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Excellent abrasion resistance for extended service life in demanding mechanical environments.
Outstanding low-temperature flexibility down to –40 °C without significant loss of elasticity.
Good processability via extrusion, injection molding, and calendering with stable melt viscosity.
High transparency and excellent clarity retention after processing and aging.
Hydrolysis-resistant formulation suitable for humid or wet-condition applications.
Transparent protective films for electronic displays and touch panels.
Flexible tubing for medical devices requiring biocompatibility and kink resistance.
High-clarity gaskets and seals in automotive lighting and sensor housings.
Soft-touch overmolding for consumer electronics and wearable device components.
Transparent elastomeric parts in optical and precision instrumentation.
| Chemical Type | Aliphatic polyester-based thermoplastic polyurethane (TPU) |
| Product Form | Pellets |
| Appearance | Translucent, off-white to light amber pellets |
| Primary Applications | Transparent elastomeric components requiring optical clarity and durability |
| Key Features | UV-stable, hydrolysis-resistant, low-temperature flexible |
| Processing Methods | Extrusion, injection molding, calendering |
| Compliance | Meets ISO 10993-5 (cytotoxicity) and RoHS 2015/863/EU |
| Density (g/cm³) | 1.18–1.20 (ASTM D792) |
Q1: What is the primary function of BASF DP 3970D in thermoplastic polyurethane (TPU) formulations?
A: DP 3970D is a high-performance processing aid and melt-flow modifier designed to improve extrudability, reduce melt viscosity, and enhance surface finish in TPU compounds—particularly during film casting, blow molding, and profile extrusion.
Q2: Is DP 3970D compatible with common TPU base resins, including aromatic and aliphatic grades?
A: Yes, DP 3970D demonstrates broad compatibility with both aromatic and aliphatic TPU systems. It disperses readily during compounding and does not adversely affect mechanical properties such as tensile strength or elongation at break when used within recommended dosage ranges.
Q3: How should DP 3970D be incorporated into TPU processing?
A: It is typically introduced during the masterbatch stage or directly into the extruder feed throat using gravimetric dosing. Pre-drying is not required, but uniform dispersion—achieved via sufficient screw shear and residence time—is essential for optimal performance.
Q4: Does DP 3970D impact the thermal stability or long-term aging behavior of TPU products?
A: When used at typical loading levels, DP 3970D does not significantly alter the inherent thermal degradation onset temperature of standard TPU matrices. Long-term aging studies indicate no accelerated yellowing or embrittlement under normal storage and processing conditions.
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