JP6071360B2 - 導電性粒子 - Google Patents
導電性粒子 Download PDFInfo
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- JP6071360B2 JP6071360B2 JP2012203312A JP2012203312A JP6071360B2 JP 6071360 B2 JP6071360 B2 JP 6071360B2 JP 2012203312 A JP2012203312 A JP 2012203312A JP 2012203312 A JP2012203312 A JP 2012203312A JP 6071360 B2 JP6071360 B2 JP 6071360B2
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- 239000002245 particle Substances 0.000 title claims description 116
- 229910001887 tin oxide Inorganic materials 0.000 claims description 56
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 55
- 239000007771 core particle Substances 0.000 claims description 51
- 239000011247 coating layer Substances 0.000 claims description 39
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 22
- 239000006185 dispersion Substances 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 19
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000011164 primary particle Substances 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- -1 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000012046 mixed solvent Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920000297 Rayon Polymers 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000002964 rayon Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 239000012452 mother liquor Substances 0.000 description 45
- 239000002253 acid Substances 0.000 description 27
- 239000003513 alkali Substances 0.000 description 26
- CVNKFOIOZXAFBO-UHFFFAOYSA-J tin(4+);tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Sn+4] CVNKFOIOZXAFBO-UHFFFAOYSA-J 0.000 description 15
- 238000006386 neutralization reaction Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 13
- 150000003606 tin compounds Chemical class 0.000 description 13
- 238000010304 firing Methods 0.000 description 12
- 239000000843 powder Substances 0.000 description 10
- 239000012298 atmosphere Substances 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 229910052787 antimony Inorganic materials 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 206010021143 Hypoxia Diseases 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229940079864 sodium stannate Drugs 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C01P2006/62—L* (lightness axis)
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- C01P2006/64—Optical properties, e.g. expressed in CIELAB-values b* (yellow-blue axis)
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Description
前記被覆層が、ドープ元素非含有の酸化スズからなり、
