Di-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)n-butylmalonate | 123772-26-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 哌啶类
• 英文名称: Di-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)n-butylmalonate
• 英文别名: bis(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl) n-butylmalonate；Bis(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl) 2-butylpropanedioate
• CAS: 123772-26-9
• 化学式: C₂₅H₄₆N₂O₆
• 分子量: 470.65
• InChiKey: KRRWGJFRYFSLFQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  33
• 可旋转键数：
  9
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  99.5
• 氢给体数：
  2
• 氢受体数：
  8

文献信息

• CONTINUOUS PROCESS FOR PREPARING (METH)ACRYLATES OF C10- ALCOHOL MIXTURES
  申请人：BASF SE

  公开号：US20140135523A1

  公开（公告）日：2014-05-15

  A continuous process for preparing (meth)acrylates of C 10 -alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C 10 -alcohols composed of 2-propylheptanol as the main isomer and at least one of the C 10 -alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.

  通过将冰冷的（甲基）丙烯酸与由2-丙基庚醇异构体混合物反应制备C10-醇混合物的（甲基）丙烯酸酯的连续过程，其中以2-丙基庚醇为主要异构体，至少包括以下C10-醇之一：2-丙基-4-甲基己醇，2-丙基-5-甲基己醇，2-异丙基庚醇，2-异丙基-4-甲基己醇，2-异丙基-5-甲基己醇和/或2-丙基-4,4-二甲基戊醇，并在这种过程中使用已与含N-氧基的化合物酯化的二羧酸二酯作为聚合抑制剂。
• COMPOUNDS AND LIQUID-CRYSTALLINE MEDIUM
  申请人：MERCK PATENT GMBH

  公开号：US20180216005A1

  公开（公告）日：2018-08-02

  Compounds of the formula I, and liquid-crystalline media, preferably having a nematic phase and negative dielectric anisotropy, comprising a) one or more compounds of the formula I and one or more compounds selected from b) one or more compounds of formula II and/or c) one or more compounds selected from compounds of formulae III-1 to III-4 and formula B Methods for making and using these liquid-crystalline media in electro-optical displays, particularly in active-matrix displays based on the VA, ECB, PALC, FFS or IPS effect and the displays which contain these media. Methods for stabilizing liquid-crystalline media with compounds of formula I, where the liquid-crystalline media comprise one or more compounds of the formula II and one or more compounds selected from compounds of the formulae III-1 to III-4 and formula B.

  公式I的化合物和液晶介质，最好具有向列相和负介电各向异性，包括a) 一个或多个公式I的化合物和一个或多个选自b) 一个或多个公式II的化合物和/或c) 一个或多个选自公式III-1至III-4和公式B的化合物的液晶介质的方法。制备和使用这些液晶介质的方法在电光显示中，特别是基于VA、ECB、PALC、FFS或IPS效应的主动矩阵显示和包含这些介质的显示器。一种使用公式I的化合物稳定液晶介质的方法，其中液晶介质包括一个或多个公式II的化合物和一个或多个选自公式III-1至III-4和公式B的化合物。
• [EN] QUINONE METHIDE AND AMMONIUM SALT ANTIPOLYMERANT COMPOSITION AND METHOD<br/>[FR] COMPOSITION D'ANTI-POLYMÈRE DE MÉTHIDE DE QUINONE ET DE SEL D'AMMONIUM, ET PROCÉDÉ
  申请人：ECOLAB USA INC

  公开号：WO2021072181A1

  公开（公告）日：2021-04-15

  Described are compositions and methods for inhibiting polymerization of a monomer (e.g., styrene) composition a quinone methide polymerization retarder and an ammonium salt. In a mixture, the ammonium salt improves the efficacy of the quinone methide polymerization retarder and provides greater antipolymerant activity. In turn, the mixture reduces or prevents apparatus fouling and improves the purity of monomer streams.

