Wetting Agent - Enhanced Wetting for Improved Coating Performance
Product Overview
Wetting Agent is a next-generation polyether-modified polysiloxane additive engineered to overcome surface energy challenges in modern coating formulations. By dynamically reducing liquid surface tension to 20–22 mN/m (ISO 304), this agent ensures complete substrate coverage on hard-to-wet surfaces including plastics, weathered metals, and contaminated substrates. Compatible with waterborne, solvent-borne, high-solids, and UV-curable systems, it eliminates cratering, fisheyes, and orange peel while improving adhesion strength by 30–50% (ASTM D4541). Certified for automotive OEM, aerospace, and industrial maintenance coatings, this additive enables uniform film formation at 0.05–0.3% dosage, maintaining compliance with REACH, FDA 21 CFR 175.300, and ISO 8130-6 standards.
Core Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | Clear to pale yellow liquid | Visual |
| Active Content | 100% | ISO 3251 |
| Density @25°C | 1.01–1.03 g/cm³ | ISO 2811 |
| Viscosity @25°C | 150–300 mPa·s | ASTM D2196 |
| Surface Tension | 20.5 mN/m (0.1% in deionized water) | ISO 304 |
| HLB Value | 8–10 | Griffin Method |
| Flash Point | >150°C | ISO 3679 |
| pH Value | 6.5–7.5 | ASTM E70 |
| Solubility | Water, alcohols, glycol ethers | – |
| Recommended Dosage | 0.05–0.5% (on total formulation) | – |
Advanced Functionality
1. Surface Energy Optimization
- Critical Surface Tension Reduction:
- Lowers substrate surface energy to 22–24 mN/m (Zisman Plot analysis).
- Enables wetting on PP/PE plastics without flame treatment.
- Contact Angle Control:
Substrate Untreated With Wetting Agent Galvanized Steel 85° 12° Polypropylene 105° 35° Powder-Coated Surface 75° 18°
2. Defect Prevention Mechanisms
- Marangoni Flow Control:
- Neutralizes surface tension gradients within 15–30 seconds.
- Reduces crater count from >10/cm² to <0.2/cm² (ISO 16925).
- Anti-Crawling Technology:
- Maintains contact line stability on low-energy surfaces.
- Eliminates edge retraction in coatings with >50% solids content.
Performance Advantages vs. Conventional Surfactants
| Property | Wetting Agent | Silicone Surfactants | Fluorinated Additives |
|---|---|---|---|
| Surface Tension | 20–22 mN/m | 24–26 mN/m | 15–18 mN/m |
| Foam Generation | Negligible (self-deaerating) | High (requires defoamer) | Moderate |
| Thermal Stability | Stable to 250°C | Degrades above 180°C | 150°C limit |
| Recoatability | No interlayer adhesion loss | 5–10% adhesion reduction | Risk of delamination |
| Cost Efficiency | 0.1% dosage achieves equivalent performance to 0.5% fluorosurfactants | – | – |
| Environmental Impact | Biodegradable (OECD 301F) | Persistent in environment | PFAS-free formulation |
Formulation Guidelines
1. Optimal Incorporation Protocols
| Coating Type | Dosage Range | Addition Stage |
|---|---|---|
| Waterborne Acrylics | 0.1–0.3% | Post-dispersant, pre-thickener |
| Solvent-Borne Epoxies | 0.05–0.2% | During resin thinning phase |
| UV-Curable Inks | 0.2–0.5% | Pre-photoinitiator addition |
| High-Solids Polyurethanes | 0.08–0.15% | Post-catalyst addition |
2. Compatibility Matrix
- Synergistic Combinations:
- Rheology modifiers: Enhances flow without sagging.
- Dispersing agents: Improves pigment stabilization.
- Avoid:
- Cationic surfactants (risk of precipitation).
- High-polarity solvents (may reduce effectiveness).
Industry-Specific Applications
1. Automotive Coatings
- Plastic Component Coating:
- Adhesion promotion on TPO bumpers: >4.5 MPa (ISO 2409).
- Eliminates peeling in humidity cycling tests (85°C/85% RH, 1,000h).
- E-coat Pretreatment:
- Reduces surface defects by 90% on complex geometries.
- Maintains throwing power >85% in recessed areas.
2. Industrial Maintenance Coatings
- Rusty Steel Substrates:
- Penetrates mill scale/rust layers (SSPC-SP 11 compliant).
- DFT uniformity: ±5μm on pitted surfaces.
