描述
Santoprene 203-50 is a hard, colorable and versatile thermoplastic vulcanizate from Celanese designed for general-purpose extrusion and molding applications requiring significantly higher stiffness than conventional soft TPV materials.
The grade belongs to the Santoprene 203 family and combines the processability of a thermoplastic with the durability and flexibility associated with vulcanized elastomers.
Santoprene 203-50 has a typical hardness of approximately 51 Shore D, placing it at the hard end of the Santoprene TPV range.
Current Celanese material data lists a typical yield stress of 12 MPa and a yield strain of approximately 31%. This mechanical profile makes the grade useful for technical components requiring a firm elastomeric response rather than the soft feel normally associated with lower-hardness Shore A TPV grades.
The material also provides approximately 96 kN/m tear strength, which gives Santoprene 203-50 strong resistance to edge tearing, crack propagation and localized mechanical damage.
Excellent ozone resistance is specifically listed as one of the key features of the grade.
Santoprene 203-50 also combines good physical properties and chemical resistance for use across automotive, industrial, appliance, consumer and electrical applications.
The current Celanese data lists a typical brittleness temperature of approximately -28°C, supporting moderate low-temperature applications.
Santoprene 203-50 can be processed using conventional thermoplastic equipment by injection molding, multi-injection molding, extrusion, sheet extrusion, coextrusion, blow molding and thermoforming.
Because the material is natural and colorable, it is also suitable for parts requiring application-specific colors or visual identification.
Santoprene 203-50 is polyolefin based, and Celanese states that it can be recycled within the manufacturing stream.
For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.
For the current Celanese TPV portfolio, see the Official Celanese Santoprene & Geolast Product Finder →.
Key Features of Santoprene 203-50
| Feature | Engineering Benefit |
|---|---|
| Shore D 51 | Provides very high stiffness for a TPV elastomer |
| Natural / Colorable | Supports customized product colors |
| 12 MPa Yield Stress | Provides strong mechanical support under load |
| 31% Yield Strain | Retains useful deformation capability despite high hardness |
| 96 kN/m Tear Strength | Strong resistance to tearing and crack propagation |
| Excellent Ozone Resistance | Supports automotive and outdoor applications |
| Good Chemical Resistance | Useful in demanding industrial environments |
| -28°C Brittleness Temperature | Supports moderate low-temperature service |
| UL Recognized | Current Celanese material data references E80017 |
| Injection Molding + Extrusion | Broad thermoplastic processing capability |
| Blow Molding / Thermoforming | Supports hollow and shaped technical parts |
| Polyolefin-Based TPV | Combines elastomeric behavior with thermoplastic processing |
| Manufacturing-Stream Recyclability | Allows controlled processing scrap recovery |
The strongest reason to select Santoprene 203-50 is its combination of very high hardness, strong tear resistance, good mechanical support and thermoplastic processing flexibility.
Typical Applications for Santoprene 203-50
Santoprene 203-50 is suitable for general-purpose technical applications requiring a hard TPV.
| Application Area | Typical Use |
|---|---|
| Automotive Components | Hard elastomeric parts requiring ozone resistance |
| Under-Hood Components | Technical parts exposed to heat and environmental aging |
| Seals & Gaskets | Firm sealing components |
| Protective Covers | High-strength elastomeric housings |
| Plugs & Grommets | Mechanical and cable protection |
| Extruded Profiles | Hard flexible profiles |
| Industrial Components | Tough elastomeric technical parts |
| Electrical Components | Protective and insulating parts |
| Appliance Components | Molded and extruded technical parts |
| Consumer Products | Firm resilient components |
| Color-Coded Parts | Natural-base parts requiring pigmentation |
| Blow-Molded Components | Selected hollow technical parts |
| Thermoformed Parts | Shaped high-hardness TPV components |
The grade is particularly useful when a design requires greater rigidity and tear resistance than conventional Shore A TPV materials.
Typical Properties of Santoprene 203-50
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 950 kg/m³ / 0.950 g/cm³ | ISO 1183 |
| Shore D Hardness, 15 s | 51 | ISO 48-4 / ISO 868 |
| Resin Identification | TPV | ISO 1043 |
| Part Marking Code | >TPV< | ISO 11469 |
| Product Form | Pellets | Manufacturer information |
| Color | Natural / Colorable | Manufacturer information |
The 51 Shore D hardness places Santoprene 203-50 among the hardest conventional general-purpose Santoprene grades.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Yield Stress, Perpendicular | 12 MPa | ISO 527-1/-2 or ISO 37 |
| Yield Strain, Perpendicular | 31% | ISO 527-1/-2 or ISO 37 |
| Tear Strength | 96 kN/m | ISO 34-1 |
| Brittleness Temperature | -28°C | ASTM D746 |
| Low-Temperature Brittleness | -28°C | ISO 812 |
| Compression Set, 70°C / 24 h | 59% | ISO 815 |
| Compression Set, 125°C / 70 h | 74% | ISO 815 |
These values show that Santoprene 203-50 is optimized more toward hardness, tear resistance and structural support than toward very soft sealing behavior.
