描述
Santoprene 121-80 is a black, UV-resistant thermoplastic vulcanizate (TPV) from Celanese designed for demanding general-purpose applications requiring a combination of rubber-like elasticity, outdoor durability and thermoplastic processing.
Celanese describes the grade as a soft black UV-resistant TPV that combines good physical properties and chemical resistance for use across a wide range of applications.
One of the most important characteristics of Santoprene 121-80 is its enhanced UV resistance. The current grade data specifically states that the material is designed for improved UV resistance, while also providing excellent ozone resistance and excellent flex-fatigue resistance.
This makes the grade particularly relevant for automotive seals, exterior and under-hood components, outdoor profiles, bellows, grommets, boots, flexible housings and other parts exposed to sunlight, weathering or repeated movement.
The current Celanese Materials Database lists a Shore A hardness of approximately 85.
This is an important point for grade selection: the “80” in the commercial grade designation should not automatically be interpreted as the current measured Shore A value. The current Celanese data sheet reports Shore A 85 after 15 seconds.
Mechanical performance is strong for a flexible TPV. Santoprene 121-80 has approximately 11 MPa tensile stress at break, approximately 4.6 MPa tensile stress at 100% elongation, and approximately 560% elongation at break.
The very high elongation allows the material to undergo substantial deformation while maintaining elastomeric behavior.
Low-temperature performance is also strong. The current brittleness temperature is approximately -59°C, making the grade suitable for cold-weather automotive, industrial and outdoor applications.
Compression set is approximately 25% at 23°C for 24 hours and 52% at 125°C for 70 hours.
The grade also carries f1 outdoor suitability under UL 746C, which is particularly relevant to its UV-resistant positioning.
Current Celanese data lists detergent-resistance ratings of f3 under UL 749 and f4 under UL 2157.
Thermal capability includes approximately 135°C continuous upper temperature resistance for 1,000 hours under SAE J2236.
Santoprene 121-80 is UL recognized under Celanese file references QMFZ2.E80017 and QMFZ8.E80017.
Current flammability data lists HB at 1.0 mm and 1.5 mm, with an ISO 3795 / FMVSS 302 burning rate of approximately 23.1 mm/min at 2 mm thickness.
The grade is shear dependent and can be processed using conventional thermoplastics equipment for injection molding, extrusion, blow molding, thermoforming and vacuum forming.
It is polyolefin based and Celanese states that Santoprene TPV is recyclable within the manufacturing stream.
For more TPV materials, visit our TPV Thermoplastic Vulcanizates Product Category →.
For additional manufacturer information, visit the Official Celanese Santoprene TPV Product Page →.
Key Features of Santoprene 121-80
| Feature | Engineering Benefit |
|---|---|
| Improved UV Resistance | Supports outdoor and sunlight-exposed applications |
| Outdoor Suitability f1 | Documented suitability for outdoor use under UL 746C |
| Excellent Ozone Resistance | Useful for automotive and weather-exposed parts |
| Excellent Flex-Fatigue Resistance | Supports repeated bending and cyclic deformation |
| Shore A 85 | Firmer elastomeric behavior for seals, boots and technical components |
| 560% Elongation at Break | High flexibility despite relatively high hardness |
| 11 MPa Stress at Break | Strong mechanical performance for a TPV |
| -59°C Brittleness Temperature | Supports cold-weather service |
| Detergent Resistance f3 / f4 | Broadens appliance and technical application suitability |
| UL Recognized | Current Celanese documentation references E80017 |
| Injection Molding + Extrusion | Broad conventional thermoplastic processability |
| Blow Molding / Thermoforming | Supports hollow and shaped flexible components |
| Polyolefin Based | Low density and practical process handling |
| Manufacturing-Stream Recyclability | Supports controlled recycling of production scrap |
The defining advantage of Santoprene 121-80 is the combination of high elongation, improved UV stability, ozone resistance and outdoor suitability.
Typical Applications for Santoprene 121-80
Santoprene 121-80 is suitable for automotive, outdoor, industrial, appliance and consumer applications.
| Application Area | Typical Use |
|---|---|
| Automotive Seals & Gaskets | Weather-exposed and technical sealing components |
| Exterior Automotive Parts | Flexible components requiring UV and ozone resistance |
| Under-Hood Components | Boots, covers, ducts and protective elastomeric parts |
| Bellows & Boots | Repeated-flex protective components |
| Grommets & Plugs | Sealing and protection around cables, holes and fittings |
| Air-Management Components | Flexible ducts, couplings and interfaces |
| Outdoor Sealing Profiles | Weather-resistant extruded profiles |
| Industrial Seals | Flexible seals requiring strong mechanical durability |
| Flexible Tubing | Tubes for compatible service environments |
| Appliance Components | Molded and extruded flexible parts |
| Electrical Components | Protective elastomeric parts with documented electrical data |
| Consumer Products | Flexible housings and resilient components |
The grade is especially attractive where the part must retain flexibility while exposed to sunlight, ozone, cold temperatures and repeated movement.
