WO2011148627A1 - エステル化物の製造方法 - Google Patents
エステル化物の製造方法 Download PDFInfo
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- WO2011148627A1 WO2011148627A1 PCT/JP2011/002905 JP2011002905W WO2011148627A1 WO 2011148627 A1 WO2011148627 A1 WO 2011148627A1 JP 2011002905 W JP2011002905 W JP 2011002905W WO 2011148627 A1 WO2011148627 A1 WO 2011148627A1
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- alkene
- carbon atoms
- alcohol
- copolymer
- esterified product
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Definitions
- the present invention relates to a method for producing an esterified product.
- it is related with the manufacturing method of the esterified material used for the sealing material of a semiconductor element.
- the esterified product is useful as an additive for improving continuous moldability and reflow resistance.
- Such an esterified product can be synthesized from a polymer of acid anhydride and 1-alkene and alcohol (Patent Document 1).
- the sulfonic acids can be removed by washing the reaction product, the removal by washing is complicated in its operation and it cannot be said that the removal efficiency of the sulfonic acids is high.
- low molecular weight esterified substances and 1-alkenes involved in reflow resistance and releasability necessary for sealing a semiconductor element may be removed.
- the present invention has been made in view of such a situation, and provides a method for producing an esterified compound that is excellent in purification efficiency and is useful as a sealing material for semiconductor elements.
- a process of obtaining a copolymer by copolymerizing a 1-alkene having 5 to 80 carbon atoms and maleic anhydride, the copolymer and an alcohol having 5 to 25 carbon atoms are mixed with trifluoromethane.
- a method for producing an esterified product comprising a step of performing an esterification reaction in the presence of a sulfonic acid to obtain a reaction mixture containing an esterified product containing at least one repeating unit selected from formulas (c) to (f). Provided.
- R represents an aliphatic hydrocarbon group having 3 to 78 carbon atoms
- R 2 represents a hydrocarbon group having 5 to 25 carbon atoms
- m represents the 1-alkene
- X represents the copolymerization molar ratio X / Y of maleic anhydride (Y), which is 1/2 to 10/1
- n is an integer of 1 or more.
- the method further includes a step of removing free trifluoromethanesulfonic acid by a reduced pressure treatment after the step of obtaining a reaction mixture containing an esterified product.
- the reaction mixture contains the 1-alkene having 5 to 80 carbon atoms.
- the content of the 1-alkene having 5 to 80 carbon atoms in the reaction mixture, as measured by GPC, is 8 area% or more and 20 area% or less.
- the 1-alkene is a 1-alkene having 28 to 60 carbon atoms.
- the alcohol is stearyl alcohol.
- the trifluoromethanesulfonic acid is in an amount of 100 ppm or more and 1000 ppm or less with respect to the total mass of the copolymer and the alcohol having 5 to 25 carbon atoms.
- a reaction mixture in which the content of a sulfonic acid component is reduced is obtained by using trifluoromethanesulfonic acid as a catalyst in the reaction between a polymer of acid anhydride and 1-alkene and an alcohol.
- an efficient production method of the esterified product is realized. That is, since it is not necessary to remove the sulfonic acid component, the esterified product can be obtained efficiently without being accompanied by a decrease in work efficiency due to the removal of the sulfonic acid component. Further, trifluoromethanesulfonic acid can be removed by distillation under reduced pressure as necessary. For this reason, a reaction mixture in which the content of the sulfonic acid component is sufficiently reduced can be obtained.
- the esterified product thus obtained is used as a sealing material for a semiconductor element, it is possible to reduce the occurrence of defects such as poor insulation of the semiconductor element due to the sulfonic acid component.
- the method for producing an esterified product of the present invention includes the following steps. (A) a step of copolymerizing 1-alkene having 5 to 80 carbon atoms with maleic anhydride to obtain a copolymer; and (b) the copolymer obtained in step (a), A step of esterifying 25 alcohols in the presence of trifluoromethanesulfonic acid to obtain a reaction mixture containing an esterified product containing at least one repeating unit selected from formulas (c) to (f).
