Features: HDI Trimer, 130–140°C Deblock, Low Free NCO
Application: Can&Coil Coatings, Adhesives for Flexible Packaging
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| Property | Value |
|---|---|
| Product Type | Solvent-based Blocked HDI Trimer |
| Solid Content | 75.0 ± 2.0% |
| Valid NCO | 11.2 ± 0.5% |
| Free NCO | ≤ 0.2% |
| Viscosity | 2500 ± 1000 mPa·s @ 25°C |
| Deblocking Temperature | 130–140°C |
| Standard Carrier | Solvent Naphtha 100 |
Specifications are based on Dongsen’s current approved product data source. Final formulation performance should be validated under the customer’s actual resin, substrate and baking conditions.
Dongsen supplies DXB-3375D as a raw-material polyisocyanate crosslinker for coating formulation. Dongsen does not supply finished paint or finished coated packaging.
Solvent-based blocked polyisocyanates can also be evaluated for other heat-cured coating, ink and adhesive systems, depending on the resin chemistry, activation temperature, substrate and production process.
Application status: Automotive and textile printing / adhesive-printing applications above are solvent-based blocked-polyisocyanate family application directions and are not presented as grade-specific commercial-performance claims for DXB-3375D. Product-specific technical validation is required.
DXB-3375D has been adopted in a commercial metal-packaging coating project using aluminum and iron substrates. The application supports evaluation of DXB-3375D as an HDI-trimer blocked crosslinker for exterior can and container baking-coating formulations.
Evidence status: Commercial application reference. Final suitability must be validated in the customer’s actual resin, pigment system, substrate, bake schedule and downstream processing conditions.
DXB-3375D has also been used in a commercial tinplate metal-decorating application where colored-ink printing was carried out after the coating bake. The reported application supports product discussion where post-bake printing forms part of the customer’s production workflow.
The customer’s actual coating resin, bake cycle, ink chemistry and tinplate substrate should be included in application testing before commercial use.
DXB-3375D has a field-use reference in coated sanitary metal hardware applications.
For reference only. Product-specific technical validation is required. This reference does not establish a universal performance claim or formal Application mapping.
Consider DXB-3375D when a solvent-based blocked HDI-trimer crosslinker with a 130–140°C deblocking range is suitable for the formulation and production bake schedule.
DXB-3375D should be screened with the customer’s actual hydroxyl-functional resin, crosslinker ratio, catalyst system, substrate, coating thickness, peak substrate temperature and dwell time.
For metal decorating, include any downstream printing or forming step in the validation program rather than evaluating cure performance alone.
For automotive baking coatings or textile printing / adhesive-printing systems, confirm the customer’s resin chemistry and bake conditions before treating DXB-3375D as a suitable grade. These directions should be validated individually.
Send Dongsen your resin type, OH value if available, existing crosslinker, addition level, bake temperature and time, substrate, downstream process and target requirement for grade-selection support.
What is DXB-3375D?
DXB-3375D is a solvent-based blocked HDI-trimer polyisocyanate crosslinker for heat-cured 1K formulation systems. Its current deblocking range is 130–140°C.
What are the confirmed applications for DXB-3375D?
Current grade-specific evidence supports can & coil coatings, exterior metal-can coatings and tinplate metal-decorating applications.
Can DXB-3375D be used for food-can coatings?
DXB-3375D has commercial application reference in exterior coating systems for metal packaging including food cans. This does not establish food-contact approval or compliance for a finished coating or package. The complete formulation and packaging structure must be evaluated for the intended market and end use.
Can a DXB-3375D coating be printed after baking?
In one commercial tinplate metal-decorating application, downstream colored-ink printing was successfully included after the coating bake. The customer’s own coating resin, bake cycle, printing ink and substrate should be validated under actual production conditions.
Can it be evaluated for automotive coatings?
Automotive baking coatings are an application direction for solvent-based blocked polyisocyanates. Current evidence should not be interpreted as a universal DXB-3375D automotive-performance claim. Send the resin system, bake schedule, substrate and target requirements to Dongsen for grade-specific screening.
Can it be used in textile printing inks or adhesive-printing systems?
Textile printing inks and thermally activated adhesive-printing systems are broader blocked-polyisocyanate application directions. Product-specific validation is required before DXB-3375D is recommended for a specific textile formulation.
What is the deblocking temperature?
Dongsen’s current approved product data lists a 130–140°C deblocking range for DXB-3375D. Final cure depends on the complete formulation, substrate temperature and dwell time.
How can I request technical data, a sample or grade-selection support?
Contact Dongsen with your resin, application, baking conditions and target requirements so the technical team can review the appropriate grade and testing direction.
