Enhanced Surface Quality in Gypsum Applications: The Science of Effective Defoaming

In the European construction and building materials sector, the demand for high-performance gypsum-based products—from self-leveling screeds to high-strength plasterboards—has never been higher. However, achieving a flawless, high-density finish requires more than just high-quality calcium sulfate ($CaS{O}^4\cdot 2H^{2}O$); it requires precise control over air entrainment.

This article examines the critical role of specialized defoamers in gypsum applications and how YuanlianChemical is helping formulators meet the most rigorous European standards for surface aesthetics and structural integrity.

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The Invisible Enemy: Why Foam Compromises Gypsum

During the mixing and application of gypsum-based mortars or slurries, air is inevitably entrained. While some controlled air can improve workability, excessive or unstable foam leads to significant failures:

1. Surface Defects (Pinholes): Small bubbles that migrate to the surface create "craters" or pinholes, ruining the aesthetic of decorative plasters and requiring costly rework.

2. Structural Weakness: Large internal voids act as stress concentrators, significantly reducing the compressive and flexural strength of the hardened gypsum.

3. Inconsistent Density: Uncontrolled foam makes it difficult to maintain precise density specifications, which is critical in automated plasterboard production lines.

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The YuanlianChemical Advantage: Precision Air Release

At YuanlianChemical, we recognize that "one size fits all" does not apply to construction chemicals. Our range of gypsum defoamers is engineered to tackle air entrainment at two distinct levels: defoaming (breaking existing bubbles) and antifoaming (preventing new bubble formation).

1. Powder Defoamers for Dry-Mix Mortars

For dry-mixed products like gypsum-based self-leveling floors, our powder-based defoamers offer:

• Instant Activation: Rapid dissolution upon water contact for immediate air release.

• Long-term Stability: Excellent shelf-life without clumping or losing efficacy during storage.

• Compatibility: Seamless integration with other additives like cellulose ethers and superplasticizers.

2. Liquid Defoamers for Plasterboard Production

In high-speed industrial manufacturing, YuanlianChemical’s liquid solutions provide:

• Superior Shear Resistance: Maintaining performance even under the high-shear mixing conditions of industrial board lines.

• Low Dosage, High Efficiency: Optimizing production costs by requiring minimal active material to achieve maximum bubble suppression.

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Sustainability and Compliance in the European Market

Modern European construction is defined by the European Green Deal and strict VOC (Volatile Organic Compound) limits. Formulators are increasingly under pressure to choose "cleaner" additives.

YuanlianChemical is committed to this transition. Our latest generation of defoamers is designed to be:

• Low-VOC / Zero-VOC: Ensuring compliance with indoor air quality certifications like EMICODE® EC1plus.

• REACH Compliant: Fully meeting the safety and environmental transparency requirements of the European market.

• APE-Free: Formulated without alkylphenol ethoxylates to protect aquatic environments.

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Technical Performance Table

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Conclusion: Elevating Gypsum Standards

The difference between a mediocre gypsum finish and a premium, high-strength surface often lies in the choice of defoamer. By utilizing YuanlianChemical’s advanced molecular technology, formulators can ensure their products stand out in the competitive European landscape.