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Allnex ADDITOL XL 6557 is a high-quality special coating additive in Allnex’s ADDITOL® series, specially developed for solvent-based industrial coating systems and a crosslinkable polymer grinding medium. It has the core functions of pigment wetting and dispersion, can reduce the viscosity of pigment paste and improve pigment stability
Excellent electrically neutral properties - Suitable for various ionic coating systems, no compatibility conflicts, strong stability
High-efficiency wetting and dispersion - Improve pigment wettability, reduce flocculation, and enhance dispersion uniformity and stability
Good system compatibility - Good adaptability with various coating resins and additives, without affecting the overall performance of the formula
Excellent coating performance - Enhance coating sag resistance, facilitate construction, and reduce paint film construction defects
Significant appearance optimization - Increase pigment loading, improve paint film texture, and create excellent finished product appearance
Coil and pre-coated metal coatings - Suitable for coil coating process, improve paint film hardness and weather resistance stability
Marine heavy-duty anti-corrosion coatings - Enhance paint film salt spray and water resistance, suitable for harsh marine working conditions
Industrial metal protective coatings - Improve the protection of metal substrates, enhance impact and scratch resistance
Industrial wood coatings - Endow wood paint film with high hardness, inhibit yellowing and maintain appearance consistency
Automotive OEM coatings - Optimize paint film gloss and adhesion, improve the comprehensive performance of vehicle coating
| Series | ADDITOL® Series |
| Chemical Type | Crosslinkable Polymer Grinding Medium |
| Product Form | Pale yellow viscous liquid (25℃, typical value) |
| Ionicity | Non-ionic |
| Solid Content | ≥90% (high solid content, typical value) |
| Density (25℃) | 0.95-0.99g/cm³ (typical value) |
| Viscosity (25℃) | 800-1500mPa·s (typical value) |
| Flash Point (Closed Cup) | ≥120℃ (typical value) |
| Solubility | Soluble in organic solvents |
| Molecular Weight | 5000-15000 g/mol (estimated) |
| pH Value | 6.5-8.5 (typical) |
Q1: What is the primary function of ADDITOL XL 6557 in coating and ink formulations?
A: ADDITOL XL 6557 is a non-ionic polymeric wetting agent designed to reduce surface tension, improve substrate润湿 (wetting), enhance pigment dispersion stability, and support uniform film formation—particularly in low-VOC and high-solids systems.
Q2: Is ADDITOL XL 6557 compatible with waterborne, solventborne, and UV-curable systems?
A: Yes, it demonstrates broad compatibility across waterborne acrylics and polyurethanes, conventional solventborne resins (e.g., alkyds, epoxies, and polyester-based systems), and many free-radical UV-curable formulations—though compatibility should always be verified in the final formulation under application conditions.
Q3: How does ADDITOL XL 6557 differ from conventional low-MW surfactants?
A: Unlike small-molecule surfactants, ADDITOL XL 6557 is a higher-molecular-weight polymeric additive offering reduced migration tendency, improved compatibility with diverse resin matrices, and lower risk of foaming or surface defects such as craters or haze.
Q4: What is the recommended dosage range for optimal performance?
A: Dosage depends on formulation composition, pigment loading, and desired performance attributes, but it is typically used at low concentrations—generally ranging from 0.1% to 2.0% by weight of total formulation—with optimization best achieved through lab-scale trials.
Q5: Does ADDITOL XL 6557 contribute to gloss retention or affect final film hardness?
A: As a polymeric wetting aid, it is not intended to act as a film former or hardener; however, by promoting uniform pigment distribution and interfacial adhesion, it can indirectly support consistent gloss development and minimize defects that might otherwise compromise mechanical film integrity.
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