2',4',7-trihydroxyflavan | 134992-90-8

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: 2',4',7-trihydroxyflavan
• 英文别名: 4-(7-hydroxy-3,4-dihydro-2H-chromen-2-yl)benzene-1,3-diol
• CAS: 134992-90-8
• 化学式: C₁₅H₁₄O₄
• 分子量: 258.274
• InChiKey: MESKUFUQXGNSBA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  19
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  69.9
• 氢给体数：
  3
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  丁酮 、 间苯二酚 、 间苯二酚 生成 2',4',7-trihydroxyflavan
  参考文献：
  名称：

  MATSUNAGA, KADZUO;TIEDA, TSUTOMU

  摘要：

  DOI：

文献信息

• A rubber composition and a vulcanizing adhesion method using the same
  申请人：SUMITOMO CHEMICAL COMPANY, LIMITED

  公开号：EP0700959A1

  公开（公告）日：1996-03-13

  A rubber composition (1) which comprises:    a rubber (A) such as natural rubber, isoprene rubber and the like;    a hydroxy flavan compound (B1) of the formula (I): wherein R¹, R, R³, R⁴ and R⁵ are hydrogen or an aliphatic group and X and Y are hydrogen, hydroxy or an aliphatic group, such as 2,4,4-trimethyl-2',4',7-trihydroxyflavan (B2); and 2,2,4-trimethyl-1,2-dihydroquinoline polymer (C1) containing 1% or less by weight of a primary amine, 3% or less by weight of the monomer and 30% or more by weight of the dimer based on the total weight of the polymer, or a cromane compound (C2) which may be a novel cromane compound.

  一种橡胶组合物（1），包括：   橡胶（A），例如天然橡胶，异戊二烯橡胶等；   一种羟基黄酮化合物（B1），其化学式为（I）：其中R¹、R、R³、R⁴和R⁵为氢或脂肪基，X和Y为氢、羟基或脂肪基，例如2,4,4-三甲基-2'，4'，7-三羟基黄酮（B2）；以及含有1％或更少的一级胺，3％或更少的单体和30％或更多的二聚体的2,2,4-三甲基-1,2-二氢喹啉聚合物（C1），基于聚合物的总重量，或者是一种可为新型的环己烯化合物（C2）。
• Process for production of branched polycarbonate
  申请人：IDEMITSU PETROCHEMICAL CO., LTD.

  公开号：EP0387714A2

  公开（公告）日：1990-09-19

  The present invention relates to a process for produc­ing branched polycarbonate by an interfacial polycondensation method using an inert organic solvent, an alkaline aqueous solution of divalent phenol, a branching agent, and phosgene, which process is characterized in that as the branching agent, one having a partition coefficient of at least 1 is used, and after separation of the reaction mixture containing a polycarbonate oligomer or polycarbonate and an unreacted branching agent into an organic solvent layer and an aqueous layer, the unreacted branching agent contained in the aqueous layer is extracted with the inert organic solvent and the resulting unreacted branching agent-containing inert organic solvent is returned to the reaction system for reuse. The present invention has advantages of preventing waste water pollution and at the same time, increasing the efficiency of use of the branching agent because it permits to extract and recover the unreacted branching agent contained in waste water with efficiency. The branched polycarbonate obtained by the process by the present invention is good in melt characteristics, is great in dependency on a rate of shear, and is small in draw down. Thus the branched polycarbonate is suitable for extrusion molding.

  本发明涉及一种使用惰性有机溶剂、二价酚的碱性水溶液、支化剂和光气，通过界面缩聚法生产支化聚碳酸酯的工艺，其特征在于，作为支化剂，使用分配系数至少为 1 的支化剂、将含有聚碳酸酯低聚物或聚碳酸酯和未反应的支化剂的反应混合物分离成有机溶剂层和水层后，用惰性有机溶剂萃取水层中未反应的支化剂，并将得到的含有未反应的支化剂的惰性有机溶剂返回反应系统再利用。本发明具有防止废水污染的优点，同时由于可以高效提取和回收废水中未反应的支化剂，提高了支化剂的使用效率。通过本发明的工艺获得的支化聚碳酸酯具有良好的熔融特性，对剪切速率的依赖性大，拉伸小。因此，支化聚碳酸酯适用于挤压成型。
• Branched polycarbonate and process for production thereof
  申请人：IDEMITSU PETROCHEMICAL CO., LTD.

  公开号：EP0411433A2

  公开（公告）日：1991-02-06

  Novel branched polycarbonates having (1) intrinsic viscosity [η], (2) branching parameter G and (3) degree of branching λ in certain ranges are disclosed. Further, novel branched polycarbonates having (4) taking-off parameter A in addition to the above (1) to (3) is in a certain range are, also disclosed. Such novel branched polycarbonates are effective as raw materials for various moldings, particularly blow moldings such as large-sized blow moldings.

  本发明公开了具有(1)固有粘度[η]、(2)支化参数 G 和(3)支化度 λ 在一定范围内的新型支化聚碳酸酯。此外，还公开了除上述(1)至(3)之外，(4)起飞参数 A 在一定范围内的新型支化聚碳酸酯。 此类新型支化聚碳酸酯可有效用作各种模塑的原材料，尤其是吹塑模塑，如大型吹塑模塑。
• PHASE DIFFERENCE COMPENSATION FILM
  申请人：IDEMITSU PETROCHEMICAL CO., LTD.

  公开号：EP0596129A1

  公开（公告）日：1994-05-11

  A polycarbonate phase difference compensation film which can be used for a liquid crystal display, etc., and can reduce a change in retardation resulting from a temperature change in the stretching step by the use of a polycarbonate having a branched structure and a viscosity-average molecular weight of less than 40,000.

  一种聚碳酸酯相位差补偿薄膜，可用于液晶显示器等，通过使用具有支化结构且粘均分子量小于 40,000 的聚碳酸酯，可减少拉伸步骤中温度变化引起的延迟变化。
• A branched polycarbonate and a process for producing the same
  申请人：IDEMITSU PETROCHEMICAL CO. LTD.

  公开号：EP0646613A2

  公开（公告）日：1995-04-05

  A process for producing a branched polycarbonate which comprises using a branching agent containing 200 ppm or less of sulfur; a branched polycarbonate which is prepared by the interfacial method and contains 1.0 ppm or less of residual sulfur as an impurity; and a branched polycarbonate which is prepared by the melting method and contains 2.0 ppm or less of residual sulfur as an impurity; are provided. When the branched polycarbonate is produced by the interfacial method, the branched polycarbonate produced does not show deterioration in heat stability or cause mold corrosion. When the branched polycarbonate is produced by the melting method, the branched polycarbonate produced does not show deterioration in heat stability or in color tone.

  本发明提供了一种生产支化聚碳酸酯的工艺，包括使用含硫量不超过 200ppm 的支化剂；通过界面法制备的支化聚碳酸酯，其杂质残硫含量不超过 1.0ppm；以及通过熔融法制备的支化聚碳酸酯，其杂质残硫含量不超过 2.0ppm。用界面法生产支化聚碳酸酯时，所生产的支化聚碳酸酯的热稳定性不会变差，也不会导致模具腐蚀。用熔融法生产支化聚碳酸酯时，所生产的支化聚碳酸酯的热稳定性和色调不会变差。