200811044 九、發明說明： 【發明所屬之技術領域】 本發明關於一種礦物阻燃劑。更特別地，本發明關於 一種新穎之氫氧化鎂阻燃劑，其製法，及其用途。 【先前技術】 現有許多種製造氫氧化鎂之方法。例如在習知鎂法中 ，已知可藉氧化鎂（其係藉由噴灑烘烤氯化鎂溶液而得） 之氫化製造氫氧化鎂，參見例如美國專利第5,286,28 5號及 歐洲專利第EP 04278 17號。亦已知如鐵銹、海鹽或白雲石 之Mg來源可與如石灰或氫氧化鈉之鹼來源反.應形成氫氧 化鎂顆粒，而且亦已知可使Mg鹽與氨反應及形成氫氧化 錶結晶。 氫氧化鎂之工業應用力係已知一段時間。氫氧化鎂已 用於多種應用，由醫藥領域之抗酸劑用途至工業應用之阻 燃劑用途。在阻燃劑領域中，氫氧化鎂係用於合成樹脂（ 如塑膠）及電線與電纜應用，以賦與阻燃劑性質。含氫氧 化鎂合成樹脂之複合性能及黏度爲與氫氧化鎂有關之重要 屬性。在合成樹脂工業中，較佳複合性能及黏度之要求已 因明顯之原因而增加，即複合與擠壓期間之較高輸出，較 佳地流入模具中等。隨此要求增加，較高品質氫氧化鎂顆 粒及其製法之要求亦增加。 【發明内容】 在一個具體實施例中，本發明關於一種方法，其包括 -5- 200811044 硏磨乾燥含氫氧化鎂顆粒之漿液，如此製造經硏磨乾 燥氫氧化鎂顆粒；及 將該經硏磨乾燥氫氧化鎂顆粒去黏聚而製造氫氧化鎂 產物顆粒， 其中漿液含按漿液之總重量計爲約1至約80重量％範 圍之氫氧化鎂顆粒，及其中氫氧化鎂產物顆粒具有約0.01 至約0.5微米範圍之孔半徑中位數（“ ）。 在另一個具體實施例中，本發明關於一種氫氧化鎂顆 _ 粒，其具有： 小於約3.5微米之d5〇; ， 約1至約15之BET表面積比；及 約0.01至約0.5微米範圍之孔徑中位數， 其中該氫氧化鎂顆粒係藉由硏磨乾燥一種含按漿液之 總重量計爲約1至約80重量％範圍之氫氧化鎂的漿液以製 造經硏磨乾燥氫氧化鎂顆粒，及將該經硏磨乾燥氫氧化鎂 顆粒去黏聚以製造氫氧化鎂產物顆粒而製造。 【實施方式】 本發明之方法包括硏磨乾燥一種含按漿液之總重量計 爲約1至約80重量％範圍之氫氧化鎂的漿液，如此製造經 硏磨乾燥氫氧化鎂顆粒。然後使經硏磨乾燥氫氧化鎂顆粒 接受去黏聚處理，因而製造在此所述之氫氧化鎂產物顆粒 〇 .用於本發明實務之漿液可得自用於製造氫氧化鎂顆粒 之任何方法。在一個例示具體實施例中，漿液係得自一種 -6- 200811044 包括將水加入氧化鎂（其較佳爲得自噴灑烘烤氯化鎂溶液 )以形成氧化鎂水性懸浮液之方法。此懸浮液一般包括按 懸浮液之總重量計爲約1至約85重量％之氧化鎂。然而其 可改變氧化鎂濃度以落在下述討論漿液接受硏磨乾燥時之 範圍內。然後使水與氧化鎂懸浮液在包括溫度範圍爲約50 °C至約1 00°C且持續攪拌之條件下反應，如此得到包括氫氧 化鎂顆粒與水之混合物或漿液（有時稱爲第一漿液）。此 漿液可直接硏磨乾燥，但是在較佳具體實施例中，將此漿 # 液過濾以去除至少一部分（較佳爲實質上所有）溶於水中 之任何雜質，如此形成濾餅，及將濾餅以〇水，ii)分散劑 ，或iii)其任何組合再漿化，如此形成接受硏磨乾燥之漿液 (有時稱爲第二漿液）。在將濾餅再漿化前，其可以去鹽 水清洗一次，或在某些具體實施例超過一次。 在將濾餅以水再漿化時，（第二）漿液一般包括按漿 液之總重量計爲1至約45重量％範圍之氫氧化鎂顆粒。在 較佳具體實施例中，漿液包括按漿液之總重量計爲約1 0至 ® 約45重量％，更佳爲約20至約40重量％，最佳爲約25至 約35重量％範圍之氫氧化鎂。在此具體實施例中，其餘漿 液較佳爲水，更佳爲去鹽水。 .如果將濾餅以分散劑或分散劑與水之組合再漿化，則 因分散劑之效應，漿液可含按漿液之總重量計至多約80重 量％之氫氧化鎂。因此在此具體實施例中，漿液一般包括按 漿液之總重量計爲約1至約80重量％範圍之氫氧化鎂顆粒 :較佳爲漿液包括按漿液之總重量計爲約30至約75重量％ 200811044 ，更佳爲約3 5至約7 0重量％，最佳爲約4 5至約6 5重量％ 範圍之氫氧化鎂顆粒。 適合在此使用之分散劑的非限制實例包括聚丙烯酸酯 、有機酸、萘磺酸酯/甲醛縮合物、脂肪醇-聚二醇醚、聚 丙烯-環氧乙烷、聚二醇酯、多胺-環氧乙烷、磷酸酯、聚 乙烯醇。 在已將濾餅再漿化後，將漿液硏磨乾燥以製造經硏磨 乾燥氫氧化鎂顆粒。在此使用之「硏磨乾燥」（mill drying) Φ 及「經硏磨乾燥」（mill dried)表示將（第二）漿液在硏磨 乾燥單元之擾流熱氣流中乾燥。硏磨乾燥單元包括堅固地 安裝在以高周速轉動之實心軸上的轉子。結合高空氣輸出 之轉動移動將流經之熱空氣轉化成極快之空氣渦動，其帶 動欲乾燥之漿液，加速之，及分布且乾燥漿液而製造具有 較大表面積（如上述BET所測定）之經硏磨乾燥氫氧化鎂 顆粒，然後成爲漿液中之起始氫氧化鎂顆粒。在已完全乾 燥後將經硏磨乾燥塗覆ATH顆粒經擾流空氣運出硏磨機， ® 而且使用習知過濾器系統自熱空氣及蒸氣分離。在已完全 乾燥後，將氫氧化鎂顆粒經擾流空氣運出硏磨機，而且使 用習知過濾器系統自熱空氣及蒸氣分離。 用於硏磨漿液之熱空氣的輸出一般大於約3,000 Bm3/ 小時，較佳爲大於約5,000 Bm3/小時，更佳爲大於約3,000 Bm3/小時至約40,000 Bm3/小時，而且最佳爲約5,000 Bm3/ 小時至約30,000 Bm3/小時。 爲了達成此高輸出，硏磨乾燥單元之轉子一般具有大 -8- 200811044 於約40米/秒，較佳爲大於約60米/秒，更佳爲大於約70 米/秒，而且最佳爲約70米/秒至約140米/秒範圍之周速。 轉子之高轉速及高熱空氣輸出造成雷諾數大於約3,000之 熱氣流。 用於硏磨乾燥漿液之熱氣流的溫度通常大於約150°C ，較佳爲大於約270°C。在一個更佳具體實施例中，熱氣流 之溫度爲約150°C至約550°C之範圍，最佳爲約270°C至約 500°C之範圍。 • 如上所述，硏磨乾燥漿液製造具有較大表面積（如上 述BET所測定）之經硏磨乾燥氫氧化鎂顆粒，然後成爲（ 第二）漿液中之起始氫氧化鎂顆粒。一般而言，經硏磨乾 燥氫氧化鎂之BET大於漿液中氫氧化鎂顆粒超過約10%。 較佳爲經硏磨乾燥氫氧化鎂之BET爲大於漿液中氫氧化鎂 :顆粒約10%至約40%之範圍。更佳爲經硏磨乾燥氫氧化鎂 之BET爲大於漿液中氫氧化鎂顆粒約10%至約25%之範圍 〇 ^ 如此製造之經硏磨乾燥氫氧化鎂顆粒可「直接」用於 許多應用。然而在某些具體實施例中，其將經硏磨乾燥氫 氧化鎂顆粒進一步處理以減少，或在某些具體實施例中排 除存在於經硏磨乾燥氫氧化鎂顆粒之黏聚物。黏聚物之形 成在氫氧化鎂顆粒製法中常見，而且其存在可及在某些應 用中確實有害地影響樹脂中氫氧化鎂顆粒之性能。因此氫 氧化鎂製造者極希望減少，較佳爲排除黏聚物。 在本發明之實務中，存在於經硏磨乾燥氫氧化鎂顆粒 -9- 200811044 之黏聚物的數量或黏聚程度係藉由使經硏磨乾燥氫 顆粒接受進一步去黏聚處理步驟而降低。去黏聚表 硏磨乾燥氫氧化鎂顆粒接受進一步處理’其中減少 具體實施例中實質上排除存在於經硏磨乾燥氫氧化 中之黏聚物的數量或黏聚程度（即存在於經硏磨乾 化鎂顆粒中之黏聚物的數量大於存在於氫氧化鎂產 中之黏聚物的數量），而經硏磨乾燥氫氧化鎂之粒 極小。「少量縮減粒徑」表示氫氧化鎂產物顆粒之（ # 或等於經硏磨乾燥氫氧化鎂顆粒之90%。經硏磨乾 顆粒之其餘性質係與由將經硏磨乾燥ATH顆粒去黏 造之ATH產物顆粒相同或實質上相同。在較佳具體 中，經硏磨乾燥氫氧化鎂之d5〇爲經乾式硏磨氫氧化 之約90%至約95%範圍，更佳爲在經硏磨乾燥氫氧 粒之約95%至約99%範圍內。 減少存在於經硏磨乾燥氫氧化鎂顆粒中之黏聚 用此技藝已知有效減少黏聚物之任何技術達成。在 ® 體實施例中，去黏聚作用係經由使用空氣分類機或 磨機而達成。在某些具體實施例中，去黏聚作用係 用一或更多個銷式硏磨機，在其他具體實施例中爲 多個空氣分類機而達成。 適合在此使用之空氣分類機包括使用重力、離 慣性力、或其任何組合而將氫氧化鎂產物顆粒分類 用這些分類機在此技藝爲已知的，而且熟悉此技藝 所需最終產物大小者可易於選擇含適當網及/或篩 氧化鎂 示使經 在某些 鎂顆粒 燥氫氧 物顆粒 度減小 〖5。大於 m ATH 聚而製 實施例 鎂顆粒 化鎂顆 物可使 較佳具 銷式硏 經由使 一或更 心力、 者。使 且熟知 之分類 -10- 200811044 機0 適合在此使用之銷式硏磨機包括乾及濕銷式硏磨機。 如同空氣分類機，使用銷式硏磨機在此技藝爲已知的，而 且熟悉此技藝且熟知所需最終氫氧化鎂產物顆粒性質者可 易於選擇最佳銷式硏磨機而符合特定應用。 本發明方法製造之氫氧化鎂顆粒可特徵爲具有按 DIN-66132測定爲約1至約15平方米/克範圍之BET表面積 比。在一個較佳具體實施例中，依照本發明之氫氧化鎂產 ® 物顆粒具有約1至約5平方米/克範圍，更佳爲約2.5至約 4平方米/克範圍之BET表面積比。在另一個較佳具體實施 例中，氫氧化鎂產物顆粒具有約3至約7平方米/克範圍， 更佳爲約4至約6平方米/克範圍之BET表面積比。在另一 • 個較佳具體實施例中，氫氧化鎂產物顆粒具有約6至約1 0 平方米/克範圍，更佳爲約7至約9平方米/克範圍之BET 表面積比。在又一個較佳具體實施例中，氫氧化鎂產物顆 粒具有約8至約1 2平方米/克範圍，更佳爲約9至約1 1平 — 方米/克範圍之BET表面積比。 氫氧化鎂產物顆粒可且一般亦特徵爲具有小於約3.5 微米之d5〇。在一個具體實施例中，本發明之氫氧化鎂產物 顆粒特徵爲具有約1.2至約3.5微米範圍，更佳爲約i. 45 至約2·8微米範圍之d5。。在另一個具體實施例中，氫氧化 鎂產物顆粒特徵爲具有約0 · 9至約2 · 3微米範圍，更佳爲約 1 · 2 5至約1 · 6 5微米範圍之d 5。。在另一個具體實施例中，氫 氧化鎂產物顆粒特徵爲具有約0.5至約1.4微米範圍，更佳 200811044 爲約0.8至約1.1微米範圍之d5〇。在又一個具體實施例中 ，氫氧化鎂產物顆粒特徵爲具有約0.3至約1.3微米範圍， 更佳爲約0.65至約0.95微米範圍之ch。。 應注意，在此報告之 d5〇測量係藉使用 Malvern Mastersizer S雷射繞射機依照ISO 9276之雷射繞射而測定 。爲此目的而使用得自Merck/德國之EXTRΑΝ ΜA02的0.5% 溶液且施加超音波。EXTRΑΝ ΜΑ02爲一種降低水表面張力 之添加劑且用於清潔鹼敏感性物質。其含陰離子性與非離 • 子性界面活性劑、磷酸鹽、及少量之其他物質。其使用超 音波將顆粒去黏聚。 氫氧化鎂顆粒亦可特徵爲具有指定之平均孔半徑中位 數（“ r5。”）。氫氧化鎂產物顆粒之no可得自汞孔隙術。汞 孔隙術之原理係基於非反應性、未潤濕液體不穿透孔直到 施加充分壓力以強迫其進入之物理原理。因此液體進入孔 所需之壓力越高，則孔度越小。其發現較小之孔度與氫氧 化鎂顆粒之較佳潤濕力有關。氫氧化鎂產物顆粒之孔度可 ^ 使用得自義大利 Carlo Erba Strumentazione 之 Porosimeter 2 0 0 0由得自隶孔隙術之資料計算。依照P 〇 r 〇 s i m e t e r 2 0 0 0 之手冊，其使用以下方程式由測量之壓力p計算孔半徑r :r = -2YC〇s(e)/p;其中Θ爲潤濕角度及γ爲表面張力。在此採 用之測量係使用14 1.3°之Θ値且將γ設爲480達因/公分。 爲了改良測量之再現力，其由第二氫氧化鎂入侵測試 計算孔度，如Porosimeter 2000之手冊所述。第二測試係因 爲發明人觀察到在擠壓後，即在將壓力釋放至周圍壓力後 -12- 200811044 ，氫氧化鎂產物顆粒之樣品中殘留體積爲V。之汞量而使用 。如此可由參考第1、2及3圖所解釋之資料得到r5。。 在第一測試中，其如Porosimeter 2000之手冊所述而製 備氫氧化鎂產物樣品，及使用2000巴之最大壓力測量孔體 •積如所施加入侵壓力p之函數。在第一測試結束時釋放壓 力且達到周圍壓力。實行利用得自第一測試之相同樣品的 第二入侵測試（依照Porosimeter 2000之手冊），其中第二 測試之孔體積比V(p)測量取體積V〇作爲新開始體積，然後 # 對第二測試將其設爲零。 在第二入侵測試中再度使用2000巴之最大壓力實行 樣品之孔體積比V(p)測量如所施加入侵壓力p之函數。第 1圖顯示對於市售氫氧化鎂級，第二入侵測試（使用如第 一測試之相同樣品）之孔體積比V如施加入侵壓力之函數 〇 由氫氧化鎂產物顆粒樣品之第二入侵測試，藉 Porosimeter 2000依照公式r = -2ycos(e)/p計算孔半徑r;其 ® 中Θ爲潤濕角度，γ爲表面張力，及P爲入侵壓力。對於在 此採用之所有r測量均使用141.3。之Θ値且將γ設爲480 達因/公分。孔體積比可如此以孔半徑r之函數表示。第2 圖顯示第二入侵測試（使用得自第一測試之相同氫氧化鎂 產物顆粒樣品）之孔體積比V如孔半徑r之函數。 第3圖顯示第二入侵測試之標準化孔體積比如孔半徑 r之函數，即在此曲線中，將第二入侵測試之最大孔體積比 設爲1 00%，及將其他體積比除以此最大値。按定義，在此 -13- 200811044 將相對孔體積比50%處之孔半徑稱爲孔半徑中位數n〇。例 如依照第3圖，市售氫氧化鎂之孔半徑中位數r5。爲0.248 微米。 使用依照本發明製造之氫氧化鎂產物顆粒樣品重複上 述步驟，而且發現依照本發明製造之氫氧化鎂產物顆粒具 有約0.01至約0.5微米範圍之r5〇。在本發明之一個具體實 施例中，氫氧化鎂產物顆粒之爲約0.20至約0.4微米之 範圍，更佳爲約0.23至約0.4微米之範圍，最佳爲約0.25 # 至約0.35微米之範圍。在另一個具體實施例中，r5。爲約0.15 至約0.25微米之範圍，更佳爲約0.16至約0.23微米之範 圍，最佳爲約0.175至約0.22微米之範圍。在又一個具體 實施例中，r5〇爲約0.1至約0.2微米之範圍，更佳爲約0.1 至約0.16微米之範圍，最佳爲約0.12至約0.15微米之範 圍。