2,7-dimethyl-octane-1,8-diol | 102878-46-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: 2,7-dimethyl-octane-1,8-diol
• 英文别名: 2,7-Dimethyl-octan-1,8-diol；2,7-Dimethyloctane-1,8-diol
• CAS: 102878-46-6
• 化学式: C₁₀H₂₂O₂
• 分子量: 174.283
• InChiKey: HDMPSPHLMYRMKD-UHFFFAOYSA-N

物化性质

• 沸点：
  65-70 °C(Press: 0.05 Torr)
• 密度：
  0.920±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  12
• 可旋转键数：
  7
• 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：

  2,7-dimethyl-octane-1,8-diol 生成 1,8-bis-(3,5-dinitro-benzoyloxy)-2,7-dimethyl-octane
  参考文献：
  名称：

  Deemer; Lutwak; Strong, Journal of the American Chemical Society, 1948, vol. 70, p. 156

  摘要：

  DOI：
• 作为产物：
  描述：

  2,7-二甲基辛二酸 在 lithium aluminium tetrahydride 、 乙醚 作用下， 生成 2,7-dimethyl-octane-1,8-diol
  参考文献：
  名称：

  Buchta; Schlesinger, Justus Liebigs Annalen der Chemie, 1956, vol. 598, p. 1,24

  摘要：

  DOI：

文献信息

• Highly efficient NHC-iridium-catalyzed β-methylation of alcohols with methanol at low catalyst loadings
  作者：Zeye Lu、Qingshu Zheng、Guangkuo Zeng、Yunyan Kuang、James H. Clark、Tao Tu

  DOI：10.1007/s11426-021-1017-0

  日期：2021.8

  and secondary alcohols with methanol has been achieved by using bis-N-heterocyclic carbene iridium (bis-NHC-Ir) complexes. Broad substrate scope and up to quantitative yields were achieved at low catalyst loadings with only hydrogen and water as by-products. The protocol was readily extended to the β-alkylation of alcohols with several primary alcohols. Control experiments, along with DFT calculations

  醇的甲基化非常重要，因为大量的生物活性和药用醇都含有甲基。在这里，通过使用双-N-杂环卡宾铱（双-NHC-Ir）配合物实现了伯醇和仲醇与甲醇的高效β-甲基化。在仅氢和水作为副产物的低催化剂负载下实现了广泛的底物范围和高达定量的产率。该协议很容易扩展到β- 醇与几种伯醇的烷基化。对照实验以及 DFT 计算和晶体学研究表明，配体效应对其优异的催化性能至关重要，为与简单醇进行更具挑战性的格尔伯特反应提供了线索。
• Thermoplastic polyurethanes, elastic fibers therefrom, and method for producing the fibers
  申请人：Kuraray Co., Ltd.

  公开号：EP0974608A1

  公开（公告）日：2000-01-26

  The invention relates to thermoplastic polyurethanes obtainable by reacting a polyol composition (A) which consists essentially of a polyester-polyol (A-1) having a crystallization enthalpy of at most 70 J/g and a number-average molecular weight of from 1000 to 5000 and a polyether-polyol (A-2) having a number-average molecular weight of from 500 to 2500, and in which the average number, f, of the functional hydroxyl groups existing therein falls between 2.006 and 2.100, an organic diisocyanate (B), and a chain extender (C), at a ratio that satisfies the following formula:1.00 ≤ b/(a+c) ≤ 1.10 wherein a indicates the number of moles of all polyols constituting the polyol composition (A), b indicates the number of moles of the organic diisocyanate (B), and c indicates the number of moles of the chain extender (C); to elastic fibers comprising them; and to a method for producing polyurethane elastic fibers by melt-spinning the thermoplastic polyurethane. The thermoplastic polyurethanes and the polyurethane elastic fibers comprising them have good properties of spinning stability, heat resistance, hot water resistance, elastic recovery, elongation and homogeneousness of fiber.

  本发明涉及一种多元醇组合物（A），它主要由结晶焓至多为 70 焦耳/克、数均分子量为 1000 至 5000 的聚酯多元醇（A-1）和数均分子量为 500 至 2500 的聚醚多元醇（A-2）（其中存在的官能羟基的平均数目 f 在 2.006 至 2.100 之间）、有机二异氰酸酯（B）和扩链剂（C）反应而得的热塑性聚氨酯。100、有机二异氰酸酯 (B) 和扩链剂 (C)，其比例满足下式：1.00 ≤ b/(a+c) ≤ 1.10 其中，a 表示构成多元醇组合物 (A) 的所有多元醇的摩尔数，b 表示有机二异氰酸酯 (B) 的摩尔数，c 表示扩链剂 (C) 的摩尔数。热塑性聚氨酯和由其组成的聚氨酯弹性纤维具有良好的纺丝稳定性、耐热性、耐热水性、弹性恢复、伸长率和纤维均匀性。
• Process for producing a leather-like sheet
  申请人：Kuraray Co., Ltd.

