描述
Santoprene 121-75M100 is a soft, black, UV-resistant thermoplastic vulcanizate (TPV) from Celanese designed for fast and easy injection molding, especially in difficult or complex part geometries.
This grade belongs to the Santoprene 121 series, a family that includes materials engineered for more specialized processing and end-use requirements than the basic general-purpose 101 series.
Celanese specifically identifies Santoprene 121-75M100 for glass encapsulation applications, sealing applications and parts requiring improved surface appearance.
The grade is therefore particularly useful where a standard TPV may provide acceptable mechanical properties but does not fill a complex mold quickly enough or does not produce the desired molded surface quality.
One of the most important characteristics of Santoprene 121-75M100 is its improved flow for easier processability. Celanese’s Santoprene product finder places this grade in the M100 family and explicitly identifies improved flow as the key differentiating feature.
The material is shear dependent. As shear rate increases during injection molding, its apparent melt viscosity decreases. This behavior helps the material flow through gates, runners and thin or complex sections when the injection process is properly optimized.
The current Celanese Materials Database describes the grade as suitable for difficult injection molding applications and notes that it can be processed on conventional thermoplastic injection-molding equipment.
The grade has a current Shore A hardness of approximately 80, which makes it a relatively firm elastomer while still retaining substantial rubber-like deformation.
Current Celanese data lists approximately 441% elongation at break, 6.59 MPa stress at break, 3.79 MPa stress at 100% elongation and approximately 25.5 kN/m tear strength.
This combination allows Santoprene 121-75M100 to provide good structural support while maintaining enough flexibility for sealing lips, encapsulated edges and complex molded elastomeric components.
Low-temperature performance is also strong. The current brittleness temperature is approximately -60°C according to ASTM D746 and ISO 812-related testing.
Compression-set values are approximately 28% at 23°C, 42% at 70°C for 24 hours and 55% at 125°C for 70 hours.
The grade is also UL recognized. Current Celanese documentation references QMFZ2.E80017 for the United States and QMFZ8.E80017 for Canada.
Its current UL 94 burning behavior is HB at 1.1 mm.
The material density is approximately 0.920 g/cm³, giving it a relatively low specific gravity compared with many conventional rubber systems.
Because it is polyolefin based, Celanese states that the material is recyclable within the manufacturing stream, subject to normal manufacturing controls.
For more TPV materials, 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 121-75M100
| Feature | Engineering Benefit |
|---|---|
| Improved Flow | Easier filling of difficult and complex injection-molded geometries |
| Shore A 80 | Firmer elastomeric response for seals and encapsulated components |
| UV Resistant | Supports applications exposed to sunlight or outdoor conditions |
| Glass Encapsulation Grade | Specifically identified by Celanese for glass encapsulation |
| Fast Injection Molding | Designed for efficient molding cycles and complex parts |
| Improved Surface Appearance | Useful where molded appearance is an important quality requirement |
| 441% Elongation at Break | Maintains high flexibility despite higher hardness |
| 25.5 kN/m Tear Strength | Supports durable edges and sealing features |
| -60°C Brittleness Temperature | Strong low-temperature flexibility |
| Good Chemical Resistance | Suitable for many automotive and industrial environments |
| UL Recognized | Current Celanese documentation lists E80017 |
| Manufacturing-Stream Recyclability | Controlled process scrap can be recyclable within production |
The defining advantage of Santoprene 121-75M100 is not simply its 80 Shore A hardness. Its main value is improved flow for fast, difficult injection molding combined with high elastomeric performance.
Typical Applications for Santoprene 121-75M100
Santoprene 121-75M100 is particularly suitable for injection-molded parts requiring reliable filling, strong surface quality and elastomeric sealing performance.
| Application Area | Typical Use |
|---|---|
| Glass Encapsulation | Molded elastomer around automotive or technical glass edges |
| Automotive Glass Seals | Flexible sealing interfaces around glass assemblies |
| Complex Injection-Molded Seals | Parts with thin sections, ribs, lips and difficult flow paths |
| Gaskets | Molded sealing components requiring 80A hardness |
| Weather-Sealing Components | UV-resistant elastomeric parts exposed to outdoor conditions |
| Automotive Sealing Parts | Components requiring OEM-qualified TPV materials |
| Fuel-Tank Sealing Bellows | Application context referenced in current VW/Škoda approval data |
| Technical Covers & Boots | Flexible molded protection components |
| Industrial Seals | Durable molded elastomeric interfaces |
| Appearance-Critical Molded Parts | Components where surface quality is important |
The grade is especially attractive where mold filling is difficult and a conventional higher-viscosity TPV could create short shots, poor surface replication or excessive injection pressure.
