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Highly flexible and impact-resistant cured film with excellent elongation properties.
Outstanding adhesion to diverse substrates including metals, plastics, and composites.
Low-VOC formulation compliant with stringent environmental and workplace safety standards.
Fast ambient-cure capability without requiring heat or catalysts for standard applications.
Excellent chemical resistance to oils, solvents, and mild alkaline solutions.
Protective coatings for automotive underbody and chassis components.
Flexible encapsulants for electronic modules and sensor housings.
Industrial elastomeric linings for material handling equipment.
Sealants and gasketing compounds in HVAC and appliance manufacturing.
Reinforced composite matrix resin for lightweight structural parts.
| Chemical Type | Aromatic polyurethane pre-polymer system |
| Product Form | Two-component liquid (Part A: pre-polymer; Part B: amine-terminated curative) |
| Appearance | Part A: amber viscous liquid; Part B: pale yellow low-viscosity liquid |
| Primary Applications | Protective coatings, flexible encapsulation, elastomeric sealants |
| Key Features | Room-temperature cure, high flexibility, substrate versatility |
| Benefits | Reduced energy consumption, simplified processing, durable service life |
| Storage Stability | 12 months at 15–25°C in unopened original containers |
Q1: What is the primary function of AL-540B in polyurethane systems?
A: AL-540B is a reactive polyurethane resin designed to serve as a chain extender and crosslinking agent, enhancing mechanical strength, abrasion resistance, and thermal stability in thermosetting PU coatings, adhesives, and elastomers.
Q2: Is AL-540B compatible with aromatic and aliphatic isocyanates?
A: Yes — AL-540B exhibits broad compatibility with both aromatic (e.g., MDI, TDI derivatives) and aliphatic (e.g., HDI, IPDI-based) isocyanates, making it suitable for formulations requiring UV stability or high reactivity depending on system design.
Q3: How should AL-540B be handled and stored to maintain performance?
A: Store in tightly sealed containers under dry, cool conditions (below 30 °C), protected from moisture and direct sunlight. Precautions against humidity exposure are recommended, as AL-540B contains active hydroxyl groups sensitive to ambient water vapor.
Q4: Can AL-540B be used in solvent-free or high-solids PU formulations?
A: Yes — AL-540B is formulated to support low-viscosity, high-solids, and solvent-free systems. Its molecular architecture contributes to favorable processing characteristics without compromising final film integrity or crosslink density.
Q5: What types of substrates does AL-540B-enhanced PU typically adhere well to?
A: Formulations containing AL-540B generally achieve strong adhesion to metals, plastics (including PVC and polyolefins with appropriate surface treatment), and cured concrete — particularly where chemical resistance and long-term bond durability are required.
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E-mail: wangxingqiang@ericwchem.com
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