WO2016167305A1 - Cured body, electronic component, display element, and light-/moisture-curable resin composition - Google Patents
Cured body, electronic component, display element, and light-/moisture-curable resin composition Download PDFInfo
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
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- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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Abstract
Description
ところで、携帯電話、携帯ゲーム機等、各種表示素子付きモバイル機器が普及している現代において、表示素子の小型化は最も求められている課題であり、小型化の手法として、画像表示部を狭額縁化することが行われている(以下、狭額縁設計ともいう)。しかしながら、狭額縁設計においては、充分に光の届かない部分に光硬化型樹脂組成物が塗布されることがあり、その結果、光の届かない部分に塗布された光硬化型樹脂組成物は硬化が不充分となるという問題があった。そこで、光の届かない部分に塗布された場合でも充分に硬化できる樹脂組成物として光熱硬化型樹脂組成物を用い、光硬化と熱硬化とを併用することも行われているが、高温での加熱により素子等に悪影響を与えるおそれがあった。 In recent years, liquid crystal display elements, organic EL display elements, and the like are widely used as display elements having features such as thinness, light weight, and low power consumption. In these display elements, a photocurable resin composition is usually used for sealing a liquid crystal or a light emitting layer, adhering various members such as a substrate, an optical film, and a protective film.
By the way, in the present age when mobile devices with various display elements such as mobile phones and portable game machines are widespread, downsizing of the display elements is the most demanded issue. A frame is being made (hereinafter also referred to as a narrow frame design). However, in a narrow frame design, a photocurable resin composition may be applied to a portion where light does not reach sufficiently, and as a result, the photocurable resin composition applied to a portion where light does not reach is cured. There was a problem that was insufficient. Therefore, a photothermosetting resin composition is used as a resin composition that can be sufficiently cured even when applied to a portion where light does not reach, and photocuring and thermosetting are also used in combination. There was a possibility of adversely affecting the elements and the like by heating.
このような電子部品の接着に用いられる接着剤として、例えば、特許文献1には、数平均分子量が600~1000であるエポキシ化合物を含有する熱硬化型の接着剤が開示されている。しかしながら、特許文献1に開示されているような熱硬化型の接着剤は、熱により損傷する可能性のある電子部品の接着には適さないものであった。 In recent years, electronic components such as semiconductor chips have been required to be highly integrated and miniaturized. For example, a plurality of thin semiconductor chips can be bonded via an adhesive layer to form a stacked body of semiconductor chips. Has been done. Such a semiconductor chip laminate is, for example, a method in which an adhesive is applied on one semiconductor chip, and then the other semiconductor chip is laminated via the adhesive, and then the adhesive is cured. It is manufactured by a method of filling an adhesive between semiconductor chips held at intervals and then curing the adhesive.
As an adhesive used for bonding such electronic parts, for example,
また、電子機器、表示素子等においては、せん断方向又は曲げ方向に力が加えられた場合、温度変化によって熱応力が発生した場合等でも不具合を生じないことが必要とされており、このような条件下でも応力緩和できる柔軟性を持ちながら、高い接着性を維持し、信頼性に優れる電子部品用接着剤及び表示素子用接着剤が求められていた。 As a method for curing a resin composition without heating at a high temperature,
In addition, in electronic devices, display elements, etc., it is necessary that no trouble occurs even when a force is applied in the shearing direction or bending direction, even when a thermal stress is generated due to a temperature change. There has been a demand for an adhesive for electronic parts and an adhesive for display elements that maintain high adhesion and have high reliability while having flexibility that can relieve stress even under conditions.
以下に本発明を詳述する。 The present invention is a cured product of an optical moisture curable resin composition containing a radical polymerizable compound and a moisture curable resin, and has a tensile strength at 400% elongation at 25 ° C. of 3 kgf / cm 2 or more, 20 kgf. It is a cured body that is / cm 2 or less.
The present invention is described in detail below.
なお、上記25℃における400%伸長時の引張強さは、引張試験において引張る前の4倍にまで伸長した時の力を意味する。具体的には例えば、紫外線LED(UV-LED)等を用いて波長365nmの紫外線を1000mJ/cm2照射することによって光湿気硬化型樹脂組成物を光硬化させた後、25℃、50%RHの条件で72時間以上静置することにより湿気硬化させ、得られた硬化体をダンベル状(「JIS K 6251」で規定される6号形)に打ち抜いて得られた試験片を、25℃において引張試験機(例えば、島津製作所社製、「EZ-Graph」等)を用いて5mm/minの速度で引張り、引張る前の4倍にまで伸長した時の力として求めることができる。
また、硬化体が電子部品等において基板等の接着に用いられている場合は、上記引張強さ及び後述する引張破断伸度等の測定は、接着している基板等を剥がした状態のもので行う。ダンベル状にならない場合でも、剥がした状態での硬化体の厚み及び幅を換算することにより、同様にして求める事ができる。 The cured product of the present invention has a lower limit of tensile strength at 400% elongation at 25 ° C. of 3 kgf / cm 2 and an upper limit of 20 kgf / cm 2 . When the tensile strength at 400% elongation at 25 ° C. is in this range, the cured product of the present invention is heated by a change in temperature when a force is applied to the adherend in the shear direction or the bending direction. Even when stress is generated, excellent adhesion and flexibility can be maintained. A preferred lower limit of the tensile strength at 400% elongation in the 25 ° C. is 5 kgf / cm 2, a preferred upper limit 17 kgf / cm 2, more preferred lower limit is 8 kgf / cm 2.
In addition, the tensile strength at 400% elongation at 25 ° C. means a force when the tensile strength is extended to 4 times that before the tensile test. Specifically, for example, an optical moisture curable resin composition is photocured by irradiating ultraviolet light with a wavelength of 365 nm using an ultraviolet LED (UV-LED) or the like at 1000 mJ / cm 2 , and then 25 ° C., 50% RH. The test piece obtained by dampening the obtained cured body into a dumbbell shape (No. 6 defined by “JIS K 6251”) at 25 ° C. Using a tensile tester (for example, “EZ-Graph” manufactured by Shimadzu Corporation), it can be obtained as a force when it is pulled at a speed of 5 mm / min and stretched up to 4 times before pulling.
In addition, when the cured body is used for bonding substrates etc. in electronic parts, etc., the measurement of the tensile strength and the tensile elongation at break described later is the state in which the bonded substrates are peeled off. Do. Even when it does not become a dumbbell shape, it can be obtained in the same manner by converting the thickness and width of the cured body in the peeled state.
なお、上記25℃における引張破断伸度は、具体的には例えば、紫外線LEDランプ等を用いて波長365nmの紫外線を1000mJ/cm2照射することによって光湿気硬化型樹脂組成物を光硬化させた後、25℃、50%RHの条件で72時間以上静置することにより湿気硬化させ、得られた硬化体をダンベル状(「JIS K 6251」で規定される6号形)に打ち抜いて得られた試験片を、25℃において引張試験機(例えば、島津製作所社製、「EZ-Graph」等)を用いて5mm/minの速度で引張った際の破断点における伸度として求めることができる。 In the cured product of the present invention, the preferred lower limit of the tensile elongation at break at 25 ° C. is 500%. When the tensile breaking elongation at 25 ° C. is 500% or more, the cured product of the present invention generates thermal stress due to temperature change when force is applied to the adherend in the shearing direction or bending direction. In such a case, the effect of maintaining excellent adhesiveness and flexibility is superior. A more preferable lower limit of the tensile elongation at break at 25 ° C. is 600%.
The tensile elongation at break at 25 ° C. was specifically obtained by photocuring the light moisture curable resin composition by, for example, irradiating ultraviolet light having a wavelength of 365 nm with 1000 mJ / cm 2 using an ultraviolet LED lamp or the like. After that, it is cured by dampening by allowing it to stand for 72 hours or more at 25 ° C. and 50% RH, and the resulting cured product is punched into a dumbbell shape (No. 6 as defined in “JIS K 6251”). The elongation at break when the test piece was pulled at a rate of 5 mm / min using a tensile tester (eg, “EZ-Graph” manufactured by Shimadzu Corporation) at 25 ° C. can be obtained.
