描述
Santoprene 121-85M100 is a black, UV-stabilized thermoplastic vulcanizate (TPV) from Celanese developed for difficult injection molding applications requiring improved flow and good part surface appearance.
Celanese identifies this grade as a high-flow Santoprene TPV and lists injection molding and multi-injection molding as its primary processing methods. It is especially useful for complex part geometries where a conventional higher-viscosity elastomer may be more difficult to fill.
The current Celanese Materials Database describes Santoprene 121-85M100 as a polyolefin-based TPV combining good physical properties with chemical resistance. The grade is also shear dependent, which means its apparent melt viscosity decreases as the shear rate increases.
That rheological behavior is important during injection molding. Higher shear generated through screw speed, injection speed and gate geometry can improve melt flow without relying only on higher melt temperature.
Celanese lists the grade for exterior trims and spoilers, sealing applications, and applications requiring improved part surface appearance.
The material has a current Shore A hardness of approximately 89. The grade name contains “85,” but the current Celanese datasheet reports Shore A 89 under ISO 48-4 / ISO 868. For specification work, the current datasheet value should be used rather than interpreting the grade designation as the exact current hardness value.
Current mechanical data for Santoprene 121-85M100 includes approximately 5.36 MPa tensile stress at 100% elongation, 7.28 MPa tensile stress at break, 390% elongation at break and 33 kN/m tear strength.
These values position the material as a relatively firm TPV that still maintains significant elastomeric extension.
Low-temperature brittleness is approximately -52°C, supporting exterior and automotive use in cold environments.
Compression set is approximately 49% at 70°C for 24 hours and 76% at 125°C for 70 hours according to the current ISO-based Celanese data.
The material density is approximately 0.910 g/cm³, making it significantly lighter than many conventional rubber and engineering-polymer systems.
The grade is also UV stabilized or stable to weather, a useful feature for exterior automotive trim, spoilers and exposed sealing components.
UL recognition is listed under QMFZ2.E80017 and QMFZ8.E80017, with an HB flammability rating at 1.1 mm.
Current automotive references include General Motors GMW15812P-TPV(EPDM+PP)-Type 8M, Mercedes-Benz DBL5562, Renault FRM 18-27-118 special-part approval context, Stellantis/Chrysler MS-AR-100 DMV Black and Volkswagen Group VW 50123.
For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.
For Celanese’s current TPV portfolio, see the Official Celanese Santoprene & Geolast Product Finder →.
Key Features of Santoprene 121-85M100
| Feature | Engineering Benefit |
|---|---|
| High Flow | Supports difficult-to-fill and complex injection-molded geometries |
| Shore A 89 | Provides a firm elastomeric response while retaining TPV flexibility |
| UV Stabilized / Weather Stable | Supports exterior and weather-exposed applications |
| 390% Elongation at Break | Maintains significant flexibility at relatively high hardness |
| 7.28 MPa Stress at Break | Provides useful tensile strength for technical molded parts |
| 33 kN/m Tear Strength | Helps resist tearing around edges, ribs and thin sections |
| Improved Surface Appearance | Suitable for visible automotive exterior and trim parts |
| Good Chemical Resistance | Supports many automotive and industrial environments |
| Shear-Dependent Flow | Higher shear reduces apparent viscosity and improves filling |
| Injection Molding | Designed for fast and easy molding of demanding geometries |
| Multi-Injection Molding | Supports selected multi-material molding concepts |
| UL Recognized | Celanese lists E80017 component recognition |
| Low Density | Approx. 0.910 g/cm³ supports lightweight component design |
| Manufacturing-Stream Recyclability | Polyolefin-based TPV can be recycled within controlled manufacturing streams |
The defining advantage of Santoprene 121-85M100 is its combination of high flow, high hardness, UV stability and improved molded surface quality.
Typical Applications for Santoprene 121-85M100
Santoprene 121-85M100 is primarily aimed at injection-molded automotive and sealing applications.
| Application Area | Typical Use |
|---|---|
| Automotive Exterior Trim | Visible exterior elastomeric trim requiring UV stability |
| Spoilers | Injection-molded spoiler components and flexible trim sections |
| Seals & Gaskets | Firm TPV sealing parts |
| Complex Injection-Molded Parts | Thin, long or difficult-to-fill geometries |
| Visible Molded Components | Parts where improved surface appearance is important |
| Under-Hood Components | Selected elastomeric parts requiring chemical resistance |
| Exterior Protective Components | Weather-exposed flexible parts |
| Multi-Material Moldings | Selected multi-injection applications |
The strongest application fit is where high-flow molding and appearance are required together with UV resistance and elastomeric performance.
