CN118139929A - 导电性组合物 - Google Patents
导电性组合物 Download PDFInfo
- Publication number
- CN118139929A CN118139929A CN202280070964.6A CN202280070964A CN118139929A CN 118139929 A CN118139929 A CN 118139929A CN 202280070964 A CN202280070964 A CN 202280070964A CN 118139929 A CN118139929 A CN 118139929A
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- CN
- China
- Prior art keywords
- polyamine
- polyol
- conductive composition
- less
- conductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000203 mixture Substances 0.000 title claims abstract description 60
- 229920000768 polyamine Polymers 0.000 claims abstract description 72
- 229920005862 polyol Polymers 0.000 claims abstract description 64
- 150000003077 polyols Chemical class 0.000 claims abstract description 59
- 239000002245 particle Substances 0.000 claims abstract description 45
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 30
- 239000001257 hydrogen Substances 0.000 claims abstract description 30
- 239000012948 isocyanate Substances 0.000 claims abstract description 21
- 150000001412 amines Chemical class 0.000 claims abstract description 20
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 26
- -1 i.e. Polymers 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 description 24
- 239000000853 adhesive Substances 0.000 description 23
- 230000001070 adhesive effect Effects 0.000 description 23
- 238000000034 method Methods 0.000 description 17
- 125000003118 aryl group Chemical group 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 11
- 229920005906 polyester polyol Polymers 0.000 description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 239000002981 blocking agent Substances 0.000 description 8
- 239000005056 polyisocyanate Substances 0.000 description 8
- 229920001228 polyisocyanate Polymers 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000004417 polycarbonate Substances 0.000 description 7
- 229920000515 polycarbonate Polymers 0.000 description 7
- 229920000570 polyether Polymers 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000004721 Polyphenylene oxide Substances 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 125000003277 amino group Chemical group 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 125000002723 alicyclic group Chemical group 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 4