Thermal Properties
| Property | Typical Value | Test Method |
|---|---|---|
| RTI Electrical, 1.5 mm | 85°C | UL 746B |
| RTI Electrical, 3.0 mm | 85°C | UL 746B |
| RTI Strength, 1.5 mm | 85°C | UL 746B |
| RTI Strength, 3.0 mm | 85°C | UL 746B |
Current Celanese data also reports approximately -18% change in tensile strength, -26% change in tensile strain at break, and approximately -1 Shore D change after 168 hours at 150°C.
Electrical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Relative Permittivity @ 60 Hz | 2.3 | IEC 62631-2-1 |
| Comparative Tracking Index | PLC 0 | UL 746A |
| Arc Resistance Performance Level | PLC 5 | UL 746B |
| Electric Strength, Short Time, 2 mm | 35 kV/mm | ASTM D149 |
| High-Amperage Arc Ignition, 1.5 mm | PLC 0 | UL 746A |
These properties provide useful design information for protective electrical components, insulation applications and technical molded parts.
Flammability & Application Suitability
| Property | Typical Value / Rating | Standard |
|---|---|---|
| Burning Behavior @ 1.5 mm | HB | IEC 60695-11-10 |
| Burning Behavior @ 1.0 mm | HB | IEC 60695-11-10 |
| UL Recognition | Yes | UL 94 |
| Hot Wire Ignition @ 1.5 mm | PLC 3 | UL 746A |
| Hot Wire Ignition @ 3.0 mm | PLC 1 | UL 746A |
| Detergent Resistance | f3 | UL 749 |
| Detergent Resistance | f4 | UL 2157 |
The grade is UL recognized under Celanese file references QMFZ2.E80017 and QMFZ8.E80017.
Automotive OEM Reference for Santoprene 203-50
Current Celanese material data lists the following automotive specification reference:
| OEM | Specification / Reference |
|---|---|
| Volkswagen Group | VW 50123 |
This makes Santoprene 203-50 particularly relevant for automotive component suppliers evaluating a high-hardness TPV platform.
Why Choose Santoprene 203-50?
The main reason to choose Santoprene 203-50 is its position at the very hard end of the Santoprene general-purpose TPV range.
At approximately 51 Shore D, the material provides substantially greater stiffness than Shore A TPV grades.
Its approximately 12 MPa yield stress provides strong mechanical support.
The approximately 96 kN/m tear strength gives the material particularly strong resistance to tearing and localized mechanical damage.
Excellent ozone resistance supports automotive, outdoor and industrial applications where atmospheric exposure is important.
The material also offers thermoplastic manufacturing advantages compared with traditional vulcanized rubber because it does not require a separate curing step during normal molding or extrusion.
Injection molding, extrusion, blow molding and thermoforming can all be used depending on part design.
The natural / colorable base provides additional flexibility for product appearance and identification.
For customers requiring a hard, colorable 51 Shore D TPV with high tear strength and broad thermoplastic processability, Santoprene 203-50 is an important grade to evaluate.
Processing Guidelines for Santoprene 203-50
Santoprene 203-50 can be processed by:
- Injection molding
- Multi-injection molding
- Extrusion
- Sheet extrusion
- Coextrusion
- Blow molding
- Thermoforming
Current Celanese processing data confirms these processing methods.
Current Grade-Specific Injection Conditions
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Recommended | Yes |
| Drying Temperature | 80°C |
| Drying Time | ≥3 hours in a dehumidified dryer |
| Processing Moisture Content | ≤0.08% |
| Maximum Regrind Level | 20% |
| Optimum Melt Temperature | 220°C |
| Minimum Melt Temperature | 205°C |
| Maximum Melt Temperature | 230°C |
| Optimum Mold Temperature | 30°C |
| Minimum Mold Temperature | 10°C |
| Maximum Mold Temperature | 50°C |
The current grade-specific injection window is approximately 205–230°C, with an optimum melt temperature of approximately 220°C.
Injection Molding Notes
Celanese recommends holding pressure at approximately 50–75% of actual injection pressure.
A relatively high screw speed of approximately 100–200 rpm is recommended.
Back pressure is not always necessary, but approximately 0.3–0.7 MPa can be used to improve melt homogeneity and shot consistency.
