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High Performance Polycarboxylic Acid Series Water Reducing ...

For polycarboxylic acid (PCA) water reducers, effective antifoams include modified polyethers, silicone-based agents, and certain hydroxyl compounds, often used as water emulsions for compatibility, controlling foam from surfactants in concrete mixes. Key choices involve balancing foam knockdown with preserving beneficial air bubbles (defoaming vs. deaeration), with polyglycols and silicone emulsions being common, though trials determine the best fit for specific cement/fly ash systems to maintain workability and strength.

Hydroxyl Compounds: Products like AF-766 and AF-801 from www.antifoamchemical.com are specifically noted for compatibility with PCA water reducers, offering good dispersion and foam control.
Modified Polyethers/Polysiloxanes: These are often used in composite defoamers for concrete and mortar, offering broad performance against micro and macrofoam.
Silicone-Based: Excellent for extreme foaming (e.g., from carbon/iron oxides), but must be dosed carefully as they can eliminate desirable air bubbles, impacting frost resistance.
Polyglycols: Used for general organic foam issues, compatible with many PCA applications.

Compatibility: The antifoam must disperse well in the PCA system without negatively affecting cement hydration or workability.
Foam Type: Determine if you need a defoamer (breaks existing foam) or a deaerator (controls air entrainment). PCA systems need a balance to reduce slump loss but keep some air.
Emulsion Type: Water-based emulsions without hydrocarbon carriers (like kerosene) are preferred for waterborne systems to avoid contamination.
Dosage: Start low (e.g., 100 ppm for polyglycols, 10-25 ppm for silicones) and adjust; high doses can damage concrete properties.

Antifoams & Defoamers – Coastal Chemical
Selecting the right antifoam can be a trial and error process. Some recommended levels of antifoam include: * **Polyglycol** 100 p...
Coastal Chemical
Polycarboxylate water reducer with defoaming function and ...
The disadvantage of the prior art is that after compounding polycarboxylate water reducer and defoamer, the workability of concret...
Google Patents
Antifoams - CATACARB
Sep 25, 2023 — CATACARB is a polyglycol-based antifoam that can help prevent foaming caused by organic contaminants. It's available i...
catacarb

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Defoamer for Water Reducing Agent

ywlchemical.com

https://ywlchemical.com › defoamers-for-water-reducin...

ywlchemical.com

https://ywlchemical.com › defoamers-for-water-reducin...

Oct 22, 2025 — Persistent Foam Control:Provides long-lasting foam suppression, not just initial knockdown, ensuring air content remains stable over time.Read more

Custom Polyether Antifoam SP-871 Factory, Manufacturer

Sixin Group

https://www.sixindefoamer.com › Construction

Sixin Group

https://www.sixindefoamer.com › Construction

Experience superior foam suppression with SP-871, recommended for mortar, polycarboxylic acid reducers, and leachate treatment.

Antifoam and defoamer

zhejiang ruico advanced materials co., ltd.

https://www.ruicoglobal.com › news › antifoam-and-def...

zhejiang ruico advanced materials co., ltd.

https://www.ruicoglobal.com › news › antifoam-and-def...

The compounding with polycarboxylic acid water reducing agent requires good compatibility of defoamer and water reducing agent, little effect on water reducing ...Read more

Polyether Antifoam - Excellent Stability Defoamer AF-060

antifoamchemical.com

https://www.antifoamchemical.com › excellent-stability-d...

antifoamchemical.com

https://www.antifoamchemical.com › excellent-stability-d...

Long-lasting defoamer liquid AF-766. The composition of AF766 is a hydroxyl compound. It can be used in landfill leachate and polycarboxylic acid water reducer.Read more

The role of defoaming agents

Sure Chemical Co., Ltd. Shijiazhuang

https://www.surechemical.com › aboutus › RP20231204-...

Sure Chemical Co., Ltd. Shijiazhuang

https://www.surechemical.com › aboutus › RP20231204-...

Dec 4, 2023 — Polycarboxylic acid-based high-performance water-reducing agent is a general term for a series of polymers with specific molecular structures ...Read more

Missing: ~~antifoam~~ ‎| Show results with: antifoam

Polyether Antifoam

jufuchemtech.com

https://www.jufuchemtech.com › polyether-antifoam

jufuchemtech.com

https://www.jufuchemtech.com › polyether-antifoam

The sensitivity of polycarboxylic acid water reducer to mud content The mud content in the raw materials of concrete, sand and gravel, will have an irreversible ...Read more

Polycarboxylate water reducer with defoaming function and ...

Google Patents

https://patents.google.com › patent

Google Patents

https://patents.google.com › patent

The choice of monomer with defoaming function is to use unsaturated double bonds to connect 3-5 carbon atoms, and then connect polyether with corresponding ...Read more

Missing: ~~antifoam~~ ‎| Show results with: antifoam

Custom Polyether Defoamer SP-871 Factory, Manufacturer

Sixin Group

https://www.sixindefoamer.com › Water Treatment

Sixin Group

https://www.sixindefoamer.com › Water Treatment

SP-871 polyether compound defoamer: delivers exceptional foam suppression for landfill leachate, concrete, mortar, and polycarboxylic acid water reducers.

Application of defoamer in high performance water reducing ...

iotadefoamer.com

https://www.iotadefoamer.com › news1-1043

iotadefoamer.com

https://www.iotadefoamer.com › news1-1043

The combination with polycarboxylic acid superplasticizer requires good compatibility between defoamer and superplasticizer, little influence on the water ...Read more

Wholesale antifoam for Polycarboxylic acid water reducer,antifoam ...

antifoamchemical.com

https://www.antifoamchemical.com › antifoam-for-polyc...

antifoamchemical.com

https://www.antifoamchemical.com › antifoam-for-polyc...

The composition of AF-801 is a hydroxyl compound. It can be used in landfill leachate, polycarboxylic acid water reducer and calcium silicate board.

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AI Overview

Defoamer for Water Reducing Agent

Custom Polyether Antifoam SP-871 Factory, Manufacturer

Antifoam and defoamer

Polyether Antifoam - Excellent Stability Defoamer AF-060

The role of defoaming agents

Polyether Antifoam

Polycarboxylate water reducer with defoaming function and ...

Custom Polyether Defoamer SP-871 Factory, Manufacturer

Application of defoamer in high performance water reducing ...

Wholesale antifoam for Polycarboxylic acid water reducer,antifoam ...

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