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 4
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical class OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
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- 239000000376 reactant Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000004448 titration Methods 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920003232 aliphatic polyester Polymers 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
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- 239000004814 polyurethane Substances 0.000 description 3
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- 239000005060 rubber Substances 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 description 2
- 230000000397 acetylating effect Effects 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WTFAGPBUAGFMQX-UHFFFAOYSA-N 1-[2-[2-(2-aminopropoxy)propoxy]propoxy]propan-2-amine Chemical compound CC(N)COCC(C)OCC(C)OCC(C)N WTFAGPBUAGFMQX-UHFFFAOYSA-N 0.000 description 1
- LIPRQQHINVWJCH-UHFFFAOYSA-N 1-ethoxypropan-2-yl acetate Chemical compound CCOCC(C)OC(C)=O LIPRQQHINVWJCH-UHFFFAOYSA-N 0.000 description 1
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 1
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- GIEMHYCMBGELGY-UHFFFAOYSA-N 10-undecen-1-ol Chemical compound OCCCCCCCCCC=C GIEMHYCMBGELGY-UHFFFAOYSA-N 0.000 description 1
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 description 1
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 description 1
- QJQZRLXDLORINA-UHFFFAOYSA-N 2-cyclohexylethanol Chemical compound OCCC1CCCCC1 QJQZRLXDLORINA-UHFFFAOYSA-N 0.000 description 1
- WRMNZCZEMHIOCP-UHFFFAOYSA-N 2-phenylethanol Chemical compound OCCC1=CC=CC=C1 WRMNZCZEMHIOCP-UHFFFAOYSA-N 0.000 description 1
- VRWJZGHUCOFGPZ-UHFFFAOYSA-N 2-{[4-(4-pyridin-4-yl-1h-pyrazol-3-yl)phenoxy]methyl}quinoline Chemical compound C=1C=C2C=CC=CC2=NC=1COC(C=C1)=CC=C1C1=NNC=C1C1=CC=NC=C1 VRWJZGHUCOFGPZ-UHFFFAOYSA-N 0.000 description 1
- OFQCJVVJRNPSET-UHFFFAOYSA-N 3,5-dimethyl-4-nitro-1h-pyrazole Chemical compound CC1=NNC(C)=C1[N+]([O-])=O OFQCJVVJRNPSET-UHFFFAOYSA-N 0.000 description 1
