JP7279720B2 - 着雪氷防止剤、着雪氷防止構造体、着雪氷防止構造体の製造方法 - Google Patents
着雪氷防止剤、着雪氷防止構造体、着雪氷防止構造体の製造方法 Download PDFInfo
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- JP7279720B2 JP7279720B2 JP2020535400A JP2020535400A JP7279720B2 JP 7279720 B2 JP7279720 B2 JP 7279720B2 JP 2020535400 A JP2020535400 A JP 2020535400A JP 2020535400 A JP2020535400 A JP 2020535400A JP 7279720 B2 JP7279720 B2 JP 7279720B2
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- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- VPYJNCGUESNPMV-UHFFFAOYSA-N triallylamine Chemical compound C=CCN(CC=C)CC=C VPYJNCGUESNPMV-UHFFFAOYSA-N 0.000 description 1
- ADGSJBYMQJVZIJ-UHFFFAOYSA-N trihydroxy(3,3,3-trifluoropropyl)silane Chemical compound O[Si](O)(O)CCC(F)(F)F ADGSJBYMQJVZIJ-UHFFFAOYSA-N 0.000 description 1
- YLZZRAHVHXTKGO-UHFFFAOYSA-N trihydroxy(octyl)silane Chemical compound CCCCCCCC[Si](O)(O)O YLZZRAHVHXTKGO-UHFFFAOYSA-N 0.000 description 1
- FCVNATXRSJMIDT-UHFFFAOYSA-N trihydroxy(phenyl)silane Chemical compound O[Si](O)(O)C1=CC=CC=C1 FCVNATXRSJMIDT-UHFFFAOYSA-N 0.000 description 1
- VYAMDNCPNLFEFT-UHFFFAOYSA-N trihydroxy(propyl)silane Chemical compound CCC[Si](O)(O)O VYAMDNCPNLFEFT-UHFFFAOYSA-N 0.000 description 1
- QTSIIQWGUWMBTD-UHFFFAOYSA-N trihydroxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound O[Si](O)(O)CCCOCC1CO1 QTSIIQWGUWMBTD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 239000011240 wet gel Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- 229910000166 zirconium phosphate Inorganic materials 0.000 description 1
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Description
本明細書において、「~」を用いて示された数値範囲は、「~」の前後に記載される数値をそれぞれ最小値及び最大値として含む範囲を示す。本明細書に段階的に記載されている数値範囲において、ある段階の数値範囲の上限値又は下限値は、他の段階の数値範囲の上限値又は下限値に置き換えてもよい。本明細書に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値に置き換えてもよい。「A又はB」とは、A及びBのどちらか一方を含んでいればよく、両方とも含んでいてもよい。本明細書に例示する材料は、特に断らない限り、1種を単独で又は2種以上を組み合わせて用いることができる。本明細書において、組成物中の各成分の含有量は、組成物中に各成分に該当する物質が複数存在する場合、特に断らない限り、組成物中に存在する複数の物質の合計量を意味する。