在又一個具體實施例中，r5(>爲約0.05至約0.15微米 之範圍，更佳爲約0.07至約0.13微米之範圍，最佳爲約 0.1至約0.12微米之範圍。 ^ 在某些具體實施例中，依照本發明製造之氫氧化鎂產 物顆粒進一步特徵爲具有約15%至約40%範圍之亞麻油吸 油性。在一個具體實施例中，依照本發明製造之氫氧化鎂 產物顆粒可進一步特徵爲具有約16%至約25%範圍，更佳 爲約17%至約25%範圍，最佳爲約19%至約24%範圍之亞麻 油吸油性。在另一個具體實施例中，依照本發明製造之氫 氧化鎂產物顆粒可進一步特徵爲具有約20%至約28%範圍 ，更佳爲約21 %至約27 %範圍，爲佳爲約22%至約26%範圍 -14- 200811044 之吸油性。在又一個具體實施例中，依照本發明製造之氫 氧化鎂產物顆粒可進一步特徵爲具有約24%至約32%範圍 ，更佳爲約2 5 %至約3 1 %範圍，最佳爲約2 6 %至約3 0 %範圍 之亞麻油吸油性。在又一個具體實施例中，依照本發明製 造之氫氧化鎂顆粒可進一步特徵爲具有約27 %至約34%範 圍，更佳爲約28%至約33%範圍，最佳爲約28%至約32% 範圍之亞麻油吸油性。 依照本發明之氫氧化鎂產物顆粒可在各種合成樹脂中 • 作爲阻燃劑。其中可使用氫氧化鎂顆粒之熱塑性樹脂的非 限制實例包括聚乙烯、聚丙烯、乙烯-丙烯共聚物、C2至 C8烯烴（α-烯烴）之聚合物與共聚物（如聚丁烯、聚（4-甲基戊烯-1 )等）、這些烯烴與二烯之共聚物、乙烯-丙烯 酸酯共聚物、聚苯乙烯、ABS樹脂、AAS樹脂、AS樹脂、 MBS樹脂、乙烯-氯乙烯共聚物樹脂、乙烯-乙酸乙烯酯共 聚物樹脂、乙烯-氯乙烯-乙酸乙烯酯接枝聚合物樹脂、氯 亞乙烯、聚氯乙烯、氯化聚乙烯、氯化聚丙烯、氯乙烯-丙 — 烯共聚物、乙酸乙烯酯樹脂、苯氧樹脂、聚縮醛、聚醯胺 、聚醯亞胺、聚碳酸酯、聚颯、聚苯醚、聚苯硫醚、聚對 酞酸伸乙酯、聚對酞酸伸丁酯、甲基丙烯酸酯等。適當合 成樹脂之進一步實例包括熱固性樹脂，如環氧樹脂、酚樹 脂、三聚氰胺樹脂、不飽和聚酯樹脂、醇酸樹脂、與脲樹 脂，及天然或合成橡膠，如EPD Μ、丁基橡膠、異戊二烯橡. 膠、SBR、NIR、胺基甲酸酯橡膠、聚丁二烯橡膠、丙烯酸 橡膠、聚矽氧橡膠，亦包括氟彈性體、NBR、與氯磺化聚 -15- 200811044 乙烯。其進一步包括聚合懸浮液（乳膠）。 較佳爲合成樹脂爲聚丙烯爲主樹脂，如聚丙烯同元聚 合物與乙烯-丙烯共聚物；聚乙烯爲主樹脂，如高密度聚乙 烯、低密度聚乙烯、直鏈低密度聚乙烯、超低密度聚乙烯 、EVA (乙烯·乙酸乙烯酯樹脂）、EEA (乙烯-丙烯酸乙酯 樹脂）、EMA (乙烯-丙烯酸甲酯共聚物樹脂）、EAA (乙 烯-丙烯酸共聚物樹脂）、與超高分子量聚乙烯；及C2至 C8烯烴（烯烴）之共聚物，如聚丁烯與聚（4-甲基戊烯 • -1 ) ’聚氯乙烯與橡膠。在一個更佳具體實施例中，合成 樹脂爲聚乙烯爲主樹脂。 發明人已發現，使用依照本發明製造之氫氧化鎂產物 顆粒作爲合成樹脂中之阻燃劑，可達成含氫氧化鎂合成樹 脂之較佳複合性能及較佳黏度性能，即較低之黏度。由含 氫氧化鎂合成樹脂製造最終擠壓或模塑物件之複合者、製 造者等極需要較佳之複合性能及較佳之黏度。 較佳之複合性能表示混合依照本發明製造之氫氧化鎂 胃 產物顆粒的合成樹脂所需之複合機（如Buss Κο-捏合機或 雙螺絲擠壓機）的能量程度變動小於混合含習知氫氧化鎂 顆粒之合成樹脂的複合機。能量程度變動越小，則欲混合 或擠壓之材料輸出越高及/或材料越均勻（均質）。 . . 較佳之黏度性能表示含依照本發明製造之氫氧化鎂產 物顆粒的合成樹脂之黏度低於含習知氫氧化鎂顆粒之合成 樹脂。此較低黏度可得較快之擠壓及/或模具充塡，較低之 擠壓或充塡模具所需壓力等，如此增加擠壓速度及/或減少 -16- 200811044 模具充塡時間且可增加輸出。 因此在一個具體實施例中，本發明關於一種包括至少 一種，在某些具體實施例中爲僅一種上述合成樹脂、及阻 燃量之氫氧化鎂產物顆粒的阻燃聚合物調配物，及由阻燃 聚合物調配物製造之模塑及/或擠壓物件。 阻燃量之氫氧化鎂產物顆粒通常表示按阻燃聚合物調 配物之重量計爲約5重量％至約9 0重量％之範圍，而且更 佳爲按相同之計算基礎約20重量％至約70重量％之範圍。 # 在一個最佳具體實施例中，阻燃量按相同之計算基礎爲約 30重量％至約65重量％之氫氧化鎂產物顆粒。 阻燃聚合物調配物亦可含此技藝常用之其他添加劑。 適合用於本發明阻燃聚合物調配物之其他添加劑的非限制 實例包括擠壓助劑，如聚乙烯蠟、Si爲主擠壓助劑、脂肪 酸；偶合劑，如胺基-、乙烯基-或烷基矽烷或順丁烯二酸 接枝聚合物；硬脂酸鋇或硬脂酸鈣；有機過氧化物；染料 ;顏料；塡料；發泡劑；除味劑；熱安定劑；抗氧化劑； ® 抗靜電劑；強化劑；金屬清除劑或鈍化劑；衝擊調節劑； 處理助劑；模具釋放助劑、潤滑劑；抗阻塞劑；其他阻燃 劑；UV安定劑；塑性劑；流動助劑等。如果需要，則晶核 生成劑（如矽酸鈣或靛藍）亦可包括於阻燃聚合物諷配物 。其他選用添加劑之比例爲習知且可改變以符合任何特定 狀況所需。 阻燃聚合物調配物之成分的倂入及加入方法、及進行 模塑之方法對本發明並不重要，而且可爲任何此技藝已知 -17- 200811044 ，只要選擇之方法涉及均勻混合及模塑。例如可使用Buss Ko-捏合機、內部混合器、Farrel連續混合器、或雙螺絲擠 壓器，或在某些情形及單螺絲擠壓器或二輥硏磨機，混合 各以上成分及選用添加劑（如果使用），然後在後續處理 步驟中模塑阻燃聚合物調配物。此外阻燃聚合物調配物之 模塑物件可在如拉伸處理、壓花處理、塗覆、印刷、電鍍 、穿孔、或切割之製造應用後使用。經捏合混合物亦可充 氣模塑、注射模塑、擠壓模塑、吹製模塑、壓製模塑、轉 # 動模塑、或壓延模塑。 在擠壓物件之情形，其可使用已知對上述合成樹脂混 合物有效之任何擠壓技術。在一種例示技術中，其在複合 機中將合成樹脂、氫氧化鎂產物顆粒與選用成分（如果選 擇）複合以形成上述阻燃樹脂調配物。然後在擠壓機中將 阻燃樹脂調配物加熱至熔化狀態，然後將熔化之阻燃樹脂 調配物經選擇模擠壓以形成擠壓物件，或塗覆例如資料傳 輸用金屬線或玻璃纖維。 ® 以上之說明係關於數個本發明之具體實施例。熟悉此 技藝者應了解，其可設計帶有本發明精神之同樣有效的其 他方式。亦應注意，本發明之較佳具體實施例預期在此討 .論之所有範圍包括任何較低量至任何較高量之範圍。例如 在討論氫氧化鎂產物顆粒之吸油性時，其預期約1 5 %至約 ‘17%、約15 %至約27 %等之範圍均在本發明之範圍內。 以下之實例描述本發明但絕非限制。 實例 -18- 200811044 以下實例中所述之η。係使用Porosimeter 2000由永孔 隙術而得。除非另有指示，所有之^。、BET、吸油性等係 依照上述技術測量。 實例 將2 00公升/小時之氫氧化鎂與33重量％固體含量之水 漿液進料至乾式硏磨機。漿液中之氫氧化鎂在乾式硏磨前 具有4.5平方米/克之BET表面積比及1.5微米之粒度中位 數。硏磨機係在包括3000-3500 Bm3/小時間之空氣流速、 ® 29〇-320°C之溫度、及100米/秒之轉子速度的條件下操作。 在硏磨後，經空氣過濾系統由熱氣流收集經硏磨乾燥 氫氧化鎂顆粒。所回收氫氧化鎂顆粒之產物性質示於以下 表1。 實例2-比鮫忡 在此實例中，將用於實例1之相同氫氧化鎂漿液噴灑 乾燥而非接受硏磨乾燥。所回收氫氧化鎂顆粒之產物性質 示於以下表1。 表1 BET (m2/g) 粒度中位數cb _ 吸油性 (%) 孔半徑中位數（“r5。”） (μπι) 實例2-比較性 4.8 1.56 .36.0 0.248 實例1-依照本發明 5.9 1.38 27.5 0.199 在表1中可見到，依照本發明之氫氧化鎂（實例1 ) 的表面積比BET較漿液中之起始氫氧化鎂顆粒增加超過 3 0%。此外，依照本發明之最終氫氧化鎂顆粒的吸油性較藉 習知乾燥製造之氫氧化鎂顆粒低約23.6%。此外依照本發 明之氫氧化鎂顆粒的η。較習知地乾燥之氫氧化鎂顆粒小 -19- 200811044 約20%，顯示優異之潤濕特徵。 實例3 分別地使用實例2之比較性氫氧化鎂顆粒及實例1之 依照本發明之氫氧化鎂顆粒形成阻燃樹脂調配物。使用之 合成樹脂爲得自 ExxonMobil 之 EVA Escorene® Ultra UL00328，其具有得自 ExxonMobil 之 LLDPE 級 LL1001XV 、由 Albemarle® Corporation 市售之 Ethanox® 310 抗氧化 劑、及得自Degussa之胺基砂院Dynasylan AMEO。將成分 # 在46毫米Buss Ko-捏合機（L/D比例=11 )以按熟悉此技藝 者熟知之一般方式選擇之溫度設定及螺絲速以22公斤/小 時之輸出混合。用於調配阻燃樹脂調配物之各成分量詳述 於以下表2 : 表2 Phr (每百份全部樹脂之份） Escorene Ultra UL00328 80 LL1001XV 20 氫氧化鎂 150 AME0矽烷 1.6 Ethanox 310 0.6 在形成阻燃樹脂調配物時，首先在Buss複合前將 AME0矽烷及Ethanox® 310與合成樹脂總量在桶中摻合。 因在重量進料機中之損失，將樹脂/矽烷/抗氧化劑摻合物與 氫氧化鎂總量之50%進料至Buss捏合機之第一入口，而且 將其餘50%之氫氧化鎂進料至Buss捏合機之第二進料口。 排放擠壓器係垂直BUSS-K〇捏合機而突起且螺絲大小爲70 毫米。第4圖顯示對於比較性氫氧化鎂顆粒（實例2)， 排放擠壓器之功率圖及Buss Ko-捏合器馬達之功率圖，第 -20- 200811044 .5圖爲本發明氫氧化鎂顆粒（實例1 )。 如第4及5圖所證，在將依照本發明之氫氧化鎂顆粒 用於阻燃樹脂調配物時，Buss Ko-捏合器之能量（功率） 變動顯著地降低，特別是排放擠壓器。如上所述，能量程 度之變動越小則輸出越高及/或阻燃樹脂調配物越均勻（均 質）。 實例3 爲了測定實例2製造之阻燃樹脂調配物的機械性質， _ 使用具 Haake Rheomex 擠壓器之 Haake Polylab System 將各 阻燃樹脂調配物擠壓成2毫米厚帶。自帶衝孔而得依照DIN 5 3504之測試棒。此實驗之結果示於以下表3。 表3 比較注 依照本發明 熔化流動指數 @ 150°C/21.6 kg (g/10 min) 2.8 6.0 拉伸強度(MPa) 11.9 13.2 破裂伸長(％) 154 189 氷老化前之電阻率(Ohnrcm) 3·4χ1014 5.2 xlO14 7d@70°C水老化後之電阻率(Ohnrcm) 1.0 xlO14 5.0 xlO14 吸水性(％) 1.01 0.81 如表3所描述，由於較均勻塗覆，依照本發明之阻燃 樹脂調配物（即含依照本發明之氫氧化鎂顆粒）具有優於 比較性阻燃樹脂調配物（即含使用習知方法製造之氫氧化 鎂顆粒）之熔化流動指數。此外依照本發明之阻燃樹脂調 配物的拉伸強度及破裂伸長優於比較性阻燃樹脂調配物。 應注意，熔化流動指數係依照DIN 5 37 3 5測量。拉伸 強度及破裂伸長係依照DIN 5 3 504測量，及水老化前後之 電阻率係對100x 1 00x2立方毫米壓製板依照DIN 5 3482測 量。吸水性％爲1 00x 1 00x2立方毫米壓製板在70°C置於去 -21- 200811044 鹽水浴中老化7日後相對板之起初重量的重量差。 【圖式簡單說明】 第1圖顯示對於市售氫氧化鎂級，氫氧化鎂入侵測試 之孔體積比V如施加壓力之函數。 第2圖顯示氫氧化鎂入侵測試之孔體積比V如孔半徑 r之函數。 第3圖顯示氫氧化鎂入侵測試之標準化孔體積比，此 圖表係將最大孔體積比設爲1 00%，及將其他體積比除以此 •最大値而產生。 第4圖顯示對於實例2之比較性氫氧化鎂顆粒，排放 擠壓器之功率圖及Buss KojM合器馬達之功率圖。 第5圖顯示對於實例1之本發明氫氧化鎂顆粒，排放 擠壓器之功率圖及Buss Ko-捏合器馬達之功率圖。 【主要元件符號說明】 Μ 〇 JW\ -22-200811044 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a mineral flame retardant. More particularly, the present invention relates to a novel magnesium hydroxide flame retardant, a process for its preparation, and uses thereof. [Prior Art] There are many methods for producing magnesium hydroxide. For example, in the conventional magnesium method, it is known to produce magnesium hydroxide by hydrogenation of magnesium oxide which is obtained by spray-baking a magnesium chloride solution. See, for example, U.S. Patent No. 5,286,28, and European Patent No. EP 04278 number 17. It is also known that the source of Mg such as rust, sea salt or dolomite may be opposite to the source of alkali such as lime or sodium hydroxide. Magnesium hydroxide particles should be formed, and it is also known that Mg salt can be reacted with ammonia to form a crystal of hydroxide. . The industrial