Higher back pressure may be useful when processing masterbatch.
Processors should optimize:
- Injection speed
- Screw speed
- Holding pressure
- Back pressure
- Gate size
- Runner design
- Venting
- Melt temperature
- Mold temperature
- Cooling time
- Part shrinkage
- Surface finish
Extrusion Conditions
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Temperature | 82°C |
| Drying Time | 3 hours |
| Melt Temperature Reference | 210°C |
For extrusion, optimize:
- Barrel temperature profile
- Adapter temperature
- Die temperature
- Screw speed
- Melt pressure
- Draw-down
- Cooling
- Profile dimensions
- Surface quality
Shear-Dependent Flow
Santoprene 203-50 is strongly shear dependent.
Its melt viscosity is relatively high at low shear rates and decreases as shear rate increases.
Celanese also notes that increasing temperature has comparatively little effect on TPV melt viscosity, while smaller gates and higher shear rates can help improve flow.
Material Compatibility
Santoprene TPV is incompatible with acetal (POM) and PVC.
Processing equipment should be thoroughly purged when changing between these materials and Santoprene 203-50.
Related Products
We supply a broad range of Santoprene TPV grades for different hardness, color, extrusion, molding and application requirements.
Typical Santoprene product families include:
- Santoprene 101 Series
- Santoprene 103 Series
- Santoprene 201 Series
- Santoprene 203 Series
- Santoprene automotive grades
- Santoprene extrusion grades
- Santoprene sealing grades
- Santoprene specialty TPV grades
View More TPV Thermoplastic Vulcanizates →
If you are unsure which Santoprene grade fits your project, send us your required hardness, processing method, service temperature, color and application requirements.
Technical Documents for Santoprene 203-50
| Document Type | Description |
|---|---|
| TDS | Current physical, mechanical, thermal, electrical and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| Automotive Specification Information | Volkswagen Group VW 50123 reference |
| Santoprene Product Finder | Celanese grade portfolio and positioning |
| Processing Guide | Injection molding, extrusion and related processing guidance |
| COA | Batch-specific quality information where available |
Need technical documents for Santoprene 203-50?
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FAQ About Santoprene 203-50
Q1: What is Santoprene 203-50?
Santoprene 203-50 is a hard, natural and colorable general-purpose thermoplastic vulcanizate from Celanese designed for molding and extrusion applications.
Q2: What is the hardness of Santoprene 203-50?
The current typical hardness is approximately 51 Shore D.
Q3: Is Santoprene 203-50 Shore A 50?
No. The current published hardness is approximately 51 Shore D. The “50” in the grade name should not be interpreted as Shore A 50.
Q4: What is the yield stress?
The current typical yield stress is approximately 12 MPa.
Q5: What is the yield strain?
The current typical yield strain is approximately 31%.
Q6: What is the tear strength?
Current grade data lists approximately 96 kN/m tear strength.
Q7: What is the low-temperature performance?
The current brittleness temperature is approximately -28°C.
Q8: What is the compression set?
Current values are approximately 59% at 70°C / 24 h and 74% at 125°C / 70 h.
Q9: Is Santoprene 203-50 resistant to ozone?
Yes. Excellent ozone resistance is specifically listed as a key feature of this grade.
Q10: Is Santoprene 203-50 UL recognized?
Yes. Current Celanese data lists UL recognition under files QMFZ2.E80017 and QMFZ8.E80017.
Q11: Can Santoprene 203-50 be injection molded?
Yes. Injection molding and multi-injection molding are listed processing methods.
Q12: Can Santoprene 203-50 be extruded?
Yes. Extrusion, sheet extrusion and coextrusion are supported.
Q13: Does Santoprene 203-50 need drying?
Yes. Current processing guidance recommends approximately 80°C for at least 3 hours in a dehumidified dryer.
Q14: What injection melt temperature is recommended?
Current grade-specific guidance lists approximately 220°C optimum, with a range of approximately 205–230°C.
Q15: What extrusion temperature is recommended?
Current extrusion guidance lists approximately 210°C as the melt temperature reference.
Q16: Is Santoprene 203-50 colorable?
Yes. Santoprene 203-50 is a hard, colorable TPV grade.
Request Santoprene 203-50 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 203-50, please provide:
- Required quantity
- Destination country or port
- Automotive, industrial, appliance or consumer application
- Seal, profile, protective part or molded-component design
- Required Shore hardness
- Required color
- Continuous and peak operating temperature
- Minimum service temperature
- Compression-set requirement
- Chemical or fluid exposure
- Outdoor / ozone exposure
- Injection-molding, extrusion, blow-molding or thermoforming process
- OEM specification requirement
- UL documentation requirement
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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