Natural fatty alcohol and ethylene oxide adducts
Fatty alcohol polyoxyethylene ether (AEO) is the fastest growing non ionic surfactant, the largest amount of varieties. This type of surface active agent is composed of polyethylene glycol (PEG) and fatty alcohol ether, condensation, represented by the following formula: RO (CH2CH2O) nH, where n is the degree of polymerization for polymerization type of polyethylene glycol and fatty alcohol degree of different varieties. The trade name Brij, such as Brij30 and Brij is different from the number of polyethylene glycol and lauric acid condensation, O/W can be used as emulsifier.
R is generally saturated or unsaturated hydrocarbon C12~18, can be straight chain alkyl, can also be a branched alkyl. N is ethylene oxide adduct number, namely oxyethylene surfactant molecules in the number of. N is larger, the more pro molecular oxygen water, forming more hydrogen bonds and water can be water soluble, better. N=1~5, product oil soluble and insoluble in water, often for the preparation of sulfuric acid esters of anionic surfactant. N=6~8 material, can dissolve in water, commonly used for textile detergent and oil emulsifier. N=10~20, used as an emulsifying agent and leveling agent in industry.
When the carbon chain R C7~9, n=5, fatty alcohol polyoxyethylene ether generated in the industry known as penetrating agent JFC (Penetrating agent JFC). When the carbon chain R C12~18, called n=15~20, peregal O fatty alcohol polyoxyethylene ether generated in industry (Peregal O). When the carbon chain R as C12, fatty alcohol polyoxyethylene ether formation is commonly known as AEO.
Fatty alcohol polyoxyethylene ether molecules of ethylene oxide number can be adjusted during the synthesis process, so it can be made of a series of non-ionic surface active agent. Different properties and uses of fatty alcohol polyoxyethylene ether is a kind of nonionic surfactant. The most important ether bond in a molecule is not easy to be acid, alkali so, high stability, good water solubility, electrolyte resistance, biodegradability, little foam. In addition to a large number of used in textile printing and dyeing industry, but also a large number of compound for low foam liquid detergent.
Not sensitive to low temperature water, good washing performance, but with the increase of temperature, the solubility will be gradually reduced. However, they will be in the air in a slow oxidation, produce some oxidation products, such as acetaldehyde and hydrogen peroxide, the surface activity of these oxides than those who have not yet happened in the agent on the skin more toxic.
