In solvent-borne coatings, solvent-free coatings, and printing ink formulations, foam and surface defects remain core pain points affecting film appearance and protection. Air entrainment during dispersion, grinding, roller coating, and spraying forms foam. If defoamer compatibility with resin is poor, it causes craters, pinholes, poor leveling, and Benard cells, leading to uneven gloss and reduced intercoat adhesion. Traditional mineral oil defoamers tend to bleed out in high-end solvent systems, affecting clarity. Ordinary PDMS defoamers have strong foam breaking but limited compatibility, and may still crater if surface tension is not low enough. With industrial, wood, and ink formulations demanding "strong defoaming, zero crater, good leveling, high gloss, mar resistance", finding a "polyether-modified silicone, ultra-low surface tension, highly compatible, multi-functional" defoamer has become a key formulation issue. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches Oil-Based Paint & Ink Defoamer IOTA 1823. Characterized by "polyether-modified polydimethylsiloxane; appearance translucent liquid; viscosity 150–300 cSt; active content 99.9%; surface tension 22.6 mN/m (25℃)", backed by "polyether-silicone compatible defoaming + ultra-low surface tension wetting + slip & mar resistance + leveling & anti-cell", it serves as the "mirror-finish choice" for solvent coating, achieving the leap from "ordinary silicone defoamer causing craters" to "polyether-modified compatible zero-defect". System Positioning: Polyether-Modified Silicone vs. Mineral Oil/Ordinary Silicone IOTA 1823 belongs to the polyether-modified silicone defoamer family, distinct from mineral oil and ordinary PDMS. Mineral oil bleeds and affects clarity in solvent high-gloss systems. Ordinary silicone, though defoaming strongly, has limited compatibility with some resins if surface tension is not sufficiently low, still risking craters. IOTA 1823, through polyether modification, achieves excellent compatibility with solvent-borne, solvent-free, and waterborne resin systems, defoaming without craters or leveling defects. Molecular Architecture: Polyether-Modified Siloxane + Ultra-Low Surface Tension + High Activity The core design of IOTA 1823 comes from polyether-modified siloxane structure:

• Polyether-Modified Siloxane Backbone: Siloxane provides low surface tension for rapid bubble breaking; polyether segments impart amphiphilicity, improving compatibility with organic solvents and resins, preventing bleeding and craters.
• Ultra-Low Surface Tension: Surface tension is only 22.6 mN/m (25℃), far below water (~72 mN/m) and most resins, enabling rapid spreading on foam lamellae to thin and rupture films. It also lowers overall coating surface tension, improving substrate wetting.
• High Active Content: 99.9% active content, nearly pure, minimizing impurity interference from diluents and ensuring batch stability.

Performance Leap: From "Defoam But Crater" to "Defoam and Level Together" Introducing IOTA 1823 brings the following improvements:

• Good Compatibility, No Craters: In solvent-borne formulations, it causes no craters or leveling defects.
• Substrate Wetting: By lowering coating surface tension, it improves wetting on substrates, reducing orange peel and misses.
• Surface Slip: Increases surface slip, improving mar resistance and blocking resistance.
• Leveling & Gloss: Improves leveling, increases gloss, prevents Benard cells, giving a mirror-flat film.
• Multi-System Universal: Suitable for solvent-borne, solvent-free, and waterborne coating systems.
• Low-Dosage Efficiency: Recommended only 0.05–0.5% for oil systems, 0.3–1% for solvent-free.
• Safe Transport: Transported as general goods, lowering compliance cost.

Application Penetration: From Solvent Industrial Paint to Solvent-Free Coating IOTA 1823 covers multi-system coating scenarios:

• Solvent-Borne Coatings: Defoaming and leveling in industrial, wood, automotive solvent formulations.
• Solvent-Free Systems: Defoaming in solvent-free coatings, floor paints, and high-solid formulations.
• Ink Field: Foam control and leveling optimization in oil-based printing inks.
• Waterborne Systems: Can be added to waterborne coatings for both defoaming and wetting.

IOTA Technical Guide: Dose by System, Cool and Sun-Avoiding

• Application: For oil systems, recommended 0.05–0.5% of total formulation; for solvent-free, 0.3–1%. Adjust per resin type, solvent system, and application method; trial first.
• Addition: Can be added during grinding or letdown, ensuring uniform dispersion.
• ⚠️ Taboo: Store in a cool dry place, avoid direct sunlight to prevent degradation or package deformation. Reseal after use to prevent contamination. High active content with moderate viscosity (150–300 cSt); avoid prolonged high-temperature storage causing viscosity change.
• Storage: 25kg plastic drum (or per customer request); store in cool dry place, avoid sunlight; shelf life ≤1 year; transport as general goods. Unlike IOTA 1831 (50/200kg drum), 1823 uses 25kg drum, polyether-modified, 99.9% active.

Industry Insight: The core value of polyether-modified silicone defoamer lies in "polyether chain for compatibility, siloxane chain for low surface tension, ultra-low surface tension for substrate wetting and leveling". IOTA 1823, with "polyether-modified polydimethylsiloxane, translucent liquid, viscosity 150–300 cSt, active 99.9%, surface tension 22.6 mN/m, oil 0.05–0.5%, solvent-free 0.3–1%" hard parameters, fills the mirror-finish base link of domestic polyether-modified silicone in compatible defoaming and leveling for solvent, solvent-free, and waterborne coatings. For coating manufacturers, it upgrades film appearance pass rate and gloss premium along the path of "mineral oil defoamer → ordinary silicone defoamer → polyether-modified silicone compatible defoamer".