- AUKXIVWAZJMPLL-UHFFFAOYSA-N 3-(2-ethylhexoxy)-3-oxopropanoic acid Chemical compound CCCCC(CC)COC(=O)CC(O)=O AUKXIVWAZJMPLL-UHFFFAOYSA-N 0.000 description 1
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 1
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 description 1
- TWHYGPFXAZAPIG-UHFFFAOYSA-N 3-o-butyl 1-o-methyl propanedioate Chemical compound CCCCOC(=O)CC(=O)OC TWHYGPFXAZAPIG-UHFFFAOYSA-N 0.000 description 1
- AOFIWCXMXPVSAZ-UHFFFAOYSA-N 4-methyl-2,6-bis(methylsulfanyl)benzene-1,3-diamine Chemical compound CSC1=CC(C)=C(N)C(SC)=C1N AOFIWCXMXPVSAZ-UHFFFAOYSA-N 0.000 description 1
- XKVUYEYANWFIJX-UHFFFAOYSA-N 5-methyl-1h-pyrazole Chemical compound CC1=CC=NN1 XKVUYEYANWFIJX-UHFFFAOYSA-N 0.000 description 1
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- 239000009261 D 400 Substances 0.000 description 1
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- ABPUBUORTRHHDZ-UHFFFAOYSA-N [4-(aminomethyl)-3-bicyclo[2.2.1]heptanyl]methanamine Chemical compound C1CC2(CN)C(CN)CC1C2 ABPUBUORTRHHDZ-UHFFFAOYSA-N 0.000 description 1
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- 229910052797 bismuth Inorganic materials 0.000 description 1
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- 235000014113 dietary fatty acids Nutrition 0.000 description 1
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Abstract
提供一种导电性组合物以及使用其的电子设备,所述导电性组合物可在低温下形成导电性和粘合性优异的、柔软的固化物。一种导电性组合物,其特征在于,含有多元醇、聚胺、封闭型异氰酸酯和导电性粒子,所述聚胺的活性氢当量为80g/eq以上、200g/eq以下,且胺值为150KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下。
Description
技术领域
本发明涉及具有柔软性的导电性组合物和电子设备。
背景技术
伴随着电子设备的用途扩大,柔性混合电子产品(以下称FHE)的开发正在进行。FHE中,在柔性基材上形成的布线上安装芯片、电容器等半导体部件。由于半导体部件为刚性而不能变形,因而作为在半导体部件与布线的连接部,要求一种在基材变形时也能维持部件的连接,能追随变形的柔软而低弹性的导电性粘合剂。
作为FHE中的柔性基材,有时使用相比聚对苯二甲酸乙二醇酯(PET)、聚萘二甲酸乙二醇酯(PEN)、聚丙烯(PP)、聚氨酯(PU)等现有的用于电子设备的基材,耐热性差的基材。因此,要求粘合部件的导电性粘合剂在与基材的耐热性相应的低温下粘合。
对此,专利文献1中公开了一种技术,其以提供抑制在室温下增粘,导电性、粘合强度优异的导电性粘合剂为目的,将液态环氧树脂和液态苯氧树脂与银粉和/或涂银金属粉组合,且定量添加潜伏性产生戊二酸的化合物。
此外,专利文献2中,公开了一种导电性粘合剂的技术,其通过组合具备:具有式-R1-O-(式中,R1为C1~C10的烃基)所示的重复单元的主链和水解性甲硅烷基末端基的聚醚聚合体以及银粒子,而具有良好的柔软性和高导电性。
专利文献3中,公开了一种涉及导电性组合物的技术,其通过组合多元醇、封闭型异氰酸酯和纵横比为2以上的导电性填料,固化前的粘性(tack)优异、固化后伸缩时的电阻变化维持较小。
