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High molecular weight acrylic resin delivering excellent film hardness and scratch resistance.
Low VOC content, compliant with stringent environmental regulations for industrial coatings.
Outstanding UV stability and weatherability for long-term gloss and color retention.
Good compatibility with common crosslinkers (e.g., melamine and polyisocyanate systems).
Optimized rheology for high-solids formulations with low viscosity and excellent flow leveling.
Automotive OEM clearcoats and topcoats.
Industrial maintenance coatings for metal substrates.
High-performance coil coatings for architectural and appliance applications.
Powder coating binders requiring enhanced durability and gloss.
UV-curable hybrid systems where thermal and photochemical curing are combined.
| Chemical Type | Thermoplastic acrylic copolymer |
| Product Form | Liquid solution in aromatic hydrocarbon solvent |
| Appearance | Clear, pale yellow liquid |
| Solids Content (wt %) | 60 ± 1 |
| Acid Value (mg KOH/g) | 5 – 8 |
| Viscosity (mPa·s, 25°C) | 4,500 – 6,500 |
| Glass Transition Temperature (Tg, °C) | 75 – 80 (determined by DSC) |
| VOC Content (g/L) | ≤ 550 |
Q1: What is the primary function of PM381N in coating formulations?
A: PM381N is a reactive acrylic resin designed to act as a rheology modifier and performance enhancer—improving sag resistance, leveling, and film integrity in solventborne and high-solids industrial coatings without significantly increasing viscosity at low shear.
Q2: Is PM381N compatible with common crosslinkers used in thermosetting systems?
A: Yes, PM381N is formulated to be compatible with standard amino resins (e.g., melamine-formaldehyde), polyisocyanates, and other conventional crosslinkers used in baked or ambient-cure coatings—supporting robust network formation and enhanced mechanical properties.
Q3: How should PM381N be incorporated into a coating formulation?
A: It is typically added during the let-down stage under moderate agitation. Pre-dilution in a compatible solvent or resin medium is recommended for optimal dispersion. Avoid high-shear mixing that may degrade its macromolecular structure.
Q4: Does PM381N contribute to UV stability in finished coatings?
A: As an acrylic-based resin with inherent backbone stability, PM381N supports improved resistance to UV-induced degradation when used in conjunction with appropriate UV absorbers and HALS stabilizers—though it is not itself a primary UV stabilizer.
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