Typical Properties of Santoprene 121-85M100
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 910 kg/m³ / 0.910 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 89 | 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 |
| Special Characteristic | High Flow | Celanese Materials Database |
| Weathering Characteristic | UV stabilized / weather stable | Celanese Materials Database |
The current hardness value is Shore A 89. The “85” in the grade designation should not be used as a substitute for the current datasheet hardness value.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation, Perpendicular | 5.36 MPa | ISO 37 |
| Tensile Stress at Break, Perpendicular | 7.28 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break, Perpendicular | 390% | ISO 527-1/-2 or ISO 37 |
| Tear Strength, Normal | 33 kN/m | ISO 34-1 |
| Brittleness Temperature | -52°C | ASTM D746 |
| Low-Temperature Brittleness | -52°C | ISO 812 |
| Compression Set, 70°C / 24 h | 49% | ISO 815 |
| Compression Set, 125°C / 70 h | 76% | ISO 815 |
These values confirm that Santoprene 121-85M100 is a relatively firm TPV with useful tensile, tear and elongation performance for molded technical parts.
Heat Aging Performance
| Property | Condition | Change |
|---|---|---|
| Tensile Strength | 150°C / 168 h | +3% |
| Tensile Strain at Break | 150°C / 168 h | -24% |
| Shore A Hardness | 150°C / 168 h | +1 |
The current Celanese data therefore shows limited change in tensile strength and hardness after the specified heat-aging exposure, with a larger reduction in elongation.
Flammability
| Property | Typical Value | Test Method |
|---|---|---|
| Burning Behavior | HB | IEC 60695-11-10 |
| Thickness Tested | 1.1 mm | IEC 60695-11-10 |
| UL Recognition | Yes | UL 94 |
| UL File | QMFZ2.E80017 / QMFZ8.E80017 | UL Component Recognition |
This is not positioned as a flame-retardant TPV. Its primary value is high-flow injection molding, surface quality, UV stability and automotive use.
Automotive OEM References for Santoprene 121-85M100
Current Celanese grade data lists the following automotive references:
| OEM | Specification / Reference |
|---|---|
| General Motors | GMW15812P-TPV(EPDM+PP)-Type 8M |
| Mercedes-Benz | DBL5562 |
| Renault | FRM 18-27-118 / special-part approval context |
| Stellantis / Chrysler | MS-AR-100 DMV Black |
| Volkswagen Group | VW 50123 |
These references strengthen the positioning of Santoprene 121-85M100 for automotive exterior, sealing and molded technical applications.
Why Choose Santoprene 121-85M100?
The main reason to choose Santoprene 121-85M100 is its improved flow for easier processability.
Celanese’s official Santoprene Product Finder places the 121-M100 grades in a family designed around improved flow.
This is particularly valuable when molding:
- Long flow paths
- Thin sections
- Complex ribs
- Detailed surface features
- Multi-cavity molds
- Parts where incomplete filling is a concern
- Visible parts requiring good molded appearance
The grade’s Shore A 89 hardness makes it firmer than many common Santoprene sealing grades.
That higher hardness can help parts retain shape and provide stronger dimensional support while still maintaining 390% elongation.
Its UV-stabilized / weather-stable formulation makes the grade more suitable for exterior trim and spoiler applications than a TPV without dedicated weathering positioning.
The 33 kN/m tear strength is useful for molded parts with thin edges or stressed mounting features.
The current automotive references also make the grade easier to evaluate for Tier 1 and OEM-related programs where documented material history matters.
For applications where a standard-flow grade is difficult to fill, Santoprene 121-85M100 can provide a useful processability advantage without abandoning the rubber-like behavior of TPV.
Processing Guidelines for Santoprene 121-85M100
Santoprene 121-85M100 is currently listed for:
- Injection molding
- Multi-injection molding
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% |
| Optimum Melt Temperature | 215°C |
| Minimum Melt Temperature | 195°C |
| Maximum Melt Temperature | 240°C |
| Optimum Mold Temperature | 30°C |
| Minimum Mold Temperature | 10°C |
| Maximum Mold Temperature | 50°C |
| Recommended Screw Speed | 100–200 rpm |
| Holding Pressure | Approx. 50–75% of actual injection pressure |
| Optional Back Pressure | Approx. 0.3–0.7 MPa |
The grade-specific melt window of 195–240°C should be the primary starting point for process development.
Celanese also provides a broader Santoprene TPV family processing window of approximately 175–230°C.
Shear-Dependent Flow Behavior
Santoprene TPV has relatively high apparent viscosity at low shear rates.
As shear rate increases, viscosity decreases. Celanese notes that increasing temperature alone has relatively little effect on melt viscosity compared with increasing shear.
