2-methylene-4, 5-dimethyl-1, 3-dioxolane | 105649-53-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧戊环
• 英文名称: 2-methylene-4, 5-dimethyl-1, 3-dioxolane
• 英文别名: 2-methylene-4,5-dimethyl-1,3-dioxolane；4,5-Dimethyl-2-methylidene-1,3-dioxolane
• CAS: 105649-53-4
• 化学式: C₆H₁₀O₂
• 分子量: 114.144
• InChiKey: SZKDYOBUWOBTDV-UHFFFAOYSA-N

物化性质

• 沸点：
  145.9±20.0 °C(Predicted)
• 密度：
  0.96±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  甲醇 、 2-methylene-4, 5-dimethyl-1, 3-dioxolane 反应 1.0h， 以98%的产率得到2-methoxy-2,4,5-trimethyl-[1,3]dioxolane
  参考文献：
  名称：

  环烯酮缩醛与甲醇反应中反应速率与NMR化学位移之间的关系

  摘要：

  环状烯酮缩醛与甲醇的反应以相当好的收率得到了相应的环状原乙酸酯。通过动力学研究获得了它们的反应速率与不饱和亚甲基的1 H或13 C NMR化学位移之间的线性关系。

  DOI：

  10.1016/s0040-4039(00)84321-x
• 作为产物：
  描述：

  2-氯乙醛缩二甲醇 、 2,3-丁二醇 在 potassium tert-butylate 作用下， 以78%的产率得到2-methylene-4, 5-dimethyl-1, 3-dioxolane
  参考文献：
  名称：

  环烯酮缩醛与甲醇反应中反应速率与NMR化学位移之间的关系

  摘要：

  环状烯酮缩醛与甲醇的反应以相当好的收率得到了相应的环状原乙酸酯。通过动力学研究获得了它们的反应速率与不饱和亚甲基的1 H或13 C NMR化学位移之间的线性关系。

  DOI：

  10.1016/s0040-4039(00)84321-x

文献信息

• COPOLYMER, AND MOLDED ARTICLE
  申请人：Kuraray Co., Ltd.

  公开号：EP3095800A1

  公开（公告）日：2016-11-23

  Provided are a break-resistant copolymer having high transparency and heat resistance and also having a high tensile strain at break, and a molded article. A copolymer contains 80% by mass to 98% by mass of structural units derived from a methacrylic ester monomer and 2% to 10% by mass of ester structural units derived from a cyclic ketene acetal monomer. The copolymer has a weight average molecular weight of 80, 000 or more and a molecular weight distribution of 1. 75 to 3.80.

  本发明提供了一种具有高透明度和耐热性，同时具有高断裂拉伸应变的抗断裂共聚物，以及一种模塑制品。 一种共聚物含有 80%-98%（质量百分比）由甲基丙烯酸酯单体衍生的结构单元和 2%-10%（质量百分比）由环烯酮缩醛单体衍生的酯结构单元。共聚物的平均分子量为 80,000 或以上，分子量分布为 1.75 至 3.80。
• Copolymer, and molded article
  申请人：KURARAY CO., LTD.

  公开号：US10287380B2

  公开（公告）日：2019-05-14

  Provided are a break-resistant copolymer having high transparency and heat resistance and also having a high tensile strain at break, and a molded article. A copolymer contains 80% by mass to 98% by mass of structural units derived from a methacrylic ester monomer and 2% to 10% by mass of ester structural units derived from a cyclic ketene acetal monomer. The copolymer has a weight average molecular weight of 80,000 or more and a molecular weight distribution of 1.75 to 3.80.

  本发明提供了一种具有高透明度和耐热性，同时具有高断裂拉伸应变的抗断裂共聚物，以及一种模塑制品。 一种共聚物含有 80%-98%（质量百分比）由甲基丙烯酸酯单体衍生的结构单元和 2%-10%（质量百分比）由环烯酮缩醛单体衍生的酯结构单元。共聚物的平均分子量为 80,000 或以上，分子量分布为 1.75 至 3.80。
• Aqueous dispersion of copolymer particles of vinyl acetate and a cyclic ketene acetal monomer
  申请人：Rohm and Haas Company

  公开号：US11111328B2

  公开（公告）日：2021-09-07

  The present invention relates to a composition comprising an aqueous dispersion of copolymer particles comprising structural units of vinyl acetate, a cyclic ketene acetal monomer, and a monoethylenically unsaturated acid monomer, or a salt thereof; wherein the cyclic ketene acetal monomer is characterized by following structure: where n and the R groups are as defined herein. The composition of the present invention provides a water-borne dispersion that is substantially free of volatile organic solvents and that provides a readily degradable polymer that is useful, for example, in the manufacture of biodegradable packaging products.

  本发明涉及一种包含共聚物颗粒水分散液的组合物，共聚物颗粒包含乙酸乙烯酯、环酮缩醛单体和单乙烯基不饱和酸单体或其盐的结构单元；其中环酮缩醛单体的结构特征如下： 其中 n 和 R 基团如本文所定义。本发明的组合物提供了一种基本上不含挥发性有机溶剂的水性分散体，并提供了一种易于降解的聚合物，可用于制造可生物降解的包装产品等。
• Preparation of an aqueous dispersion of copolymer particles of vinyl acetate and a cyclic ketene acetal monomer
  申请人：Rohm and Haas Company

  公开号：US11111329B2

  公开（公告）日：2021-09-07

  The present invention relates to a method comprising the steps of a) contacting under emulsion polymerization conditions vinyl acetate; a cyclic ketene acetal monomer; and a monoethylenically unsaturated acid monomer or a salt thereof; to form an aqueous dispersion of copolymer particles comprising structural units of vinyl acetate, the cyclic ketene acetal, and the monoethylenically unsaturated acid monomer or a salt thereof; wherein the cyclic ketene acetal monomer is characterized by following structure: where n and the R groups are as defined herein. The method of the present invention provides a water-borne dispersion that is substantially free of volatile organic solvents and that provides a readily degradable polymer that is useful, for example, in the manufacture of biodegradable packaging products.

  本发明涉及一种方法，包括以下步骤 a) 在乳液聚合条件下，将乙酸乙烯酯、环己酮缩醛单体和单乙烯基不饱和酸单体或其盐接触，形成共聚物颗粒的水分散液，共聚物颗粒由乙酸乙烯酯、环己酮缩醛和单乙烯基不饱和酸单体或其盐的结构单元组成；其中环己酮缩醛单体的结构特征如下： 其中 n 和 R 基团如本文所定义。本发明的方法提供了一种基本上不含挥发性有机溶剂的水性分散体，该分散体提供了一种易于降解的聚合物，可用于制造可生物降解的包装产品等。
• COMPOSITE HOLLOW FIBER MEMBRANES FOR JET FUEL DE-OXYGENATION
  申请人：AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLC

  公开号：US20200197834A1

  公开（公告）日：2020-06-25

  A liquid hydrocarbon fuel containing dissolved oxygen is at least partially deoxygenated with a membrane device comprising a composite hollow fiber membrane that is comprised of an ultra-thin amorphous fluoropolymer layer superimposed on a porous PEEK polymer substrate.