Polyether-based defoamers (non-silicone) are block copolymers of ethylene oxide (EO) and propylene oxide (PO). They belong to the second generation of silicone-free defoamers, exhibiting extremely strong foam suppression, high temperature resistance, strong alkali resistance, and no residue. They are widely used in fermentation, papermaking, water treatment, and high-temperature systems.

Core Parameters

Appearance: Colorless/Pale Yellow Transparent Liquid

Type: GP Type, GPE Type, GPES Type

pH: 5–7
Temperature Resistance: 100–120℃ (High cloud point type can reach 130℃)

Features: Silicone-free, long-lasting foam suppression, alkali resistant, high temperature resistant, good compatibility

Main Applications

Bio-fermentation: Antibiotics, MSG, citric acid, yeast (GPE type is most commonly used)

Paper black liquor/high-temperature pulp washing: Alkali resistant, high temperature resistant

Water-based coatings/emulsion polymerization: Transparent system, no silicon requirement

Wastewater treatment/desulfurization tower: High pH, ​​high temperature conditions

Pesticides, fertilizers, sugar refining, food processing (compliant grade)

Product Advantages

✅ Extremely strong foam suppression: Long-term suppression of regenerated foam

✅ High temperature and strong alkali resistance: Stable at pH 8–14, does not decompose at 120℃

✅ Silicone-free and pollution-free: Does not clog membranes, does not affect product transparency

✅ Customizable cloud point: Different models can be customized according to process temperature