なお、上記ポリカーボネート及びガラスに対する引張せん断接着強さは、具体的には例えば、光湿気硬化型樹脂組成物をポリカーボネート基板上に約1mmの幅で塗布し、紫外線LEDランプ等を用いて波長365nmの紫外線を1000mJ/cm2照射することによって、光湿気硬化型樹脂組成物を光硬化させた後、ガラス基板を重ね、20gの重りを置き、25℃、50%RHの条件で72時間以上静置することにより光湿気硬化型樹脂組成物を湿気硬化させて得られた試験片を、25℃において引張試験機(例えば、島津製作所社製、「EZ-Graph」等)を用いてせん断方向に10mm/minの速度で引張ることにより測定することができる。 In the cured product of the present invention, the preferred lower limit of the tensile shear adhesive strength to polycarbonate and glass measured at 25 ° C. according to JIS K 6850 is 10 kgf / cm 2 . When the tensile shear bond strength to the polycarbonate and glass is 10 kgf / cm 2 or more, the cured product of the present invention is subjected to a temperature change when a force is applied to the adherend in the shear direction or the bending direction. In the case where thermal stress is generated, the effect of maintaining excellent adhesiveness is improved. A more preferred lower limit of the tensile shear bond strength to the polycarbonate and glass is 15 kgf / cm 2 .
The tensile shear bond strength to the polycarbonate and glass is specifically, for example, by applying a light moisture curable resin composition on a polycarbonate substrate with a width of about 1 mm, and using an ultraviolet LED lamp or the like at a wavelength of 365 nm. After photocuring the light moisture curable resin composition by irradiating with 1000 mJ / cm 2 of ultraviolet rays, the glass substrate is overlaid, a 20 g weight is placed, and it is allowed to stand for 72 hours or more at 25 ° C. and 50% RH. The test piece obtained by moisture-curing the optical moisture-curable resin composition was 10 mm in the shear direction at 25 ° C. using a tensile tester (for example, “EZ-Graph” manufactured by Shimadzu Corporation). It can be measured by pulling at a rate of / min.
なお、上記80℃における貯蔵弾性率は、動的粘弾性測定装置(例えば、IT計測制御社製、「DVA-200」等)を用いることで測定できる。 The cured product of the present invention has a preferred lower limit of storage modulus at 80 ° C. of 1 × 10 5 Pa and a preferred upper limit of 1 × 10 7 Pa. When the storage elastic modulus at 80 ° C. is within this range, the cured product of the present invention has suitable flexibility even at high temperatures and is excellent in reliability. The more preferable lower limit of the storage elastic modulus at 80 ° C. is 8 × 10 5 Pa, and the more preferable upper limit is 5 × 10 6 Pa.
The storage elastic modulus at 80 ° C. can be measured by using a dynamic viscoelasticity measuring apparatus (for example, “DVA-200” manufactured by IT Measurement Control Co., Ltd.).
上記ラジカル重合性化合物は、硬化物の柔軟性が高く(引張強さが低く)、接着力が弱く、かつ、よく伸びる(破断伸度が高い)傾向にある。一方、上記湿気硬化型樹脂は、硬化物の柔軟性が低く、接着力が強く、かつ、よく伸びる傾向にある。そのため、これらの成分として用いる化合物の種類及びその配合比、ガラス転移温度、架橋密度等を調整することにより、硬化体の引張強さ等を上述した範囲に調整できる。また、本発明の目的を阻害しない範囲であれば、後述する充填剤等の種類及び配合量を調整することによっても、硬化体の引張強さ等を上述した範囲に調整できる。 The cured product of the present invention is a cured product of an optical moisture curable resin composition containing a radical polymerizable compound and a moisture curable resin. A light moisture curable resin composition that becomes a cured product of the present invention by light moisture curing, that is, a light moisture curable resin composition containing a radical polymerizable compound and a moisture curable resin, An optical moisture curable resin composition having a tensile strength at 400% elongation at 25 ° C. of 3 to 20 kgf / cm 2 is also one aspect of the present invention.
The radical polymerizable compound has a high flexibility of the cured product (low tensile strength), weak adhesive strength, and tends to stretch well (high elongation at break). On the other hand, the moisture curable resin has a low flexibility of the cured product, a strong adhesive force, and tends to grow well. Therefore, the tensile strength and the like of the cured product can be adjusted to the above-described range by adjusting the types of compounds used as these components, the blending ratio thereof, the glass transition temperature, the crosslinking density, and the like. Moreover, if it is the range which does not inhibit the objective of this invention, the tensile strength of a hardening body etc. can be adjusted to the range mentioned above also by adjusting the kind and compounding quantity of a filler etc. which are mentioned later.
上記ラジカル重合性化合物としては、光重合性を有するラジカル重合性化合物であればよく、分子中にラジカル反応性官能基を有する化合物であれば特に限定されないが、ラジカル反応性官能基として不飽和二重結合を有する化合物が好適であり、特に反応性の面から(メタ)アクリロイル基を有する化合物(以下、「(メタ)アクリル化合物」ともいう)が好適である。
なお、本明細書において、上記「(メタ)アクリロイル」は、アクリロイル又はメタクリロイルを意味し、上記「(メタ)アクリル」は、アクリル又はメタクリルを意味する。 The light moisture curable resin composition of the present invention contains a radically polymerizable compound.
The radical polymerizable compound is not particularly limited as long as it is a radical polymerizable compound having photopolymerizability, and is a compound having a radical reactive functional group in the molecule. A compound having a heavy bond is preferable, and a compound having a (meth) acryloyl group (hereinafter also referred to as “(meth) acrylic compound”) is particularly preferable from the viewpoint of reactivity.
In the present specification, the “(meth) acryloyl” means acryloyl or methacryloyl, and the “(meth) acryl” means acryl or methacryl.
なお、本明細書において、上記「(メタ)アクリレート」とは、アクリレート又はメタクリレートを意味する。また、上記ウレタン(メタ)アクリレートの原料となるイソシアネート化合物のイソシアネート基は、全てウレタン結合の形成に用いられ、上記ウレタン(メタ)アクリレートは、残存イソシアネート基を有さない。 As the (meth) acrylic compound, for example, (meth) acrylic acid ester compound obtained by reacting (meth) acrylic acid with a compound having a hydroxyl group, (meth) acrylic acid and epoxy compound are reacted. Examples include epoxy (meth) acrylates obtained, urethane (meth) acrylates obtained by reacting an isocyanate compound with a (meth) acrylic acid derivative having a hydroxyl group.
In the present specification, the “(meth) acrylate” means acrylate or methacrylate. Moreover, all the isocyanate groups of the isocyanate compound used as the raw material of the said urethane (meth) acrylate are used for formation of a urethane bond, and the said urethane (meth) acrylate does not have a residual isocyanate group.
上記ビスフェノールF型エポキシ樹脂のうち市販されているものとしては、例えば、jER806、jER4004(いずれも三菱化学社製)等が挙げられる。
上記ビスフェノールS型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンEXA1514(DIC社製)等が挙げられる。
上記2,2’-ジアリルビスフェノールA型エポキシ樹脂のうち市販されているものとしては、例えば、RE-810NM(日本化薬社製)等が挙げられる。
上記水添ビスフェノール型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンEXA7015(DIC社製)等が挙げられる。
上記プロピレンオキシド付加ビスフェノールA型エポキシ樹脂のうち市販されているものとしては、例えば、EP-4000S(ADEKA社製)等が挙げられる。
上記レゾルシノール型エポキシ樹脂のうち市販されているものとしては、例えば、EX-201(ナガセケムテックス社製)等が挙げられる。
上記ビフェニル型エポキシ樹脂のうち市販されているものとしては、例えば、jER YX-4000H(三菱化学社製)等が挙げられる。
上記スルフィド型エポキシ樹脂のうち市販されているものとしては、例えば、YSLV-50TE(新日鉄住金化学社製)等が挙げられる。
上記ジフェニルエーテル型エポキシ樹脂のうち市販されているものとしては、例えば、YSLV-80DE(新日鉄住金化学社製)等が挙げられる。
上記ジシクロペンタジエン型エポキシ樹脂のうち市販されているものとしては、例えば、EP-4088S(ADEKA社製)等が挙げられる。
上記ナフタレン型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンHP4032、エピクロンEXA-4700(いずれもDIC社製)等が挙げられる。
上記フェノールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンN-770(DIC社製)等が挙げられる。
上記オルトクレゾールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンN-670-EXP-S(DIC社製)等が挙げられる。
上記ジシクロペンタジエンノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンHP7200(DIC社製)等が挙げられる。
上記ビフェニルノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、NC-3000P(日本化薬社製)等が挙げられる。
上記ナフタレンフェノールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、ESN-165S(新日鉄住金化学社製)等が挙げられる。
上記グリシジルアミン型エポキシ樹脂のうち市販されているものとしては、例えば、jER630(三菱化学社製)、エピクロン430(DIC社製)、TETRAD-X(三菱ガス化学社製)等が挙げられる。
上記アルキルポリオール型エポキシ樹脂のうち市販されているものとしては、例えば、ZX-1542(新日鉄住金化学社製)、エピクロン726(DIC社製)、エポライト80MFA(共栄社化学社製)、デナコールEX-611(ナガセケムテックス社製)等が挙げられる。
上記ゴム変性型エポキシ樹脂のうち市販されているものとしては、例えば、YR-450、YR-207(いずれも新日鉄住金化学社製)、エポリードPB(ダイセル社製)等が挙げられる。
上記グリシジルエステル化合物のうち市販されているものとしては、例えば、デナコールEX-147(ナガセケムテックス社製)等が挙げられる。
上記ビスフェノールA型エピスルフィド樹脂のうち市販されているものとしては、例えば、jER YL-7000(三菱化学社製)等が挙げられる。
上記エポキシ化合物のうちその他に市販されているものとしては、例えば、YDC-1312、YSLV-80XY、YSLV-90CR(いずれも新日鉄住金化学社製)、XAC4151(旭化成社製)、jER1031、jER1032(いずれも三菱化学社製)、EXA-7120(DIC社製)、TEPIC(日産化学社製)等が挙げられる。 Examples of commercially available bisphenol A type epoxy resins include jER828EL, jER1001, jER1004 (all manufactured by Mitsubishi Chemical Corporation), Epicron 850-S (manufactured by DIC Corporation), and the like.
