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Highly reactive amino-functional silicone with primary and secondary amine groups for enhanced covalent bonding to substrates.
Excellent compatibility with epoxy, polyurethane, and acrylic resin systems for seamless formulation integration.
Provides superior substrate adhesion, flexibility, and thermal stability in cured polymer matrices.
Low viscosity liquid enables easy handling, metering, and homogeneous dispersion without solvent dilution.
Designed for industrial-scale production with consistent batch-to-batch performance and regulatory compliance (REACH, RoHS).
Adhesion promoters in automotive sealants and structural adhesives.
Surface modifiers for glass fiber sizing and composite reinforcement coatings.
Functional additives in high-performance epoxy encapsulants for electronics packaging.
Compatibilizers in silicone-modified thermoset resins for aerospace composites.
Hybrid crosslinkers in UV-curable and heat-curable coating systems.
| Chemical Type | Amino-functional polydimethylsiloxane (PDMS) with terminal and pendant amine groups |
| Product Form | Clear, colorless to pale yellow liquid |
| Appearance | Homogeneous, low-viscosity fluid |
| Primary Applications | Adhesion promotion, resin modification, surface functionalization |
| Key Features | Amine reactivity, hydrophobicity, thermal stability up to 200 °C |
| Benefits | Improved interfacial bonding, reduced delamination, enhanced mechanical durability |
| Storage Conditions | Store in original sealed container at 5–30 °C; protect from moisture and strong oxidizers |
| Regulatory Status | Compliant with REACH Annex XIV (non-SVHC), RoHS Directive 2011/65/EU |
Q1: What is the primary functional role of DOWSIL 2-8566 in formulations?
A: DOWSIL 2-8566 is an amino-functional silicone fluid designed primarily to enhance substrate adhesion, improve surface compatibility, and serve as a reactive modifier in silicone-based coatings, sealants, and specialty elastomer systems.
Q2: Is DOWSIL 2-8566 compatible with common organic resins and crosslinking systems?
A: Yes — it demonstrates good compatibility with epoxy, polyurethane, acrylic, and polyester resin systems, and can participate in reactions with isocyanates, epoxies, and other electrophilic curing agents due to its primary amine functionality.
Q3: How should DOWSIL 2-8566 be incorporated into a formulation for optimal performance?
A: It is typically added during the late-stage mixing phase under moderate shear and ambient to mildly elevated temperatures; dosage depends on formulation requirements but generally ranges from 0.1% to 2% by weight relative to total solids.
Q4: Does DOWSIL 2-8566 require special handling or storage conditions?
A: Store in tightly sealed containers at room temperature, protected from moisture and strong oxidizing agents; avoid prolonged exposure to high humidity or elevated temperatures to preserve amine reactivity and shelf life.
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