- R represents an aliphatic hydrocarbon group having 3 to 78 carbon atoms
- R 2 represents a hydrocarbon group having 5 to 25 carbon atoms
- m represents the 1-alkene
- X represents the copolymerization molar ratio X / Y of maleic anhydride (Y) and is from 1/2 to 10/1
- n is an integer of 1 or more.
- Examples of the 1-alkene having 5 to 80 carbon atoms used in the step (a) include 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-octadecene, 1-eicosene, 1-docosene, 1-tetracontane, 1-hexacontene, 1-octacosene, 1-triacontene, 1-hentriaconten, 1-dotriacontene, 1-tritriacontene, 1-tetratriacontene, 1-penta Triacontene, 1-hexatriatain, 1-tetracontane, 1-hentetraconten, 1-detetraconten, 1-tritetraconten, 1-tetratetraconten, 1-pentaconten, 1-henpentaconten, 1 -Dopentacontene, 1-Tripentaconten, 1-pentapentaten, 1-hexaconten Linear 1-al
- the carbon number of 1-alkene is more preferably 10 to 70 carbon atoms from the viewpoint of adhesion to the lead frame provided in the semiconductor element, when the resulting ester compound is used as a sealing material for the semiconductor element. From the viewpoint, 28 to 60 carbon atoms are more preferable.
- Examples of the copolymer of 1-alkene having 5 to 80 carbon atoms and maleic anhydride obtained in the step (a) include compounds having structures represented by the formulas (9) and (10).
- Commercially available products include Diacarna (registered trademark) 30 (trade name, manufactured by Mitsubishi Chemical Corporation) using 1-octaccocene, 1-triacontene, 1-tetracontene, 1-pentacontene, 1-hexacontene, etc. as raw materials. ).
- R represents an aliphatic hydrocarbon group having 3 to 78 carbon atoms, and n is an integer of 1 or more.
- m represents the copolymerization ratio of 1-alkene and maleic anhydride, and is not particularly limited. However, when 1-alkene is X mol and maleic anhydride is Y mol, X / Y, that is, m is 1 / 2 to 10/1, preferably 1/2 to 5/1, more preferably 1/2 to 2/1, and still more preferably about 1/1 of approximately equimolar amount.
- the method for producing a copolymer of 1-alkene and maleic anhydride is not particularly limited, and a general copolymerization method such as reaction of raw materials can be used.
- an organic solvent in which 1-alkene and maleic anhydride can be dissolved may be used.
- an organic solvent Toluene is preferable and an aromatic solvent, an ether solvent, a halogen-type solvent etc. can also be used.
- the reaction temperature varies depending on the type of organic solvent used, but is preferably 50 to 200 ° C., more preferably 100 to 150 ° C. from the viewpoint of reactivity and productivity.
- the reaction time is not particularly limited as long as a copolymer can be obtained, but it is preferably 1 to 30 hours, more preferably 2 to 15 hours, and further preferably 4 to 10 hours from the viewpoint of productivity.
- unreacted components, solvents and the like can be removed as necessary under heating and reduced pressure.
- the conditions are as follows: temperature is 100 to 220 ° C., more preferably 120 to 180 ° C., pressure is 13.3 ⁇ 10 3 Pa or less, more preferably 8 ⁇ 10 3 Pa or less, and time is 0.5 to 10 hours. It is preferable.
- a radical polymerization initiator such as azobisisobutyronitrile (AIBN) or benzoyl peroxide (BPO) may be added to the reaction as necessary.
- AIBN azobisisobutyronitrile
- BPO benzoyl peroxide
- the copolymer obtained in step (a) is esterified using alcohol having 5 to 25 carbon atoms in the presence of trifluoromethanesulfonic acid in step (b).
- Examples of the alcohol having 5 to 25 carbon atoms used in the step (b) include pentyl alcohol, hexyl alcohol, octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, eicosyl alcohol, behenyl alcohol, Linear or branched aliphatic saturated alcohols such as 2-methyl-decan-1-ol, 2-ethyl-decan-1-ol, 2-hexyl-octane-1-ol, hexenol, 2-hexene- Examples include linear or branched aliphatic unsaturated alcohols such as 1-ol, 1-hexen-3-ol, pentenol, 2-methyl-1-pentenol, and the like.
- a combination of the above may also be used.