Lab表色系におけるL*が80〜95であり、a*が−2.0〜2.0であり、b*が−2.0〜10.0である導電性粒子を提供するものである。
図1に示す製造装置において、4000cm3の純水に分散させた1050gの硫酸バリウム粒子を、容積10000cm3の母液槽中に投入した。硫酸バリウム粒子は、球状のものであり、その一次粒子径は150nmであった。母液槽中に更に純水を9000cm3になるまで投入した。そこに1080gのスズ酸ナトリウムを投入し、液温を70℃まで上昇させた後、装置内を1時間にわたって循環させて予備分散を行った。予備分散においては、超音波発生装置13(新科産業有限会社製のSRT40−01Type)を作動させた。超音波の出力は570W、周波数は40kHzとした。このようにして母液を得た。この母液を、母液槽から流出する流速S1が3000cm3となるように循環させながら、超音波発生装置13に20%硫酸を供給した。供給速度S3は20cm3/minであった。超音波発生装置13の容積は3000cm3であった。運転条件は、570W、40kHzであった。pHが2〜4になるまで、硫酸を連続的に超音波発生装置13に供給した。
実施例1において超音波発生装置13を作動させない以外は実施例1と同様にして酸化スズ被覆硫酸バリウム粒子を得た。
実施例1で用いた硫酸バリウム粒子に代えて、酸化チタン粒子を用いた。酸化チタン粒子は、球状のものであり、その一次粒子径は160nmであり、872gのスズ酸ナトリウムを使用した。これ以外は実施例1と同様にして、ドープ元素非含有の酸化スズ被覆酸化チタン粒子を得た。
実施例2において、スズ酸ナトリウムの使用量を694gに減らした以外は実施例2と同様にして、ドープ元素非含有の酸化スズ被覆酸化チタン粒子を得た。
実施例2において超音波発生装置13を作動させない以外は実施例2と同様にして酸化スズ被覆硫酸バリウム粒子を得た。
実施例及び比較例で得られた粒子について、上述した方法で塗工液を調製し、その塗工液を用いて導電膜を形成した。その導電膜について表面抵抗の比率R3/R1、及び高温高湿環境に静置後の表面抵抗を測定した。また、実施例及び比較例で得られた粒子について、酸化スズの結晶子径、見掛け密度、見掛け密度の変化率、導電性粒子に占めるスズの割合、L*、a*、b*、導電性粒子の一次粒子径、導電性粒子の圧粉抵抗を測定した。見掛け密度及び見掛け密度の変化率、L*、a*、b*、及び高温高湿環境に静置後の導電膜の表面抵抗は以下の方法で測定した。それ以外は、上述した方法で測定した。それらの結果を以下の表1に示す。
見掛け密度は、体積抵抗率測定に使用する導電性粒子を精秤(5g)し、プレス面積(3.14cm)と圧粉の厚みから計算した。かける圧力によって圧粉の厚みが変化することを利用して見掛け密度の変化率を求めることができる。
日本電色工業(株)製の分光色差計SE600を使用し、CIE1976(L*a*b*)表色系で表した数値を用いて導電性導電性粒子の色を表した。
分散時間を3時間とし、上述した手順で成膜した塗膜を、温度60℃、湿度90%RHの高温高湿環境に30日間静置した後、上述した測定方法と同様の方法で表面抵抗を測定した。
11 母液槽
12 第1循環配管
13 超音波発生装置
14 第2循環配管
20 母液
Claims (7)
- コア粒子の表面に、酸化スズを含有する被覆層が形成されてなる導電性粒子において、該酸化スズの結晶子径が70〜200Åであり、
前記被覆層が、ドープ元素非含有の酸化スズからなり、
Lab表色系におけるL*が80〜95であり、a*が−2.0〜2.0であり、b*が−2.0〜10.0である導電性粒子。 - 前記導電性粒子を含む塗工液を用いて以下の方法で成膜された導電膜について、1時間分散を行って得られた塗工液を用いた場合の表面抵抗R1と、3時間分散を行って得られた塗工液を用いた場合の表面抵抗率R3との比率R3/R1が1〜250である請求項1に記載の導電性粒子。
〔導電膜の成膜方法〕
容積50mLのプラスチック製容器を用意し、その中に導電性粒子7.41gを入れる。次に、この容器内にトルエンとn−ブタノールとの混合溶媒を9.64g入れる。トルエンとn−ブタノールとの容積比は7:3とする。更に、この容器内に三菱レイヨン製のアクリル系コーティング樹脂であるダイヤナール(登録商標)LR−167を6.41g入れる。次いでペイントシェーカー(浅田鉄鋼製)を用い、1時間又は3時間分散を行う。ペイントシェーカーの運転条件は、60Hz環境下の標準運転条件とする。分散によって得られた塗工液を、ポリエチレンテレフタレート製のOHPフィルム(株式会社内田洋行製のトランスペアレンシー OHP用フィルム)に塗工する。塗工にはバーコーター#10(テスター産業株式会社製のROD No.10)を用い、使用液量1mLで塗膜を形成する。塗膜形成後、大気下に80℃で15分間にわたり乾燥を行い、導電膜を得る。 - 一次粒子径が30〜500nmである請求項1に記載の導電性粒子。
- 前記コア粒子が、酸化チタン、硫酸バリウム、アルミナ又はシリカからなる請求項1ないし3のいずれか一項に記載の導電性粒子。
- 前記コア粒子が酸化チタンであり、
圧力0.20N/m2下での見掛け密度A(g/cm3)と、圧力0.02N/m2下での見掛け密度B(g/cm3)との変化率(A−B)/A×100が0〜20%である請求項1ないし4のいずれか一項に記載の導電性粒子。 - 前記コア粒子が硫酸バリウムであり、
圧力0.20N/m2下での見掛け密度A(g/cm3)と、圧力0.02N/m2下での見掛け密度B(g/cm3)との変化率(A−B)/A×100が0〜26%である請求項1ないし4のいずれか一項に記載の導電性粒子。 - 請求項1ないし6のいずれか一項に記載の導電性粒子を含む導電性組成物。
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