专利文献4中,公开了一种技术,其通过使表面上有金属氧化物和润滑剂存在的导电性金属与异氰酸酯成分在加热固化时发生反应,从导电性金属表面除去该金属氧化物和润滑剂的至少一部分,从而提高导电性组合物的导电率。
现有技术文献
专利文献
专利文献1:日本专利第5200662号公报
专利文献2:日本专利特开2018-48286号公报
专利文献3:日本专利特开2020-150236号公报
专利文献4:日本专利第4467439号公报
发明内容
发明要解决的课题
因此,目前要求能追随基材变形的柔软的导电性粘合剂。然而,如专利文献1这种在通常的电子设备中使用的导电性粘合剂虽然粘合力、导电性优异,但存在缺乏柔软性的问题。另一方面,专利文献2中记载的导电性粘合剂虽然柔软性、电阻率优异,但存在固化温度高的问题。进一步地,专利文献3、专利文献4中记载的以封闭型异氰酸酯为固化剂的导电性粘合剂虽然能低温固化、导电性优异,但其柔软性、粘合性没有被充分研究。
解决课题的手段
本发明人等为了开发用于得到柔软、在低固化温度下具有高导电性和粘合力的固化物的导电性组合物,深入研究后发现,除了作为粘合剂的多元醇、封闭型异氰酸酯,通过组合特定的聚胺和导电性粒子,可得到导电性和粘合性优异、柔软的固化物,从而实现了以下的发明。
即,本发明具有以下构成。
[1]一种导电性组合物,其特征在于,含有多元醇、聚胺、封闭型异氰酸酯和导电性粒子,所述聚胺的活性氢当量为80g/eq以上、200g/eq以下,且胺值为150KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下。
[2]根据[1]所述的导电性组合物,其特征在于,所述多元醇和所述聚胺的混合比(多元醇/聚胺)以活性氢当量比计为7/3~2/8。
[3]根据[1]或[2]所述的导电性组合物,其特征在于,所述导电性粒子为银。
[4]一种固化物,其特征在于,其为[1]~[3]中任一项所述的导电性组合物的固化物。
[5]一种电子设备,其特征在于,所述电子设备具有具备布线的基板和电子部件,且[4]所述的导电性组合物的固化物介于所述电子部件和所述布线之间。
[6]根据[5]所述的电子设备,其特征在于,所述基板为能够伸缩和/或弯曲的基板。
发明的效果
根据本发明,其特征在于,除了多元醇、封闭型异氰酸酯和导电性粒子以外,配混活性氢当量为80g/eq以上、200g/eq以下,且胺值为150KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下的聚胺。通过使用该聚胺,导电性组合物的操作性提高。进一步地,由于导电性粒子和粘合剂界面的密合性提高,因此能在维持得到的固化物的柔软性的同时提高粘合力。进一步地,通过使导电性粒子容易形成网络,可提高得到的固化物的导电性。
附图说明
【图1】图1是显示使用了本发明的导电性组合物的电子设备的截面的示意图。
附图标记
10:基材
20:布线
30:电子部件
31:电极
40:导电性组合物的固化物。
具体实施方式
[导电性组合物]
本实施方式涉及的导电性组合物至少由多元醇、聚胺、封闭型异氰酸酯和导电性粒子构成。
作为本发明中的多元醇,例如,可列举聚醚多元醇、聚酯多元醇、聚碳酸酯多元醇、聚氨酯多元醇、聚丁二烯多元醇、聚异戊二烯多元醇、聚己内酯多元醇、蓖麻油系多元醇等。这些可以单独使用一种,也可以两种以上组合使用。
作为上述聚醚多元醇,可列举芳香族聚醚多元醇、芳香族/脂肪族共聚聚醚多元醇、脂肪族聚醚多元醇、脂环族聚醚多元醇等。
作为上述聚酯多元醇,可列举芳香族聚酯多元醇、芳香族/脂肪族共聚聚酯多元醇、脂肪族聚酯多元醇、脂环族聚酯多元醇等。其中,从柔软性的观点出发,优选脂肪族聚酯多元醇。作为脂肪族聚酯多元醇的市售品的具体例,例如,可列举ODX-2420、ODX-2692(DIC株式会社制)、KURARAY POLYOL P-510、P-1010、P-2050(株式会社可乐丽制)、NIPPOLLAN4009、164、141(东曹株式会社制)等。
作为上述聚碳酸酯多元醇,可列举芳香族聚碳酸酯多元醇、芳香族/脂肪族共聚合聚碳酸酯多元醇、脂肪族聚碳酸酯多元醇、脂环族聚碳酸酯多元醇等。
作为上述聚氨酯多元醇,可列举芳香族聚氨酯多元醇、芳香族/脂肪族共聚合聚氨酯多元醇、脂肪族聚氨酯多元醇、脂环族聚氨酯多元醇等。
其中,从固化性和导电性容易提高这点考虑,优选聚酯多元醇。此外还优选将聚酯多元醇和聚酯多元醇以外的多元醇组合。多元醇中、聚酯多元醇的比例优选为60质量%以上,更优选为80质量%以上,进一步优选为90质量%以上,特别优选为95质量%以上,最优选为98质量%以上,也可以是100质量%。
从固化物的柔软性的观点出发,多元醇的活性氢当量优选为180g/eq以上,更优选为220g/eq以上。此外,从固化物的粘合性、导电性的观点出发,优选为1200g/eq以下,更优选为600g/eq以下。通过设为上述范围,固化物的柔软性、粘合性和导电性的平衡变得更良好。多元醇的活性氢当量的测定方法根据实施例中记载的方法。
多元醇的羟值没有特别限定,但从使导电性、粘合性更良好的观点出发,优选为50~300KOHmg/g,进一步优选为100~250KOHmg/g。
