Defoamer classification
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Defoamers can be roughly divided into two categories: one is able to eliminate the generated bubbles, such as ethanol; the other is able to inhibit the formation of bubbles, such as emulsified silicone oil; currently, defoamers approved for use in China include emulsified silicone oil, high-carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropanol amine ether, polyoxypropylene glycerin ether and polyoxypropylene ethoxylate There are 7 kinds of allyl ether and polydimethylsiloxane.