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Highly processable thermoplastic elastomer with excellent melt flow for injection molding and extrusion.
Outstanding resistance to oils, greases, and hydrocarbon-based fluids per API RP 1552 requirements.
Good low-temperature flexibility down to –40 °C without brittle failure.
Non-marking formulation suitable for contact-sensitive sealing surfaces.
Halogen-free and RoHS-compliant compound for environmentally sensitive applications.
Dynamic seals in petroleum and natural gas wellhead equipment.
O-rings and gaskets for API 6A/17D-compliant valves and chokes.
Sealing components in hydraulic control systems for offshore drilling units.
Protective boots and bellows for subsea instrumentation housings.
Custom-molded interface seals in pressure-rated sampling and testing manifolds.
| Chemical Type | Styrenic Thermoplastic Elastomer (TPE-S) |
| Product Form | Pellets |
| Appearance | Opaque black granules |
| Primary Applications | Static and dynamic sealing in oil & gas pressure control equipment |
| Key Features | API RP 1552 compliant; PS-grade performance; non-staining |
| Benefits | Reduced assembly torque; extended service life under cyclic pressure; no sulfur or zinc migration |
| Standard Compliance | Meets API RP 1552 Annex A (PS grade) for seal performance |
| Processing Method | Injection molding, compression molding, and extrusion |
Q1: What is API 1552/PS TPE and how does it differ from conventional plasticizers?
A: API 1552/PS TPE is a high-performance, non-phthalate thermoplastic elastomer modifier designed to enhance flexibility, processability, and low-temperature performance in styrenic TPE formulations. Unlike traditional small-molecule plasticizers, it functions as a polymeric compatibilizer and soft segment enhancer, offering improved permanence, reduced migration, and better mechanical retention over time.
Q2: Is API 1552/PS TPE suitable for food-contact or medical-grade TPE applications?
A: API 1552/PS TPE is formulated without intentionally added phthalates, heavy metals, or known SVHCs, and is commonly selected for sensitive applications where regulatory compliance and extractables control are critical. Final suitability for food-contact or medical use depends on the full formulation, processing conditions, and end-product regulatory assessment — users should conduct appropriate testing and consult applicable regional guidelines.
Q3: How is API 1552/PS TPE typically incorporated into TPE compounds?
A: It is generally introduced during compounding—either pre-blended with the base polymer or fed directly into the extruder—using standard melt-processing equipment. Due to its thermoplastic nature, it exhibits good thermal stability and compatibility with common SBS, SEBS, and TPS-based systems, enabling uniform dispersion without special handling requirements.
Q4: Does API 1552/PS TPE affect the hardness or tensile properties of the final TPE?
A: Yes—its primary function is to reduce compound hardness and improve elongation while maintaining acceptable tensile strength and recovery. The extent of modification depends on loading level and base polymer selection; typical dosage ranges from 0.1% to 2% by weight, with higher loadings yielding greater softening and flexibility enhancement.
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