organic electric powers obtained in Examples 1 to 7 and Comparative Examples 1 to 9 was measured after 300 mg of each of the sealants for organic electroluminescent display elements obtained in the examples and the comparative examples was sealed in a vial. The sealing agent for the light-emitting display element was cured by heating at 100 ° C for 30 minutes. For each of the sealants for organic electroluminescent display elements obtained in Examples 8 to 10, an ultraviolet irradiation device (Oak) was used. The company's "JL-4300-3S" was irradiated with ultraviolet rays at 1500 mJ/cm ² and then cured by heating at 80 ° C for 30 minutes. Further, the vial was heated in a constant temperature oven at 85 ° C for 100 hours, and the gasification component in the vial was measured using a gas chromatography mass spectrometer ("JMS-Q1050", manufactured by JEOL Ltd.). .

When the amount of the gasification component is less than 30 ppm, it is set to "?", and when it is 30 ppm or more, if it is less than 50 ppm, it is set to "○", 50 ppm or more, and when it is less than 100 ppm, it is set to "△", and it is 100 ppm or more. When it is set to "X", the anti-gas release property is evaluated.

[Industrial availability]

According to the present invention, it is possible to provide a sealant for an organic electroluminescence display element which is capable of suppressing generation of outgas, and having excellent storage stability and coating properties.

Claims (2)

A sealant for an organic electroluminescence display element, comprising a cationically polymerizable compound and a cationic polymerization initiator, wherein the cationically polymerizable compound contains a compound represented by the following formula (1-1) and The compound represented by the formula (1-2), the compound represented by the following formula (1-1) and the compound represented by the following formula (1-2) in 100 parts by weight of the entire cationically polymerizable compound. The total weight is 70 parts by weight or more, and the viscosity measured at 25 ° C and 50 rpm using an E-type viscometer is 50 to 250 mPa. s, The sealant for an organic electroluminescence display element according to the first aspect of the invention, which comprises BF ₄ ^- , PF ₆ ^- , SbF ₆ ^- or (BX ₄ ) ^- (wherein X represents at least two or more A fluoro or trifluoromethyl-substituted phenyl group is used as a cationic anion initiator as a relative anion of a phosphonium salt, a phosphonium salt, a quaternary ammonium salt, a diazonium salt, or a phosphonium salt.