BASF Efka 4009 is a modified polyurethane dispersant that prevents floating/flooding while enhancing color strength and gloss in solvent-based coatings. It reduces viscosity and processing time for both inorganic and organic pigments.
Color Control - Prevents floating/flooding and improves uniformity
Process Efficiency - Reduces grinding time by 30-50%
Surface Enhancement - Boosts gloss and finish quality
Pigment Versatility - Works with all pigment types
Cost Advantage - Replaces traditional dispersants effectively
Industrial Coatings - For high-performance protective systems
Automotive Finishes - Enhances OEM/refinish coating quality
Floor Systems - Improves abrasion resistance and shine
Coil Coatings - Optimizes weather resistance
Chemical Name | Modified Polyurethane |
Appearance | Clear to Slightly Hazy Yellow Liquid |
Brand | EFKA |
Model | EFKA-4009 |
Active Content | 59-61% |
Solvent | Butyl Acetate/Methoxypropyl Acetate/Isobutanol |
Acid Value | 10-17 mg KOH/g DIN 53402 |
Amine Value | 8-15 mg KOH/g DIN 16945 |
Color | ≤5 ISO 4630 |
Packaging | 25kg/drum |
Origin | Netherlands |
Q1: What types of pigments and fillers is Efka 4009 especially effective for?
A: Efka 4009 is particularly effective for stabilizing high-surface-area inorganic pigments (e.g., titanium dioxide, iron oxides) and functional fillers (e.g., silica, calcium carbonate) in polyurethane dispersion (PUD) systems, where steric hindrance and colloidal stability are critical.
Q2: Can Efka 4009 be used in both anionic and non-ionic PUDs?
A: Yes — Efka 4009 is compatible with a broad range of polyurethane dispersions, including anionic, non-ionic, and hybrid PUD systems, thanks to its tailored polyurethane backbone and hydrophilic-lipophilic balance designed for aqueous polymer environments.
Q3: How should Efka 4009 be incorporated into the formulation?
A: It is typically added during the pigment grinding or let-down stage, either pre-diluted in water or directly to the aqueous phase. Good mechanical agitation ensures uniform distribution and optimal wetting performance.
Q4: Does Efka 4009 impact film formation or final coating properties?
A: When used at recommended dosage levels, Efka 4009 does not interfere with film coalescence or negatively affect key end-use properties such as gloss, hardness, or adhesion — it remains largely non-migrating and integrated within the dispersed phase.
Q5: Is Efka 4009 suitable for low-VOC or zero-NMP formulations?
A: Yes — Efka 4009 is supplied as a ready-to-use aqueous dispersion and contains no NMP, APEOs, or regulated solvents, supporting formulators in developing environmentally compliant, low-VOC polyurethane coatings and inks.
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