- a linear alcohol having 10 to 25 carbon atoms is preferable from the viewpoint of releasability when the obtained esterified product is used as a sealing material for a semiconductor element, and from the viewpoint of continuous moldability, 15-20 straight chain aliphatic saturated alcohols are more preferred. If the carbon number of the alcohol is less than the lower limit, the continuous moldability (releasability) is inferior, and if it exceeds the upper limit, the adhesion of the semiconductor element to the copper lead frame tends to decrease.
- the amount of trifluoromethanesulfonic acid is preferably 100 ppm or more and 1000 ppm or less with respect to the total mass of the copolymer and alcohol in order to exhibit its performance. If the lower limit is not reached, the esterification catalyst does not function sufficiently, and if the upper limit is exceeded, the resulting esterified product may be oxidized. When an oxide of an esterified product is used as a sealing material for a semiconductor element, the continuous moldability tends to decrease.
- the molar ratio of the copolymer obtained in step (a) to the alcohol having 5 to 25 carbon atoms is not particularly limited and can be arbitrarily set. However, by adjusting the reaction molar ratio, Since it is possible to control the degree of hydrophilicity, it is preferable to set appropriately according to the semiconductor sealing material to be applied.
- an organic solvent in which 1-alkene and maleic anhydride can be dissolved may be used. Although there is no restriction
- the reaction temperature varies depending on the type of organic solvent used, but is preferably 50 to 200 ° C., more preferably 120 to 170 ° C. from the viewpoint of reactivity and productivity.
- the reaction time is not particularly limited as long as a copolymer can be obtained, but it is preferably 1 to 30 hours, more preferably 2 to 30 hours, still more preferably 4 to 28 hours from the viewpoint of productivity.
- unreacted components, solvents and the like can be removed as necessary under heating and reduced pressure.
- the conditions are as follows: temperature is 100 to 220 ° C., more preferably 120 to 180 ° C., pressure is 13.3 ⁇ 10 3 Pa or less, more preferably 8 ⁇ 10 3 Pa or less, and time is 0.5 to 10 hours. It is preferable.
- the esterified product obtained by esterifying a copolymer of 1-alkene and maleic anhydride with the above alcohol having 5 to 25 carbon atoms is at least one repeating compound selected from formulas (c) to (f) Includes units.
- R represents an aliphatic hydrocarbon group having 3 to 78 carbon atoms
- R 2 represents a hydrocarbon group having 5 to 25 carbon atoms
- m represents the 1-alkene (X )
- Y maleic anhydride copolymerization molar ratio X / Y, which is 1/2 to 10/1
- n is an integer of 1 or more.
- the esterified product of the present invention includes (1) one containing any one of formulas (c) to (f) in the main chain skeleton, and (2) the formula (c) to (f) in the main chain skeleton. Any two or more of them may be included randomly, regularly, or in a block form. These may be used alone or as a mixture of two or more.
- the reaction yield of the esterification reaction between the copolymer and alcohol is preferably 70 mol% or more, more preferably 80 mol% or more, and further preferably 90% or more.
- the reaction mixture containing the esterified product obtained in the step (b) may contain a 1-alkene present unreacted in the step (a).
- the content ratio of 1-alkene in the reaction mixture is preferably 8% by mass or more and 20% by mass or less as measured by GPC. The effect which improves a mold release property is acquired as a content rate is more than the said lower limit. When the content ratio is less than or equal to the above upper limit value, there is little risk of causing a decrease in adhesiveness.
- the number average molecular weight of the esterified product obtained by the method of the present invention is preferably 2000 to 10,000. If it is the said range, when esterified substance is used as a sealing material of a semiconductor, coexistence with the adhesiveness with respect to the copper lead frame of a semiconductor element and mold release property is realizable.
- the compounding amount of a compound obtained by esterifying a copolymer of 1-alkene and maleic anhydride with an alcohol in the presence of trifluoromethanesulfonic acid is not particularly limited, but is 0.5% with respect to 100 parts by mass of the epoxy resin. It is preferably no less than 10 parts by mass and more preferably no greater than 1 part by mass and no greater than 5 parts by mass. If the blending amount is less than the above lower limit value, the releasability tends to decrease, and if it exceeds the above upper limit value, the adhesion to the copper lead frame in which oxidation has progressed tends to be insufficient.