Typical Properties of Santoprene 121-75M100
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 920 kg/m³ / 0.920 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 80 | 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 |
| UV Resistance | Yes | Manufacturer positioning |
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Stress at 100% Elongation | 3.79 MPa | ISO 527-1/-2 or ISO 37 |
| Stress at Break | 6.59 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break | 441% | ISO 527-1/-2 or ISO 37 |
| Shear Modulus | 12.9 MPa | ISO 6721 |
| Tear Strength | 25.5 kN/m | ISO 34-1 |
| Brittleness Temperature | -60°C | ASTM D746 |
| Low-Temperature Brittleness | -60°C | ISO 812 |
| Compression Set at 23°C | 28% | ISO 815 |
| Compression Set at 70°C / 24 h | 42% | ISO 815 |
| Compression Set at 125°C / 70 h | 55% | ISO 815 |
Heat-Aging Performance
| Property | Typical Change | Condition |
|---|---|---|
| Tensile Strength Change | -16% | 150°C / 168 h |
| Elongation at Break Change | -27% | 150°C / 168 h |
| Shore A Hardness Change | +3 | 150°C / 168 h |
Flammability
| Property | Typical Value | Test Method |
|---|---|---|
| Burning Behavior | HB | UL 94 |
| Thickness Tested | 1.1 mm | UL 94 |
| UL Recognition | Yes | UL 94 |
| UL File | QMFZ2.E80017 / QMFZ8.E80017 | UL |
Automotive OEM References for Santoprene 121-75M100
Current Celanese Materials Database information lists multiple automotive specification references for Santoprene 121-75M100:
| OEM / Group | Specification / Reference |
|---|---|
| Stellantis – Chrysler | MS-AR-100 CMV |
| General Motors | GMW15812, Type 7M |
| Mercedes-Benz Group | DBL 5562 |
| Stellantis – FCA Group | 55248/02 EMP-80 |
| Geely | Q/JLY J7110166B |
| Hyundai | MS220-05, Type L |
| Li Auto | Q/LiA5310057 2021 (V2) |
| MAN | M3236 A7 |
| SAIC Motor | SMTC 5 320 024 |
| Volkswagen Group | TL 526 22 MD06 |
| Volkswagen Group | VW50123 |
| Stellantis – PSA Group | PMP 01378_15_01959 |
These references make Santoprene 121-75M100 especially relevant to automotive suppliers evaluating a known TPV platform for glass encapsulation, sealing and complex molded components.
Why Choose Santoprene 121-75M100?
The main reason to choose Santoprene 121-75M100 is its improved flow behavior.
Higher-hardness TPV grades can become more difficult to fill in molds with long flow paths, thin sealing lips or complicated geometries.
A material that provides the required hardness but does not fill the part reliably can cause short shots, weld-line problems, surface defects, high injection pressure and inconsistent dimensions.
Santoprene 121-75M100 is specifically designed to improve this processability.
Its shear-dependent flow behavior allows the apparent viscosity to decrease as shear increases during injection.
This makes the grade well suited to high-speed injection molding and complex molds.
Glass encapsulation is a particularly important application. In these parts, the TPV must flow accurately around a glass perimeter, fill detailed mold features and produce an acceptable visible surface.
Celanese therefore specifically identifies glass encapsulation and improved part surface appearance among the key features of the grade.
At Shore A 80, it is firm enough to support sealing structures while its 441% elongation allows substantial deformation.
The 25.5 kN/m tear strength is useful for narrow lips, corners and edges that could otherwise become tear initiation points.
UV resistance broadens the grade’s usefulness in exterior automotive and weather-exposed applications.
The -60°C brittleness temperature supports low-temperature service.
Its OEM specification history further strengthens its suitability for automotive components.
For customers looking for an 80A black TPV optimized for difficult injection molding, glass encapsulation and high-quality molded surfaces, Santoprene 121-75M100 is a highly targeted grade.
Processing Guidelines for Santoprene 121-75M100
Santoprene 121-75M100 is primarily optimized for injection molding.
Current Grade-Specific Injection Conditions
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Temperature | 82°C |
| Drying Time | 3 h in a dehumidified dryer |
| Processing Moisture Content | ≤0.08% |
| Maximum Regrind Level | 20% |
| Optimum Melt Temperature | 215°C |
| Mold Temperature | 10–52°C |
| Vent Depth | 25 µm |
| Back Pressure | 0.345–0.689 MPa |
| Injection Speed | Fast |
| General Santoprene TPV Processing Window | 175–230°C |
Celanese recommends desiccant drying for approximately 3 hours at 80–82°C before processing.
