JP2020169240A - 防霜用積層体、該積層体を備える熱交換器、及び防霜用コーティング剤 - Google Patents
防霜用積層体、該積層体を備える熱交換器、及び防霜用コーティング剤 Download PDFInfo
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- 238000000879 optical micrograph Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
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- 230000000379 polymerizing effect Effects 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 229910000077 silane Inorganic materials 0.000 description 1
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- 239000002335 surface treatment layer Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 229940095676 wafer product Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/006—Preventing deposits of ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
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Abstract
Description
試験サンプルを、2.0W/mKの熱伝導率を有する厚さ1mmの熱伝導性接着シート(3M(商標)ハイパーソフト放熱シート、スリーエムジャパン社製)を介してペルチェ素子(図1の試験サンプル背後の黒色四角形状の素子)に適用し、オーブン中に配置した。かかるオーブンは、雰囲気温度が10℃に保持され、かつ、1.0m/秒の速さで湿度53%の風がオーブン内を流れるように構成されている。
上記の霜形成試験を60分間実施した後、ペルチェ素子の駆動のみを停止し、試験サンプル表面の霜の解凍状態を20秒間隔で目視により観測した。目視において、試験サンプル表面が元来の試験サンプル表面の色に戻ったことを確認したときに、霜の解凍が生じたと判定した。その結果を図2及び表3に示す。ここで、表3における時間は、霜の解凍が明らかに生じた時点の時間であり、かかる時間が短い方が霜の解凍性に優れるといえる。例えば、図2の場合、例4では60秒で霜の解凍が明らかに生じているのに対し、比較例4では60秒でも明らかな霜の解凍が認められないため、例4の方が霜の解凍性に優れている。60秒でも明らかな霜の解凍が認められない場合は、表2において「>60」と表記している。
防霜用積層体のコーティング層表面の算術平均表面粗さRaは、JIS B 0601に準拠し、下記条件で、原子間力顕微鏡(サイファー(商標)AFM、株式会社アサイラムテクノロジー製)によって算出した。
スキャン速度(探針移動速度):
18マイクロメートル/秒(3マイクロメートル×3マイクロメートル撮像時)
6マイクロメートル/秒(1マイクロメートル×1マイクロメートル撮像時)
分解能:256ピクセル×256ピクセル
測定モード:タッピングモード
探針:AC240TS(オリンパス社製。ばね定数:2nN/nm)
カンチレバーの振幅値:1V
セットポイント値(触圧):0.8V
ゲイン値:30.0
接触角メーター(協和界面科学株式会社から製品名「DROPMASTER FACE」として入手)を使用し、Sessile Drop法により、コーティング層表面の水接触角を測定した。2マイクロリットルの水を試験サンプルの表面に滴下した後、光学顕微鏡画像から水接触角を測定した。5回測定した平均から水接触角の値を計算した。その結果を表3に示す。
基材及びコーティング層間の接着性能は、JIS K 5600に従ってクロスカット法によって評価した。ここではグリッド間隔が1mmの5×5グリッドと、セロテープ(商標)CT−24(ニチバン株式会社製)とを採用した。コーティング層に剥がれが生じていなかった場合は「良」、コーティング層に剥がれが生じていた場合は「不良」とし、その結果を表3に示す。
