JP2009545509A - 火炎熱分解法により得られたシリカ被覆酸化亜鉛粒子 - Google Patents
火炎熱分解法により得られたシリカ被覆酸化亜鉛粒子 Download PDFInfo
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- JP2009545509A JP2009545509A JP2009522195A JP2009522195A JP2009545509A JP 2009545509 A JP2009545509 A JP 2009545509A JP 2009522195 A JP2009522195 A JP 2009522195A JP 2009522195 A JP2009522195 A JP 2009522195A JP 2009545509 A JP2009545509 A JP 2009545509A
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- Prior art keywords
- zinc
- silicon oxide
- oxide particles
- particles according
- silicon
- Prior art date
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- 239000002245 particle Substances 0.000 title claims abstract description 105
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 23
- 239000000377 silicon dioxide Substances 0.000 title description 14
- 238000000197 pyrolysis Methods 0.000 title 1
- 239000011701 zinc Substances 0.000 claims abstract description 54
- BRPRTVCQOQBVGM-UHFFFAOYSA-N oxosilicon;zinc Chemical compound [Zn].[Si]=O BRPRTVCQOQBVGM-UHFFFAOYSA-N 0.000 claims abstract description 50
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 25
- 239000006185 dispersion Substances 0.000 claims abstract description 20
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 20
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- BORJONZPSTVSFP-UHFFFAOYSA-N tetradecyl 2-hydroxypropanoate Chemical compound CCCCCCCCCCCCCCOC(=O)C(C)O BORJONZPSTVSFP-UHFFFAOYSA-N 0.000 description 1
- DZKXJUASMGQEMA-UHFFFAOYSA-N tetradecyl tetradecanoate Chemical compound CCCCCCCCCCCCCCOC(=O)CCCCCCCCCCCCC DZKXJUASMGQEMA-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VUYXVWGKCKTUMF-UHFFFAOYSA-N tetratriacontaethylene glycol monomethyl ether Chemical compound COCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCOCCO VUYXVWGKCKTUMF-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000010496 thistle oil Substances 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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Abstract
Description
− 該粒子は、原子%/原子%で表して2〜75のZn/Si比を有し、
− Zn、Si及びOの割合は亜鉛・ケイ素酸化物粒子を基準として、少なくとも99質量%であり、
− 該粒子は、
− 10〜60m2/gのBET表面積、
− 10〜75nmの質量平均一次粒子径、
− 40000nm2未満の平均凝集体面積及び
− 200nm未満の平均凝集体径(ECD)
を有し、
− コアは結晶性であり且つ酸化亜鉛の凝集した一次粒子からなり、そして
− シェルは凝集した酸化亜鉛一次粒子を囲み且つ1種又は複数種の元素SiとOを含有する化合物からなる
亜鉛・ケイ素酸化物粒子を提供する。
− ケイ素化合物は、
R’xSi(OR)4−x(式中、R=Me、Etであり;R’=H、Me、Etであり;x=0−4である)、
R’’uMevSiOSiMevR’’u(式中、R’’=H、Etであり;u=0、1、2であり;v=1、2、3であり;u+v=3である);
R’’’4Si(式中、R’’’=H、Me、Etである)及び/又は
環状ポリシロキサン(R’’’’MeSiO)y(式中、R’’’’=H、Me、Et、y=3−5である)
を含む群からの少なくとも1種の化合物から選択され、
− 酸素含有ガスの酸素の割合は少なくとも亜鉛、有機ケイ素化合物及び水素を完全に酸化するのに十分であり、
