Yes. The physical defoaming ability of alcohol ether depends on whether the formula contains other surface activities that are easy to foam. Because in addition to defoaming, propylene glycol methyl ether also acts as a leveling agent, so if the addition amount is small, it is It has no defoaming effect. This requires specific detection of the composition of the solvent.
Common water-soluble alcohols and alcohol ether solvents have good defoaming capabilities. They all have low surface tension and the addition of ether groups in alcohol ethers further improves non-polarity. Foam suppression of the solvent system (the longer the alkyl branch chain in the alcohol ether structure, the stronger the ability to adjust the surface tension of water and oil and the easier it is to defoam), please refer to it as appropriate. Relatively speaking, the defoaming of ethylene glycol ethers is better than that of propylene glycol ethers. For example, the two common anti-whitening water-resistant ethylene glycol butyl ethers, ethylene glycol tert-butyl ether and diethylene glycol butyl ether are commonly used in water-based color pastes. For low toxicity, you can consider ethylene glycol tert-butyl ether, which has a slight mint flavor and works well.
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