As what is marketed among the said bisphenol F-type epoxy resins, jER806, jER4004 (all are the Mitsubishi Chemical company make) etc. are mentioned, for example.
As what is marketed among the said bisphenol S-type epoxy resins, Epicron EXA1514 (made by DIC Corporation) etc. are mentioned, for example.
Examples of commercially available 2,2′-diallylbisphenol A type epoxy resins include RE-810NM (manufactured by Nippon Kayaku Co., Ltd.).
As what is marketed among the said hydrogenated bisphenol type | mold epoxy resins, Epicron EXA7015 (made by DIC Corporation) etc. are mentioned, for example.
Examples of commercially available propylene oxide-added bisphenol A type epoxy resins include EP-4000S (manufactured by ADEKA).
Examples of commercially available resorcinol type epoxy resins include EX-201 (manufactured by Nagase ChemteX Corporation).
Examples of commercially available biphenyl type epoxy resins include jER YX-4000H (manufactured by Mitsubishi Chemical Corporation).
Examples of commercially available sulfide type epoxy resins include YSLV-50TE (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
Examples of commercially available diphenyl ether type epoxy resins include YSLV-80DE (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
Examples of commercially available dicyclopentadiene type epoxy resins include EP-4088S (manufactured by ADEKA).
Examples of commercially available naphthalene type epoxy resins include Epicron HP4032, Epicron EXA-4700 (both manufactured by DIC) and the like.
Examples of commercially available phenol novolac epoxy resins include Epicron N-770 (manufactured by DIC).
Examples of the ortho-cresol novolac type epoxy resin that are commercially available include epiclone N-670-EXP-S (manufactured by DIC).
As what is marketed among the said dicyclopentadiene novolak-type epoxy resins, epiclone HP7200 (made by DIC) etc. are mentioned, for example.
Examples of commercially available biphenyl novolac epoxy resins include NC-3000P (manufactured by Nippon Kayaku Co., Ltd.).
Examples of commercially available naphthalene phenol novolac type epoxy resins include ESN-165S (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
Examples of commercially available glycidylamine type epoxy resins include jER630 (manufactured by Mitsubishi Chemical), Epicron 430 (manufactured by DIC), and TETRAD-X (manufactured by Mitsubishi Gas Chemical).
Examples of commercially available alkyl polyol type epoxy resins include ZX-1542 (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), Epiklon 726 (manufactured by DIC), Epolite 80MFA (manufactured by Kyoeisha Chemical Co., Ltd.), Denacol EX-611. (Manufactured by Nagase ChemteX Corporation).
Examples of commercially available rubber-modified epoxy resins include YR-450, YR-207 (both manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), Epolide PB (manufactured by Daicel Corporation), and the like.
Examples of commercially available glycidyl ester compounds include Denacol EX-147 (manufactured by Nagase ChemteX Corporation).
Examples of commercially available bisphenol A type episulfide resins include jER YL-7000 (manufactured by Mitsubishi Chemical Corporation).
Other commercially available epoxy compounds include, for example, YDC-1312, YSLV-80XY, YSLV-90CR (all manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), XAC4151 (manufactured by Asahi Kasei Co., Ltd.), jER1031, jER1032 (all Also, Mitsubishi Chemical Corporation), EXA-7120 (DIC Corporation), TEPIC (Nissan Chemical Corporation) and the like.
上記その他のラジカル重合性化合物としては、例えば、N,N-ジメチル(メタ)アクリルアミド、N-(メタ)アクリロイルモルホリン、N-ヒドロキシエチル(メタ)アクリルアミド、N,N-ジエチル(メタ)アクリルアミド、N-イソプロピル(メタ)アクリルアミド、N,N-ジメチルアミノプロピル(メタ)アクリルアミド等の(メタ)アクリルアミド化合物、スチレン、α-メチルスチレン、N-ビニルピロリドン、N-ビニル-ε-カプロラクタム等のビニル化合物等が挙げられる。 In addition, other radical polymerizable compounds other than those described above can be used as appropriate.
Examples of the other radical polymerizable compounds include N, N-dimethyl (meth) acrylamide, N- (meth) acryloylmorpholine, N-hydroxyethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N -(Meth) acrylamide compounds such as isopropyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, vinyl compounds such as styrene, α-methylstyrene, N-vinylpyrrolidone, N-vinyl-ε-caprolactam, etc. Is mentioned.
上記湿気硬化型樹脂としては、湿気硬化型ウレタン樹脂及び架橋性シリル基を有する樹脂等が挙げられる。なかでも、湿気硬化時の速硬化性に優れることから、湿気硬化型ウレタン樹脂が好ましい。上記湿気硬化型ウレタン樹脂は、ウレタン結合とイソシアネート基とを有し、分子内のイソシアネート基が空気中又は被着体中の水分と反応して硬化する。
上記湿気硬化型ウレタン樹脂は、上記イソシアネート基を分子の末端に有することが好ましい。 The optical moisture curable resin composition of the present invention contains a moisture curable resin.
Examples of the moisture curable resin include a moisture curable urethane resin and a resin having a crosslinkable silyl group. Especially, since it is excellent in the quick curability at the time of moisture hardening, a moisture hardening type urethane resin is preferable. The moisture curable urethane resin has a urethane bond and an isocyanate group, and the isocyanate group in the molecule is cured by reacting with moisture in the air or the adherend.
The moisture curable urethane resin preferably has the isocyanate group at the end of the molecule.
上記湿気硬化型ウレタン樹脂は、1分子中に2個以上の水酸基を有するポリオール化合物と、1分子中に2個以上のイソシアネート基を有するポリイソシアネート化合物とを反応させることにより、得ることができる。 The moisture curable urethane resin may have only one isocyanate group in one molecule, or may have two or more. Especially, it is preferable to have an isocyanate group at both ends.
The moisture curable urethane resin can be obtained by reacting a polyol compound having two or more hydroxyl groups in one molecule with a polyisocyanate compound having two or more isocyanate groups in one molecule.
上記ビスフェノール型のポリオキシアルキレン変性体は、ビスフェノール型分子骨格の両末端に、1種又は2種以上のアルキレンオキシドが付加されていることが好ましい。ビスフェノール型としては特に限定されず、A型、F型、S型等が挙げられ、好ましくはビスフェノールA型である。 The modified bisphenol-type polyoxyalkylene is a polyether polyol obtained by addition reaction of alkylene oxide (for example, ethylene oxide, propylene oxide, butylene oxide, isobutylene oxide, etc.) to the active hydrogen portion of the bisphenol-type molecular skeleton, A random copolymer or a block copolymer may be used.
The modified bisphenol-type polyoxyalkylene preferably has one or more alkylene oxides added to both ends of the bisphenol-type molecular skeleton. It does not specifically limit as a bisphenol type, A type, F type, S type etc. are mentioned, Preferably it is bisphenol A type.