application of magnesium hydroxide has been known for some time. Magnesium hydroxide has been used in a variety of applications, from antacid applications in the pharmaceutical industry to flame retardant applications in industrial applications. In the field of flame retardants, magnesium hydroxide is used in synthetic resins (such as plastics) and wire and cable applications to impart flame retardant properties. The composite properties and viscosity of the magnesium hydroxide-containing synthetic resin are important properties related to magnesium hydroxide. In the synthetic resin industry, the requirements for better composite properties and viscosity have increased for obvious reasons, namely higher output during compounding and extrusion, and better flow into the mold. With this increase, the requirements for higher quality magnesium hydroxide particles and their preparation methods have also increased. SUMMARY OF THE INVENTION In one embodiment, the present invention is directed to a method comprising -5 - 200811044 honing and drying a slurry comprising magnesium hydroxide particles, thereby producing honed dry magnesium hydroxide particles; and treating the warp Grinding and drying the magnesium hydroxide particles to coagulate to produce magnesium hydroxide product particles, wherein the slurry contains magnesium hydroxide particles in the range of from about 1 to about 80% by weight based on the total weight of the slurry, and wherein the magnesium hydroxide product particles have about The median pore radius (") in the range of 0.01 to about 0.5 microns. In another embodiment, the invention is directed to a magnesium hydroxide granule having: d5 小于 less than about 3.5 microns; a BET surface area ratio of about 15; and a pore size median in the range of from about 0.01 to about 0.5 microns, wherein the magnesium hydroxide particles are honed and dried in a range from about 1 to about 80% by weight based on the total weight of the slurry. The slurry of magnesium hydroxide is produced by producing honed and dried magnesium hydroxide particles and deagglomerating the honed and dried magnesium hydroxide particles to produce magnesium hydroxide product particles. The method comprises honing and drying a slurry containing magnesium hydroxide in a range of from about 1 to about 80% by weight based on the total weight of the slurry, thus producing honed and dried magnesium hydroxide particles, and then subjecting the honed dry magnesium hydroxide The granules are subjected to deagglomeration treatment, thereby producing the magnesium hydroxide product granules described herein. The syrup useful in the practice of the present invention can be obtained from any of the methods used to make the magnesium hydroxide granules. In an exemplary embodiment, the syrup Derived from a -6-200811044 comprising the addition of water to magnesium oxide, preferably from a spray-baked magnesium chloride solution, to form an aqueous magnesium oxide suspension. The suspension generally comprises, based on the total weight of the suspension, From about 1 to about 85% by weight of magnesium oxide. However, it can vary the magnesium oxide concentration to fall within the range in which the slurry is subjected to honing and drying. The water and magnesium oxide suspension are then included in a temperature range of about 50 ° C. The reaction is carried out under conditions of about 100 ° C with continuous stirring, thus obtaining a mixture or slurry (sometimes referred to as the first slurry) comprising magnesium hydroxide particles and water. Drying, but in a preferred embodiment, the slurry is filtered to remove at least a portion (preferably substantially all) of any impurities dissolved in the water, thus forming a filter cake, and the filter cake is dehydrated, ii a dispersing agent, or iii) any combination thereof, to form a slurry that is subjected to honing and drying (sometimes referred to as a second slurry). It may be washed once with salt water before re-slurrying the filter cake, or The specific embodiment is more than one. When the filter cake is repulped with water, the (second) slurry generally comprises magnesium hydroxide particles in the range of from 1 to about 45 weight percent, based on the total weight of the slurry. In the embodiment, the slurry comprises from about 10 to about 45% by weight, more preferably from about 20 to about 40% by weight, most preferably from about 25 to about 35% by weight, based on the total weight of the slurry. In this embodiment, the remaining slurry is preferably water, more preferably desalinated. If the filter cake is repulped with a dispersant or a combination of dispersant and water, the slurry may contain up to about 80% by weight, based on the total weight of the slurry, of magnesium hydroxide due to the effect of the dispersant. Thus, in this embodiment, the slurry generally comprises magnesium hydroxide particles in the range of from about 1 to about 80 weight percent, based on the total weight of the slurry: preferably the slurry comprises from about 30 to about 75 weight, based on the total weight of the slurry. More preferably, the amount is from about 3 5 to about 70% by weight, most preferably from about 4 5 to about 65 % by weight of the magnesium hydroxide particles. Non-limiting examples of dispersants suitable for use herein include polyacrylates, organic acids, naphthalene sulfonate/formaldehyde condensates, fatty alcohol-polyglycol ethers, polypropylene-ethylene oxide, polyglycol esters, and more. Amine-ethylene oxide, phosphate ester, polyvinyl alcohol. After the filter cake has been repulped, the slurry is honed and dried to produce honed and dried magnesium hydroxide particles. The "mill drying" Φ and "mill dried" as used herein means that the (second) slurry is dried in a turbulent hot air stream of the honing drying unit. The honing drying unit includes a rotor that is rigidly mounted on a solid shaft that rotates