Typical Properties of Santoprene 121-80
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 970 kg/m³ / 0.970 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 85 | ISO 48-4 / ISO 868 |
| Resin Identification | TPV | ISO 1043 |
| Part Marking Code | >TPV< | ISO 11469 |
| Color | Black | Manufacturer information |
| Product Form | Pellets | Manufacturer information |
The grade designation contains “80,” but the current Celanese data reports an actual Shore A hardness of 85. For technical selection, use the current TDS value rather than inferring hardness from the grade name.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation, Perpendicular | 4.6 MPa | ISO 37 |
| Tensile Stress at Break, Perpendicular | 11 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break, Perpendicular | 560% | ISO 527-1/-2 or ISO 37 |
| Brittleness Temperature | -59°C | ASTM D746 |
| Low-Temperature Brittleness | -59°C | ISO 812 |
| Compression Set, 23°C / 24 h | 25% | ISO 815 |
| Compression Set, 125°C / 70 h | 52% | ISO 815 |
The combination of 560% elongation and 11 MPa stress at break provides a strong balance between flexibility and mechanical strength.
Thermal Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Continuous Upper Temperature Resistance, 1000 h | 135°C | SAE J2236 |
| RTI Electrical, 1.5 mm | 90°C | UL 746B |
| RTI Electrical, 3.0 mm | 90°C | UL 746B |
| RTI Strength, 1.5 mm | 90°C | UL 746B |
| RTI Strength, 3.0 mm | 95°C | UL 746B |
These values support long-term use in automotive and industrial applications where moderate elevated-temperature exposure is expected.
Electrical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Relative Permittivity @ 60 Hz | 2.6 | IEC 62631-2-1 |
| Electric Strength, Short Time, 2 mm | 28 kV/mm | ASTM D149 |
| Arc Resistance Performance Level | PLC 6 | UL 746B |
| High-Amperage Arc Ignition, 1.5 mm | PLC 0 | UL 746A |
The electrical data can be useful when Santoprene 121-80 is evaluated for cable-protection, insulating or electrical-component applications.
Flammability & Application Suitability
| Property | Typical Value / Rating | Standard |
|---|---|---|
| Burning Behavior @ 1.0 mm | HB | IEC 60695-11-10 |
| Burning Behavior @ 1.5 mm | HB | IEC 60695-11-10 |
| Burning Rate @ 2 mm | 23.1 mm/min | ISO 3795 / FMVSS 302 |
| UL Recognition | Yes | UL 94 |
| Detergent Resistance | f3 | UL 749 |
| Detergent Resistance | f4 | UL 2157 |
| Outdoor Suitability | f1 | UL 746C |
The grade is not a dedicated flame-retardant TPV. Its primary strengths are UV resistance, ozone resistance, mechanical durability and outdoor performance.
Why Choose Santoprene 121-80?
The main reason to choose Santoprene 121-80 is its combination of outdoor durability and high elastomeric performance.
Many general-purpose elastomers perform well indoors but may gradually lose properties when exposed to ultraviolet radiation, ozone, heat and repeated flexing.
This grade is specifically designed for improved UV resistance and also carries an f1 outdoor-suitability rating.
The Shore A 85 hardness gives the material more support than softer 60A or 70A Santoprene grades.
This can be useful for boots, grommets, exterior seals and technical components that must maintain geometry while still bending or stretching.
The approximately 560% elongation at break means the material remains highly deformable despite its relatively high hardness.
The 11 MPa stress at break provides useful strength for components exposed to mechanical loading.
Flex-fatigue resistance is important for bellows, boots, ducts and seals that move repeatedly during service.
Ozone resistance is valuable for automotive and outdoor parts because ozone can cause cracking in susceptible elastomers.
The -59°C brittleness temperature supports use in cold climates and low-temperature transportation applications.
Thermoplastic processing is another major advantage. Santoprene 121-80 can be molded or extruded on conventional thermoplastics equipment without the separate curing cycle required by traditional vulcanized rubber.
For customers requiring a black, UV-resistant, approximately 85 Shore A TPV for automotive or outdoor use, Santoprene 121-80 is a strong grade to evaluate.
Processing Guidelines for Santoprene 121-80
Santoprene 121-80 can be processed by:
- Injection molding
- Multi-injection molding
- Extrusion
- Profile extrusion
- Sheet extrusion
- Coextrusion
- Blow molding
- Thermoforming
- Vacuum forming
Current Processing Data
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Temperature | 82°C |
| Drying Time | 3 hours in a dehumidified dryer |
| Maximum Regrind Level | 20% |
| Back Pressure | 0.517 MPa |
| Extrusion Melt Temperature Reference | 202°C |
| General Santoprene TPV Processing Window | 175–230°C |
Celanese recommends desiccant drying for approximately 3 hours at about 80–82°C before processing.