多元醇的重均分子量没有特别限定,但从使导电性、粘合性更良好的观点出发,优选为400~2000g/mol,进一步优选为450~1500g/mol。
除了多元醇成分以外,在不损害性能的范围内,还可以进一步含有具有一个羟基的化合物。作为具有一个羟基的化合物,例如,可列举1-戊醇、辛醇、环己烷乙醇等脂肪族饱和醇;10-十一烯-1-醇等脂肪族不饱和醇;2-苯乙醇、苯甲醇等芳香族醇;进而其衍生物、改性物等。相对于多元醇100质量份,具有一个羟基的化合物的含量优选为10质量份以下,更优选为5质量份以下,进一步优选为3质量份以下,也可以是0质量份。
作为本发明中的聚胺,活性氢当量为80g/eq以上、200g/eq以下,且胺值为150KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下。
聚胺的活性氢当量为80g/eq以上时,固化物的柔软性提高,弹性模量不变得过高,变形时不易产生裂纹。因此,优选为82g/eq以上,更优选为85g/eq以上。此外,为200g/eq以下时,粘合力和导电性提高。因此,优选为195g/eq以下,更优选为190g/eq以下。聚胺的活性氢当量的测定方法根据实施例中记载的方法。
聚胺的胺值优选为160KOHmg/g以上,更优选为170KOHmg/g以上,优选为330KOHmg/g以下,更优选为300KOHmg/g以下。聚胺的胺值在上述范围内时,聚胺和导电性粒子的相互作用引起的导电性组合物的粘度上升被抑制,容易进行处理。聚胺的胺值的测定方法根据实施例中记载的方法。
聚胺在25℃下的粘度优选为55mPa·s以上,更优选为60mPa·s以上,优选为490mPa·s以下,更优选为480mPa·s以下。聚胺在25℃下的粘度在上述范围内时,导电性组合物的粘度变得良好,变得容易进行处理。聚胺在25℃下的粘度的测定方法根据实施例中记载的方法。
即,本发明的聚胺通过使活性氢当量、胺值和25℃下的粘度在上述所定范围内,柔软性、粘合性、导电性和处理性变得良好。
作为本发明中使用的聚胺,例如,可列举链状脂肪族聚胺、环状脂肪族聚胺和芳香环脂肪族聚胺等脂肪族聚胺、脂环族聚胺、芳香族聚胺,进而其衍生物、改性物。这些可以单独使用一种,也可以两种以上组合使用。作为上述衍生物,可列举聚胺的烷基衍生物等,作为上述改性物,可列举聚胺的环氧加成物、曼尼希反应物、迈克尔反应物、硫脲反应物、作为聚合脂肪酸和/或羧酸反应物的聚酰胺-胺等。
上述脂肪族聚胺是至少1个氨基与碳原子数1以上的链状脂肪族烃键合的化合物(其中,除具有芳香族环与氨基直接键合的结构的化合物以外),上述链状脂肪族烃也可以与脂肪族环、芳香族环键合。链状脂肪族烃与氨基和脂肪族环键合的化合物特别称为环状脂肪族聚胺,链状脂肪族烃与氨基和芳香族环键合的化合物特别称为芳香环脂肪族聚胺。作为脂肪族聚胺,具体地,可列举二亚乙基三胺、三亚乙基四胺、四亚乙基五胺、降冰片烷二甲胺、间苯二甲胺和异佛尔酮二胺。
上述脂环族聚胺是全部的氨基与脂肪族环直接键合的化合物,具体地,可列举环己烷二胺等。
上述芳香族聚胺是至少1个氨基与芳香环直接键合的化合物,具体地,可列举二乙基甲苯二胺、二甲硫基甲苯二胺、4,4’-亚甲基双[N-(1-甲基丙基)苯胺]、氨基苄胺等。
其中从柔软性容易提高这点出发,优选脂肪族聚胺或其改性物。作为脂肪族聚胺或其改性物的市售品的具体例,例如,可列举FUJICURE FXJ-8027-H、FXJ-859-C、FXD-821-F、TOHMIDE 280-C、TXE-524(株式会社T&K TOKA制)、JEFFAMINE D-400(巴工业株式会社制)、jerCURE FL11、SA1(三菱化学品株式会社制)等。
此外,也优选脂肪族聚胺或其改性物与脂肪族聚胺或其改性物以外的聚胺组合。聚胺中,脂肪族聚胺或其改性物的比例优选为60质量%以上,更优选为80质量%以上,进一步优选为90质量%以上,特别优选为95质量%以上,最优选为98质量%以上,并且也可以是100质量%。
本发明中的多元醇和聚胺的混合比(多元醇/聚胺)以活性氢当量比计优选为2/8~7/3,更优选为3/7~6/4。通过增加聚胺的比例,可使得到的固化物的粘合性、导电性良好,通过增加多元醇的比例比率,可使得到的固化物的柔软性良好,因此通过将多元醇和聚胺的混合比设为上述范围,固化物的柔软性、粘合性和导电性的平衡变得更良好。
本发明中的多元醇和聚胺的总含量没有特别限定,但相对于导电性组合物总量,优选为1质量%以上、50质量%以下,进一步优选为2质量%以上、30质量%以下,最优选为3质量%以上、15质量%以下。通过将多元醇和聚胺的量设在此范围内,柔软性和导电性的平衡变得更良好。
作为构成本发明中使用的封闭型异氰酸酯化合物的异氰酸酯,优选分子内具有多个异氰酸酯基的化合物(多异氰酸酯)。作为上述多异氰酸酯,可列举六亚甲基二异氰酸酯(以下称HDI)、异佛尔酮二异氰酸酯(IPDI)等脂肪族系多异氰酸酯;二苯甲烷二异氰酸酯(MDI)、甲苯二异氰酸酯(TDI)等芳香族系多异氰酸酯;这些多异氰酸酯的异氰脲酸酯体、加合物、缩二脲体等改性物等,从使柔软性更良好的观点出发,优选脂肪族系多异氰酸酯或脂肪族系多异氰酸酯的改性物。