  公开号：EP1041191A2

  公开（公告）日：2000-10-04

  A fibrous substrate, in particular a fibrous substrate comprising a microfine fiber-forming fiber is impregnated with a composite resin emulsion obtained by emulsion-polymerizing an ethylenically unsaturated monomer (B) in the presence of a polyurethane-based emulsion (A) at a weight ratio of the (A) / the (B) of 90/10 to 10/90, the emulsion having heat-sensible gelatinizing ability making it possible to supply a film having a specific elastic modulus. Subsequently, the emulsion is gelatinized. In the case that the fibrous substrate is a microfine fiber-forming fiber, this fiber is converted into a microfine fiber bundle. In this way, a leather-like sheet is produced. This process makes it possible to obtain a leather-like sheet having excellent softness and fulfillment feeling, and good hand touch, feel and physical properties like natural leather. In the case that the fibrous substrate particularly comprises a microfine fiber, it is possible to obtain a leather-like sheet having the above-mentioned characteristics and suede-like high-quality.

  一种纤维基材，特别是一种由微细纤维成型纤维组成的纤维基材，被浸渍在一种复合树脂乳液中，该乳液是在聚氨酯基乳液（A）存在下，通过乳液聚合乙烯基不饱和单体（B）而获得的，(A)/(B)的重量比为 90/10 至 10/90，该乳液具有热感应胶化能力，可以提供具有特定弹性模量的薄膜。随后，乳液被凝胶化。如果纤维基质是微细纤维成型纤维，则将其转化为微细纤维束。通过这种方式，就能生产出类似皮革的薄片。通过这种工艺，可以获得具有极佳的柔软性和舒适感，以及良好的手感、触感和物理特性的仿皮革片材，如同天然皮革一样。如果纤维基材特别包括微细纤维，则有可能获得具有上述特性和麂皮质感的仿皮片材。
• Thermoplastic polyurethane composition and process for producing the same
  申请人：KURARAY CO., LTD.

  公开号：EP1331247A1

  公开（公告）日：2003-07-30

  The present invention provides a thermoplastic polyurethane composition which comprises an ethylene-vinyl alcohol copolymer and/or a polyamide, and a thermoplastic polyurethane, in which the retention of melt tension thereof, when kept in a molten state at 220 °C for 1 hour, determined by the following equation (1), is not less than 10 %.Retention of melt tension (%) = [Melt tension after being kept in a molten state/Melt tension before being kept in a molten state] × 100 The thermoplastic polyurethane composition of the present invention is excellent in production stability of a molded article, and can provide a molded article excellent in appearance because the progress of gelation thereof is suppressed even in a molten state.

  本发明提供了一种热塑性聚氨酯组合物，该组合物包括乙烯-乙烯醇共聚物和/或聚酰胺，以及一种热塑性聚氨酯，其中，当其在 220 °C 的熔融状态下保持 1 小时时，由下式（1）确定的熔体张力保持率不小于 10%.熔体张力保持率（%）=[保持熔融状态后的熔体张力/保持熔融状态前的熔体张力] ×100%。× 100 本发明的热塑性聚氨酯组合物在模塑制品的生产稳定性方面表现出色，并且由于即使在熔融状态下也能抑制凝胶化进程，因此能提供外观优异的模塑制品。
• VINYL CHLORIDE POLYMER COMPOSITION
  申请人：Kuraray Co., Ltd.

  公开号：EP1411083A1

  公开（公告）日：2004-04-21

  The present invention provides a vinyl chloride polymer composition which comprises (i) a vinyl chloride polymer (a) and (ii) a block copolymer (b) having a polymer block (I) comprising of a block copolymer, which may be hydrogenated, of an aromatic vinyl compound polymer block and a conjugated diene polymer block, and a polymer block (II) of a polyurethane, in a specific weight ratio. The vinyl chloride polymer composition of the present invention has non-tackiness, excellent handling properties, favorable flexibility and mechanical properties, and favorable melt-adhesiveness to other materials, and shows no migration of the component serving as a plasticizer. The vinyl chloride polymer composition of the present invention can be applied for various uses such as a production of various molded articles and a production of a laminated structure with other materials.

  本发明提供了一种氯乙烯聚合物组合物，它包括(i)氯乙烯聚合物(a)和(ii)嵌段共聚物(b)，嵌段共聚物(b)的聚合物嵌段(I)包括芳香族乙烯基化合物聚合物嵌段和共轭二烯聚合物嵌段的嵌段共聚物（可氢化），以及聚氨酯聚合物嵌段(II)，两者的重量比为特定比例。本发明的氯乙烯聚合物组合物具有无粘性、优异的操作性能、良好的柔韧性和机械性能，以及与其他材料良好的熔融粘附性，而且作为增塑剂的成分不会发生迁移。本发明的氯乙烯聚合物组合物可用于各种用途，如生产各种模塑制品和与其他材料的层压结构。