The current data also gives an extrusion melt-temperature reference of approximately 202°C.
Shear-Dependent Flow Behavior
Santoprene 121-80 is a shear-dependent TPV.
As shear rate increases, apparent melt viscosity decreases. This means processing behavior can be strongly influenced by:
- Screw speed
- Injection speed
- Gate geometry
- Back pressure
- Die design
- Melt temperature
- Mold temperature
- Venting
- Cooling time
Increasing temperature alone may not provide the same flow improvement as increasing and controlling shear.
Regrind
Current Celanese data lists a maximum regrind level of approximately 20%.
Actual regrind use should still be controlled according to application requirements, appearance, OEM specifications and contamination risk.
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
Processing equipment should be thoroughly purged when changing between POM or PVC and Santoprene 121-80.
Santoprene 121-80 vs. Santoprene 121-87
| Feature | Santoprene 121-80 | Santoprene 121-87 |
|---|---|---|
| Material Family | TPV | TPV |
| Color | Black | Black |
| Product Positioning | UV-resistant / general-purpose | Higher-hardness UV-black TPV |
| Shore A Hardness | 85 | Approx. 93 |
| Elongation at Break | 560% | Approx. 600% |
| Tensile Stress at Break | 11 MPa | Approx. 15.2 MPa |
| Tensile Stress @ 100% Elongation | 4.6 MPa | Approx. 6.8 MPa |
| UV / Outdoor Focus | Yes | Yes |
| Main Selection Difference | More compliant | Harder and stronger |
Choose Santoprene 121-80 when a UV-resistant TPV with somewhat greater compliance is preferred.
Choose Santoprene 121-87 when the application requires a firmer, higher-strength material within the same general UV-black TPV family.
Related Products
Santoprene 121-73W175 – Automotive TPV for weatherseal and technical sealing applications.
Santoprene 121-79W233 – Specialized black TPV in the 121 automotive / weathering family.
Santoprene 121-87 – Higher-hardness black TPV for applications requiring greater strength and stiffness.
View More TPV Thermoplastic Vulcanizates →
Technical Documents for Santoprene 121-80
| Document Type | Description |
|---|---|
| TDS | Current Celanese physical, mechanical, thermal, electrical and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| Santoprene Product Finder | Celanese grade comparison and application positioning |
| Processing Guide | Injection molding, extrusion and blow-molding guidance |
| COA | Batch-specific quality information where available |
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FAQ About Santoprene 121-80
Q1: What is Santoprene 121-80?
Santoprene 121-80 is a black UV-resistant TPV from Celanese designed for general-purpose automotive, industrial and outdoor applications.
Q2: What is the hardness of Santoprene 121-80?
The current Celanese data lists approximately Shore A 85, even though the commercial grade designation contains “80.”
Q3: What is the elongation at break?
Current data lists approximately 560% elongation at break.
Q4: What is the tensile stress at break?
The current value is approximately 11 MPa.
Q5: Is Santoprene 121-80 suitable for outdoor use?
Yes. Celanese describes the grade as designed for improved UV resistance and lists outdoor suitability f1 under UL 746C.
Q6: What is its low-temperature performance?
The current brittleness temperature is approximately -59°C.
Q7: What is the compression set?
Current Celanese data lists approximately 25% at 23°C / 24 h and 52% at 125°C / 70 h.
Q8: Can Santoprene 121-80 be injection molded and extruded?
Yes. The grade can be processed by injection molding, extrusion, blow molding, thermoforming and vacuum forming.
Q9: What processing temperature is recommended?
Celanese gives a broad Santoprene TPV processing window of approximately 175–230°C and an extrusion melt-temperature reference of approximately 202°C for this grade.
Q10: What is the difference between Santoprene 121-80 and 121-87?
Both are black TPV grades with outdoor / UV positioning. 121-80 is softer at Shore A 85, while 121-87 is approximately Shore A 93 and provides higher tensile stress.
Request Santoprene 121-80 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 121-80, please provide:
- Required quantity
- Destination country or port
- Automotive, industrial, appliance or outdoor application
- Seal, gasket, boot, tube, profile or molded-part design
- Required Shore hardness
- UV / outdoor exposure requirement
- Ozone exposure
- Continuous and peak operating temperature
- Minimum service temperature
- Compression-set requirement
- Chemical or fluid exposure
- Injection-molding, extrusion, blow-molding or thermoforming process
- UL or OEM documentation requirement
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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