10.0gのIPA STを、ガラス瓶中の488gのIPA及び2.0gのA−1170の混合物に加え、10分間室温で撹拌し、プライマー用コーティング剤を調製した。ディップコーターのヘッド部分にアルミニウム基材を吊るして固定し、次いで、プライマー用コーティング剤中にアルミニウム基材を浸漬した。アルミニウム基材を30秒間浸漬させた後、3.00mm/秒の上昇速度でアルミニウム基材を引き上げた。得られたアルミニウム基材を150℃のオーブン中に5分間静置し、プライマー層を備えるアルミニウム基材を調製した。
SACを、米国特許公開2015/0203708号公報(Klunら)記載のPreparative Example 7に記載の方法で調製した。具体的には、オーバーヘッドスターラーを備える500mLの丸底フラスコに、140.52g(0.684mol、重量平均分子量205.28)の3−トリメトキシシリルプロピルイソシアネート及び0.22gのDBTDL(ジブチルすずジラウレート)を添加し、55℃に加熱した。添加漏斗を用いて、79.48g(0.684mol、重量平均分子量116.12)のヒドロキシエチルアクリレートを約1時間かけて添加した。合計約4時間で、生成物を単離し、瓶に詰めた。ここで、重量平均分子量は、標準ポリスチレンを用いたゲルパーミエーションクロマトグラフィー(GPC)により求めた。
25.25gのSILQUEST(商標)A−174、及び0.5gのPROSTAB(商標)を、ガラス瓶中の400gのNALCO(商標)2327及び450gのMIPAの混合物に加え、10分間室温で撹拌した。ガラス瓶を密封し、80℃のオーブン内に16時間静置した。得られた溶液から、60℃で溶液の固形分が45質量%近くになるまでロータリーエバポレーターで水を除去した。得られた溶液に200gのMIPAを入れ、次に、60℃でロータリーエバポレーターを使用して残りの水を除去した。後半のステップを2回繰り返して溶液からさらに水を取り除いた。最後に、MIPAを加えることで全SiO2ナノ粒子の濃度を45.59質量%に調整して、20nmの平均粒径を有する表面改質SiO2ナノ粒子を含有するSiO2ゾル(以下、変性シリカゾルという。)を得た。
3.903gのNALCO(商標)2329K、0.392gのEBECRYL(商標)11、及び0.008gのSACを混合した。光重合開始剤として0.06gのIrgacure 2959、及びレベリング剤として0.004gのBYK UV3535を混合物に添加した。次に、1.600gのEtOH、2.400gのMIPA、及び1.697gの蒸留水を混合物に加え、コーティング剤1を調製した。
下記の表2に示される配合割合を採用したこと以外は、コーティング剤1と同様にしてコーティング剤2〜5を各々調製した。なお、表2中の配合量は全てグラムである。
3.510gの変性シリカゾル、0.392gのEBECRYL(商標)11、及び0.008gのSACを混合した。光重合開始剤として0.06gのIrgacure 2959を混合物に添加した。次に、1.600gのEtOH、2.400gのMIPA、及び0.822gの蒸留水を混合物に加え、コーティング剤6を調製した。
3.510gの変性シリカゾル、0.392gのEBECRYL(商標)11、及び0.008gのSACを混合した。光重合開始剤として0.06gのIrgacure 2959、及び撥水性添加剤として0.008gのTEGO(商標)Rad 2250を混合物に添加した。次に、1.600gのEtOH、2.400gのMIPA、及び1.198gの蒸留水を混合物に加え、コーティング剤7を調製した。
3.510gの変性シリカゾル、0.392gのEBECRYL(商標)11、及び0.008gのSACを混合した。光重合開始剤として0.06gのIrgacure 2959、及び撥水性添加剤として0.008gのKY 1203を混合物に添加した。次に、1.600gのEtOH、2.400gのMIPA、及び1.780gの蒸留水を混合物に加え、コーティング剤8を調製した。
コーティング剤1を、メイヤーロッド#8を用いて、プライマー層を備えるアルミニウム基材のプライマー層上に塗布し、大気雰囲気下において60℃で5分間乾燥した。次に、コーティング層を適用した基材を、窒素雰囲気下で紫外線照射器(Fusion UV System Inc.のH−バルブ(DRSモデル))に二度通して、コーティング層を硬化させた。このとき、照度700mW/cm2、積算光量900mJ/cm2の条件で、紫外線(UV−A)をコーティング層に対して照射した。このようにして、厚さ1.0マイクロメートルのコーティング層を有する積層体を作製した。
表3に示されるコーティング剤を使用したこと以外は、例1と同様にして例2〜例4の積層体を作製した。
JIS H 4000に準拠した縦100mm×横50mm×厚さ1.0mmのアルミニウム基材を使用した。
コーティング剤3及びメイヤーロッド#20を用いたこと以外は、例1と同様にして比較例2の積層体を作製した。
