Kinds of defoamers: Based on different classification standards, defoamers might have many methods, for example, solid particle type, emulsion type, dispersion type, oil type, and paste type based on the form based on the use of defoamer in various industrial production It may be split into textile industry defoamers, paper industry defoamers, coating industry defoamers, food industry defoamers, and oil industry defoamers, etc. based on the chemical structure and composition of defoamers could be split into mineral oil, Alcohols, essential fatty acids, and essential fatty acid esters, amides, phosphate esters, silicones, polyether-modified polysiloxane defoamers.
The next four kinds of non-plastic type chemical, polyether type, silicone type, and polyether-modified silicone type are introduced.
Non-plastic type
Non-plastic defoamers mainly include alcohol, essential fatty acids, essential fatty acid esters, phosphate esters, mineral oils, amides along with other organic substances. One of the amides, monoamides, bisamides, etc. are generally used, additionally, to trialkyl Melamine, cyanuric chloride, melamine, fatty amine along with other nitrogen-that contains compounds phosphate esters include monoalkyl, dialkyl phosphate, and fluorinated alkyl phosphate, etc., generally utilized in defoaming paint detergent products carboxylates include Three kinds of substances: essential fatty acids, for example, lauric acidity, palmitic acidity, etc. essential fatty acid esters, for example, essential fatty acid glycerides, animal and vegetable oils, etc. essential fatty acid soaps, for example, calcium, aluminum, and magnesium soaps of stearic acidity and palmitic acidity fatty alcohols and ethers including Straight line and branched-chain alcohols, ethers.
This kind of defoamer is affordable, which is appropriate to be used underneath the conditions of low liquid shearing pressure and mild foaming ability from the surfactant contained. Its preparation recyclable are simple to obtain, high ecological protection performance, and occasional production cost. The defoaming efficiency of dense foam is low, these types of its strong specificity, the share of the market continues to be shrinking. However, in certain special industries, for example, strong acids and alkalis, non-plastic defoamers which are resistant against acids and alkalis for example PTFE are essential.
Polyether type
Polyether defoamer is really a copolymer of ethylene oxide and propylene oxide. It mainly uses its solubility at a specific temperature to attain its defoaming effect. At cold, the polyether is spread in water. Once the temperature increases, the hydrophilicity from the polyether progressively decreases. Once the cloud point is arrived at, the polyether becomes insoluble, in order that it can enjoy a defoaming effect. Throughout the preparation process, the cloud point could be altered by modifying the kind of polyether and the number of recyclables, that you can use in various industries.
Polyether defoamer has excellent qualities for example strong foam suppression and temperature resistance. The disadvantage is it includes a certain amount of toxicity. The utilization of the weather is restricted to temperature, the froth breaking rates are not high, and also the application field is narrow. If the quantity of foam created is simply too large, it can't rapidly get rid of the foam, and defoamer must be included in it again to exhibit the defoaming effect. Polyether defoamers mostly are split into GP type, GPE type, and GPS type.
Article source: https://article-realm.com/article/Finance/8477-Antifoam-is-a-Kind-of-Amazing-Chemical-Product.html
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