5-(β-Methoxyethyl)-hydantoin | 24884-76-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 英文名称: 5-(β-Methoxyethyl)-hydantoin
• 英文别名: 5-(2-methoxy-ethyl)-imidazolidine-2,4-dione；5-(2-Methoxyethyl)imidazolidine-2,4-dione
• CAS: 24884-76-2
• 化学式: C₆H₁₀N₂O₃
• 分子量: 158.157
• InChiKey: MYKZVJWIZMCYEW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.8
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  67.4
• 氢给体数：
  2
• 氢受体数：
  3

文献信息

• Method for time-dependent decrease of ph in a cosmetic composition and a composition for permanent hair shaping with time-dependent decrease of the wave-shaping efficiency
  申请人：Wella Aktiengesellschaft

  公开号：EP1500386A1

  公开（公告）日：2005-01-26

  A method for time dependent decrease of pH in a cosmetic composition for treating skin or hair, preferably a method for permanently shaping hair, for which, immediately before use, an enzyme that catalyzes an acid-generating reaction with a non-ester substrate to form a ready-to-apply cosmetic composition is added immediately (preferably 5 seconds to 3 minutes) prior to use to an alkaline composition having an initial pH of 7.0 to 14 and comprising a non-ester substrate,. Than the hair, before and/or after it is held in the desired shape, is treated with the ready-to-use agent and, after the period of action, is rinsed with water. Thereafter the hair is treated oxidatively, rinsed again with water, optionally laid into a water wave and then dried. Preferably the enzyme and the non-ester substrate is selected so that the initial pH of 7.0 to 12 is lowered within a time interval of from 5 to 40 minutes by at least 0.5 pH units.

  一种使用于治疗皮肤或头发的化妆品组合物中的 pH 值随时间变化而降低的方法，最好是一种使头发永久定型的方法，为此，在使用前，立即（最好是 5 秒至 3 分钟）向初始 pH 值为 7.0 至 14 且包含非酯类底物的碱性组合物中加入一种酶，该酶可催化与非酯类底物的酸生成反应，从而形成一种即用型化妆品组合物。然后，在头发保持所需的形状之前和/或之后，用即用型药剂处理头发，并在作用期结束后用水冲洗。然后对头发进行氧化处理，再次用水冲洗，可选择将头发铺成水波状，然后烘干。最好选择酶和非酯类底物，以便在 5 至 40 分钟的时间间隔内将 7.0 至 12 的初始 pH 值降低至少 0.5 个 pH 单位。
• Method for time-dependent decrease of pH in a cosmetic composition and a composition for permanent hair shaping having time-dependent decreasing wave-shaping efficiency
  申请人：Rozzell David

  公开号：US20050025735A1

  公开（公告）日：2005-02-03

  A method for providing a time-dependent decrease of pH in a cosmetic composition is described. A method of permanently shaping hair is also described, in which, immediately prior to use, an enzyme that catalyzes an acid-generating reaction with a non-ester substrate is added to an alkaline composition, which contains the non-ester substrate, to form a ready-to-apply cosmetic composition. Then the hair, before and/or after it is put in a desired shape, is treated with the ready-to-apply cosmetic composition and, after a period of action, is rinsed from the hair with water. Thereafter the hair is oxidatively treated, rinsed again with water, optionally put in a water wave and dried. Preferably the enzyme and the non-ester substrate are selected so that the initial pH decreases by at least 0.5 pH units within a time interval of from 5 to 40 minutes.

  描述了一种使化妆品组合物中的 pH 值随时间降低的方法。还描述了一种永久性塑造头发形状的方法，其中，在使用前，立即将催化与非酯底物发生酸生成反应的酶添加到含有非酯底物的碱性组合物中，以形成一种即用型化妆品组合物。然后，在将头发梳成所需形状之前和/或之后，用即用型化妆品组合物处理头发，作用一段时间后，用水冲洗头发。然后，对头发进行氧化处理，再次用水冲洗，最后进行水波纹处理并烘干。最好选择酶和非酯类底物，使初始 pH 值在 5 至 40 分钟的时间间隔内至少降低 0.5 个 pH 单位。