The general Santoprene TPV processing window is approximately 175–230°C, while the grade-specific optimum melt temperature for Santoprene 121-75M100 is approximately 215°C.
Why Fast Injection Is Recommended
This grade is designed for difficult injection molding and benefits from shear.
Fast injection can increase shear rate, lower apparent melt viscosity, improve thin-section filling, improve replication of detailed mold features and reduce premature freeze-off.
Good venting is also important in high-speed molding because trapped air can produce burns, incomplete filling or surface defects.
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
When changing from POM or PVC to Santoprene 121-75M100, the machine should be thoroughly purged before production.
Santoprene 121-75M100 vs. Santoprene 121-85M100
| Feature | Santoprene 121-75M100 | Santoprene 121-85M100 |
|---|---|---|
| Material Family | TPV | TPV |
| Color | Black | Black |
| M100 Positioning | Improved flow | Improved flow |
| Shore A Hardness | 80 | Approx. 89 |
| Elongation at Break | 441% | Approx. 390% |
| Stress at Break | 6.6 MPa | Approx. 7.3 MPa |
| Stress @ 100% Elongation | 3.8 MPa | Approx. 5.4 MPa |
| Compression Set, 70°C | 42% | Approx. 49% |
| Main Selection Difference | More flexible / lower hardness | Firmer / higher stress |
Both grades are positioned by Celanese as improved-flow M100 TPV grades for easier processability.
Choose Santoprene 121-75M100 when approximately 80 Shore A hardness and greater flexibility are preferred.
Choose Santoprene 121-85M100 when a significantly firmer elastomeric response is required.
Related Products
Santoprene 121-67W175 – Black TPV designed for specialized sealing applications at lower hardness.
Santoprene 121-73W175 – Black TPV with a higher hardness level for sealing and technical applications.
Santoprene 121-85M100 – Higher-hardness M100 grade with improved flow for easier processing.
View More TPV Thermoplastic Vulcanizates →
Technical Documents for Santoprene 121-75M100
| Document Type | Description |
|---|---|
| TDS | Current Celanese physical, mechanical, flammability and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| OEM Approval Information | Automotive specification references from GM, Mercedes-Benz, VW, Hyundai, Stellantis and others |
| Santoprene Product Finder | Celanese grade comparison and application positioning |
| Processing Guide | Injection-molding recommendations |
| COA | Batch-specific quality information where available |
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FAQ About Santoprene 121-75M100
Q1: What is Santoprene 121-75M100?
Santoprene 121-75M100 is a black UV-resistant TPV from Celanese designed for fast, difficult injection molding, glass encapsulation and sealing applications.
Q2: What is the Shore hardness of Santoprene 121-75M100?
The current Celanese value is approximately Shore A 80.
Q3: What is the main advantage of the M100 designation?
Celanese positions the M100 grades around improved flow for easier processability, making them particularly useful for difficult injection-molded parts.
Q4: Is Santoprene 121-75M100 suitable for glass encapsulation?
Yes. Celanese specifically identifies glass encapsulation applications as a key use for this grade.
Q5: What is the elongation at break?
Current Celanese data lists approximately 441% elongation at break.
Q6: What is the tensile stress at break?
The current stress at break is approximately 6.59 MPa.
Q7: How does Santoprene 121-75M100 perform at low temperature?
The brittleness temperature is approximately -60°C under both ASTM and ISO-related testing.
Q8: What is the recommended melt temperature?
The current grade-specific optimum melt temperature is approximately 215°C, while the broader Santoprene TPV processing window is approximately 175–230°C.
Q9: Does Santoprene 121-75M100 need drying?
Yes. Celanese recommends approximately 3 hours at 80–82°C in a dehumidified dryer, with processing moisture content at or below approximately 0.08%.
Q10: What is the difference between Santoprene 121-75M100 and 121-85M100?
Both are improved-flow black M100 TPV grades. 121-75M100 is softer at Shore A 80 and more flexible, while 121-85M100 is approximately Shore A 89 and provides a firmer elastomeric response.
Request Santoprene 121-75M100 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 121-75M100, please provide:
- Required quantity
- Destination country or port
- Automotive, industrial or other application
- Glass encapsulation, sealing or molded-component application
- Required Shore hardness
- Part geometry and wall thickness
- Gate and runner design
- Surface-appearance requirements
- Outdoor / UV exposure
- Continuous and peak operating temperature
- Injection-molding machine information
- OEM specification requirement
- UL documentation requirement
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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