なかでも、プロピレングリコール、テトラヒドロフラン(THF)化合物の開環重合化合物、又は、メチル基等の置換基を有するテトラヒドロフラン化合物の開環重合化合物からなるポリエーテルポリオールを用いたものが好ましい。 Moreover, it is preferable that the said moisture hardening type urethane resin is obtained using the polyol compound which has a structure represented by following formula (1). By using a polyol compound having a structure represented by the following formula (1), it is possible to obtain a composition excellent in adhesiveness and a cured product that is flexible and has good elongation, and is compatible with the radical polymerizable compound. It will be excellent.
Among these, those using a polyether polyol composed of a ring-opening polymerization compound of propylene glycol, a tetrahydrofuran (THF) compound, or a ring-opening polymerization compound of a tetrahydrofuran compound having a substituent such as a methyl group are preferable.
なお、Lが0の場合とは、Rと結合した炭素が直接酸素と結合している場合を意味する。 In the formula (1), R represents hydrogen, a methyl group, or an ethyl group, n is an integer of 1 to 10, L is an integer of 0 to 5, and m is an integer of 1 to 500. n is preferably 1 to 5, L is preferably 0 to 4, and m is preferably 50 to 200.
The case where L is 0 means the case where carbon bonded to R is directly bonded to oxygen.
上記湿気硬化型ウレタン樹脂が有していてもよいラジカル重合性官能基としては、不飽和二重結合を有する基が好ましく、特に反応性の面から(メタ)アクリロイル基がより好ましい。
なお、ラジカル重合性官能基を有する湿気硬化型ウレタン樹脂は、ラジカル重合性化合物には含まず、湿気硬化型ウレタン樹脂として扱う。 Furthermore, the moisture curable urethane resin may have a radical polymerizable functional group.
The radical polymerizable functional group that the moisture curable urethane resin may have is preferably a group having an unsaturated double bond, and more preferably a (meth) acryloyl group from the viewpoint of reactivity.
The moisture curable urethane resin having a radical polymerizable functional group is not included in the radical polymerizable compound and is treated as a moisture curable urethane resin.
なお、本明細書において上記重量平均分子量は、ゲルパーミエーションクロマトグラフィー(GPC)で測定を行い、ポリスチレン換算により求められる値である。GPCによってポリスチレン換算による重量平均分子量を測定する際のカラムとしては、例えば、Shodex LF-804(昭和電工社製)等が挙げられる。また、GPCで用いる溶媒としては、テトラヒドロフラン等が挙げられる。 The weight average molecular weight of the moisture curable urethane resin is not particularly limited, but a preferable lower limit is 800 and a preferable upper limit is 10,000. When the weight average molecular weight of the moisture curable urethane resin is within this range, the crosslinking density does not become too high, the obtained cured product is more excellent in flexibility, and the resulting optical moisture curable resin composition has applicability. It will be better. The more preferable lower limit of the weight average molecular weight of the moisture curable urethane resin is 2000, the more preferable upper limit is 8000, the still more preferable lower limit is 2500, and the further preferable upper limit is 6000.
In addition, the said weight average molecular weight is a value calculated | required by polystyrene conversion by measuring with a gel permeation chromatography (GPC) in this specification. Examples of the column for measuring the weight average molecular weight in terms of polystyrene by GPC include Shodex LF-804 (manufactured by Showa Denko KK). Moreover, tetrahydrofuran etc. are mentioned as a solvent used by GPC.
上記架橋性シリル基を有する樹脂のうち市販されているものとしては、例えば、エクスターS2410、S2420、S3430(いずれも旭硝子社製)、XMAP SA-100S(カネカ社製)等が挙げられる。 The resin having a crosslinkable silyl group preferably has a crosslinkable silyl group at the terminal.
Examples of commercially available resins having a crosslinkable silyl group include Exter S2410, S2420, S3430 (all manufactured by Asahi Glass Co., Ltd.), XMAP SA-100S (manufactured by Kaneka Corp.), and the like.
上記光ラジカル重合開始剤としては、例えば、ベンゾフェノン系化合物、アセトフェノン系化合物、アシルフォスフィンオキサイド系化合物、チタノセン系化合物、オキシムエステル系化合物、ベンゾインエーテル系化合物、チオキサントン等が挙げられる。 The light moisture curable resin composition of the present invention usually contains a radical photopolymerization initiator.
Examples of the photo radical polymerization initiator include benzophenone compounds, acetophenone compounds, acylphosphine oxide compounds, titanocene compounds, oxime ester compounds, benzoin ether compounds, thioxanthones, and the like.
なお、上記充填剤の一次粒子径は、NICOMP 380ZLS(PARTICLE SIZING SYSTEMS社製)等の粒度分布測定装置を用いて、上記充填剤を溶媒(水、有機溶媒等)に分散させて測定することができる。
また、上記充填剤は、本発明の光湿気硬化型樹脂組成物中において二次粒子(一次粒子が複数集まったもの)として存在する場合があり、このような二次粒子の粒子径の好ましい下限は5nm、好ましい上限は500nm、より好ましい下限は10nm、より好ましい上限は100nmである。上記充填剤の二次粒子の粒子径は、本発明の光湿気硬化型樹脂組成物又はその硬化体を、透過型電子顕微鏡(TEM)を用いて観察することにより測定することができる。 The filler preferably has a primary particle diameter with a preferred lower limit of 1 nm and a preferred upper limit of 50 nm. When the primary particle diameter of the filler is within this range, the resulting light moisture curable resin composition is more excellent in coating properties and shape retention after coating. The more preferable lower limit of the primary particle diameter of the filler is 5 nm, the more preferable upper limit is 30 nm, the still more preferable lower limit is 10 nm, and the still more preferable upper limit is 20 nm.
The primary particle size of the filler may be measured by dispersing the filler in a solvent (water, organic solvent, etc.) using a particle size distribution measuring device such as NICOMP 380ZLS (manufactured by PARTICS SIZING SYSTEMS). it can.
In addition, the filler may be present as secondary particles (a collection of a plurality of primary particles) in the light moisture curable resin composition of the present invention, and the preferred lower limit of the particle diameter of such secondary particles. Is 5 nm, the preferred upper limit is 500 nm, the more preferred lower limit is 10 nm, and the more preferred upper limit is 100 nm. The particle diameter of the secondary particles of the filler can be measured by observing the optical moisture curable resin composition of the present invention or a cured product thereof using a transmission electron microscope (TEM).
上記疎水性表面処理としては、シリル化処理、アルキル化処理、エポキシ化処理等が挙げられる。なかでも、形状保持性を向上させる効果に優れることから、シリル化処理が好ましく、トリメチルシリル化処理がより好ましい。 The filler is preferably subjected to a hydrophobic surface treatment. By the hydrophobic surface treatment, the resulting optical moisture curable resin composition is more excellent in shape retention after application.
Examples of the hydrophobic surface treatment include silylation treatment, alkylation treatment, and epoxidation treatment. Especially, since it is excellent in the effect which improves shape retainability, a silylation process is preferable and a trimethylsilylation process is more preferable.
具体的には例えば、上記トリメチルシリル化処理シリカは、例えば、シリカをゾルゲル法等の方法で合成し、シリカを流動させた状態でヘキサメチルジシラザンを噴霧する方法、アルコール、トルエン等の有機溶媒中にシリカを加え、更に、ヘキサメチルジシラザンと水とを加えた後、水と有機溶媒とをエバポレーターで蒸発乾燥させる方法等により作製することができる。 Examples of the method for treating the filler with a hydrophobic surface include a method for treating the surface of the filler with a surface treatment agent such as a silane coupling agent.
Specifically, for example, the trimethylsilylated silica is prepared by, for example, synthesizing silica by a method such as a sol-gel method and spraying hexamethyldisilazane in a state where the silica is fluidized, in an organic solvent such as alcohol or toluene. Silica is added to the mixture, and further, hexamethyldisilazane and water are added, and then water and an organic solvent are evaporated and dried with an evaporator.
なお、上記イソシアネート基、イソチオシアネート基、及び、カルボジイミド基からなる群より選択される少なくとも1種の基を有する化合物は、化学的に水分を除去するものであるが、本発明の光湿気硬化型樹脂組成物に使用する各材料を配合する前に、予め、必要に応じて、各材料に物理的な処理(ゼオライトのような水分吸着剤による水分の除去)を行っておいてもよい。 The compound having at least one group selected from the group consisting of the isocyanate group, isothiocyanate group, and carbodiimide group may be monofunctional or polyfunctional, It is preferable that it is bifunctional because it has moderate reactivity.
