一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
010-86108875
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

ChemicalBook CAS DataBase List Methacrylic anhydride
760-93-0

Methacrylic anhydride synthesis

14synthesis methods
2-Methacrylic anhydride is a strong esterifying agent and used as a cross-linking agent in the polymerization reaction for the synthesis of materials such as light-curing coatings and cross-linked resins. Its synthesis method is as follows：Put 1 mol of sodium methacrylate, 3 mol of propionyl chloride and 0.1 mol of a polymerization inhibitor into the reaction kettle, heat it up to 90-100 °C and reflux for 8 hours, and collect the fractions at 100-105 °C after distillation and diversion to obtain 2- Methacrylic anhydride, the product purity is 98.98%,  yield 98.33%.
-

Yield:760-93-0 99%

Reaction Conditions:

with magnesium methacrylate;di-tert-butyl dicarbonate at 25; for 4 h;Reagent/catalyst;

Steps:

7

Examples 213 In each example, methacrylic acid anhydride was produced under conditions the same as in Example 1 except that magnesium carbonate hydroxide as a catalyst was replaced with the type and amount (4 mol % relative to di-t-butyl dicarbonate) of the metal compound shown in Table 1. The reaction results obtained 4 hours after the start of reactions are shown in Table 1.

References:

US2017/88502,2017,A1 Location in patent:Paragraph 0075

Methacrylic anhydride Related Search:

上高县| 克山县| 内乡县| 洪湖市| 凤冈县| 岑溪市| 江都市| 兴城市| 务川| 铜川市| 徐水县| 镶黄旗| 浦北县| 萨嘎县| 同德县| 汉沽区| 宁河县| 朝阳区| 利川市| 永定县| 武宁县| 吉林省| 阜平县| 西乡县| 威远县| 乌恰县| 达尔| 望奎县| 新巴尔虎右旗| 社旗县| 高碑店市| 石柱| 东莞市| 旌德县| 依兰县| 洪雅县| 天气| 长宁区| 临邑县| 吉隆县| 伊金霍洛旗|