at a high peripheral speed. Combined with the rotational movement of the high air output, the hot air flowing through is converted into an extremely fast air whirl, which drives the slurry to be dried, accelerates, and distributes and dries the slurry to produce a larger surface area (as determined by BET above). The magnesium hydroxide particles are dried by honing and then become the starting magnesium hydroxide particles in the slurry. After being completely dried, the honed and dried ATH particles are transported out of the honing machine by turbulent air, and are separated from the hot air and steam using a conventional filter system. After it has completely dried, the magnesium hydroxide particles are transported out of the honing machine via the turbulent air and separated from the hot air and vapor using conventional filter systems. The output of the hot air for the honing slurry is generally greater than about 3,000 Bm3/hr, preferably greater than about 5,000 Bm3/hr, more preferably greater than about 3,000 Bm3/hr to about 40,000 Bm3/hr, and most preferably about 5,000. Bm3 / hour to about 30,000 Bm3 / hour. In order to achieve this high output, the rotor of the honing drying unit typically has a large -8-200811044 at about 40 meters/second, preferably greater than about 60 meters/second, more preferably greater than about 70 meters/second, and most preferably The peripheral speed ranges from about 70 m/sec to about 140 m/sec. The high rotational speed of the rotor and the high hot air output result in a hot air flow with a Reynolds number greater than about 3,000. The temperature of the hot gas stream used to honed the dried slurry is typically greater than about 150 ° C, preferably greater than about 270 ° C. In a more preferred embodiment, the temperature of the hot gas stream is in the range of from about 150 °C to about 550 °C, most preferably in the range of from about 270 °C to about 500 °C. • As described above, the honing of the dried slurry produces honed and dried magnesium hydroxide particles having a large surface area (as determined by BET as described above) and then as the starting magnesium hydroxide particles in the (second) slurry. In general, the BET of the honed dry magnesium hydroxide is greater than about 10% of the magnesium hydroxide particles in the slurry. Preferably, the BET of the honed dry magnesium hydroxide is greater than the range of from about 10% to about 40% of the magnesium hydroxide:particles in the slurry. More preferably, the BET of the honed dry magnesium hydroxide is greater than about 10% to about 25% of the magnesium hydroxide particles in the slurry. The honed dry magnesium hydroxide granules thus produced can be used "directly" for many applications. . In some embodiments, however, it further treats the honed dry magnesium hydroxide particles to reduce, or in some embodiments, the slime present in the honed dry magnesium hydroxide particles. The formation of the cohesive polymer is common in the process of preparing magnesium hydroxide particles, and its presence is detrimental to the performance of the magnesium hydroxide particles in the resin in certain applications. Therefore, magnesium hydroxide manufacturers are highly prone to reduce, preferably to eliminate the binder. In the practice of the present invention, the amount or degree of cohesive presence of the rammed dry magnesium hydroxide particles-9-200811044 is reduced by subjecting the honed dry hydrogen particles to further deagglomeration treatment steps. . De-agglomerating honing dry magnesium hydroxide particles for further processing' wherein the amount of cohesive polymer present in the honed dry hydroxide is substantially eliminated in the specific embodiment or the degree of cohesion (ie present in the honing) The amount of the binder in the dried magnesium particles is greater than the amount of the binder present in the magnesium hydroxide production, and the particles of the honed and dried magnesium hydroxide are extremely small. "Small amount of reduced particle size" means that the magnesium hydroxide product particles (# or equal to 90% of the honed dry magnesium hydroxide particles. The remaining properties of the honed dry particles are debonded from the honed dry ATH particles. The ATH product particles are the same or substantially the same. In a preferred embodiment, the d5 crucible by honing and drying the magnesium hydroxide is in the range of about 90% to about 95% of the dry honing hydrogen hydroxide, more preferably in the honing From about 95% to about 99% of the dried oxyhydroxide particles. Reducing the cohesiveness present in the honed dry magnesium hydroxide particles. Any technique known to effectively reduce the cohesive polymer is known in the art. The deagglomeration is achieved by using an air classifier or mill. In some embodiments, the deagglomeration is performed using one or more pin honing machines, in other embodiments Achieved by a plurality of air sorters. Air sorters suitable for use herein include the use of gravity, out of inertia forces, or any combination thereof to classify magnesium hydroxide product particles using these sorting machines, and are known in the art. The final product of this skill The smaller one can be easily selected to contain appropriate mesh and/or sieve magnesium oxide to show that the particle size of the dried hydroxide in some magnesium particles is reduced by 〖5. More than m ATH is aggregated and the magnesium granulated magnesium particles can be made.