− 酸化帯域での反応物の平均残留時間は5ms〜30s、有利には10ms〜100msである
亜鉛・ケイ素酸化物粒子の製造方法を提供する。
− パラアミノ安息香酸(PABA)及びその誘導体、例えば、ジメチル−、エチルジヒドロキシプロピル−、エチルヘキシルジメチル−、エチル−、グリセリル−及び4−ビス−(ポリエトキシ)−PABA、
− シンナマート、例えば、オクチルメトキシシンナマート、エチルメトキシシンナマート、2−エチルヘキシルp−メトキシシンナマート、イソアミルp−メトキシシンナマート、ジイソプロピルシンナマート、2−エトキシエチル4−メトキシシンナマート、DEAメトキシシンナマート(p−メトキシヒドロキシシンナマートのジエタノールアミン塩)、ジイソプロピルメチルシンナマートを含むメチルシンナマート及びメトキシシンナマート、
− ベンゾフェノン、例えば、2,4−ジヒドロキシ−、2−ヒドロキシ−4−メトキシ−、2,2’−ジヒドロキシ−4,4’−ジメトキシ−、2,2’−ジヒドロキシ−4−メトキシ−、2,2’,4,4’−テトラヒドロキシ−、2−ヒドロキシ−4−メトキシ−4’−メチルベンゾフェノン、2,2’−ジヒドロキシ−4,4’−ジメトキシ−5−スルホベンゾフェノンナトリウム、
− ジベンゾイルメタン、例えば、ブチルメトキシジベンゾイル−メタン、特に4−tert−ブチル−4’−メトキシジベンゾイルメタン、
− 2−フェニルベンゾイミダゾール−5−スルホン酸及びフェニル−ジベンゾイミダゾールスルホン酸エステル及びそれらの塩、
− ジフェニルアクリレート、例えば、アルキルアルファ−シアノ−ベータ、ベータ−ジフェニルアクリレート、例えば、オクトクリレン、
− トリアジン、例えば、2,4,6−トリアニリノ−(p−カルボ−2−エチルヘキシル−1−オキシ)−1,3,5−トリアジン、エチルヘキシルトリアゾン及びジエチルヘキシルブタミドトリアゾン、
− カンフル誘導体、例えば、4−メチルベンジリデン−及び3−ベンジリデンカンフル及びテレフタリリデンジカンフルスルホン酸、ベンジリデンカンフルスルホン酸、カンフルベンザルコニウムメトサルフェート及びポリアクリルアミドメチルベンジリデンカンフル;
− サリチラート、例えば、ジプロピレングリコール、エチレングリコール、エチルヘキシル、イソプロピルベンジル、メチル、フェニル、3,3,5−トリメチル及びTEAサリチレート(2−ヒドロキシ安息香酸の化合物及び2,2’,2’’−ニトリロトリスエタノール);
− 2−アミノ安息香酸のエステル。
分析:
BET表面積をDIN66131に従って測定する。
図1A及び1Bは実施例1(図1A)からの本発明による亜鉛・ケイ素酸化物粒子と実施例6(図1B)の商業的に入手可能な粒子のTEM顕微鏡写真を示す。2枚の顕微鏡写真は同じ画像倍率を示す。本発明による亜鉛・ケイ素酸化物粒子の凝集体の寸法が有意に小さいことが分かる。これはまた表2の値からも明らかである。
図3は、実施例1からの本発明による亜鉛・ケイ素酸化物粒子のX線回析スペクトルを示す。パルスは2シータ(度)の位置に対してプロットされる。酸化亜鉛に割り当てられる典型的なパルスに加えて、この実施例では、低強度のパルスを2シータ=21.89、24.73及び26.78で検出する。
図4は、実施例1からの亜鉛・ケイ素酸化物粒子の紫外線スペクトルを示す(条件:0.05質量%、光路長:1mm)。ここで、吸光度を波長(nm)に対してプロットする。最大吸光度は368nmの波長において0.7である。波長450nmでの吸光度は0.155である。透明度は4.5であり、これは368nmでの吸光度を450nmでの吸光度で割って表される。従って、透明度は商業的に入手可能な材料(実施例6)の2.7の場合よりも著しく高い。
図5Aは実施例1からの本発明による亜鉛・ケイ素酸化物粒子のDSC(太い実線)、実施例6からの商業的に入手可能な粒子のDSC(−−−)及び他の商業的に入手可能な二酸化ケイ素で被覆された酸化亜鉛粒子のDSC(Finex50、サカイ;・・−・・)を示す。ここで、μV/mg(y−軸)を温度(℃)に対してプロットする。
6時間を超えると、DCAの分解は全く再現可能に検出されない。分散液のベースとなる実施例1からの酸化粉末は光触媒活性がない。
実施例1からの亜鉛・ケイ素酸化物粒子を、10質量%の固体含有率になるまで、50gの水(0.1質量%のポリアクリル酸がナトリウム塩の形で添加されている)へ撹拌しながら少量ずつ添加する。次いで、この混合液を、超音波フィンガ(直径:7mm、装置:ultrasound processor UP 400s、出力:400W、Dr Hielscher)を用いて各場合において1分間にわたり分散させる。
実施例7からの分散液を、分散条件下で、標準的な商用アクリル/ポリウレタンバインダー調製物(Relius Aqua Siegel Gloss)に添加すると、複合粒子の含有率が2質量%である被覆調製物が得られる。
実施例8のような手順であるが、標準的な商用アクリルバインダー調製物を使用する(Macrynal SM 510 (Cytec), Desmodur N75 (Bayer))。
実施例8及び9からの被覆調製物はそれぞれ、プライマー(Relius Aqua Holz Grund)で前処理されている3つの松材試料を被覆するために使用される(QUV-B 313; DIN EN 927-6, ISO 11507, ASTM D 4857)。用いられた比較は被覆調製物で被覆された松材試料であり、これは複合粒子、アクリル/ポリウレタン−ベース(Relius Aqua Siegel Gloss)がない。
以下の配合物を使用して実施例1のように4質量%の本発明による亜鉛・ケイ素酸化物粒子を含有するサンスクリーン組成物を製造した。
Claims (19)
- コア−シェル構造を有する亜鉛・ケイ素酸化物粒子であって、
− 前記粒子は、原子%/原子%で表して、2から75までのZn/Si比を有し、
