2-ethyl-3-methyl-butane-1,4-diol | 66225-34-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-ethyl-3-methyl-butane-1,4-diol
• 英文别名: 2-Aethyl-3-methyl-butan-1,4-diol；2-Methyl-3-hydroxymethyl-pentanol-(1)；2.3-Bis-hydroxymethyl-pentan；2-Ethyl-3-methylbutane-1,4-diol
• CAS: 66225-34-1
• 化学式: C₇H₁₆O₂
• 分子量: 132.203
• InChiKey: IFPWAVCXUHSXDW-UHFFFAOYSA-N

物化性质

• 沸点：
  141-143 °C(Press: 14 Torr)
• 密度：
  0.945±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  9
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-ethyl-3-methyl-butane-1,4-diol 在 氢溴酸 作用下， 生成 1-bromo-3-bromomethyl-2-methyl-pentane
  参考文献：
  名称：

  v.Braun; Keller; Weissbach, Justus Liebigs Annalen der Chemie, 1931, vol. 490, p. 187

  摘要：

  DOI：
• 作为产物：
  描述：

  乙基甲基丁二酸 在 lithium aluminium tetrahydride 、 乙醚 作用下， 生成 2-ethyl-3-methyl-butane-1,4-diol
  参考文献：
  名称：

  The Synthesis and Polymerization of Some 2-Methyl-3-alkyl-1,3-butadienes¹

  摘要：

  DOI：

  10.1021/ja01126a046

文献信息

• KEYPAD MADE FROM THERMOPLASTIC POLYURETHANE RESIN AND METHOD FOR FORMING THEREOF
  申请人：Nippon Polyurethane Industry Co., Ltd.

  公开号：EP1632514A1

  公开（公告）日：2006-03-08

  A keypad of TPU obtained from a TPU sheet by thermoforming, wherein said TPU sheet is a melt-formed product of resin pellets resulting from reaction between an organic diisocyanate (A) composed mainly of hexamethylenediisocyanate (A1), a high-molecular weight polyol (B) composed mainly of polycarbonate diol (B1), and a chain extender (C) composed mainly of an aliphatic diol (C1) having 2 to 10 carbons. The TPU used in the present invention excels in secondary formability, oleic acid resistance, discoloration resistance, clarity, and printability.

  一种通过热成型从热塑性聚氨酯片材获得的热塑性聚氨酯按键，其中所述热塑性聚氨酯片材是由主要由六亚甲基二异氰酸酯（A1）组成的有机二异氰酸酯（A）、主要由聚碳酸酯二元醇（B1）组成的高分子量多元醇（B）和主要由具有 2 至 10 个碳原子的脂肪族二元醇（C1）组成的扩链剂（C）反应生成的树脂颗粒的熔融成型产品。本发明中使用的热塑性聚氨酯在二次成型性、耐油酸性、耐褪色性、透明度和可印刷性方面表现出色。
• PROCESS FOR PRODUCING POLYURETHANE EMULSION FOR WATER-BASED ONE-PACK TYPE COATING MATERIAL
  申请人：Nippon Polyurethane Industry Co., Ltd.

  公开号：EP1721947A1

  公开（公告）日：2006-11-15

  [PROBLEMS] The invention is to provide an aqueous one-component coating agent that is environmentally friendly and safe, and is excellent in productivity and storage stability, and also in alkali resistance and solvent resistance of a coated film. [MEANS FOR SOLVING PROBLEMS] The problems are solved by providing a method for producing polyurethane emulsion for an aqueous one-component coating agent, comprising: reacting an organic diisocyanate (a1), a high molecular weight polyol (a2) and a low molecular weight glycol containing a carboxyl group (a3) to produce an isocyanate-terminated urethane prepolymer having a carboxyl group (A); mixing the urethane prepolymer (A) with a polyisocyanate containing a nonionic polar group (B); neutralizing the carboxyl group in the system with a neutralizing agent (C); and subjecting the mixture to emulsification in water and chain extension with water or an amine.

  [问题] 本发明旨在提供一种单组分水性涂布剂，该涂布剂环保、安全、生产效率高、储 存稳定性好、涂膜耐碱性和耐溶剂性好。 [解决问题的方法] 为了解决上述问题，我们提供了一种生产单组分水性涂料用聚氨酯乳液的方法，该方法包括： 1：使有机二异氰酸酯（a1）、高分子量多元醇（a2）和含有羧基的低分子量乙二醇 （a3）反应，生成具有羧基（A）的异氰酸酯封端聚氨酯预聚物；将聚氨酯预聚物 (A) 与含有非离子极性基团的多异氰酸酯 (B) 混合；用中和剂 (C) 中和体系中的羧基；以及将混合物在水中乳化，并用水或胺进行扩链。
• Process for preparing solvent-free aqueous polyurethane dispersion
  申请人：NAN YA PLASTICS CORPORATION

