Polyether defoamer is a product with high process requirements, its own high transparency, and silicon-free characteristics, so many industries like it very much, and for all walks of foam it can be a good solution, and the scope of application is very wide, while it is one of the several important types of defoaming products in industrial cleaning, fermentation, paper and coatings, and other industries can be used, and today I am To popularize the knowledge about this defoamer, for those who do not understand the polyether defoamer, as well as for those who have some understanding of it can come to see.
First of all, we need to understand the advantages of polyether defoamer
Polyether defoamer is a silicone-free product, as well as its own high transparency, so the use of the process will not appear in the case of silicon spots, while the high transparency and stability so that it does not affect the use of the product in the process of gloss, color, and other circumstances. At the same time, its defoaming and foam inhibition performance is also the only silicone defoamer, while there is no effect on microorganisms, and it also has high-temperature resistance, acid, and alkali resistance characteristics.
And because the main material of polyether defoamer is a peg, ppg, sodium dodecyl sulfate, and some other defoaming composition such as dibasic fatty acids, emulsifiers, foam inhibiting resins, hydrophobic agents, and other substances, after 160 ° C continuous heating and maintain the temperature in about 5 ~ 6 hours after continuous stirring, and then heated to 180 ° C insulation 20 min after waiting for its cooling to 40 ° There are some relatively complicated processes.
And polyether defoamer can be the following three kinds
1. GP type defoamer
And this kind of defoamer is through the glycerol as an auxiliary, in conjunction with the end of the chain into ethylene oxide and polypropylene glycol into the defoaming products, although it has a good defoaming performance and a long foam inhibition time, in its solubility in the foaming solution is small, as well as its hydrophilicity is relatively poor, so this defoamer is suitable for thin foaming solution, as well as suitable for the medium to inhibit the entire fermentation process appears in the Foam, and these foams to eliminate and inhibit the emergence of foam.
2. GPE type defoamer
This type of defoamer can be said to be in the gp type defoamer above the strengthening, because the gp type defoamer it as well as better foam inhibition and defoaming characteristics, so there is no special to strengthen this aspect of its performance but to strengthen its hydrophilicity, which also leads to the GPE class defoamer has good hydrophilicity, can be quickly dispersed in the foaming solution, good permeability, solubility.
3. GPES type defoamer
This type of polyether defoamer mainly uses of GPE-type defoamer chain end with hydrophobic stearate capping characteristics, so that its organic material into both ends are hydrophobic chain characteristics, and because of its block copolymer in the interval of hydrophilic chain, which will lead to the defoamer product defoamer molecules are easy to lie flat gathered in the gas-liquid critical point, which also leads to it has strong surface activity, so that it It has high defoaming efficiency, and all this is due to its block copolymer properties with hydrophilic chains in the middle.