佳 销 硏 硏 -10- -10- -10- 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 The use of a pin honing machine is known in the art, and those skilled in the art and familiar with the desired final magnesium hydroxide product particle properties can readily select the best pin honing machine for a particular application. The magnesium hydroxide particles can be characterized as having a BET surface area ratio in the range of from about 1 to about 15 square meters per gram as measured by DIN-66132. In a preferred embodiment, the magnesium hydroxide based particles of the present invention have A BET surface area ratio in the range of from about 1 to about 5 square meters per gram, more preferably from about 2.5 to about 4 square meters per gram. In another preferred embodiment, the magnesium hydroxide product particles have from about 3 to about 7 Square meter / gram range, better for about A BET surface area ratio in the range of 4 to about 6 square meters per gram. In another preferred embodiment, the magnesium hydroxide product particles have a range of from about 6 to about 10 square meters per gram, more preferably from about 7 to about A BET surface area ratio in the range of about 9 square meters per gram. In yet another preferred embodiment, the magnesium hydroxide product particles have a range of from about 8 to about 12 square meters per gram, more preferably from about 9 to about 1 1 level. — BET surface area ratio of the square meter per gram range. The magnesium hydroxide product particles can, and generally are, also characterized as having a d5 小于 of less than about 3.5 microns. In one particular embodiment, the magnesium hydroxide product particles of the present invention are characterized as having about From 1.2 to about 3.5 microns, more preferably from about i. 45 to about d.8 microns. . In another embodiment, the magnesium hydroxide product particles are characterized by having a range of from about 0.9 to about 2,3 microns, more preferably from about 12.5 to about 165 microns. . In another embodiment, the magnesium hydroxide product particles are characterized by having a range of from about 0.5 to about 1.4 microns, more preferably 200811044 is a d5 of the range of from about 0.8 to about 1.1 microns. In yet another embodiment, the magnesium hydroxide product particles are characterized by having a range of from about 0.3 to about 1.3 microns, more preferably from about 0.65 to about 0.95 microns. . It should be noted that the d5〇 measurements in this report were determined using a Malvern Mastersizer S laser diffractometer in accordance with ISO 9276 laser diffraction. For this purpose, a 0.5% solution of EXCRΑΝ ΜA02 from Merck/Germany was used and ultrasonic waves were applied. EXTRΑΝ ΜΑ02 is an additive that reduces the surface tension of water and is used to clean alkali sensitive substances. It contains anionic and non-ionic surfactants, phosphates, and minor amounts of other substances. It uses ultrasonic waves to deagglomerate the particles. The magnesium hydroxide particles can also be characterized as having a specified number of median pore radius ("r5."). The no of the magnesium hydroxide product particles can be obtained from mercury porosimetry. The principle of mercury porosimetry is based on the physical principle that non-reactive, non-wetting liquid does not penetrate the pores until sufficient pressure is applied to force it into. Therefore, the higher the pressure required for the liquid to enter the orifice, the smaller the porosity. It was found that the smaller pore size is related to the better wetting force of the magnesium hydroxide particles. The porosity of the magnesium hydroxide product granules can be calculated from the data obtained from the Orthopores using the Porosimeter 2000 from Carlo Erba Strumentazione. According to the manual of P 〇r 〇simeter 2 0 0 0, the hole radius r is calculated from the measured pressure p using the following equation: r = -2YC〇s(e)/p; where Θ is the wetting angle and γ is the surface tension . The measurement used here uses 14 1.3° and γ is set to 480 dynes/cm. In order to improve the reproducibility of the measurement, it is calculated from the second magnesium hydroxide intrusion test as described in the manual of Porosimeter 2000. The second test was based on the fact that the inventors observed a residual volume of V in the sample of the magnesium hydroxide product particles after extrusion, i.e., after releasing the pressure to ambient pressure -12-200811044. Use the amount of mercury. Thus r5 can be obtained from the information explained with reference to Figures 1, 2 and 3. . In the first test, a sample of the magnesium hydroxide product was prepared as described in the manual of Porosimeter 2000, and a maximum pressure of 2000 bar was used to measure the pore volume as a function of the applied intrusion pressure p. The pressure is released at the end of the first test and the ambient pressure is reached. Perform a second intrusion test using the same sample from the first test (according to the manual of Porosimeter 2000), where the pore volume ratio of the second test is measured by V(p) taking the volume V〇 as the new starting volume, then #对对第二Test it to zero. In the second intrusion test, the maximum pressure of 2000 bar was again used to perform the pore volume ratio V(p) measurement of the sample as a function of the applied intrusion pressure p. Figure 1 shows the second intrusion of the magnesium hydroxide product particle sample for the commercially available magnesium hydroxide grade, the second intrusion test (using the same sample as the first test), the pore volume ratio V as a function of the intrusion pressure applied. Test, using Porosmeter 2000 to calculate the hole radius r according to the formula r = -2ycos(e)/p; its Θ is the wetting angle, γ is the surface tension, and P is the intrusion pressure. For all r measurements used here, 141.3 is used. Then, γ is set to 480 dynes/cm. The pore volume ratio can be expressed as a function of the pore radius r. Figure 2 shows the pore volume ratio V as a function of pore radius r for the second intrusion test (using the same magnesium hydroxide product particle sample from the first test). Figure 3 shows the normalized pore volume of the second intrusion test as a function of the pore radius r, ie in this curve, the maximum pore