| 第 52 卷第 2 期 |  | Vol. 52 No. 2 | | 2022 年 4 月 | Apr 2022 |
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所屬欄目：農藥及中間體
20%甲基嘧啶磷·高效氯氟氰菊酯微囊懸浮劑的制備 |
| 李 敏1，2，劉 偉1，2，吳 曼1，2，王勝得1，2，曾雪云1，2，陳 燦1，2
（1.湖南化工研究院有限公司 國家農藥創(chuàng )制工程技術(shù)研究中心，湖南 長(cháng)沙 410014；2.農用化學(xué)品湖南省重點(diǎn)實(shí)驗室，湖南 長(cháng)沙 410014） |
| 摘 要：采用界面聚合法制備20%甲基嘧啶磷·高效氯氟氰菊酯微囊懸浮劑，篩選了乳化劑、分散劑及其他助劑，考察了芯壁比、乳化速度、固化溫度等因素對微膠囊穩定性的影響，確定了20%甲基嘧啶磷·高效氯氟氰菊酯微囊懸浮劑的配方及其制備工藝條件：甲基嘧啶磷和高效氯氟氰菊酯溶解在有機溶劑中，以PM-200為囊材，芯壁比10∶1、10%乳化劑EL-20、2%分散劑SP-2700。高速攪拌乳化速度800 r/min，緩慢升溫35 ℃ 1 h、45 ℃ 1 h、55 ℃ 2 h進(jìn)行固化。固化結束后降低至室溫，加入增稠劑、防凍劑，得到所需的微囊懸浮劑。該制劑性能指標檢測合格，包覆率高，且微膠囊形態(tài)好，化學(xué)結構穩定，界面聚合工藝操作簡(jiǎn)便，條件溫和，適合工業(yè)化生產(chǎn)。 |
| 關(guān)鍵詞：甲基嘧啶磷；高效氯氟氰菊酯；微囊懸浮劑；界面聚合 |
| 中圖分類(lèi)號：S482.3 文獻標識碼：A 文章編號：1009-9212（2022）02-0008-05 |
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| Preparation of 20% Pirimiphos-methyl·λ-cyhalothrin Microcapsule Suspension |
| LI Min1,2, LIU Wei1,2, WU Man1,2, WANG Sheng-de1,2, ZENG Xue-yun1,2, CHEN Can1,2
(1. National Engineering Research Center for Agrochemicals, Hunan Research Institute of Chemical Industry Co.,Ltd., Changsha 410014, China; 2. Hunan Province Key Laboratory for Agrochemicals, Changsha 410014, China) |
| Abstract：20% Pirimiphos-methyl·λ-cyhalothrin microcapsule suspension was prepared by the interfacial polymerization method. The effects of emulsifiers, disperser and other additives, core-wall ratio, high speed emulsification and curing temperature on the formation of microcapsule were studied. The preparation conditions were obtained as following: cyclohexanone and solvent oil PM-200 were selected as solvents, the dosage of emulsifier EL-20 was 10% and the dosage of dispersant SP-2700 was 2%. The emulsification stirring speed was 800 r/min, slowly heated up at 35 ℃ for 1 h, 45 ℃ 1 h and 55 ℃ 2 h for curing. Then thickening agent and antifreezing agent were added for the preparation of the CS. The results of the formulation physical-chemical properties tests showed that all indexs of CS met the standards of CS. The entire processing conditions of interfacial polymerization are simple, mild, fast, and suitable for industry. |
| Key words：pirimiphos-methyl; λ-cyhalothrin; microcapsule suspension; interfacial polymerization |
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作者簡(jiǎn)介：李 敏（1987—），女，山東濱州人，助理研究員，碩士，研究方向：農藥制劑加工技術(shù)研究（E-mail：limin_1011@163.com）。
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收稿日期：2022-03-01
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