설명(영) |
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Lanolin (or wool wax or wool grease) is the fatty secretion of the sebaceous glands of sheep. It is recovered from wool and then processed, refined, and chemically modified to yield a large number of useful cosmetic raw materials, generically called Lanolin and Lanolin Derivatives.
Lanolin is a complex esterified mixture of high molecular weight Esters of (hydroxylated) Fatty Acids with aliphatic and alicyclic Alcohols and Sterols. Hydrolysis yields a mixture of compounds; purification yields individual components which may then be further modified by alkoxylation, esterification, or amidation to form materials not found in natural lanolin. Lanolin can also be separated into components by temperature-dependent physical or mechanical methods. This yields a variety of materials, possessing different properties, which can then be subjected to further chemical processes.
The original lanolin and its derivatives include hard solids, unctuous pastes, and mobile liquids; they may be water-soluble or water insoluble; they may be rather impure mixtures (e.g., Lanolin Wax) or fairly pure compounds (e.g., Lanosterol). Lanolin is also an important commercial source of certain sterols, especially Cholesterol. The characteristics of lanolin derivatives are variable, and these materials find uses in all types of cosmetics designed for skin and hair care. |