本実施形態の着雪氷防止剤としては、例えば、下記第一~第四の態様が挙げられる。各々の態様を採用することで、各々の態様に応じた着雪氷防止性及び密着性を得ることができる。
一実施形態の着雪氷防止剤は、(分子内に)加水分解性の官能基又は縮合性の官能基を有するポリシロキサン化合物、及び、該加水分解性の官能基を有するポリシロキサン化合物の加水分解生成物からなる群より選択される少なくとも一種(以下、場合により「ポリシロキサン化合物群」という)を含有する液状組成物を含む(着雪氷防止剤が当該液状組成物であってもよい)。着雪氷防止剤は、また、加水分解性の官能基又は縮合性の官能基を有するポリシロキサン化合物、及び、該加水分解性の官能基を有するポリシロキサン化合物の加水分解生成物からなる群より選択される少なくとも一種を含有する液状組成物の縮合物を含んでいてもよい。このような着雪氷防止剤によれば、対象物の被処理面に優れた着雪氷防止性を付与することができる。上記着雪氷防止剤は、対象物の被処理面に着雪氷防止部を形成するために用いられてもよい。上記着雪氷防止剤から形成される着雪氷防止部は、優れた着雪氷防止性を有すると共に、被処理面との密着性にも優れる。上記着雪氷防止部は、例えば、膜状の着雪氷防止部(以下、「着雪氷防止膜」ともいう)及び粒子状の着雪氷防止部(以下、「着雪氷防止粒子」ともいう)の少なくとも一方を含む形態であってもよい。すなわち、本実施形態に係る着雪氷防止剤は、対象物の被処理面に着雪氷防止膜及び/又は着雪氷防止粒子を形成するものであってもよい。
本実施形態の着雪氷防止剤は、シロキサン結合(Si-O-Si)を含む主鎖を有するポリシロキサンを含有する着雪氷防止成分を含むことかできる。当該着雪氷防止成分は、構造単位として、下記M単位、D単位、T単位又はQ単位を有することができる。
T:1個のケイ素原子に結合した酸素原子が3個と水素原子又は1価の有機基が1個の含ケイ素結合単位。
D:1個のケイ素原子に結合した酸素原子が2個と水素原子又は1価の有機基が2個の含ケイ素結合単位。
本実施形態の着雪氷防止剤は、下記式(1)で表される構造を有する化合物を含む着雪氷防止成分を含有していてもよい。本実施形態に係る着雪氷防止成分は、式(1)で表される構造を含む構造として、下記式(1a)で表される構造を有する化合物を含むことができる。例えば、上記式(A)で表される構造を有するポリシロキサン化合物を含む液状組成物の縮合物には、式(1)及び式(1a)で表される構造を骨格中に有する化合物を含む着雪氷防止成分が含まれ得る。
本実施形態の着雪氷防止剤は、支柱部及び橋かけ部を備えるラダー型構造を有し、前記橋かけ部が下記式(2)で表される化合物、を含む着雪氷防止成分、を含有していてもよい。着雪氷防止成分が、骨格中にこのようなラダー型構造を有する化合物を含むことにより、着雪氷防止性を更に向上させると共に、機械的強度を向上させることができる。すなわち、本実施形態の着雪氷防止剤は、ラダー型構造に起因する優れた着雪氷防止性及び耐久性を有している。例えば、上記式(B)で表される構造を有するポリシロキサン化合物を含む液状組成物の縮合物には、式(2)で表される橋かけ部を有するラダー型構造を骨格中有する化合物を含む着雪氷防止成分が含まれ得る。なお、本実施形態において「ラダー型構造」とは、2本の支柱部(struts)と支柱部同士を連結する橋かけ部(bridges)とを有するもの(いわゆる「梯子」の形態を有するもの)である。本態様において、ラダー型構造は、化合物の一部に含まれる態様であってもよい。
次に、上記着雪氷防止剤を用いて得られる着雪氷防止構造体について説明する。本実施形態の着雪氷防止構造体は、被処理面に着雪氷防止部が形成されており、着雪氷防止部が、上記着雪氷防止剤の乾燥物を含む。なお、着雪氷防止剤が上記の液状組成物の縮合物を含む場合であれば、着雪氷防止部が形成される際に縮合反応がさらに進むと考えられ、また着雪氷防止剤が上記の液状組成物そのものである場合であれば、着雪氷防止部が形成される際に縮合反応が生じると考えられる。そのため、着雪氷防止部は着雪氷防止剤の反応物を含むと言うこともできる。
