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    Surfactant Intermediates

    单硬脂酸甘油酯

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    关于此产品

    单硬脂酸甘油酯是甘油与硬脂酸的部分酯,由油脂水解的两种主要产物重新酯化而成。外观为乳白色至淡黄色蜡状或粉状固体,无臭无味,凝固点 60-70C,25 kg 袋装。植物基产品,脂肪酸来自棕榈,提供单甘酯总含量 40% 与 90% 两种规格。

    甘油三酯水解可得到脂肪酸和甘油;把这两种产物重新酯化,就得到一种兼具亲水头基和亲油尾链的部分甘油酯——一种完全出自同一原料体系的非离子型乳化剂。其作用机理是停留在两相界面上:甘油骨架上未酯化的羟基朝向水相,C18 链朝向油脂相,降低界面张力,使液滴不易聚并。由于三个羟基中只有一个被酯化,亲水贡献有限,HLB 值较低,约在 3.8 左右,因此它属于油包水(W/O)型乳化剂而不是水包油型,这也是它通常与 HLB 更高的表面活性剂配合用作助乳化剂、而不是单独使用的原因。蒸馏法制得的 90% 规格中游离甘油和双甘酯含量远低于 40% 规格——游离甘油≤1.5%,而后者为 7.0%——在乳化剂是配方中的明确组分而不是大宗添加剂时,这一差别很重要。

    用作非离子型乳化剂、助乳化体系组分、个人护理配方原料以及表面活性剂中间体。

    Bio Green Oleo 按单甘酯总含量、酸值、碘值、游离甘油与凝固点的规格要求供应单硬脂酸甘油酯。

    规格

    ChemistryGlycerol ester of stearic acid, non-ionic
    40% monoglyceride gradeTotal monoglyceride 40.0% min, acid value 5.0 mg KOH/g max, iodine value 1.5 g I2/100g max, free glycerin 7.0% max, freezing point 60-70C
    90% monoglyceride grade (distilled)Total monoglyceride 90.0% min, acid value 6.0 mg KOH/g max, iodine value 1.0 g I2/100g max, free glycerin 1.5% max, freezing point 60-70C
    AppearanceMilky white to pale yellow waxy or powdery solid, odourless and tasteless
    Packaging25 kg bags
    OriginVegetable-based, from palm-derived fatty acids

    应用

    Non-ionic emulsifierCo-emulsifier systemsPersonal care formulationSurfactant intermediates

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