上述各异氰酸酯也可以是单体,但优选各异氰酸酯的多聚体或该多聚体的异氰脲酸酯体、加合物、缩二脲体等改性物。
最优选的异氰酸酯是HDI的多聚体等脂肪族系多异氰酸酯的多聚体、或其改性物。
作为构成上述封闭型异氰酸酯化合物的封端剂,可列举酚系、肟系、醇系、内酰胺系、活性亚甲基系和吡唑系的封端剂等。其中,在能降低反应温度这点上,优选活性亚甲基系封端剂、吡唑系封端剂。封端剂可以含有单独一种,也可以含有两种以上。从固化性和保存稳定性的观点出发,优选含有活性亚甲基系和吡唑系封端剂两者。
作为上述活性亚甲基系封端剂,例如,可列举丙二酸二甲酯、丙二酸二乙酯、丙二酸二丁酯、丙二酸-2-乙基己酯、丙二酸甲基丁酯、丙二酸二乙基己酯、丙二酸二苯酯等的丙二酸二烷基酯等。
作为上述吡唑系封端剂,例如,可列举吡唑、3,5-二甲基吡唑、3-甲基吡唑、4-硝基-3,5-二甲基吡唑等。
作为上述封闭型异氰酸酯化合物的市售品,可列举DURANATE SBN-70D、SBB-70P、TPA-B80E(旭化成株式会社制)、Desmodur BL3272MPA、BL3475BA/SN、BL3575MPA/SN(Covestro制)、Trixene BI7960、BI7982、BI7991、BI7992(Baxenden制)等。
具有本发明中的多元醇和聚胺的全部的活性氢基与封闭型异氰酸酯的异氰酸酯基的配混比(NCO基/活性氢基)没有特别限定,优选为0.7以上、小于2.0,进一步优选为0.8以上、1.5以下。在此范围内时,能在维持固化物的柔软性的同时表现出更良好的粘合性。
本发明中的导电性组合物,在不损害性能的范围内,可以进一步含有催化剂。催化剂没有特别限定,但例如,可列举有机锡化合物、有机铋金属化合物、叔胺化合物等。相对于导电性组合物总量,催化剂的含量优选为1.0质量%以下,更优选为0.1质量%以下。
本发明中使用的导电性粒子没有特别限定,但可列举银、铜、金、铂、钯、铝、镍、铟、铋、锌、铅、锡、炭黑等。这些可以一种单独使用,也可以两种以上组合使用。其中从导电性的观点出发,优选使用银粒子。
导电性粒子的平均粒径D50没有特别限定,平均粒径D50优选为0.4μm以上、15μm以下。D50为0.4μm以上时,固化物的柔软性提高,固化物的弹性模量不变得过高,变形时不易产生裂纹。因此,更优选为0.5μm以上,进一步优选为0.6μm以上。此外,D50为15μm以下时,粘合力和导电性提高。因此,更优选为12μm以下,进一步优选为10μm以下。
本发明的导电性组合物中也可以单独含有一种具有单一平均粒径D50的导电性粒子,也可以含有平均粒径D50不同的两种以上的导电性粒子。从维持柔软性的同时提高粘合力的观点出发,是优选含有小粒径和大粒径的两种以上。小粒径的导电性粒子的平均粒径D50没有特别限定,但优选为0.4μm以上,更优选为0.5μm以上,进一步优选为0.6μm以上。此外,优选为2μm以下,更优选为1.5μm以下,进一步优选为1.2μm以下。另一方面,大粒径的导电性粒子的平均粒径D50没有特别限定,优选为5μm以上,更优选为6μm以上,进一步优选为7μm以上。此外,优选为15μm以下,更优选为12μm以下,进一步优选为10μm以下。小粒径和大粒径的导电性粒子的配混比(小粒径/大粒径的质量比)没有特别限定,但优选为95/5~50/50,进一步优选为90/10~70/30。通过使小粒径和大粒径的导电性粒子的配混比在此范围内,能得到在维持导电性和粘合性的同时,进一步柔软的固化物。
此外,本发明中的平均粒径D50表示通过激光衍射法测定的粒径的累积体积基准为50%时的粒径。
导电性粒子的形状没有特别限定,但可列举鳞片状(也称薄片状)、不定形凝集状、球状、块状等。导电性粒子的形状可以含有单独一种,也可以含有两种以上。其中从防止加热时的流动的观点出发,优选为至少含有鳞片状。
本发明中的导电性粒子的含量没有特别限定,但相对于导电性组合物总量,优选为50质量%以上、95质量%以下,进一步优选为60质量%以上、90质量%以下。通过使导电性粒子的量在此范围内,柔软性和导电性的平衡变得更良好。
本发明中的导电性组合物可以不含有溶剂,也可以含有溶剂。导电性组合物中的溶剂的含量优选为小于10质量%,更优选为小于5质量%,也可以是0质量%,还可以是1质量%以上。通过使溶剂的含量在上述范围内,可抑制形成固化物时气泡的产生,且得到的固化物变得能厚膜化。
溶剂的种类没有特别限定,但可列举乙酸乙酯、乙酸丁酯、溶剂石脑油、丙二醇单甲醚、二丙二醇单甲醚、丙二醇单甲醚乙酸酯、丙二醇单乙醚乙酸酯等。
本发明中的导电性组合物中,可进一步配混热塑性树脂、无机填料、导电助剂、颜料、染料、分散剂、消泡剂、流平剂、触变性赋予剂、反应性稀释剂、阻燃剂、抗氧化剂、紫外线吸收剂、抗水解剂、粘合性赋予剂、增塑剂等赋予剂。相对于导电性组合物总量,赋予剂的配混量优选为10质量%以下,更优选为3质量%以下,进一步优选为1质量%以下。
本发明中的导电性组合物可通过将作为粘合剂成分、多元醇和聚胺和封闭型异氰酸酯化合物、导电性粒子以及可任意使用的成分通过溶解器(dissolver)、三辊研磨机、自转公转型混合机、磨碎机(attritor)、球磨机(ball mill)、砂磨机(sand mill)等分散机混合分散而得到。