次に、着雪氷防止剤の製造方法について説明する。着雪氷防止剤の製造方法は、特に限定されないが、例えば、以下の方法により製造することができる。
配合工程は、上記のポリシロキサン化合物、及び必要に応じシリカ粒子、シランモノマー、溶媒等を混合する工程である。この工程により、ポリシロキサン化合物等のケイ素化合物の加水分解反応を行うことができる。なお、シリカ粒子は、溶媒に分散された分散液の状態で混合してもよい。本工程においては、加水分解反応を促進させるため、溶媒中に更に酸触媒を添加してもよい。また、溶媒中に界面活性剤を添加することもできる。縮合性の官能基を有するケイ素化合物を用いる場合、加水分解反応は必ずしも必須ではない。
必要に応じ、縮合反応工程により、縮合性の官能基を有するポリシロキサン化合物及びシランモノマー、配合工程で得られた加水分解反応物等の縮合反応を行うことができる。本工程では、縮合反応を促進させるため、塩基触媒を用いることができる。また、本工程において、熱加水分解により塩基触媒を発生する熱加水分解性化合物を添加することもできる。
次に、着雪氷防止構造体の製造方法について説明する。着雪氷防止構造体の製造方法は、特に限定されないが、例えば、以下の方法により製造することができる。
塗布工程は、例えば、上記着雪氷防止剤を被処理面に塗布する工程である。また、場合により、塗布後に被処理面を乾燥して溶媒を揮発させてもよい。例えば、本工程によって、被処理面に着雪氷防止部(着雪氷防止膜及び/又は着雪氷防止粒子)を形成することができる。着雪氷防止剤は、被処理面全体に塗布してもよく、被処理面の一部に選択的に塗布してもよい。
洗浄工程は、例えば、塗布工程で得られた構造体を洗浄する工程である。本工程を施すことにより、着雪氷防止部中の未反応物、副生成物等の不純物を低減し、より純度の高い着雪氷防止部を得ることができる。
予備乾燥工程は、例えば、洗浄工程により洗浄された構造体を予備乾燥させる工程である。
エージング工程は、例えば、予備乾燥工程により乾燥された着雪氷防止部をエージング(加熱エージング等)する工程である。これにより、最終的な着雪氷防止構造体を得ることができる。エージング工程を施すことにより、着雪氷防止構造体の着雪氷防止性と密着性とが更に向上する。なお、洗浄工程及び予備乾燥工程を省略する場合には、例えば、塗布工程で形成された着雪氷防止部をエージングすればよい。
攪拌機、温度計及びジムロート冷却管を備えた1リットルの3つ口フラスコにて、ヒドロキシ末端ジメチルポリシロキサン「XC96-723」(モメンティブ社製、製品名)を100.0質量部、メチルトリメトキシシランを181.3質量部及びt-ブチルアミンを0.50質量部混合し、30℃で5時間反応させた。その後、この反応液を、1.3kPaの減圧下、140℃で2時間加熱し、揮発分を除去することで、両末端2官能アルコキシ変性ポリシロキサン化合物(ポリシロキサン化合物A)を得た。
100mM 酢酸イソプロピルアルコール溶液15mLに、メチルトリメトキシシランKBM-13(信越化学工業株式会社製、製品名)を0.45mL、ジメチルジメトキシシランKBM-22(信越化学工業株式会社製、製品名)を0.15mL、ポリシロキサン化合物Aを0.15mL添加し、60分間撹拌した。これに純水を420mL滴下し、60分間撹拌し、着雪氷防止剤を得た。
上記にて得られた着雪氷防止剤に、スライドグラスS7213(松波硝子工業株式会社製、製品名)をディップした後、室温で30分間乾燥することで、着雪氷防止構造体を得た。
図6は、着氷力試験の試験方法を模式的に表す図である。着氷力試験は以下のようにして行った。
(1)荷重測定装置をセットした恒温槽を-9℃に設定した。
(2)恒温槽内に、試料及びステンレスリングをセットし、2時間静置した。
(3)ステンレスリング内に水を注入し、30分間静置した。これにより、図6に示すように、試料23上に置かれたステンレスリング21内に氷22を形成した。
(4)ステンレスリングの外側から荷重Sをかけ、最大荷重点を測定した。
(5)最大荷重を単位面積当たりで換算し、着氷力(N/cm2)を得た。なお、ステンレスリング内径は2.5cm、着氷面積は4.9cm2であった。
Claims (10)
- 前記液状組成物が、加水分解性の官能基又は縮合性の官能基を有するシランモノマー、及び、該加水分解性の官能基を有するシランモノマーの加水分解生成物からなる群より選択される少なくとも一種を更に含有する、請求項1に記載の着雪氷防止剤。