volume ratio of the second intrusion test is set to 100%, and the other volume ratios are divided by this maximum. value. By definition, here, the radius of the hole at a relative pore volume ratio of 50% is referred to as the median hole radius n〇. For example, according to Figure 3, the median hole radius r5 of commercially available magnesium hydroxide. It is 0.248 microns. The above procedure was repeated using a sample of magnesium hydroxide product particles made in accordance with the present invention, and it was found that the magnesium hydroxide product particles produced in accordance with the present invention have r5 范围 in the range of from about 0.01 to about 0.5 microns. In one embodiment of the invention, the magnesium hydroxide product particles range from about 0.20 to about 0.4 microns, more preferably from about 0.23 to about 0.4 microns, most preferably from about 0.25 # to about 0.35 microns. . In another specific embodiment, r5. It is in the range of from about 0.15 to about 0.25 microns, more preferably in the range of from about 0.16 to about 0.23 microns, most preferably in the range of from about 0.175 to about 0.22 microns. In yet another embodiment, r5〇 is in the range of from about 0.1 to about 0.2 microns, more preferably in the range of from about 0.1 to about 0.16 microns, and most preferably in the range of from about 0.12 to about 0.15 microns. In yet another embodiment, r5 (> is in the range of from about 0.05 to about 0.15 microns, more preferably in the range of from about 0.07 to about 0.13 microns, most preferably in the range of from about 0.1 to about 0.12 microns. ^ In some In a particular embodiment, the magnesium hydroxide product particles produced in accordance with the present invention are further characterized by having a linseed oil absorbing range in the range of from about 15% to about 40%. In a particular embodiment, the magnesium hydroxide product particles produced in accordance with the present invention It may be further characterized as having a linseed oil susceptibility ranging from about 16% to about 25%, more preferably from about 17% to about 25%, most preferably from about 19% to about 24%. In another embodiment The magnesium hydroxide product particles produced in accordance with the present invention may further be characterized as having a range of from about 20% to about 28%, more preferably from about 21% to about 27%, most preferably from about 22% to about 26%, range - 14 - Oil absorption of 200811044. In yet another embodiment, the magnesium hydroxide product particles produced in accordance with the present invention may be further characterized as having a range of from about 24% to about 32%, more preferably from about 25% to about 31% The range is preferably from about 26% to about 30% of the linseed oil absorption. In still another embodiment, the magnesium hydroxide particles produced in accordance with the present invention may be further characterized as having a range of from about 27% to about 34%, more preferably from about 28% to about 33%, most preferably from about 28% to about 32% range of linseed oil absorption. The magnesium hydroxide product particles according to the present invention can be used as a flame retardant in various synthetic resins. Non-limiting examples of thermoplastic resins in which magnesium hydroxide particles can be used include polyethylene and polypropylene. , ethylene-propylene copolymer, polymer and copolymer of C2 to C8 olefin (α-olefin) (such as polybutene, poly(4-methylpentene-1), etc.), copolymer of these olefins and diene , ethylene-acrylate copolymer, polystyrene, ABS resin, AAS resin, AS resin, MBS resin, ethylene-vinyl chloride copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl chloride-vinyl acetate Branch polymer resin, vinylidene chloride, polyvinyl chloride, chlorinated polyethylene, chlorinated polypropylene, vinyl chloride-propylene-ene copolymer, vinyl acetate resin, phenoxy resin, polyacetal, polyamine, poly Yttrium, polycarbonate, polyfluorene Polyphenylene ether, polyphenylene sulfide, polyethylene terephthalate ethyl ester, polybutyl phthalate butyl acrylate, methacrylate, etc. Further examples of suitable synthetic resins include thermosetting resins such as epoxy resins, phenol resins, melamine Resins, unsaturated polyester resins, alkyd resins, and urea resins, and natural or synthetic rubbers such as EPD, butyl rubber, isoprene rubber, SBR, NIR, urethane rubber, poly Butadiene rubber, acrylic rubber, polyoxyxene rubber, also includes fluoroelastomer, NBR, and chlorosulfonated poly-15-200811044 ethylene. It further includes a polymerization suspension (latex). Preferably, the synthetic resin is a polypropylene-based resin, such as a polypropylene homopolymer and an ethylene-propylene copolymer; a polyethylene-based resin such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene. Ultra low density polyethylene, EVA (ethylene vinyl acetate resin), EEA (ethylene-ethyl acrylate resin), EMA (ethylene-methyl acrylate copolymer resin), EAA (ethylene-acrylic copolymer resin), and super High molecular weight polyethylene; and copolymers of C2 to C8 olefins (olefins) such as polybutene and poly(4-methylpentene•-1) 'polyvinyl chloride and rubber. In a more preferred embodiment, the synthetic resin is a polyethylene based resin. The inventors have found that the use of the magnesium hydroxide product particles produced in accordance with the present invention as a flame retardant in synthetic resins achieves a preferred composite property and a preferred viscosity property, i.e., a lower viscosity, of the magnesium hydroxide-containing synthetic resin. A composite of a final extruded or molded article made of a magnesium hydroxide-containing synthetic resin, a manufacturer, etc., requires a much better composite property and a better viscosity. Preferably, the composite property means that the degree of energy variation of the