- step (b) after step (b), if necessary, free trifluoromethanesulfonic acid in the reaction mixture obtained in step (b) may be removed by reduced pressure treatment. Since the content of trifluoromethanesulfonic acid can be reduced by the above method, the reactive organism containing the esterified product obtained in the step (b) is used as a semiconductor encapsulant, and the adhesion of the semiconductor element to the copper lead frame And releasability is good.
- the liquid temperature was cooled to 120 ° C., and distilled under reduced pressure for 2 hours under a reduced pressure of 30 Torr to remove free trifluoromethanesulfonic acid and water, and 144 g of esterified product A was obtained. From the GPC measurement results, the 1-alkene content in the esterified product A was 15% by mass. The sulfur content of the esterified product A was 74 ppm.
- Example 1 The esterified product A obtained in Synthesis Example 1 and the components shown in the following table are blended in the parts by mass shown in the table, and biaxially kneaded at a kneading temperature of 100 ° C. and a kneading time of 30 minutes, and then cooled and pulverized. Then, a resin composition was produced. The obtained resin composition was evaluated for performance (continuous moldability) as a semiconductor sealing material. The results are shown in Table 1.
- Epoxy resin 1 Biphenyl type epoxy resin having an epoxy equivalent of 185 g / eq and a melting point of 108 ° C. (trade name Epicoat YX-4000K manufactured by Japan Epoxy Co., Ltd.)
- Epoxy resin 2 Phenol aralkyl type epoxy resin having a phenylene skeleton having an epoxy equivalent of 237 g / eq and a softening point of 52 ° C.
- Phenol resin-based curing agent 1 phenol aralkyl type phenol resin having a biphenylene skeleton having a hydroxyl group equivalent of 199 g / eq and a softening point of 64 ° C.
- Inorganic filler 1 Spherical fused silica having an average particle size of 10.8 ⁇ m and a specific surface area of 5.1 m 2 / g
- Colorant 1 Carbon black (trade name carbon # 5 manufactured by Mitsubishi Chemical Corporation)
- the measuring method of continuous formability is as follows. Using a low-pressure automatic transfer molding machine (Daiichi Seiko Co., Ltd., GP-ELF), chips and the like are formed with an epoxy resin composition under conditions of a mold temperature of 175 ° C., an injection pressure of 9.8 MPa, and a curing time of 70 seconds. Sealed 80 pink quad flat package (80pQFP; copper lead frame, package outer dimensions: 14mm x 20mm x 2mm thickness, pad size: 6.5mm x 6.5mm, chip size 6.0mm x 6.0mm x 0.00mm Molding to obtain a thickness of 35 mm was continuously performed up to 400 shots.
- GP-ELF low-pressure automatic transfer molding machine
- a preferable order is the order of A, B, C...
- the evaluation results are shown below.
- a preferable order is the order of A, B, C...
