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High chemical resistance to solvents, acids, and alkalis in cured coatings.
Excellent hardness and scratch resistance for durable protective finishes.
Low viscosity enabling high solids content formulations with good flow and leveling.
Outstanding weathering stability and UV resistance for long-term outdoor performance.
Compatible with melamine formaldehyde crosslinkers for thermoset powder and liquid coating systems.
Industrial coil coatings for pre-painted metal (PPM) applications.
High-performance appliance coatings for refrigerators, washing machines, and ovens.
Powder coatings for architectural aluminum profiles and façade components.
Automotive under-hood and non-structural exterior parts coatings.
General-purpose corrosion-resistant protective coatings for metal substrates.
| Chemical Type | Saturated polyester resin |
| Product Form | Pale yellow to light amber viscous liquid |
| Appearance | Clear, homogeneous liquid at 25 °C |
| Primary Applications | Thermoset powder coatings, coil coatings, liquid baking finishes |
| Key Features | High crosslink density, low volatile organic compound (VOC) potential |
| Benefits | Enhanced durability, excellent film formation, and compatibility with standard curing agents |
| Storage Stability | Stable for ≥12 months at ≤25 °C in sealed containers |
Q1: What is the primary application area for DYNAPOL LH 318?
A: DYNAPOL LH 318 is specifically designed as a low-viscosity, high-solids saturated polyester resin for use in high-performance coil coating and can coating systems, where excellent flow, leveling, and crosslinking efficiency with melamine-formaldehyde resins are required.
Q2: Is DYNAPOL LH 318 compatible with common crosslinkers used in industrial coatings?
A: Yes — it is formulated to react efficiently with standard amino resins, particularly melamine-formaldehyde types, under conventional baking conditions. Compatibility with other crosslinkers (e.g., urea-formaldehyde or blocked isocyanates) should be verified experimentally based on formulation goals.
Q3: How does DYNAPOL LH 318 contribute to film performance in cured coatings?
A: It delivers balanced mechanical properties including good flexibility, hardness, and chemical resistance after curing. Its molecular design supports strong adhesion to metal substrates and enhances resistance to chipping, abrasion, and humidity-induced degradation in demanding end-use environments.
Q4: What solvent systems is DYNAPOL LH 318 typically supplied in, and how should it be handled during formulation?
A: It is commonly supplied in aromatic and/or ketonic solvent blends to ensure optimal stability and handling. As with all polyester resins, proper mixing, temperature control, and avoidance of moisture contamination during formulation are recommended to maintain reactivity and shelf life.
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E-mail: wangxingqiang@ericwchem.com
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