Speciality Additive, Water-borne, Wetting & Levelling Agent

VP 7423 Water-based substrate wetting agent

The 7423 Water-based substrate wetting agent is a high-performance, polyether-modified polysiloxane surfactant engineered specifically for demanding aqueous coating systems. This specialized additive is designed to drastically reduce the static and dynamic surface tension of water-borne formulations, ensuring exceptional wetting on low-energy or contaminated substrates. By facilitating a uniform spread of the liquid phase, 7423 effectively eliminates common surface defects such as craters, pinholes, and fish-eyes, which are often problematic in industrial applications. Its unique molecular architecture provides an optimal balance between compatibility and surface activity, making it an essential component for high-quality finishes. Furthermore, 7423 enhances the overall leveling properties without significantly increasing foam stabilization, a common drawback in traditional surfactants. As modern regulations push for lower VOC profiles, this wetting agent provides the necessary performance to maintain aesthetic and protective integrity in water-based paints, inks, and adhesives across diverse industrial sectors, ensuring a flawless and professional finish for coatings.

Attributes

Key Features and Benefits

Superior Surface Tension Reduction: Efficiently lowers surface tension to 20-22 mN/m, ensuring complete coverage on difficult substrates.
Excellent Substrate Wetting: Facilitates wetting on plastics and oily metals, effectively preventing shrinkage and crawling defects.
Anti-Crater Performance: Prevents surface defects caused by external contaminants like dust or oil during the film-forming process.
Enhanced Leveling: Promotes a smooth, mirror-like finish by significantly improving the flow of the wet film.
High Recoatability: Minimal impact on inter-coat adhesion, allowing seamless multi-layer application.
Optimal Foam Control: Engineered to minimize micro-foam formation during high-speed applications.
Compatibility: Integrates easily into formulations.

Specifications

Technical Highlights

Chemical Identity: Polyether-modified polydimethylsiloxane surfactant, optimized for high HLB stability in demanding aqueous environments.
Active Content: Consists of 100% active matter, providing extreme efficiency at very low addition levels.
Physicochemical Properties: Clear to slightly hazy liquid appearance with a viscosity ranging from 100–500 mPa·s.
Solubility Profile: Highly soluble in water and polar organic solvents, ensuring easy incorporation during the let-down stage.
Dosage Efficiency: Effective at concentrations between 0.1% and 1.0% based on total formulation weight.
Chemical Stability: Exhibits excellent thermal and mechanical stability within standard industrial paint manufacturing and storage conditions over extended periods.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Water-borne Industrial Coatings: Ideal for automotive OEM and refinish sectors where high-gloss, defect-free surfaces are required.
Wood Coatings: Enhances penetration on porous surfaces and prevents “picture framing” in high-end furniture lacquers.
Printing Inks: Improves dot gain and adhesion in water-based flexographic and gravure inks on various filmic substrates.
Adhesives and Sealants: Ensures uniform distribution of pressure-sensitive adhesives on low-energy plastic liners and release papers.
Overprint Varnishes: Provides clarity and leveling for paper packaging.
Plastic Coatings: Enables effective wetting on ABS, PC, and PVC materials used in modern electronics, consumer goods, and various home appliances.