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Abstract
Description
(式(c)~(f)中、Rは炭素数3~78の脂肪族炭化水素基を示し、R2は炭素数5~25の炭化水素基を示し、mは、前記1-アルケン(X)と前記無水マレイン酸(Y)の共重合モル比X/Yを示し、1/2~10/1であり、nは1以上の整数である。)
本発明のエステル化物の製造方法は、以下の工程を含む。
(a)炭素数5~80の1-アルケンと無水マレイン酸とを共重合して共重合物を得る工程;および
(b)工程(a)で得られた共重合物と、炭素数5~25のアルコールとを、トリフルオロメタンスルホン酸の存在下でエステル化反応させて、式(c)~(f)から選択される少なくとも1つの繰り返し単位を含むエステル化物を含有する反応混合物を得る工程。
(式(c)~(f)中、Rは炭素数3~78の脂肪族炭化水素基を示し、R2は炭素数5~25の炭化水素基を示し、mは、上記1-アルケン(X)と上記無水マレイン酸(Y)の共重合モル比X/Yを示し、1/2~10/1であり、nは1以上の整数である。)
炭素数28~60の1-アルケンと無水マレイン酸との共重合物(ダイヤカルナR30、三菱化学株式会社製)100.0g、およびステアリルアルコール47.0gを、300mlの4つ口セパラブルフラスコに仕込み、70℃で溶解させた後に、10wt%トリフルオロメタンスルホン酸水溶液0.5gを添加した。得られた反応混合物を150℃で5時間攪拌した。
その後、液温を120℃まで冷却して、30Torrの減圧下で、2時間減圧蒸留することにより、遊離のトリフルオロメタンスルホン酸と水を除去して、エステル化物Aを144g得た。GPC測定結果から、エステル化物A中の1-アルケン含有量は15質量%であった。またエステル化物Aの硫黄含有量は74ppmであった。
炭素数28~60の1-アルケンと無水マレイン酸との共重合物(ダイヤカルナR30、三菱化学株式会社製)100.0g、およびステアリルアルコール47.0gを、300mlの4つ口セパラブルフラスコに仕込み、70℃で溶解させた後に、p-トルエンスルホン酸一水和物1.5gを添加した。得られた反応混合物を150℃で4時間攪拌した。
その後、液温を80℃まで冷却して、アセトン131.7gを還流下で60分間かけて滴下した。滴下後は攪拌を止め、液温70℃で60分間静置させると、反応母液が2層に分離した。未反応のステアリルアルコールおよびスルホン酸成分を含む上層のアセトン層は除去した。残る下層を30Torrの減圧下で、90℃で6時間減圧留去を行うことにより、残存するアセトンを除去して、エステル化物Bを144g得た。GPC測定結果から、エステル化物B中の1-アルケン含有量は10質量%であった。またエステル化物Bの硫黄含有量は800ppmであった。
炭素数28~60の1-アルケンと無水マレイン酸との共重合物(ダイヤカルナR30、三菱化学株式会社製)100.0g、およびステアリルアルコール47.0gを、コンデンサーを装着した300mlの4つ口セパラブスフラスコに仕込み、70℃で溶解させた後に、p-トルエンスルホン酸一水和物1.5gを添加した。得られた反応混合物を150℃で4時間攪拌した。
その後、液温を80℃まで冷却して、アセトン131.7gを還流下で60分間かけて滴下した。滴下後は攪拌を止め、液温70℃で60分間静置させると、反応母液が2層に分離した。未反応のステアリルアルコールおよびスルホン酸成分を含む上層のアセトン層は除去した。この洗浄操作を3回行った後、残る下層を30Torrの減圧下で、90℃で6時間減圧留去を行うことにより、残存するアセトンを除去して、エステル化物Cを135g得た。GPC測定結果から、エステル化物C中の1-アルケン含有量は7質量%であった。またエステル化物Cの硫黄含有量は400ppmであった。
(実施例1)
上記合成例1で得られたエステル化物A、および以下の表に示す成分を、表に示す質量部で配合し、混練温度100℃、混練時間30分の条件で二軸混練して冷却後粉砕し、樹脂組成物を作製した。得られた樹脂組成物を、半導体封止材としての性能(連続成形性)について評価した。結果を表1に示す。
(比較例1~2)
上記合成例2および3で得られたエステル化物BおよびC、および以下の表に示す成分を、表に示す質量部で配合し、混練温度100℃、混練時間30分の条件で二軸混練して冷却後粉砕し、樹脂組成物を作製した。得られた樹脂組成物を、半導体封止材としての性能(連続成形性)について評価した。結果を表1に示す。
エポキシ樹脂1:エポキシ当量185g/eq、融点108℃のビフェニル型エポキシ樹脂(ジャパンエポキシ株式会社製商品名エピコートYX-4000K)
エポキシ樹脂2:エポキシ当量237g/eq、軟化点52℃のフェニレン骨格を有するフェノールアラルキル型エポキシ樹脂(日本化薬製商品名NC2000)
フェノール樹脂系硬化剤1:水酸基当量199g/eq、軟化点64℃のビフェニレン骨格を有するフェノールアラルキル型フェノール樹脂(明和化成株式会社製商品名MEH-7851SS)