表3に示されるコーティング剤を使用したこと以外は、例1と同様にして比較例3〜5の積層体を作製した。
Claims (13)
- 基材、並びに
第1の無機ナノ粒子、及び親水性バインダーを含有し、かつ、19.0度以下の水接触角を呈する防霜層を含む、防霜用積層体。 - 前記第1の無機ナノ粒子が、前記防霜層の総重量に基づき、75質量%以上含まれている、請求項1に記載の積層体。
- 前記第1の無機ナノ粒子の平均粒子径が、15nm以上である、請求項1又は2に記載の積層体。
- 前記防霜層表面の算術平均表面粗さRaが、1.0nm以上である、請求項1〜3のいずれか一項に記載の積層体。
- 前記親水性バインダーが、ポリエチレングリコール、水酸基を有する樹脂、並びに、両性イオン、エチレンオキシド及びプロピレンオキシドから選択される少なくとも1つを有する(メタ)アクリル系樹脂から選ばれる少なくとも1種である、請求項1〜4のいずれか一項に記載の積層体。
- 前記第1の無機ナノ粒子が、シリカ、アルミナ、酸化チタン、酸化亜鉛、酸化ジルコニウム、スズドープ酸化インジウム、及びアンチモンドープ酸化スズから選ばれる少なくとも1種の粒子である、請求項1〜5のいずれか一項に記載の積層体。
- 前記防霜層が、第1のシランカップリング剤をさらに含む、請求項1〜6のいずれか一項に記載の積層体。
- 前記基材と前記防霜層との間に、第2の無機ナノ粒子及び第2のシランカップリング剤を含有するプライマー層をさらに含む、請求項1〜7のいずれか一項に記載の積層体。
- 前記プライマー層中の前記第2の無機ナノ粒子の含有量が、前記防霜層中の前記第1の無機ナノ粒子の含有量よりも少ない、請求項8に記載の積層体。
- 前記第2の無機ナノ粒子が、シリカ、酸化チタン、酸化亜鉛、シリカで被覆された酸化チタン、及びシリカで被覆された酸化亜鉛から選ばれる少なくとも1種の粒子である、請求項8又は9に記載の積層体。
- 前記基材が、アルミニウムを含む、請求項1〜10のいずれか一項に記載の積層体。
- 請求項1〜11のいずれか一項に記載の積層体を備える、熱交換器。
- 第1の無機ナノ粒子、並びに親水性バインダー、親水性硬化型モノマー及び親水性硬化型オリゴマーから選択される少なくとも一種を含有する防霜用コーティング剤であって、該防霜用コーティング剤によって形成された防霜層が、19.0度以下の水接触角を呈する、防霜用コーティング剤。
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JP2019070135A JP2020169240A (ja) | 2019-04-01 | 2019-04-01 | 防霜用積層体、該積層体を備える熱交換器、及び防霜用コーティング剤 |
EP20717965.6A EP3947569A1 (en) | 2019-04-01 | 2020-03-27 | Laminate for frost prevention, heat exchanger including the laminate, and coating agent for frost prevention |
PCT/IB2020/052933 WO2020201957A1 (en) | 2019-04-01 | 2020-03-27 | Laminate for frost prevention, heat exchanger including the laminate, and coating agent for frost prevention |
US17/593,359 US20220186047A1 (en) | 2019-04-01 | 2020-03-27 | Laminate for frost prevention, heat exchanger including the laminate, and coating agent for frost prevention |
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JP2019070135A JP2020169240A (ja) | 2019-04-01 | 2019-04-01 | 防霜用積層体、該積層体を備える熱交換器、及び防霜用コーティング剤 |
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JPWO2012157325A1 (ja) | 2011-05-17 | 2014-07-31 | 関西ペイント株式会社 | 熱交換器フィンの着霜抑制用の水系塗料組成物、着霜抑制用皮膜の形成方法、及び着霜抑制用皮膜を有する熱交換器フィン |
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