  公开号：US10676562B2

  公开（公告）日：2020-06-09

  A process for preparing solvent-free aqueous polyurethane dispersion modified with acrylic grafting is divided into four steps. The first step is a reaction of a diisocyanate with a polyol to prepare a prepolymer; the second step involves diluting the prepolymer with an acrylate monomer and adding a sulfonate-based chain extender to react; the third step involves adding deionized water and a water-soluble diamine-based chain extender to obtain a solvent-free sulfonate-based aqueous polyurethane dispersion; and the fourth step involves letting the aqueous polyurethane become modified with acrylic grafting. The resulting aqueous polyurethane has excellent mechanical strength, heat resistance and water resistance.

  制备丙烯酸接枝改性无溶剂水性聚氨酯分散体的工艺分为四个步骤。第一步是二异氰酸酯与多元醇反应制备预聚物；第二步是将预聚物与丙烯酸酯单体稀释，并加入磺酸盐基扩链剂进行反应；第三步是加入去离子水和水溶性二胺基扩链剂，得到无溶剂磺酸盐基水性聚氨酯分散体；第四步是让水性聚氨酯进行丙烯酸接枝改性。由此得到的水性聚氨酯具有优异的机械强度、耐热性和耐水性。
• High heat resistant and high scratch resistant water-based polyurethane and manufacturing method thereof
  申请人：NAN YA PLASTICS CORPORATION

  公开号：US11053336B2

  公开（公告）日：2021-07-06

  A method for manufacturing high heat resistant and high scratch resistant water-based polyurethane, which can improve the mechanical strength and water resistance of water-based polyurethane by using acrylate graft modification, is provided. In particular, 2-hydroxyethyl acrylate (2-HEA), methyl methacrylate (MMA), ethyl acrylate (EA), acrylic acid (AA), glycidyl methacrylate (GMA) and triallyl isocyanuric acid ester (TAIC) are used to dilute polyurethane prepolymer. As a result, the prepolymer has a good dispersing effect, and further, waterborne bridging agent and cellulose nanofiber are added to the water-based polyurethane to obtain water-based polyurethane which has high heat resistance and scratch resistance.

  本发明提供了一种制造高耐热性和高耐刮伤性水性聚氨酯的方法，该方法通过丙烯酸酯接枝改性可提高水性聚氨酯的机械强度和耐水性。其中，2-羟乙基丙烯酸酯（2-HEA）、甲基丙烯酸甲酯（MMA）、丙烯酸乙酯（EA）、丙烯酸（AA）、甲基丙烯酸缩水甘油酯（GMA）和异氰尿酸三烯丙基酯（TAIC）被用于稀释聚氨酯预聚物。因此，预聚物具有良好的分散效果，然后在水性聚氨酯中加入水性架桥剂和纳米纤维素纤维，从而得到具有高耐热性和抗划伤性的水性聚氨酯。
• Method for preparing aqueous polyurethane dispersion
  申请人：NAN YA PLASTICS CORPORATION

  公开号：US11254780B2

  公开（公告）日：2022-02-22

  A method for preparing an aqueous polyurethane dispersion includes the following steps. The method characterized in that it introduces an ethoxy group to sodium ethylenediamine sulfonate (H2N—CH2CH2NHCH2CH2SO3Na) serving as an anionic chain extender to form sodium ethylenediamino ethoxyethyl sulfonate (H2NCH2CH2NHCH2CH2OCH2CH2SO3Na). Next, hydrophilic groups of sodium ethylenediamino ethoxyethyl sulfonate are used to prepare an aqueous polyurethane to improve the flowability of the resin, in which the polyurethane prepolymer has an isocyanate group at its end. More than one acrylate monomer is used for dilution and reduction of viscosity, and hydrophilic and amine groups containing sulfonate is used for water dispersion and to carry out a chain extension reaction. After that, an initiator is added for acrylic polymerization, so as to modify polyurethane with graft acrylic.

  一种制备聚氨酯水性分散体的方法包括以下步骤。该方法的特点是在作为阴离子扩链剂的乙二胺磺酸钠（H2N-CH2CH2NHCH2CH2SO3Na）中引入乙氧基，形成乙二胺乙氧基乙基磺酸钠（H2NCH2CH2NHCH2CH2OCH2CH2SO3Na）。接着，用乙二胺乙氧基乙基磺酸钠的亲水基团制备水性聚氨酯，以改善树脂的流动性，其中聚氨酯预聚物的末端带有异氰酸酯基团。使用一种以上的丙烯酸酯单体来稀释和降低粘度，使用含磺酸盐的亲水基团和胺基团来进行水分散和链延伸反应。然后加入引发剂进行丙烯酸聚合，从而用接枝丙烯酸对聚氨酯进行改性。