由于本发明中的导电性组合物可兼顾柔软性、粘合性和导电性,因而适宜作为导电性粘合剂(优选为柔性混合电子产品使用的导电性粘合剂)使用。通过向基材涂布或印刷本发明中的导电性组合物并使其固化,可作为焊料的替代,用于电子部件的安装。向基材上涂布的工序没有特别限定,例如,可列举丝网印刷法、冲压(stamping)法、点胶(dispensing)法、刮板(squeegee)印刷等。此外,通过使导电性组合物固化,可用于半导体元件芯片部件的粘合或安装、电路连接、石英振子,或压电元件的粘合、封装的密封等。
固化时的加热温度根据活性氢基和封闭型异氰酸酯基的反应温度、所用基材的耐热性适宜决定。加热温度,例如,可以是80~150℃,也可以是100℃~130℃。加热时间没有特别限定,但优选30分钟~60分钟程度。
从柔软性的观点出发,使用本发明中的导电性组合物形成的固化物在使用粘弹性测定装置测定的25℃下的储能弹性模量优选为50MPa以上、600MPa以下,进一步优选为150MPa以上、500MPa以下。上述固化物的储能弹性模量的测定方法根据实施例中记载的方法。
从导电性的观点出发,上述固化物的电阻率优选为小于2.0×10-4Ω·cm,进一步优选为小于1.5×10-4Ω·cm。上述固化物的电阻率的测定方法根据实施例中记载的方法。
从粘合性的观点出发,上述固化物在使用无氧铜板作为被粘物时的剪切粘合力优选为2.0MPa以上,进一步优选为2.4MPa以上。上述固化物的剪切粘合力的测定方法根据实施例中记载的方法。
本实施方式涉及的电子设备具有具备布线的基板和电子部件,上述导电性组合物的固化物介于电子部件和布线之间。由此,在基板上形成的布线和电子部件可物理连接和电气连接。图1是显示上述电子设备的一例的示意截面图,该电子设备具备基板10、在基板10的表面上形成的布线20、电子部件30,导电性组合物的固化物40介于上述布线20和电子部件30(更准确地,电子部件30上形成的电极31)之间。通过此固化物40,电子部件30和布线20电气连接。
本实施方式涉及的电子设备中的基板也可以是能够伸缩和/或弯曲的基板。由于上述导电性组合物的固化物具有柔软性,因而能追随基板的伸缩、弯折,抑制在电子部件和布线的连接部产生的剥离、裂纹。因此,本实施方式涉及的电子设备即使是柔性的,也具有高连接可靠性。
本发明中使用的能够伸缩和/或弯曲的基板没有特别限定,但可列举纤维结构体、树脂膜、橡胶等。作为纤维结构体,例如,可列举编物、织物、无纺布、纸等。作为树脂膜,例如,可列举聚对苯二甲酸乙二醇酯、聚氯乙烯、聚乙烯、聚丙烯、聚碳酸酯、聚萘二甲酸乙二醇酯、聚氨酯、聚酰亚胺、聚甲基丙烯酸甲酯、硅酮等。作为橡胶,可列举聚氨酯橡胶、丙烯酸橡胶、硅酮橡胶、丁二烯橡胶,丁腈橡胶、氢化丁腈橡胶等含有腈基的橡胶、异戊二烯橡胶、硫化橡胶、苯乙烯丁二烯橡胶、丁基橡胶、乙丙橡胶等。
实施例
以下展示实施例,对本发明作更详细且具体的说明。此外,实施例中的操作、评价结果等通过以下方法测定。
<胺值>
聚胺的胺值通过将1g样品溶解于50g苯酚/甲醇(质量比50/50)混合溶液中,用1/10N盐酸甲醇溶液、溴酚蓝指示剂滴定,用每1g树脂对应的KOH的mg数表示。
<聚胺的活性氢当量>
聚胺的活性氢当量根据骨架结构,通过下述式(i)计算。
聚胺的活性氢当量(g/eq)
=聚胺的分子量/具有活性氢的氮原子数(i)
<多元醇的羟值>
多元醇的羟值如以下这般测定。首先,用吡啶定容12.5g醋酸酐至50mL,制备乙酰化试剂。在100mL茄形烧瓶中精确称量2.5~5.0g样品(多元醇)(此质量设为e(g)),用全量移液管添加5mL乙酰化试剂和10mL甲苯后,安装冷凝管,在100℃下搅拌加热1小时。然后,用全量移液管添加2.5mL蒸馏水,进一步加热搅拌10分钟。冷却2~3分钟后,添加12.5mL乙醇,滴加2~3滴作为指示剂的酚酞后,用0.5mol/L乙醇制氢氧化钾滴定(此滴定量设为a(mL))。另一方面,作为空白试验,向100mL茄形烧瓶中加入5mL乙酰化试剂、10mL甲苯和2.5mL蒸馏水,加热搅拌10分钟后,进行同样的滴定(此滴定量设为b(mL))。基于这些结果,通过下述式(ii)计算羟值。此外,式(ii)中,f为滴定液(0.5mol/L乙醇制氢氧化钾)的因子。
多元醇的羟值(mg-KOH/g)
={(b-a)×28.05×f}/e(ii)
<多元醇的活性氢当量>
多元醇的活性氢当量基于得到的多元醇的羟值,通过下述式(iii)求出。
多元醇的活性氢当量(g/eq)
=56.11/(羟值×10-3)(iii)
<粘度>
聚胺的粘度使用E型粘度计(东机产业社制,TVE-25H),测定温度25℃下的粘度。
<涂布性>
对于导电性组合物,有流动性、可用涂布机(applicator)涂布为○,没有流动性、不能用涂布机涂布的为×。
<弹性模量>
在TEFLON(注册商标)膜上使用间隙200μm的涂布机涂布导电性组合物。用热风干燥机在130℃使其加热固化60分钟后,冷却至室温。然后,将涂膜切割成4mm×300mm,从TEFLON膜剥离得到弹性模量的评价用试验片。将试验片设置于在粘弹性测定装置(IT计测制御公司制,DVA-200),在应变:0.1%、频率:10Hz、升温速度:4℃/min、测定温度范围:-10℃至100℃的条件下启动装置,求出25℃下的储能弹性模量。