無機充填材1:平均粒径10.8μm、比表面積5.1m2/gの球状溶融シリカ
硬化促進剤1:トリフェニルホスフィンとp-ベンゾキノンとの付加物
カップリング剤1:γ-グリシドキシプロピルトリメトキシシラン(チッソ製商品名S510=GPS-M)
着色剤1:カーボンブラック(三菱化学株式会社製商品名カーボン#5)
低圧トランスファー自動成形機(第一精工(株)製、GP-ELF)を用いて、金型温度175℃、注入圧力9.8MPa、硬化時間70秒の条件で、エポキシ樹脂組成物によりチップなどを封止して80ピンクワッドフラットパッケージ(80pQFP;銅製リードフレーム、パッケージ外寸:14mm×20mm×2mm厚、パッドサイズ:6.5mm×6.5mm、チップサイズ6.0mm×6.0mm×0.35mm厚)を得る成形を、連続で400ショットまで行った。
エアベントブロックの評価については、50ショット毎に金型を目視により観察することで、エアベントブロック(エアベント(幅0.5mm、厚さ50μm)部に樹脂硬化物が固着してエアベントを塞いだ状態)の有無を確認し、次の4段階で評価した。好ましい順は、A、B、C・・・の順であるが、Cランク以上であれば実用可能範囲である。評価結果を下記に示した。
A:400ショットまで問題なし
B:300ショットまでにエアベントブロック発生
C:200ショットまでにエアベントブロック発生
D:100ショットまでにエアベントブロック発生
型汚れについては、400ショット成形後の金型を観察し、ゲート口からの汚れの広がり具合の程度から、次の5段階で評価した。好ましい順は、A、B、C・・・の順であるが、Cランク以上であれば実用可能範囲である。
A:汚れなし
B:汚れの広がりがキャビティ表面の20面積%以下
C:汚れの広がりがキャビティ表面の20面積%超~40面積%以下
D:汚れの広がりがキャビティ表面の40面積%超~60面積%以下
E:汚れの広がりがキャビティ表面の60面積%超
Claims (7)
- エステル化物を含有する反応混合物を得る前記工程の後に、遊離トリフルオロメタンスルホン酸を減圧処理により除去する工程をさらに含む、請求項1に記載の方法。
- 前記反応混合物が、前記炭素数5~80の1-アルケンを含有する、請求項1に記載の方法。
- GPCにより測定される、前記反応混合物中の前記炭素数5~80の1-アルケンの含有割合が、8質量%以上、20質量%以下である、請求項3に記載の方法。
- 前記1-アルケンが、炭素数28~60の1-アルケンである、請求項1に記載の方法。
- 前記アルコールが、ステアリルアルコールである、請求項1に記載の方法。
- 前記トリフルオロメタンスルホン酸が、前記共重合物と前記炭素数5~25のアルコールとの全質量に対し、100ppm以上、1000ppm以下の量である、請求項1に記載の方法。
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Also Published As
Publication number | Publication date |
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CN102918106A (zh) | 2013-02-06 |
KR20130124175A (ko) | 2013-11-13 |
TW201211076A (en) | 2012-03-16 |
CN104250313A (zh) | 2014-12-31 |
US20130059983A1 (en) | 2013-03-07 |
JP5782434B2 (ja) | 2015-09-24 |
CN103080144A (zh) | 2013-05-01 |
CN103080144B (zh) | 2015-02-25 |
WO2011148628A1 (ja) | 2011-12-01 |
KR101835902B1 (ko) | 2018-03-07 |
TWI499629B (zh) | 2015-09-11 |
JPWO2011148628A1 (ja) | 2013-07-25 |
CN102918106B (zh) | 2015-09-16 |
TWI520972B (zh) | 2016-02-11 |
US9070628B2 (en) | 2015-06-30 |
KR20130113335A (ko) | 2013-10-15 |
SG185503A1 (en) | 2012-12-28 |
JPWO2011148627A1 (ja) | 2013-07-25 |
US8648479B2 (en) | 2014-02-11 |
SG185505A1 (en) | 2012-12-28 |
US20130062748A1 (en) | 2013-03-14 |
KR101756499B1 (ko) | 2017-07-10 |
TW201211138A (en) | 2012-03-16 |
JP5874633B2 (ja) | 2016-03-02 |
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