JP2021527734A - 消泡剤活性物質、その製造方法、及び消泡配合物 - Google Patents
消泡剤活性物質、その製造方法、及び消泡配合物 Download PDFInfo
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Abstract
【選択図】図2
Description
以下の実施例では、シリコーン油、及びポリジメチルシロキサン、又はPDMSは、互換的に使用される。表1は、中央粒径(PS)D50、BET表面積(BET)、及び細孔容積(PV)などの、使用される粒子の特性を列挙する。
各リンカーPDMSは、2つのOH基からなり、したがって、各鎖上のOH基の重量パーセントは、以下のとおりである。
OH含有量%=2×17/ポリマーのMW×100%
例えば、15,000ダルトンのモル分子量のポリマー鎖については、OH含有量%=2×17/15000=0.226%
一般的な結合手順
結合手順1:
結合手順2:
結合手順3:
試験方法
疎水性試験
遊離シリコーン評価
1).洗浄工程の間、疎水化粒子をトルエンで十分に洗浄した。4回の洗浄後、疎水化粒子を110℃で4時間乾燥させた。
2).LECO器具を用いる燃焼法により、洗浄工程前後の疎水化粒子について元素炭素分析を実行した。洗浄工程後の疎水化粒子に対する元素炭素分析の結果を、洗浄工程前の疎水化粒子、すなわち、未洗浄の疎水化粒子のものと比較した。
3).洗浄工程前後の疎水化粒子に対する炭素値の差を計算する。この差は、物理的に吸着しているPDMSの量の指標であった。ゼロ又はゼロに近い値は、100%又は100%に近いPMDSが化学的に結合していることを示唆している。
反応速度研究
粒子の苛性処理
実施例
実施例1〜4
疎水化粒子の疎水性に対するシリカ粒子表面積の影響
実施例5〜7
反応速度に対するシリカ粒子表面pHの影響
実施例8〜11
より小さい表面積を有するシリカ粒子を含む疎水化粒子の疎水性性能に十分な、より低い量のPDMS
実施例12及び13
反応速度に対するPDMSの分子量の効果
実施例14及び15
反応速度に対するシラノール末端PDMSの効果
実施例16
疎水化粒子のスパイラルジェットミル生産
Claims (32)
- 3以下の炭素含有量を有する疎水化シリカ粒子を含む、消泡剤活性物質であって、
前記疎水化粒子が、約150m2/g未満のBET表面、少なくとも約10の表面pH、及び約2μm〜約50μmの範囲の中央粒径を有するシリカ粒子を含み、
前記疎水化シリカ粒子が、その前記表面上に疎水化剤を含む、消泡剤活性物質。 - 前記シリカ粒子の前記BET表面が、約100m2/g未満である、請求項1に記載の消泡剤活性物質。
- 前記シリカ粒子の前記BET表面が、約60m2/g未満である、請求項2に記載の消泡剤活性物質。
- 前記疎水化シリカ粒子の前記炭素含有量が、2.0%以下である、請求項1に記載の消泡剤活性物質。
- 前記疎水化シリカ粒子の前記中央粒径が、約2μm〜約15μmの範囲である、請求項1に記載の消泡剤活性物質。
- 前記シリカ粒子の前記表面pHが、少なくとも約10である、請求項1に記載の消泡剤活性物質。
- 前記疎水化剤が、シリコーン化合物である、請求項1に記載の消泡剤活性物質。
- 前記シリコーン化合物が、ポリジメチルシロキサンであり、前記ポリジメチルシロキサンが、少なくとも3,000Daの平均モル質量を有する、請求項7に記載の消泡剤活性物質。
- 前記ポリジメチルシロキサンが、少なくとも5,000Daの平均モル質量を有する、請求項8に記載の消泡剤活性物質。
- 前記ポリジメチルシロキサンが、シラノール末端ポリジメチルシロキサンである、請求項8に記載の消泡剤活性物質。
- 前記シラノール末端ポリジメチルシロキサンが、少なくとも0.10重量%のヒドロキシル基の含有量を有する、請求項10に記載の消泡剤活性物質。
- 前記シラノール末端ポリジメチルシロキサンが、少なくとも3600センチポアズの粘度を有する、請求項10に記載の消泡剤活性物質。