− Zn、Si及びOの割合は亜鉛・ケイ素酸化物粒子を基準として、少なくとも99質量%であり、
− 前記粒子は、
− 10〜60m2/gのBET表面積、
− 10〜75nmの質量平均一次粒子径、
− 40000nm2未満の平均凝集体面積及び
− 200nm未満の平均凝集体径(ECD)
を有し、
− コアは結晶性であり且つ酸化亜鉛の凝集した一次粒子からなり、そして
− シェルは凝集した酸化亜鉛一次粒子を囲み且つ元素SiとOを含有する1種又は複数種の化合物からなる
ことを特徴とする、亜鉛・ケイ素酸化物粒子。 - 前記シェルが元素Si、O及びZnを含有する1種又は複数種の化合物からなることを特徴とする、請求項1記載の亜鉛・ケイ素酸化物粒子。
- 前記シェルが非晶質であることを特徴とする、請求項1又は2記載の亜鉛・ケイ素酸化物粒子。
- 前記Zn/Si比が3〜15であることを特徴とする、請求項1又は2記載の亜鉛・ケイ素酸化物粒子。
- 前記BET表面積が20〜40m2/gであることを特徴とする、請求項1から4までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 前記平均凝集体面積が20000nm2未満であり且つ前記平均凝集体径が150nm未満であることを特徴とする、請求項1から5までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 前記シェルの厚さが0.1〜10nmであることを特徴とする、請求項1から6までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 最大吸収度/450nmでの吸収度の比4〜8を有することを特徴とする、請求項1から7までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 光子効率によって表され且つ0.4未満のジクロロ酢酸の分解によって測定される光触媒活性を有することを特徴とする、請求項1から8までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 1400℃への加熱時に、2%未満の質量を失い、相変換がわずかな程度だけ起こることを特徴とする、請求項1から9までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 多くとも0.2質量%の炭素を含むことを特徴とする、請求項1から10までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 多くとも20ppmのPb、多くとも3ppmのAs、多くとも15ppmのCd、多くとも200ppmのFe、多くとも1ppmのSb及び多くとも1ppmのHgを有することを特徴とする、請求項1から11までのいずれか1項記載の亜鉛・ケイ素酸化物粒子。
- 請求項1から12までのいずれか1項記載の亜鉛・ケイ素酸化物粒子の製造方法において、亜鉛蒸気と水素含有燃焼ガスとの混合物を反応器の酸化帯域に通し、その中で500〜1500℃の温度で前記混合物と酸素含有ガス及び少なくとも1種の有機ケイ素化合物とを反応させ、次いで反応混合物を冷却し、粉末状固体をガス状物質から分離し、その際、
− 前記ケイ素化合物は、
R’xSi(OR)4−x(式中、R=Me、Etであり;R’=H、Me、Etであり;x=0−4である)、
R’’uMevSiOSiMevR’’u(式中、R’’=H、Etであり;u=0、1、2であり;v=1、2、3であり;u+v=3である);
R’’’4Si(式中、R’’’=H、Me、Etである)及び/又は
環状ポリシロキサン(R’’’’MeSiO)y(式中、R’’’’=H、Me、Et、y=3−5である)
を含む群からの少なくとも1種の化合物から選択され、
− 酸素含有ガスの酸素の割合は酸化亜鉛、有機ケイ素化合物及び水素を完全に酸化するのに少なくとも十分であり、
− 酸化帯域での反応物の平均残留時間が5ms〜30sである
ことを特徴とする、亜鉛・ケイ素酸化物粒子の製造方法。 - ケイ素化合物がテトラエトキシシラン及び/又はテトラメトキシシランであることを特徴とする、請求項13記載の方法。
- 酸化及び場合により気化に必要とされる温度は、水素含有燃焼ガスに酸素含有ガスで点火することにより形成される火炎によって与えられ、その際、酸化帯域において1<ラムダ≦10であることを特徴とする、請求項13又は14記載の方法。
- 前記蒸発帯域において、0.5≦ラムダ≦1であることを特徴とする、請求項15記載の方法。
- 請求項1から12までのいずれか1項記載の亜鉛・ケイ素酸化物粒子を含む分散液。
- 請求項1から12までのいずれか1項記載の亜鉛・ケイ素酸化物粒子又は請求項17記載の分散液及び少なくとも1種のバインダーを含む被覆組成物。
- 請求項1から12までのいずれか1項記載の亜鉛・ケイ素酸化物粒子又は請求項17記載の分散液を含むサンスクリーン用配合物。
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DE102006038518A DE102006038518A1 (de) | 2006-08-17 | 2006-08-17 | Umhüllte Zinkoxidpartikel |
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UA96950C2 (ru) | 2011-12-26 |
CN101583566A (zh) | 2009-11-18 |
US20100008872A1 (en) | 2010-01-14 |
DE102006038518A1 (de) | 2008-02-21 |
EP2051937A1 (en) | 2009-04-29 |
WO2008019905A1 (en) | 2008-02-21 |
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