For Santoprene 121-85M100, this means that:
- Smaller gates can increase shear
- Higher screw speed can improve melt homogeneity
- Higher injection speed can improve flow
- Gate design strongly influences filling
- Excessive reliance on melt-temperature increases may not be the best flow solution
This shear-thinning behavior is one reason the grade can perform well in complex injection-molded geometries.
Back Pressure and Holding Pressure
Celanese recommends holding pressure at approximately 50–75% of the actual injection pressure.
Back pressure is not always required, but approximately 0.3–0.7 MPa may be used to improve melt homogeneity and shot consistency.
Higher back pressure may be useful when masterbatch is added.
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
Injection-molding equipment should therefore be properly purged when changing between these materials and Santoprene 121-85M100.
Santoprene 121-85M100 vs. Santoprene 121-75M100
| Feature | Santoprene 121-85M100 | Santoprene 121-75M100 |
|---|---|---|
| Material Family | TPV | TPV |
| Color | Black | Black |
| Special Positioning | Improved flow | Improved flow |
| Shore A Hardness | 89 | 80 |
| Elongation at Break | 390% | 441% |
| Tensile Stress at Break | 7.3 MPa | 6.6 MPa |
| Tensile Stress @ 100% | 5.4 MPa | 3.8 MPa |
| Main Selection Difference | Higher hardness and tensile stress | Softer with higher elongation |
The comparison values above follow the current Celanese Santoprene Product Finder.
Choose Santoprene 121-85M100 when the application needs a firmer high-flow TPV with higher tensile stress.
Choose Santoprene 121-75M100 when a softer high-flow grade with greater elongation is preferred.
Related Products
Santoprene 121-75M100 – Black high-flow TPV with approximately Shore A 80 hardness for easier processing and more compliant molded parts.
Santoprene 121-62M100 – Softer black M100 high-flow TPV with approximately Shore A 67 hardness.
Santoprene 121-80 – General-purpose black TPV for automotive and industrial elastomeric applications.
View More TPV Thermoplastic Vulcanizates →
Technical Documents for Santoprene 121-85M100
| Document Type | Description |
|---|---|
| TDS | Current Celanese Materials Database physical, mechanical and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| Automotive Specification Information | GM, Mercedes-Benz, Renault, Stellantis and VW references |
| Santoprene Product Finder | Grade comparison and M100 family positioning |
| Processing Guide | Injection-molding process guidance |
| COA | Batch-specific quality information where available |
Need technical documents for Santoprene 121-85M100?
📧 Email: ruiqingchem@gmail.com
📝 Online form: Contact Us →
Please state Santoprene 121-85M100 and the required document type when submitting your inquiry.
FAQ About Santoprene 121-85M100
Q1: What is Santoprene 121-85M100?
Santoprene 121-85M100 is a black, UV-stabilized, high-flow TPV from Celanese designed for difficult injection molding, exterior trim, spoilers and sealing applications.
Q2: What is the hardness of Santoprene 121-85M100?
The current Celanese datasheet lists approximately Shore A 89.
Q3: Why does the grade name say 85 if the hardness is 89A?
The grade designation should not be treated as the exact current hardness specification. The current Celanese Materials Database lists Shore A 89, which is the value that should be used for current technical comparison.
Q4: Is Santoprene 121-85M100 a high-flow TPV?
Yes. Celanese lists High Flow as a special characteristic, and its Product Finder positions the M100 family as offering improved flow for easier processability.
Q5: What is the elongation at break?
Current data lists approximately 390% elongation at break.
Q6: What is the tear strength?
The current tear strength is approximately 33 kN/m.
Q7: Is Santoprene 121-85M100 UV resistant?
Yes. Current Celanese data identifies it as UV stabilized or stable to weather.
Q8: What applications are recommended?
Typical applications include automotive exterior trim, spoilers, seals, gaskets and difficult injection-molded parts requiring improved surface appearance.
Q9: What processing temperature should be used?
Current grade-specific data lists 195–240°C melt temperature, with an optimum around 215°C.
Q10: What is the difference between Santoprene 121-85M100 and 121-75M100?
Both are black high-flow M100 TPV grades. 121-85M100 is harder and has higher tensile stress, while 121-75M100 is softer and has greater elongation.
Request Santoprene 121-85M100 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 121-85M100, please provide:
- Required quantity
- Destination country or port
- Automotive or industrial application
- Exterior trim, spoiler, seal, gasket or molded-part design
- Required Shore hardness
- Surface appearance requirement
- UV / outdoor exposure
- Chemical exposure
- Minimum service temperature
- Injection-molding machine information
- Part dimensions and wall thickness
- Flow-length or difficult-fill concern
- OEM specification requirement
- TDS, SDS, UL or COA requirement
- Sample requirement, if applicable
📧 Email: ruiqingchem@gmail.com
📝 Send Inquiry →