- 前記シリカの前記表面上の前記疎水化剤のうちの少なくとも90重量%が、前記シリカ粒子に共有結合している、請求項1に記載の消泡剤活性物質。
- 前記疎水化剤のうちの少なくとも95重量%が、前記シリカ粒子に共有結合している、請求項13に記載の消泡剤活性物質。
- 前記疎水化シリカ粒子が、60%対40%の体積比を有するメタノールと水との混合溶媒中の浮揚法に従って測定して、少なくとも2の疎水性評価を有する、請求項1に記載の消泡剤活性物質。
- 前記疎水化剤が、前記疎水化シリカ粒子の総重量に基づいて、8重量%以下の量である、請求項1に記載の消泡剤活性物質。
- 前記疎水化剤が、前記疎水化(hdrophobized)シリカ粒子の総重量に基づいて、6重量%以下の量である、請求項16に記載の消泡剤活性物質。
- 前記消泡剤活性物質が、連続スパイラルジェットミルプロセスによって調製される、請求項1に記載の消泡剤活性物質。
- 請求項1に記載の変形活性物質を含む、消泡配合物。
- 請求項19に記載の消泡配合物を含む、コーティング配合物。
- 消泡剤活性物質を形成する方法であって、
スパイラルジェットミル又は流体エネルギーミルを使用して、シリカ粒子を疎水化剤とミル粉砕及び結合させて、疎水化シリカ粒子を得ることを含み、
前記シリカ粒子が、約150m2/g未満のBET表面、少なくとも約10の表面pH、及び約2μm〜約50μmの範囲の中央粒径を有し、
前記疎水化シリカ粒子の炭素含有量が、3%以下である、方法。 - 前記スパイラルジェットミル又は流体エネルギーミルを使用して、前記シリカ粒子を前記疎水化剤とミル粉砕及び結合させて、前記疎水化シリカ粒子を得ることが、
前記シリカ粒子及び前記疎水化剤を、前記スパイラルジェットミル又は流体エネルギーミルに添加することと、
前記シリカ粒子及び前記疎水化剤を、前記スパイラルジェットミル又は流体エネルギーミル内でミル粉砕及び加熱して、前記疎水化シリカ粒子を形成することと、を含む、請求項21に記載の消泡剤活性物質を形成する方法。 - 前記シリカ粒子の前記表面pHが、少なくとも約10である、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記疎水化剤が、前記疎水化シリカ粒子の総重量に基づいて、8重量%以下の量である、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記疎水化剤が、前記疎水化シリカ粒子の総重量に基づいて、6重量%以下の量である、請求項24に記載の消泡剤活性物質を形成する方法。
- 前記疎水化剤が、シリコーン化合物である、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記シリコーン化合物が、ポリジメチルシロキサンであり、前記ポリジメチルシロキサンが、少なくとも3000Daの平均モル質量を有する、請求項26に記載の消泡剤活性物質を形成する方法。
- 前記ポリジメチルシロキサンが、シラノール末端ポリジメチルシロキサンである、請求項27に記載の消泡剤活性物質を形成する方法。
- 前記疎水化剤のうちの少なくとも90重量%が、前記シリカ粒子に共有結合している、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記消泡剤活性物質が、60%対40%の体積比を有するメタノールと水との混合溶媒中の浮揚法に従って測定して、少なくとも2の疎水性評価を有する、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記疎水化シリカ粒子が、約2μm〜約15μmの範囲の中央粒径を有する、請求項21に記載の消泡剤活性物質を形成する方法。
- 前記疎水化シリカ粒子上の前記疎水化剤の総量のうちの10重量%以下が、前記シリカ粒子上に結合せず物理的に吸着している、請求項21に記載の消泡剤活性物質を形成する方法。
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