compounding machine (such as Buss Κο-kneader or double screw extruder) required to mix the synthetic resin of the magnesium hydroxide stomach product particles produced according to the present invention is smaller than that of the conventional hydrogen peroxide containing the mixture. A composite machine of synthetic resin of magnesium particles. The smaller the change in energy level, the higher the output of the material to be mixed or extruded and/or the more uniform (homogeneous) the material. The preferred viscosity properties indicate that the synthetic resin containing the magnesium hydroxide product particles produced in accordance with the present invention has a lower viscosity than the synthetic resin containing the conventional magnesium hydroxide particles. This lower viscosity allows for faster extrusion and/or mold filling, lower extrusion or filling of the mold, etc., thus increasing the extrusion speed and/or reducing the mold filling time. Can increase the output. Accordingly, in one embodiment, the present invention is directed to a flame retardant polymer formulation comprising at least one, in some embodiments, only one of the above synthetic resins, and a flame retardant amount of magnesium hydroxide product particles, and Molded and/or extruded articles made from flame retardant polymer formulations. The flame retardant amount of the magnesium hydroxide product particles generally represents from about 5% by weight to about 90% by weight, based on the weight of the flame retardant polymer formulation, and more preferably from about 20% by weight to about the same basis. 70% by weight range. In a preferred embodiment, the amount of flame retardant is from about 30% to about 65% by weight of the magnesium hydroxide product particles on the same basis. The flame retardant polymer formulation may also contain other additives commonly used in the art. Non-limiting examples of other additives suitable for use in the flame retardant polymer formulations of the present invention include extrusion aids such as polyethylene wax, Si as the primary extrusion aid, fatty acids; coupling agents such as amine-, vinyl- Or alkyl decane or maleic acid graft polymer; barium stearate or calcium stearate; organic peroxide; dye; pigment; sputum; foaming agent; deodorant; thermal stabilizer; Oxidizer; ® antistatic agent; strengthening agent; metal scavenger or passivating agent; impact modifier; processing aid; mold release aid, lubricant; anti-blocking agent; other flame retardant; UV stabilizer; plasticizer; Additives, etc. If desired, a nucleating agent such as calcium citrate or indigo may also be included in the flame retardant polymer satire. The ratio of other optional additives is conventional and can be varied to meet any particular condition. The method of incorporation and addition of the components of the flame retardant polymer formulation, and the method of performing the molding are not critical to the invention, and may be known in any art to -17-200811044, as long as the method of selection involves uniform mixing and molding. . For example, a Buss Ko-kneader, an internal mixer, a Farrel continuous mixer, or a twin-screw extruder, or in some cases a single-screw extruder or a two-roll honing machine, may be used to mix the various components and additives. (If used), the flame retardant polymer formulation is then molded in a subsequent processing step. Further, the molded article of the flame retardant polymer formulation can be used after manufacturing applications such as stretching, embossing, coating, printing, plating, perforating, or cutting. The kneaded mixture may also be subjected to inflation molding, injection molding, extrusion molding, blow molding, compression molding, rotary molding, or calender molding. In the case of extruding articles, it is possible to use any extrusion technique known to be effective for the above synthetic resin mixture. In one exemplary technique, the synthetic resin, magnesium hydroxide product particles are combined with optional ingredients (if selected) in a compounding machine to form the flame retardant resin formulation described above. The flame retardant resin formulation is then heated to a molten state in an extruder, and then the molten flame retardant resin formulation is extruded through a selective die to form an extruded article, or coated with a metal wire or glass fiber such as a data transfer. The above description is for a number of specific embodiments of the invention. Those skilled in the art will appreciate that they can be designed to be otherwise effective in the spirit of the present invention. It should also be noted that the preferred embodiments of the present invention are intended to cover all ranges from any lower amount to any higher amount. For example, when discussing the oil absorption of magnesium hydroxide product particles, it is contemplated that ranges from about 15% to about '17%, from about 15% to about 27%, etc., are within the scope of the invention. The following examples describe the invention but are in no way limiting. Example -18- 200811044 η as described in the following examples. It is obtained by permanent porosity using the Porosimeter 2000. Unless otherwise indicated, all ^. , BET, oil absorption, etc. are measured in accordance with the above techniques. EXAMPLES A slurry of 200 liters/hour of magnesium hydroxide and 33% by weight of solids was fed to a dry honing machine. The magnesium hydroxide in the slurry had a BET surface area ratio of 4.5 m 2 /g and a median particle size of 1.5 μm before dry honing. The honing machine is operated under conditions including an air flow rate of 3000-3500 Bm3/small time, a temperature of ® 29 〇 - 320 ° C, and a rotor speed of 100 m / sec. After honing, the honed and dried magnesium hydroxide particles are collected by a hot gas stream through an air filtration system. The product properties of the recovered magnesium