Features: HDI Trimer, 120°C Deblock, Free NCO ≤0.2%, 75% Solids
Application: Can&Coil Coatings, Adhesives for Flexible Packaging
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| Parameter | Value |
|---|---|
| Product Type | HDI Trimer — Solvent-based Blocked Polyisocyanate |
| Solid Content | 75.0 ± 2.0% |
| Valid NCO | 10.8 ± 0.5% |
| Free NCO | ≤ 0.2% |
| Viscosity | 3500 ± 1500 mPa·s at 25°C |
| Deblocking Temperature | 120°C |
Specifications are based on Dongsen’s current approved product data source. Final formulation and processing conditions should be validated in the customer’s actual system.
DXB-3375C is a solvent-based blocked HDI trimer crosslinker for heat-curable one-component systems. It can be evaluated in the following application areas:
For heat-curable automotive coating formulations where a blocked polyisocyanate crosslinker is required.
For industrial metal coil coating formulations processed through controlled coating and baking lines.
For exterior coating formulations applied to metal food-packaging containers. This application statement does not constitute a direct-food-contact or regulatory-compliance claim.
For textile ink and adhesive-printing formulations that use a controlled heat-curing process.
Dongsen’s solvent-based blocked polyisocyanate range has real application experience in packaging-can and tinplate coating projects. These family-level references support the application direction but are not presented as DXB-3375C-specific performance guarantees.
Final suitability depends on the resin system, formulation, application process and actual curing conditions. Product-specific technical validation is required.
Consider DXB-3375C when a formulation requires a solvent-based blocked HDI trimer crosslinker and its confirmed 120°C deblocking profile fits the available heat-curing process.
The listed deblocking temperature is a product-selection parameter, not a complete curing schedule. Resin compatibility, catalyst compatibility, coating thickness, oven temperature and actual residence time should be validated in the customer’s formulation and production process.
When the available bake window does not fit DXB-3375C, other Dongsen solvent-based blocked HDI trimer grades may be reviewed rather than assuming direct substitution. Grade selection should be based on the actual formulation and curing window.
Dongsen can review the customer’s resin system, target application and baking conditions to support grade selection and sample evaluation.
The current approved Technical Data Sheet for DXB-3375C is not yet published on this page. Contact Dongsen to request current technical documentation, samples, quotations or grade-selection support.
What applications can DXB-3375C be evaluated for?
Current application directions include automotive coatings, metal coil coatings, food-can exterior coatings, and textile printing ink or adhesive-printing systems that use controlled heat curing.
Can DXB-3375C be evaluated for food-can coatings?
DXB-3375C can be evaluated for food-can exterior coating formulations. Final system performance and market-specific regulatory requirements must be assessed separately. This statement does not claim direct-food-contact approval.
How should the curing window be selected?
DXB-3375C has a confirmed 120°C deblocking temperature. The actual production window must also consider the resin system, formulation, coating thickness, catalyst compatibility, oven temperature and residence time.
Can the same formulation be used across automotive, coil and textile applications?
No universal formulation is implied. Each application should be validated separately because the resin, substrate, film requirements and processing conditions may differ.
Are other blocked grades available for different process windows?
Yes. Dongsen offers related solvent-based blocked polyisocyanate grades for further formulation and bake-window evaluation. Related grades include DXB-3370G and DXB-3375D.