The compound having at least one group selected from the group consisting of the isocyanate group, the isothiocyanate group, and the carbodiimide group is for chemically removing moisture, but the light moisture curable type of the present invention. Before blending each material to be used in the resin composition, physical treatment (removal of water with a moisture adsorbent such as zeolite) may be performed on each material in advance as necessary.
上記イソシアネート基を有する化合物は、上記湿気硬化型樹脂の原料となるポリイソシアネート化合物と同様の化合物であってもよいし、異なっていてもよい。 Among the compounds having at least one group selected from the group consisting of the isocyanate group, isothiocyanate group and carbodiimide group, the crosslink density is improved, and the cured product of the resulting light moisture curable resin composition is obtained. A compound having an isocyanate group is preferred because it is excellent in the effect of having excellent adhesiveness.
The compound having an isocyanate group may be the same as or different from the polyisocyanate compound that is a raw material for the moisture-curable resin.
また、イソチオシアネート基を有する化合物としては、具体的には例えば、ベンジルイソチオシアネート、フェニルイソチオシアネート、4-フェニルブチルイソチオシアネート、3-フェニルプロピルイソチオシアネート等が挙げられる。
また、カルボジイミド基を有する化合物としては、具体的には例えば、N,N-ジシクロヘキシルカルボジイミド、N,N-ジイソプロピルカルボジイミド、1-エチル-3-(3-ジメチルアミノプロピル)カルボジイミド塩酸塩、ビス(2,6-ジイソプロピルフェニル)カルボジイミド等が挙げられ、市販されているものとしては、例えば、カルボジライトLA-1(日清紡社製)等が挙げられる。
これらは、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。 Specific examples of the compound having an isocyanate group include isophorone diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, and diphenylmethane-4,4′-. Diisocyanate (MDI), hydrogenated MDI, polymeric MDI, 1,5-naphthalene diisocyanate (NDI), norbornane diisocyanate, tolidine diisocyanate, xylylene diisocyanate (XDI), hydrogenated XDI, lysine diisocyanate, triphenylmethane triisocyanate, tris ( Isocyanatophenyl) thiophosphate, tetramethylxylene diisocyanate, 1,6,11-undecane triisocyanate, etc. Is mentioned.
Specific examples of the compound having an isothiocyanate group include benzyl isothiocyanate, phenyl isothiocyanate, 4-phenylbutyl isothiocyanate, and 3-phenylpropyl isothiocyanate.
Specific examples of the compound having a carbodiimide group include N, N-dicyclohexylcarbodiimide, N, N-diisopropylcarbodiimide, 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, bis (2 , 6-diisopropylphenyl) carbodiimide, and examples of commercially available products include carbodilite LA-1 (manufactured by Nisshinbo Co., Ltd.).
These may be used alone or in combination of two or more.
なお、本明細書において、上記「遮光剤」は、可視光領域の光を透過させ難い能力を有する材料を意味する。 The light moisture curable resin composition of the present invention may contain a light shielding agent. By containing the light-shielding agent, the light moisture curable resin composition of the present invention has excellent light-shielding properties. For example, when used in a display element, light leakage can be prevented. In addition, the display element manufactured using the light moisture curable resin composition of the present invention containing the above light shielding agent is high because the light moisture curable resin composition has sufficient light shielding properties, and does not leak light. It has contrast and has excellent image display quality.
In the present specification, the “light-shielding agent” means a material having an ability of hardly transmitting light in the visible light region.
また、上記遮光剤は、黒色を呈するものでなくてもよく、可視光領域の光を透過させ難い能力を有する材料であれば、シリカ、タルク、酸化チタン等、充填剤として挙げた材料等も上記遮光剤に含まれる。なかでも、チタンブラックが好ましい。 Examples of the light-shielding agent include iron oxide, titanium black, aniline black, cyanine black, fullerene, carbon black, and resin-coated carbon black.
Further, the light-shielding agent does not have to be black, and materials such as silica, talc, titanium oxide, and the like mentioned as fillers can be used as long as they have the ability to hardly transmit light in the visible light region. Included in the light shielding agent. Of these, titanium black is preferable.
即ち、上記チタンブラックは、可視光領域の波長の光を充分に遮蔽することで本発明の光湿気硬化型樹脂組成物に遮光性を付与する一方、紫外線領域付近の波長の光は透過させる性質を有する遮光剤である。従って、光ラジカル重合開始剤として、上記チタンブラックの透過率の高くなる波長(370~450nm)の光によって反応を開始可能なものを用いることで、本発明の光湿気硬化型樹脂組成物の光硬化性をより増大させることができる。また一方で、本発明の光湿気硬化型樹脂組成物に含有される遮光剤としては、絶縁性の高い物質が好ましく、絶縁性の高い遮光剤としてもチタンブラックが好適である。
上記チタンブラックは、光学濃度(OD値)が、3以上であることが好ましく、4以上であることがより好ましい。また、上記チタンブラックは、黒色度(L値)が9以上であることが好ましく、11以上であることがより好ましい。上記チタンブラックの遮光性は高ければ高いほど良く、上記チタンブラックのOD値に好ましい上限は特に無いが、通常は5以下となる。 Titanium black is a substance having a higher transmittance in the vicinity of the ultraviolet region, particularly for light having a wavelength of 370 to 450 nm, compared to the average transmittance for light having a wavelength of 300 to 800 nm.
That is, the above-described titanium black sufficiently shields light having a wavelength in the visible light region, thereby imparting light shielding properties to the light moisture curable resin composition of the present invention, while transmitting light having a wavelength in the vicinity of the ultraviolet region. Is a light-shielding agent. Therefore, by using a photo radical polymerization initiator that can initiate a reaction with light having a wavelength (370 to 450 nm) at which the transmittance of titanium black is high, the light of the photo moisture curable resin composition of the present invention can be used. Curability can be further increased. On the other hand, the light-shielding agent contained in the light moisture curable resin composition of the present invention is preferably a highly insulating material, and titanium black is also preferable as the highly insulating light-shielding agent.
The titanium black preferably has an optical density (OD value) of 3 or more, and more preferably 4 or more. The titanium black preferably has a blackness (L value) of 9 or more, more preferably 11 or more. The higher the light shielding property of the titanium black, the better. There is no particular upper limit to the OD value of the titanium black, but it is usually 5 or less.
また、上記チタンブラックのシート抵抗の好ましい下限は、樹脂と混合された場合(70%配合)において、109Ω/□であり、より好ましい下限は1011Ω/□である。 The preferable lower limit of the specific surface area of the titanium black is 5 m 2 / g, the preferable upper limit is 40 m 2 / g, the more preferable lower limit is 10 m 2 / g, and the more preferable upper limit is 25 m 2 / g.
Moreover, the preferable lower limit of the sheet resistance of the titanium black is 10 9 Ω / □ when mixed with a resin (70% blending), and the more preferable lower limit is 10 11 Ω / □.
なお、上記遮光剤の粒子径は、NICOMP 380ZLS(PARTICLE SIZING SYSTEMS社製)を用いて、上記遮光剤を溶媒(水、有機溶媒等)に分散させて測定することができる。 In the light-moisture curable resin composition of the present invention, the primary particle diameter of the light-shielding agent is appropriately selected depending on the application, such as the distance between the substrates of the display element, but the preferable lower limit is 30 nm and the preferable upper limit is 500 nm. It is. When the primary particle diameter of the light-shielding agent is within this range, the resulting optical moisture-curable resin composition is more excellent in coating properties and workability without significantly increasing viscosity and thixotropy. The more preferable lower limit of the primary particle diameter of the light shielding agent is 50 nm, and the more preferable upper limit is 200 nm.
The particle size of the light-shielding agent can be measured by dispersing the light-shielding agent in a solvent (water, organic solvent, etc.) using NICOMP 380ZLS (manufactured by PARTICS SIZING SYSTEMS).
なお、上記水分量は、カールフィッシャー水分測定装置により測定することができる。 It is preferable that the moisture content of the light moisture curable resin composition of the present invention is 100 ppm or less. When the water content is 100 ppm or less, the reaction between the moisture curable resin and moisture during storage is suppressed, and the optical moisture curable resin composition is more excellent in storage stability. The water content is more preferably 80 ppm or less.