<电阻率>
在PET膜上使用间隙50μm的涂布机涂布导电性组合物。用热风干燥机在130℃使其加热固化60分钟后,冷却至室温。然后,将涂膜切割成10mm×35mm,得到电阻率的评价用试验片。用测厚仪(thickness gauge)(TECLOCK公司制,SMD-565L)测定试验片的膜厚,用Loresta-GP(三菱化学分析科技公司制,MCP-T610)测定试验片的膜电阻。分别测定4张试验片,用其平均值计算出电阻率,求出导电率。
<粘合性>
为评价导电性组合物的粘合性,使用2张无氧铜板(尺寸:25mm×100mm×1mm,材质:C1020P,硬度:1/2H)作为被粘物。用丙酮清洗被粘物的表面后,在一块铜板上以25mm×12.5mm的面积涂布导电性组合物,贴合另一块铜板。用热风干燥机在130℃使其加热固化60分钟后,冷却至室温。粘合力用精密万能试验机(岛津制作所制,AG-20kNXDplus),在剪切方向上的拉伸速度10mm/min,23℃、RH50%的环境下测定。
实施例1~4、比较例1~4
<导电性组合物的制造例>
根据表1的配混比添加各种成分,预混合后,通过用三辊研磨机分散而制为浆料,得到导电性组合物。得到的导电性组合物的评价结果如表1所示。
【表1】
此外,表1中的各成分如以下所述。
多元醇:株式会社可乐丽,聚酯多元醇,P-510(活性氢当量:250g/eq,羟值:224KOHmg/g,重均分子量:500g/mol)
聚胺1:株式会社T&K TOKA,改性脂肪族胺,FXD-821-F(活性氢当量:85g/eq,胺值:300KOHmg/g,粘度:65mPa·s)
聚胺2:株式会社T&K TOKA,改性脂肪族胺,FXJ-859-C(活性氢当量:190g/eq,胺值:170KOHmg/g,粘度:450mPa·s)
聚胺3:东京化成工业株式会社,芳香环脂肪族胺,间苯二甲胺(活性氢当量:68g/eq,胺值:824KOHmg/g,粘度:6mPa·s)
聚胺4:亨斯迈公司,聚氧丙烯二胺,D400(活性氢当量:224g/eq,胺值:415KOHmg/g,粘度:27mPa·s)
聚胺5:株式会社T&K TOKA,聚氨基酰胺,280-C(活性氢当量:80g/eq,胺值:415KOHmg/g,粘度:475mPa·s)
聚胺6:株式会社T&K TOKA,改性脂肪族胺,8113(活性氢当量:190g/eq,胺值:280KOHmg/g,粘度:850mPa·s)
异氰酸酯:Baxenden公司,封闭型异氰酸酯,BI7992(NCO:当量456g/eq)
导电性粒子1:美泰乐科技日本株式会社,薄片银,P791-24(D50:0.7μm)
导电性粒子2:美泰乐科技日本株式会社,块状银,P853-11(D50:8.0μm)
导电性粒子3:美泰乐科技日本株式会社,块状银,P318-41(D50:9.0μm)
实施例1~4除了多元醇和封闭型异氰酸酯、导电性粒子以外,还含有活性氢当量为80g/eq以上、200g/eq以下,且胺值为150KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下的聚胺,因而可得到柔软且具有高导电性和粘合性的固化物。实施例1和2中,只要是该聚胺,无论什么种类都能表现出物性。实施例3和4中,通过增加聚胺相对于多元醇的混合量,粘合性提高,通过减少聚胺的混合量,则成为更柔软的固化物。
比较例1中,通过使用活性氢当量小于80g/eq、且胺值大于350KOHmg/g、且粘度小于50mPa·s的聚胺不能得到柔软的固化物。比较例2中,由于活性氢当量大于200g/eq,因而粘合力和导电性恶化。比较例3中,由于胺值大于350KOHmg/g,比较例4中,由于粘度大于500mPa·s,因而导电性组合物的粘度变高,无法操作。因此,无法涂布,无法测定弹性模量、粘合力和电阻率(导电率)。
产业上的可利用性
如以上所示,本发明的导电性组合物可在低温下形成导电性和粘合性优异的、柔软的固化物,特别是作为在柔性基材上形成的布线和电子部件的粘合材料非常适合。
Claims (6)
1.一种导电性组合物,其特征在于,含有多元醇、聚胺、封闭型异氰酸酯和导电性粒子,所述聚胺的活性氢当量为80g/eq以上、200g/eq以下,且胺值为150
KOHmg/g以上、350KOHmg/g以下,且25℃下的粘度为50mPa·s以上、500mPa·s以下。
2.根据权利要求1所述的导电性组合物,其特征在于,所述多元醇和所述聚胺的混合比,即多元醇/聚胺,以活性氢当量比计为7/3~2/8。
3.根据权利要求1或2所述的导电性组合物,其特征在于,所述导电性粒子为银。
4.一种固化物,其特征在于,其为权利要求1或2所述的导电性组合物的固化物。
5.一种电子设备,其特征在于,所述电子设备具有具备布线的基板和电子部件,且权利要求4所述的导电性组合物的固化物介于所述电子部件和所述布线之间。
6.根据权利要求5所述的电子设备,其特征在于,所述基板为能够伸缩和/或弯曲的基板。
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