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Highly reactive aliphatic trimer-based curing agent for fast ambient or low-bake crosslinking.
Excellent compatibility with hydroxyl-functional acrylics, polyesters, and alkyd resins.
Low volatile organic compound (VOC) content, supporting sustainable coating formulations.
Superior yellowing resistance and UV stability in clear and pigmented topcoats.
Consistent reactivity profile across batch-to-batch production, ensuring formulation reproducibility.
Automotive OEM clearcoats and refinish coatings.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring rapid cure and durability.
High-performance wood finishing systems for furniture and cabinetry.
Plastic coatings requiring flexibility and adhesion on ABS and PC substrates.
| Chemical Type | Aliphatic isocyanurate trimer (HDI-based) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt%) | 18.5–19.2% |
| Viscosity (25°C, mPa·s) | 1,200–1,600 |
| Specific Gravity (25°C) | 1.18–1.22 |
| Flash Point (Cleveland Open Cup, °C) | 175–182 |
| Storage Stability (unopened, 25°C) | ≥12 months |
Q1: What is the primary function of BG-550TB in coating and adhesive formulations?
A: BG-550TB is a trimer-based curing agent designed to react with hydroxyl- or amine-functional resins—such as polyols or polyamines—to form highly crosslinked, thermally stable networks. It enhances hardness, chemical resistance, and cure speed, especially in ambient- or low-bake systems.
Q2: Is BG-550TB compatible with waterborne systems?
A: Yes, BG-550TB demonstrates good compatibility with many waterborne polyurethane dispersions (PUDs) and hybrid acrylic-polyurethane systems. Its hydrophobic trimer structure allows for controlled reactivity and reduced sensitivity to moisture during storage, though formulation stability should be verified under actual processing conditions.
Q3: How does BG-550TB compare to conventional HDI or IPDI trimers in terms of pot life and film formation?
A: BG-550TB offers extended pot life relative to standard aliphatic isocyanate trimers due to its sterically hindered and tailored trimer architecture. This enables improved working time without sacrificing final film performance—delivering balanced surface dryness, through-cure, and mechanical integrity in demanding applications.
Q4: What safety and handling precautions are recommended for BG-550TB?
A: As with all isocyanate-containing materials, BG-550TB requires handling in well-ventilated areas with appropriate PPE—including nitrile gloves, chemical-resistant goggles, and respiratory protection when aerosol or vapor exposure is possible. Avoid contact with skin, eyes, and moisture; store in tightly sealed containers under dry, cool conditions away from humidity and strong oxidizers.
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E-mail: wangxingqiang@ericwchem.com
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