The water content can be measured by a Karl Fischer moisture measuring device.
なお、本発明の光湿気硬化型樹脂組成物の粘度が高すぎる場合は、塗布時に加温することで塗布性を向上させることができる。 In the light moisture curable resin composition of the present invention, the preferable lower limit of the viscosity measured at 25 ° C. and 1 rpm using a cone plate viscometer is 50 Pa · s, and the preferable upper limit is 500 Pa · s. When the viscosity is within this range, when the light moisture curable resin composition is used as an adhesive for electronic components or an adhesive for display elements, it is more excellent in workability when applied to an adherend such as a substrate. Become. A more preferred lower limit of the viscosity is 80 Pa · s, a more preferred upper limit is 300 Pa · s, and a still more preferred upper limit is 200 Pa · s.
In addition, when the viscosity of the light moisture curable resin composition of this invention is too high, applicability | paintability can be improved by heating at the time of application | coating.
なお、本明細書において上記チクソトロピックインデックスとは、コーンプレート型粘度計を用いて25℃、1rpmの条件で測定した粘度を、コーンプレート型粘度計を用いて25℃、10rpmの条件で測定した粘度で除した値を意味する。 The preferable lower limit of the thixotropic index of the light moisture curable resin composition of the present invention is 1.3, and the preferable upper limit is 5.0. When the thixotropic index is within this range, when the optical moisture curable resin composition is used as an adhesive for electronic parts or an adhesive for display elements, it is more excellent in workability when applied to an adherend such as a substrate. It will be a thing. The more preferable lower limit of the thixotropic index is 1.5, and the more preferable upper limit is 4.0.
In the present specification, the thixotropic index is a viscosity measured at 25 ° C. and 1 rpm using a cone plate viscometer, and measured at 25 ° C. and 10 rpm using a cone plate viscometer. It means the value divided by the viscosity.
上記被着体の形状としては、例えば、フィルム状、シート状、板状、パネル状、トレイ状、ロッド(棒状体)状、箱体状、筐体状等が挙げられる。 Examples of adherends that can be bonded using the light moisture curable resin composition of the present invention include various adherends such as metal, glass, and plastic.
Examples of the shape of the adherend include a film shape, a sheet shape, a plate shape, a panel shape, a tray shape, a rod (rod-like body) shape, a box shape, and a housing shape.
上記ガラスとしては、例えば、アルカリガラス、無アルカリガラス、石英ガラス等が挙げられる。
上記プラスチックとしては、例えば、高密度ポリエチレン、超高分子量ポリエチレン、アイソタクチックポリプロピレン、シンジオタクチックポリプロピレン、エチレンプロピレン共重合体樹脂等のポリオレフィン系樹脂、ナイロン6(N6)、ナイロン66(N66)、ナイロン46(N46)、ナイロン11(N11)、ナイロン12(N12)、ナイロン610(N610)、ナイロン612(N612)、ナイロン6/66共重合体(N6/66)、ナイロン6/66/610共重合体(N6/66/610)、ナイロンMXD6(MXD6)、ナイロン6T、ナイロン6/6T共重合体、ナイロン66/PP共重合体、ナイロン66/PPS共重合体等のポリアミド系樹脂、ポリブチレンテレフタレート(PBT)、ポリエチレンテレフタレート(PET)、ポリエチレンイソフタレート(PEI)、PET/PEI共重合体、ポリアリレート(PAR)、ポリブチレンナフタレート(PBN)、液晶ポリエステル、ポリオキシアルキレンジイミドジ酸/ポリブチレンテレフタレート共重合体等の芳香族ポリエステル系樹脂、ポリアクリロニトリル(PAN)、ポリメタクリロニトリル、アクリロニトリル/スチレン共重合体(AS)、メタクリロニトリル/スチレン共重合体、メタクリロニトリル/スチレン/ブタジエン共重合体等のポリニトリル系樹脂、ポリカーボネート、ポリメタクリル酸メチル(PMMA)、ポリメタクリル酸エチル等のポリメタクリレート系樹脂、エチレン/酢酸ビニル共重合体(EVA)、ポリビニルアルコール(PVA)、ビニルアルコール/エチレン共重合体(EVOH)、ポリ塩化ビニリデン(PVDC)、ポリ塩化ビニル(PVC)、塩化ビニル/塩化ビニリデン共重合体、塩化ビニリデン/メチルアクリレート共重合体等のポリビニル系樹脂等が挙げられる。 Examples of the metal include steel, stainless steel, aluminum, copper, nickel, chromium, and alloys thereof.
Examples of the glass include alkali glass, non-alkali glass, and quartz glass.
Examples of the plastic include polyolefin resins such as high density polyethylene, ultra high molecular weight polyethylene, isotactic polypropylene, syndiotactic polypropylene, and ethylene propylene copolymer resin, nylon 6 (N6), nylon 66 (N66), Nylon 46 (N46), Nylon 11 (N11), Nylon 12 (N12), Nylon 610 (N610), Nylon 612 (N612), Nylon 6/66 copolymer (N6 / 66), Nylon 6/66/610 Polymer (N6 / 66/610), nylon MXD6 (MXD6), nylon 6T, nylon 6 / 6T copolymer, nylon 66 / PP copolymer, polyamide 66 resin such as nylon 66 / PPS copolymer, polybutylene Terephthalate (PBT), polyethylene Rephthalate (PET), polyethylene isophthalate (PEI), PET / PEI copolymer, polyarylate (PAR), polybutylene naphthalate (PBN), liquid crystal polyester, polyoxyalkylene diimide diacid / polybutylene terephthalate copolymer, etc. Aromatic polyester resins, polyacrylonitrile (PAN), polymethacrylonitrile, acrylonitrile / styrene copolymer (AS), methacrylonitrile / styrene copolymer, methacrylonitrile / styrene / butadiene copolymer, etc. Resin, polycarbonate, polymethacrylate resin such as polymethyl methacrylate (PMMA), polyethyl methacrylate, ethylene / vinyl acetate copolymer (EVA), polyvinyl alcohol (PVA), vinyl alcohol And polyvinyl resins such as vinyl / ethylene copolymer (EVOH), polyvinylidene chloride (PVDC), polyvinyl chloride (PVC), vinyl chloride / vinylidene chloride copolymer, vinylidene chloride / methyl acrylate copolymer, and the like. .
更に、上記被着体としては、金属表面を不動態化処理することにより不動態皮膜を形成した材料も挙げられ、該不動態化処理としては、例えば、加熱処理、陽極酸化処理等が挙げられる。特に、国際アルミニウム合金名が6000番台の材質であるアルミニウム合金等の場合は、上記不動態化処理として硫酸アルマイト処理又はリン酸アルマイト処理を行うことで、接着性を向上させることができる。 Examples of the adherend include a composite material having a metal plating layer on the surface, and examples of the base material for plating the composite material include the metal, glass, and plastic described above.
Furthermore, examples of the adherend include materials in which a passivation film is formed by passivating a metal surface. Examples of the passivating treatment include heat treatment and anodizing treatment. . In particular, in the case of an aluminum alloy or the like whose material is an international aluminum alloy name in the 6000 series, the adhesiveness can be improved by performing a sulfuric acid alumite treatment or a phosphoric acid alumite treatment as the passivation treatment.
上記OD値は高いほど良いが、上記OD値を高くするために遮光剤を多く配合しすぎると、増粘による作業性の低下等が生じることから、遮光剤の配合量とのバランスをとるため、上記硬化体のOD値の好ましい上限は4である。
なお、上記光湿気硬化型樹脂組成物の硬化後のOD値は、光学濃度計を用いて測定することができる。 The cured body of the present invention preferably has an optical density (OD value) of 1 or more when the thickness is 1 mm. When the OD value is 1 or more, the effect of suppressing light leakage when used in a display element or the like is excellent, and high contrast can be obtained. The OD value is more preferably 1.5 or more.
The higher the OD value, the better. However, if too much light-shielding agent is blended to increase the OD value, workability will decrease due to thickening, so that it balances the blending amount of the light-shielding agent. The preferable upper limit of the OD value of the cured product is 4.
In addition, the OD value after hardening of the said optical moisture curable resin composition can be measured using an optical densitometer.