  本文描述了一种抑制单体（例如苯乙烯）聚合的组合物和方法，该组合物包括醌甲醛聚合抑制剂和铵盐。在混合物中，铵盐提高了醌甲醛聚合抑制剂的功效，并提供了更强的抗聚合活性。反过来，该混合物减少或预防设备污染，并提高单体流的纯度。
• Polymerisation inhibitor
  申请人：A H MARKS AND COMPANY LIMITED

  公开号：US20020040174A1

  公开（公告）日：2002-04-04

  A monomer composition, stabilized against premature polymerization, comprising: a) an ethylenically unsaturated monomer or mixture of monomers polymerizable by free radical initiation, and b) an effective amount, sufficient to inhibit premature polymerization of component (a) of a mixture of: i) 1 to 99% by weight, based on the total weight of components (i) and (ii), of a mixture of at least one aromatic amine and at least one organic acid in a molar ratio of 10:1 to 1:10, and ii) 99 to 1% by weight, based on the total weight of components (i) and (ii), of at least one stable radical compound.

  一种单体组合物，防止过早聚合，包括：a）一种由自由基引发聚合的乙烯基不饱和单体或单体混合物，和b）足以抑制组分（a）过早聚合的混合物的有效量，包括：i）占组分（i）和（ii）的总重量的1至99％的至少一种芳香胺和至少一种有机酸的混合物，其摩尔比为10:1至1:10，以及ii）占组分（i）和（ii）的总重量的99至1％的至少一种稳定自由基化合物。
• PRODUCTION OF TERT-BUTYL ESTERS OF ETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS
  申请人：BASF SE

  公开号：US20190002389A1

  公开（公告）日：2019-01-03

  A process for continuously preparing the tert-butyl ester of an ethylenically unsaturated carboxylic acid, by a) reacting an ethylenically unsaturated carboxylic acid with isobutene in the presence of an acidic catalyst to give an esterification mixture; b) removing the acidic catalyst; c) removing low-boiling components; and d) supplying a tert-butyl ester-comprising liquid to a distillation apparatus and subjecting it to purifying distillation in the distillation apparatus, where d 1 ) in the distillation apparatus the tert-butyl ester-comprising liquid is separated into a tert-butyl ester-comprising gaseous top product and a carboxylic acid-comprising liquid bottom product; d 2 ) the tert-butyl ester-comprising gaseous top product is at least partly condensed and the condensate is recycled partly as reflux to the distillation apparatus; d 3 ) the carboxylic acid-comprising liquid bottom product is recycled at least partly to step a); d 4 ) carboxylic acid-comprising liquid bottom product is drawn off and passed to a heater; a superheated, liquid recycle stream is taken from the heater; and the superheated recycle stream is let down into the distillatiuon apparatus; and d 5 ) at least in the top region of the distillation apparatus, the distillation apparatus walls in contact with the vapor, at least in sub-regions, are heated and/or thermally insulated. In the course of the process, the separation of the tert-butyl ester from unreacted carboxylic acid is carried on with a particularly low level of accompanying polymerization both of the tert-butyl ester and of the carboxylic acid.

  一种连续制备乙烯基不饱和羧酸叔丁酯的方法，包括以下步骤：a）在酸性催化剂存在下，将乙烯基不饱和羧酸与异丁烯反应，得到酯化混合物；b）去除酸性催化剂；c）去除低沸点成分；d）将含有叔丁酯的液体供给蒸馏设备，在蒸馏设备中进行纯化蒸馏，其中d1）在蒸馏设备中，将含有叔丁酯的液体分离成含有叔丁酯的气态顶部产品和含有羧酸的液态底部产品；d2）将含有叔丁酯的气态顶部产品至少部分冷凝，所得冷凝物部分作为回流物回收至蒸馏设备；d3）将含有羧酸的液态底部产品至少部分回收至步骤a）；d4）将含有羧酸的液态底部产品抽出并通过加热器，从加热器中取出过热的液态回收流，将过热的回收流放入蒸馏设备中；d5）至少在蒸馏设备的顶部区域，与蒸汽接触的蒸馏设备壁面至少在子区域中加热和/或热绝缘。在该过程中，从未反应的羧酸中分离出叔丁酯，伴随的叔丁酯和羧酸的聚合水平特别低。