- 前記液状組成物がエアロゲル粒子を更に含有する、請求項1又は2に記載の着雪氷防止剤。
- 対象物の被処理面に着雪氷防止部を形成するために用いられる、請求項1~3のいずれか一項に記載の着雪氷防止剤。
- 前記着雪氷防止部がエアロゲルを含む、請求項4に記載の着雪氷防止剤。
- 前記着雪氷防止成分がエアロゲルである、請求項6又は7に記載の着雪氷防止剤。
- 対象物と、該対象物の被処理面上に着雪氷防止部と、を備え、
前記着雪氷防止部が、請求項1~8のいずれか一項に記載の着雪氷防止剤の乾燥物を含む、着雪氷防止構造体。 - 請求項1~8のいずれか一項に記載の着雪氷防止剤を対象物の被処理面に塗布する工程を備える、着雪氷防止構造体の製造方法。
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JP2002323298A (ja) | 2001-04-26 | 2002-11-08 | Sumitomo Light Metal Ind Ltd | 難着霜性の機能性装置 |
JP2011122156A (ja) | 2009-12-13 | 2011-06-23 | General Electric Co <Ge> | 耐候性シリコーン皮膜を有する物品 |
JP2011526958A (ja) | 2008-06-30 | 2011-10-20 | エスティーシー. ユーエヌエム | 耐久性のある、ポリマー−エアロゲルベースの超疎水性コーティング:複合材料 |
JP2014514412A (ja) | 2011-04-25 | 2014-06-19 | ダウ グローバル テクノロジーズ エルエルシー | 湿気硬化型組成物およびその組成物からなる低表面エネルギーのコーティング組成物 |
JP2017517584A (ja) | 2014-03-27 | 2017-06-29 | ピーピージー・インダストリーズ・オハイオ・インコーポレイテッドPPG Industries Ohio,Inc. | 基材上での着氷を軽減する方法 |
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JPS5925868A (ja) * | 1982-08-04 | 1984-02-09 | Kansai Paint Co Ltd | 着氷防止材料用組成物 |
JPH02147688A (ja) * | 1988-11-29 | 1990-06-06 | Kansai Paint Co Ltd | 着氷防止組成物 |
JPH08151553A (ja) * | 1994-11-30 | 1996-06-11 | Toray Dow Corning Silicone Co Ltd | シリコーン系コーティング剤 |
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JP2002323298A (ja) | 2001-04-26 | 2002-11-08 | Sumitomo Light Metal Ind Ltd | 難着霜性の機能性装置 |
JP2011526958A (ja) | 2008-06-30 | 2011-10-20 | エスティーシー. ユーエヌエム | 耐久性のある、ポリマー−エアロゲルベースの超疎水性コーティング:複合材料 |
JP2011122156A (ja) | 2009-12-13 | 2011-06-23 | General Electric Co <Ge> | 耐候性シリコーン皮膜を有する物品 |
JP2014514412A (ja) | 2011-04-25 | 2014-06-19 | ダウ グローバル テクノロジーズ エルエルシー | 湿気硬化型組成物およびその組成物からなる低表面エネルギーのコーティング組成物 |
JP2017517584A (ja) | 2014-03-27 | 2017-06-29 | ピーピージー・インダストリーズ・オハイオ・インコーポレイテッドPPG Industries Ohio,Inc. | 基材上での着氷を軽減する方法 |
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