ポリオールとして100重量部のポリテトラメチレンエーテルグリコール(三菱化学社製、「PTMG-2000」)と、0.01重量部のジブチル錫ジラウレートとを500mL容のセパラブルフラスコに入れ、真空下(20mmHg以下)、100℃で30分間撹拌し、混合した。その後常圧とし、ジイソシアネートとして26.5重量部のPure MDI(日曹商事社製)を入れ、80℃で3時間撹拌し、反応させ、湿気硬化型ウレタン樹脂A(重量平均分子量2700)を得た。 (Synthesis Example 1 (Preparation of moisture-curing urethane resin A))
100 parts by weight of polytetramethylene ether glycol (“PTMG-2000”, manufactured by Mitsubishi Chemical Corporation) and 0.01 parts by weight of dibutyltin dilaurate were placed in a 500 mL separable flask as a polyol, and under vacuum (20 mmHg or less) ), And stirred at 100 ° C. for 30 minutes and mixed. After that, normal pressure was applied and 26.5 parts by weight of Pure MDI (manufactured by Nisso Shoji Co., Ltd.) was added as a diisocyanate, stirred at 80 ° C. for 3 hours and reacted to obtain a moisture-curable urethane resin A (weight average molecular weight 2700). It was.
ポリオールとして100重量部のポリテトラメチレンエーテルグリコール(三菱化学社製、「PTMG-2000」)と、0.01重量部のジブチル錫ジラウレートとを500mL容のセパラブルフラスコに入れ、真空下(20mmHg以下)、100℃で30分間撹拌し、混合した。その後常圧とし、ジイソシアネートとして26.5重量部のPure MDI(日曹商事社製)を入れ、80℃で3時間撹拌し、反応させ、湿気硬化型ウレタン樹脂B(重量平均分子量2900)を得た。 (Synthesis example 2 (production of moisture-curing urethane resin B))
100 parts by weight of polytetramethylene ether glycol (“PTMG-2000”, manufactured by Mitsubishi Chemical Corporation) and 0.01 parts by weight of dibutyltin dilaurate were placed in a 500 mL separable flask as a polyol, and under vacuum (20 mmHg or less) ), And stirred at 100 ° C. for 30 minutes and mixed. Thereafter, normal pressure was applied, and 26.5 parts by weight of Pure MDI (manufactured by Nissho Shoji Co., Ltd.) was added as a diisocyanate, and the mixture was stirred at 80 ° C. for 3 hours to be reacted to obtain a moisture curable urethane resin B (weight average molecular weight 2900). It was.
合成例1と同様にして得られた湿気硬化型ウレタン樹脂A100重量部の入った反応容器に、3-メルカプトプロピルトリメトキシシラン(信越化学工業社製、「KBM-803」)9.8重量部を添加し、80℃で1時間撹拌混合し、有機シリル基含有ウレタン樹脂として、分子末端にイソシアネート基とトリメトキシシリル基とを有する湿気硬化型ウレタン樹脂C(重量平均分子量3100)を得た。 (Synthesis Example 3 (Preparation of moisture-curing urethane resin C))
9.8 parts by weight of 3-mercaptopropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., “KBM-803”) was added to a reaction vessel containing 100 parts by weight of moisture-curable urethane resin A obtained in the same manner as in Synthesis Example 1. Was added and stirred at 80 ° C. for 1 hour to obtain a moisture curable urethane resin C (weight average molecular weight 3100) having an isocyanate group and a trimethoxysilyl group at the molecular end as an organic silyl group-containing urethane resin.
表1に記載された配合比に従い、各材料を、遊星式撹拌装置(シンキー社製、「あわとり練太郎」)にて撹拌した後、セラミック3本ロールにて均一に混合して実施例1~7、比較例1~3の光湿気硬化型樹脂組成物を得た。
得られた光湿気硬化型樹脂組成物の一部を、幅3mm、長さ50mm、高さ1mmのテフロン(登録商標)製の型枠に埋めた。その後、UV-LED(波長365nm)を用いて、紫外線を1000mJ/cm2照射することによって、光湿気硬化型樹脂組成物を光硬化させた後、25℃、50%RHの条件で3日(72時間以上)静置することにより湿気硬化させ、硬化体を得た。 (Examples 1 to 7, Comparative Examples 1 to 3)
In accordance with the blending ratio described in Table 1, each material was stirred with a planetary stirrer (“Shinky Co., Ltd.,“ Awatori Netaro ”), and then uniformly mixed with a ceramic three roll. To 7 and Comparative Examples 1 to 3 were obtained.
A part of the obtained light moisture curable resin composition was embedded in a Teflon (registered trademark) mold having a width of 3 mm, a length of 50 mm, and a height of 1 mm. Thereafter, UV-LED (wavelength 365 nm) was used to irradiate UV light at 1000 mJ / cm 2 to photocure the light moisture curable resin composition, and then for 3 days under conditions of 25 ° C. and 50% RH ( 72 hours or more) It was moisture-cured by standing to obtain a cured product.
実施例及び比較例で得られた各光湿気硬化型樹脂組成物及び各硬化体について以下の評価を行った。結果を表1に示した。 <Evaluation>
The following evaluation was performed about each optical moisture hardening type resin composition and each hardening body obtained by the Example and the comparative example. The results are shown in Table 1.
実施例及び比較例で得られた各硬化体をダンベル状(「JIS K 6251」で規定される6号形)に打ち抜いて得られた試験片を、25℃において引張試験機(島津製作所社製、「EZ-Graph」)を用いて5mm/minの速度で引張り、引張る前の4倍にまで伸長した時の力として硬化体の400%伸長時の引張強さを求めた。 (Tensile strength at 400% elongation of the cured product)
Test specimens obtained by punching the cured bodies obtained in Examples and Comparative Examples into dumbbell shapes (No. 6 as defined in “JIS K 6251”) were subjected to a tensile tester (manufactured by Shimadzu Corporation) at 25 ° C. , “EZ-Graph”), and the tensile strength at 400% elongation of the cured product was determined as the force when stretched to 4 times before stretching.
実施例及び比較例で得られた各硬化体をダンベル状(「JIS K 6251」で規定される6号形)に打ち抜いて得られた試験片を、25℃において引張試験機(島津製作所社製、「EZ-Graph」)を用いて5mm/minの速度で引張った際の破断点における伸度として硬化体の引張破断伸度を求めた。 (Tensile rupture elongation of cured product)
Test specimens obtained by punching the cured bodies obtained in Examples and Comparative Examples into dumbbell shapes (No. 6 as defined in “JIS K 6251”) were subjected to a tensile tester (manufactured by Shimadzu Corporation) at 25 ° C. , “EZ-Graph”), the tensile elongation at break of the cured product was determined as the elongation at break when it was pulled at a rate of 5 mm / min.
実施例及び比較例で得られた各光湿気硬化型樹脂組成物をポリカーボネート基板上に約1mmの幅で塗布し、UV-LED(波長365nm)を用いて、紫外線を1000mJ/cm2照射することによって、各光湿気硬化型樹脂組成物を光硬化させた後、ガラス基板を重ね、20gの重りを置き、25℃、50%RHの条件で3日(72時間以上)静置することにより光湿気硬化型樹脂組成物を湿気硬化させて試験片を得た。図1に試験片を上から見た場合を示す模式図(図1(a))、及び、試験片を横から見た場合を示す模式図(図1(b))を示した。得られた試験片を、25℃において引張試験機(島津製作所社製、「EZ-Graph」)を用いてせん断方向に10mm/minの速度で引張ることにより引張せん断接着強さを測定した。 (Adhesiveness (tensile shear adhesive strength))
Each of the light moisture curable resin compositions obtained in Examples and Comparative Examples is applied on a polycarbonate substrate with a width of about 1 mm, and irradiated with UV light at 1000 mJ / cm 2 using a UV-LED (wavelength 365 nm). Each photo-moisture curable resin composition is photocured, and then a glass substrate is stacked, a 20 g weight is placed, and light is left by standing at 25 ° C. and 50% RH for 3 days (72 hours or more). The moisture curable resin composition was moisture cured to obtain a test piece. The schematic diagram (FIG. 1 (a)) which shows the case where a test piece is seen from the top in FIG. 1 and the schematic diagram (FIG. 1 (b)) which shows the case where a test piece is seen from the side were shown. Tensile shear strength was measured by pulling the obtained test piece at 25 ° C. using a tensile tester (“EZ-Graph” manufactured by Shimadzu Corporation) at a rate of 10 mm / min in the shear direction.