hydroxide particles are shown in Table 1 below. Example 2 - Comparative 鲛忡 In this example, the same magnesium hydroxide slurry used in Example 1 was spray dried rather than subjected to honing drying. The product properties of the recovered magnesium hydroxide particles are shown in Table 1 below. Table 1 BET (m2/g) median size cb _ oil absorption (%) median pore radius ("r5.") (μπι) Example 2 - comparative 4.8 1.56 .36.0 0.248 Example 1 - 5.9 in accordance with the present invention 1.38 27.5 0.199 It can be seen in Table 1 that the surface area of magnesium hydroxide (Example 1) according to the present invention is increased by more than 30% compared to the starting magnesium hydroxide particles in the BET slurry. Further, the final magnesium hydroxide particles according to the present invention have an oil absorption lower than that of the conventionally produced magnesium hydroxide particles by about 23.6%. Further, η of the magnesium hydroxide particles according to the present invention. The more conventionally dried magnesium hydroxide particles are small -19-200811044, about 20%, showing excellent wetting characteristics. Example 3 The comparative magnesium hydroxide particles of Example 2 and the magnesium hydroxide particles of Example 1 were separately used to form a flame retardant resin formulation. The synthetic resin used was EVA Escorene® Ultra UL00328 from ExxonMobil, which has LLDPE grade LL1001XV from ExxonMobil, Ethanox® 310 antioxidant commercially available from Albemarle® Corporation, and Dynasylan AMEO from Degussa. Ingredient # In a 46 mm Buss Ko-kneader (L/D ratio = 11), the temperature setting was selected in a general manner well known to those skilled in the art and the screw speed was mixed at an output of 22 kg/hr. The amounts of each component used to formulate the flame retardant resin formulation are detailed in Table 2 below: Table 2 Phr (parts per 100 parts of resin) Escorene Ultra UL00328 80 LL1001XV 20 Magnesium hydroxide 150 AME0 decane 1.6 Ethanox 310 0.6 When burning the resin formulation, first mix AME0 decane and Ethanox® 310 with the total amount of synthetic resin in the barrel before Buss compounding. 50% of the total resin/decane/antioxidant blend and magnesium hydroxide are fed to the first inlet of the Buss kneader due to the loss in the weight feeder, and the remaining 50% of the magnesium hydroxide is fed Feed to the second feed port of the Buss kneader. The discharge extruder is a vertical BUSS-K kneader with a screw size of 70 mm. Figure 4 shows the power diagram of the discharge extruder and the power diagram of the Buss Ko-kneader motor for comparative magnesium hydroxide particles (Example 2), and Figure -20-200811044.5 shows the magnesium hydroxide particles of the present invention ( Example 1). As evidenced by Figures 4 and 5, when the magnesium hydroxide particles according to the present invention are used in a flame retardant resin formulation, the energy (power) variation of the Buss Ko-kneader is significantly reduced, particularly the discharge extruder. As described above, the smaller the variation in the degree of energy, the higher the output and/or the more uniform (homogeneous) the flame retardant resin formulation. Example 3 To determine the mechanical properties of the flame retardant resin formulations produced in Example 2, each flame retardant resin formulation was extruded into a 2 mm thick strip using a Haake Polylab System with a Haake Rheomex extruder. The test rod according to DIN 5 3504 is provided with a punch. The results of this experiment are shown in Table 3 below. Table 3 Comparison Note According to the present invention, the melt flow index @150°C/21.6 kg (g/10 min) 2.8 6.0 Tensile strength (MPa) 11.9 13.2 Breaking elongation (%) 154 189 Resistivity before ice aging (Ohnrcm) 3 ·4χ1014 5.2 xlO14 7d@70°C resistivity after water aging (Ohnrcm) 1.0 xlO14 5.0 xlO14 water absorption (%) 1.01 0.81 As described in Table 3, the flame retardant resin formulation according to the present invention due to relatively uniform coating (i.e., containing magnesium hydroxide particles in accordance with the present invention) has a melt flow index superior to that of a comparative flame retardant resin formulation (i.e., containing magnesium hydroxide particles produced using conventional methods). Further, the tensile strength and elongation at break of the flame retardant resin formulation according to the present invention are superior to those of the comparative flame retardant resin. It should be noted that the melt flow index is measured in accordance with DIN 5 37 35. Tensile strength and elongation at break were measured in accordance with DIN 5 3 504, and the resistivity before and after water aging was measured on a 100 x 1 00 x 2 mm 3 press plate in accordance with DIN 5 3482. The % water absorption is the difference in weight of the initial weight of the board after the aging of the plate at 70 ° C at 70 ° C after 7 days of aging in a saline bath. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows the pore volume ratio V as a function of applied pressure for a commercially available magnesium hydroxide grade, magnesium hydroxide intrusion test. Figure 2 shows the pore volume ratio V as a function of pore radius r for the magnesium hydroxide intrusion test. Figure 3 shows the normalized pore volume ratio for the magnesium hydroxide intrusion test, which is based on setting the maximum pore volume ratio to 100% and dividing the other volume ratios by the maximum enthalpy. Figure 4 shows the power map for the discharge extruder and the power map for the Buss KojM combiner motor for the comparative magnesium hydroxide particles of Example 2. Figure 5 is a graph showing the power map of the discharge extruder and the power map of the Buss Ko-kneader motor for the magnesium hydroxide particles of the present invention of Example 1. [Main component symbol description] Μ 〇 JW\ -22-