- Concrete Floor Coatings:
- Reduces pore infiltration by 70% (Mercury Intrusion Porosimetry).
- Achieves 100% substrate wetting on damp concrete (4% moisture content).
3. Electronics & Functional Coatings
- PCB Conformal Coatings:
- Wraps around 0201 components without bridging.
- Maintains impedance stability >10¹² Ω (IPC-CC-830B).
- Anti-Fingerprint Coatings:
- Creates uniform monolayer coverage on glass/metal.
- Contact angle hysteresis <10° (ISO 19403-6).
Technical Performance Data
1. Rheological Impact
- Viscosity Profile:
Shear Rate Viscosity (mPa·s) 10,000 s⁻¹ (spray) 80–120 1,000 s⁻¹ (brush) 150–200 1 s⁻¹ (leveling) 800–1,200 - Thixotropic Index: 0.7–0.9 (ISO 3219).
2. Environmental Durability
| Test | Conditions | Performance |
|---|---|---|
| QUV-A Exposure | 2,000h | ΔE <1.0, Gloss retention >95% |
| Salt Spray (ASTM B117) | 1,000h | No undercut corrosion |
| Chemical Resistance | 28d immersion in 10% NaOH | Rating 8B (cross-cut adhesion) |
| Thermal Shock | -40°C ↔ +150°C, 50 cycles | No cracking/peeling |
Safety & Regulatory Compliance
1. Handling & Storage
- PPE Requirements: Safety goggles, nitrile gloves.
- Storage Temperature: 5–35°C in original sealed containers.
- Shelf Life: 36 months (batch code verified).
2. Certifications
- REACH: Fully registered, SVHC-free.
- Food Contact: FDA 21 CFR 175.300 compliant.
- Ecolabels: EU Ecolabel, Blue Angel certified.
Packaging Options
| Package Type | Volume | Features |
|---|---|---|
| HDPE Jerrycans | 5 kg, 25 kg | UV-resistant, stackable |
| Stainless Steel Drums | 200 kg | UN-certified, vapor-tight |
| IBC Containers | 1,000 kg | Forklift compatible, RFID tagged |
Technical Support Services
- Surface Energy Mapping: Contact angle measurements across substrate batches.
- Defect Analysis: High-speed video microscopy for wetting process optimization.
- Custom Formulation: DOE (Design of Experiments) for niche applications.
Competitive Advantages
- Universal Compatibility: Performs in polar/apolar systems without separation.
- Defect Elimination: Reduces coating rework costs by up to 65%.
- Process Stability: Maintains effectiveness across pH 4–10.
- Sustainability: 100% active content, zero VOC contribution.
Conclusion
Wetting Agent represents a quantum leap in surface energy management technology, enabling coatings to achieve perfect substrate interaction across increasingly diverse industrial applications. By combining rapid surface tension reduction with controlled flow behavior, it eliminates application defects while enhancing coating durability and appearance. From automotive plastics requiring flawless aesthetics to offshore structures demanding relentless corrosion protection, this additive delivers consistent performance that meets global quality standards. Supported by comprehensive technical data and regulatory compliance, it empowers formulators to push the boundaries of coating performance while maintaining environmental responsibility.
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| Company Name | Beijing TDD E-commerce Co., Ltd | Country/Region | China |
| Business Type | Online Store | Company Size | 2000 |
| Established | December 18, 2014 | ||
| Address | Building No.3, Area 6, No.188, West of South Forth Ring Rd, Beijing, China | ||
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Beijing United Information Technology Co., Ltd. (Stock Code: 603613. SH), founded in 2002 and listed on the Main Board in July 2019, is mainly engaged in industrial e-commerce and industrial Internet platforms. Based on industrial e-commerce and supported by industrial big data and industrial digitalization, the company provides online commodity trading, business information services and digital technology services of industrial products and raw materials for related industries. In terms of business model, it is called "the industrial version of Pinduoduo" and "the industrial version of JD.com".
About Beijing TDD E-commerce Co., Ltd.
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Beijing TDD E-commerce Co., Ltd. (shortly named TDD Global) is the core subsidiary of Guolian Corporation (Stock Code: 603613.SH) and the first industrial Internetplatform of Duoduo Series Platforms. The company mainly engages in B28 e-commerce transaction serices of raw material and industrial products, digital supply chain serices, industrial digitalization serices and industrial big data serices, and is committed to promoting the deep integration of traditional industries and new technologies such as the Internet, Internet of Things, big data, intelligent manufacturing and block chain, etc.
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