実施例及び比較例で得られた各光湿気硬化型樹脂組成物30gを、口径4cmの濾過装置に150メッシュのフィルターを敷いて、0.2MPaの圧力で加圧濾過を行い、その通過時間を評価した。通過に必要な時間が30秒未満であった場合を「○」、通過に必要な時間が30秒以上5分未満であった場合を「△」、通過に必要な時間が5分以上であった場合を「×」として、光湿気硬化型樹脂組成物の塗布性(細孔通過性)を評価した。 (Applicability (pore penetration))
30 g of each light moisture curable resin composition obtained in Examples and Comparative Examples was laid with a 150-mesh filter on a 4 cm aperture filter, pressure filtered at a pressure of 0.2 MPa, and the passage time was determined. evaluated. “○” indicates that the time required for passage is less than 30 seconds, “△” indicates that the time required for passage is 30 seconds or more and less than 5 minutes, and the time required for passage is 5 minutes or more. In this case, the applicability (pore permeability) of the light moisture curable resin composition was evaluated.
実施例及び比較例で得られた各光湿気硬化型樹脂組成物を、ディスペンス装置を用いて、ポリカーボネート基板上に約1mmの幅で30mmの長さとなるように塗布した。次いで、UV-LED(波長365nm)を用いて、紫外線を3000mJ/cm2照射することによって、光湿気硬化型樹脂組成物を光硬化させ、線幅(t0)、高さ(t1)を測定した。t1/t0が0.3以上であった場合を「○」、t1/t0が0.3未満であった場合を「×」として、光湿気硬化型樹脂組成物の形状保持性を評価した。 (Shape retention)
Each optical moisture curable resin composition obtained in Examples and Comparative Examples was applied on a polycarbonate substrate so as to have a width of about 1 mm and a length of 30 mm using a dispensing apparatus. Next, the UV-LED (wavelength 365 nm) is irradiated with ultraviolet rays at 3000 mJ / cm 2 to photocur the optical moisture curable resin composition, and the line width (t 0 ) and height (t 1 ) are set. It was measured. The shape retention property of the light moisture curable resin composition is defined as “◯” when t 1 / t 0 is 0.3 or more, and “x” when t 1 / t 0 is less than 0.3. Evaluated.
上記「(接着性(引張せん断接着強さ))」と同様にして得られた各試験片を50℃、85%RHの恒温恒湿オーブンに入れ、試験片を地面に対して垂直にぶら下げ、ポリカーボネート基板の端に100gの重りを吊るし、24時間静置した。24時間静置後のガラス基板とポリカーボネート基板との初期位置(重りを吊るす前の位置)からのズレが1mm以下であった場合を「○」、1mmを超え3mm以下であった場合を「△」、3mmを超えた場合を「×」として、光湿気硬化型樹脂組成物の耐クリープ性を評価した。 (Creep resistance (reliability evaluation))
Each test piece obtained in the same manner as the above “(Adhesiveness (tensile shear adhesive strength))” was placed in a constant temperature and humidity oven at 50 ° C. and 85% RH, and the test piece was hung perpendicular to the ground. A weight of 100 g was hung on the end of the polycarbonate substrate and left to stand for 24 hours. When the deviation from the initial position (position before suspending the weight) between the glass substrate and the polycarbonate substrate after standing for 24 hours is 1 mm or less, “◯”, and when the deviation exceeds 1 mm and 3 mm or less, “△ The creep resistance of the light moisture curable resin composition was evaluated with “x” when exceeding 3 mm.
2 ガラス基板
3 光湿気硬化型樹脂組成物硬化体 1
Claims (9)
- ラジカル重合性化合物と湿気硬化型樹脂とを含有する光湿気硬化型樹脂組成物の硬化体であって、
25℃における400%伸長時の引張強さが3kgf/cm2以上、20kgf/cm2以下である
ことを特徴とする硬化体。 A cured product of a light moisture curable resin composition containing a radical polymerizable compound and a moisture curable resin,
A cured product having a tensile strength at 400% elongation at 25 ° C. of 3 kgf / cm 2 or more and 20 kgf / cm 2 or less. - 25℃における引張破断伸度が500%以上であることを特徴とする請求項1記載の硬化体。 The cured product according to claim 1, wherein the tensile elongation at break at 25 ° C is 500% or more.
- 25℃においてJIS K 6850に準拠して測定されるポリカーボネート及びガラスに対する引張せん断接着強さが10kgf/cm2以上であることを特徴とする請求項1又は2記載の硬化体。 The cured body according to claim 1 or 2, wherein a tensile shear adhesive strength to polycarbonate and glass measured at 25 ° C according to JIS K 6850 is 10 kgf / cm 2 or more.
- 湿気硬化型樹脂は、湿気硬化型ウレタン樹脂であることを特徴とする請求項1、2又は3記載の硬化体。 The cured product according to claim 1, 2 or 3, wherein the moisture curable resin is a moisture curable urethane resin.
- 充填剤を含有することを特徴とする請求項1、2、3又は4記載の硬化体。 The cured product according to claim 1, 2, 3, or 4, characterized by containing a filler.
- 遮光剤を含有することを特徴とする請求項1、2、3、4又は5記載の硬化体。 The light-curing agent is contained, The hardening body of Claim 1, 2, 3, 4 or 5 characterized by the above-mentioned.
- 基板と請求項1、2、3、4、5又は6記載の硬化体とを有することを特徴とする電子部品。 An electronic component comprising a substrate and the cured body according to claim 1, 2, 3, 4, 5 or 6.
- 基板と請求項1、2、3、4、5又は6記載の硬化体とを有することを特徴とする表示素子。 A display element comprising a substrate and the cured body according to claim 1, 2, 3, 4, 5 or 6.
- ラジカル重合性化合物と湿気硬化型樹脂とを含有する光湿気硬化型樹脂組成物であって、硬化体の25℃における400%伸張時の引張強さが3~20kgf/cm2となることを特徴とする光湿気硬化型樹脂組成物。 An optical moisture curable resin composition containing a radical polymerizable compound and a moisture curable resin, wherein the tensile strength at 400% elongation of the cured product at 25 ° C. is 3 to 20 kgf / cm 2. A light moisture curable resin composition.
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PCT/JP2016/061958 WO2016167305A1 (en) | 2015-04-17 | 2016-04-14 | Cured body, electronic component, display element, and light-/moisture-curable resin composition |
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JP (2) | JP6698524B2 (en) |
KR (1) | KR102260532B1 (en) |
CN (1) | CN107108772A (en) |
TW (1) | TWI701310B (en) |
WO (1) | WO2016167305A1 (en) |
Cited By (6)
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US20170335144A1 (en) * | 2016-03-07 | 2017-11-23 | Nitto Denko Corporation | Optical adhesive sheet, polarizing film with adhesive layer and liquid crystal display device |
JP2018173613A (en) * | 2017-03-31 | 2018-11-08 | シチズンファインデバイス株式会社 | Image display device and method for manufacturing the same |
WO2019203277A1 (en) * | 2018-04-19 | 2019-10-24 | 積水化学工業株式会社 | Curable resin composition, cured body, electronic part and assembly part |
WO2020241803A1 (en) * | 2019-05-30 | 2020-12-03 | 積水化学工業株式会社 | Curable resin composition, cured object, and electronic component |
WO2022004416A1 (en) * | 2020-06-29 | 2022-01-06 | 積水化学工業株式会社 | Photo/moisture curable resin composition and cured body |
WO2022114186A1 (en) * | 2020-11-30 | 2022-06-02 | 積水化学工業株式会社 | Moisture-curable resin composition and adhesive for electronic appliance |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102574109B1 (en) * | 2022-10-18 | 2023-09-06 | (주)중앙종합안전기술연구원 | Crack width measuring device for safety inspection and diagnosis of structures |
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- 2016-04-14 CN CN201680003536.6A patent/CN107108772A/en active Pending
- 2016-04-14 KR KR1020177007155A patent/KR102260532B1/en active IP Right Grant
- 2016-04-14 WO PCT/JP2016/061958 patent/WO2016167305A1/en active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
CN107108772A (en) | 2017-08-29 |
JP6698524B2 (en) | 2020-05-27 |
TWI701310B (en) | 2020-08-11 |
JP2020111764A (en) | 2020-07-27 |
TW201704394A (en) | 2017-02-01 |
KR102260532B1 (en) | 2021-06-03 |
JPWO2016167305A1 (en) | 2018-02-15 |
KR20170137691A (en) | 2017-12-13 |
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