描述
Santoprene 201-64 is a soft, natural-color, colorable thermoplastic vulcanizate (TPV) from Celanese developed for a wide range of general-purpose elastomer applications.
The grade combines useful mechanical strength and chemical resistance with rubber-like flexibility and thermoplastic processing efficiency. Celanese specifically identifies Santoprene 201-64 as a material that can be processed on conventional thermoplastics equipment by injection molding, extrusion or blow molding.
It is polyolefin based and recyclable within the manufacturing stream.
The current Celanese Product Finder places Santoprene 201-64 in the general-purpose TPV family for extrusion and molding, with the positioning “highest elastomeric properties.”
Unlike black 101-series grades, the 201 series is natural and colorable. This is useful where the finished component must be supplied in a custom color rather than black.
The current Shore A hardness is approximately 69, placing Santoprene 201-64 in the medium-firm elastomer range. It offers more support than lower-hardness grades while still retaining substantial flexibility.
Current Celanese data lists approximately 450% elongation at break, 7.0 MPa tensile stress at break, 2.6 MPa tensile stress at 100% elongation, and approximately 22 kN/m tear strength.
These values give the grade a useful balance of flexibility, strength and resistance to tearing.
Celanese also highlights excellent flex-fatigue resistance and excellent ozone resistance as key grade-level features.
Flex-fatigue resistance is important for parts such as bellows, diaphragms, flexible tubes, seals and components that repeatedly bend or deform during service.
Ozone resistance improves durability in outdoor, automotive and atmospheric-exposure environments where some elastomer systems can crack after long-term exposure.
Low-temperature capability is another important advantage. The current brittleness temperature is approximately -60°C according to both ASTM and ISO low-temperature test references.
Compression-set performance is approximately 25% at 70°C for 24 hours and 44% at 125°C for 70 hours in the current May 2025 Celanese grade data.
For long-term temperature context, Celanese lists 135°C continuous upper temperature resistance for 1,000 hours under SAE J2236.
UL Relative Thermal Index values are 100°C electrical at 1.5 mm and 3.0 mm, 90°C mechanical strength at 1.5 mm, and 95°C mechanical strength at 3.0 mm.
The grade is also UL recognized under Celanese file references QMFZ2.E80017 and QMFZ8.E80017.
Current flammability data lists HB at 1.5 mm and 1.0 mm, plus FMVSS Class B with a burning rate of approximately 20 mm/min at 2 mm thickness.
Santoprene 201-64 is therefore best viewed as a broad-use, natural, colorable 69A TPV with strong elastomeric performance rather than a dedicated flame-retardant material.
For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.
For the current Celanese grade portfolio, see the Official Celanese Santoprene & Geolast Product Finder →.
Key Features of Santoprene 201-64
| Feature | Engineering Benefit |
|---|---|
| Natural / Colorable | Supports custom-colored elastomeric components |
| Shore A 69 | Medium-firm elastomeric response for seals, gaskets and flexible technical parts |
| Excellent Flex-Fatigue Resistance | Supports repeated bending and cyclic deformation |
| Excellent Ozone Resistance | Useful for long-term outdoor and automotive exposure |
| 450% Elongation at Break | Provides high flexibility and deformation capability |
| 7.0 MPa Tensile Stress at Break | Good mechanical strength for a general-purpose TPV |
| 22 kN/m Tear Strength | Supports durable edges, lips and thin sections |
| -60°C Brittleness Temperature | Suitable for cold-weather and low-temperature service |
| Good Chemical Resistance | Useful in a broad range of technical environments |
| UL Recognized | Current Celanese documentation references E80017 |
| Injection Molding + Extrusion | Supports multiple thermoplastic manufacturing routes |
| Blow Molding | Suitable for selected hollow flexible components |
| Manufacturing-Stream Recyclability | Controlled process scrap can be reworked where specification allows |
The strongest value of Santoprene 201-64 is its combination of natural colorability, 69A hardness, strong elastomeric properties and broad processability.
Typical Applications for Santoprene 201-64
Santoprene 201-64 is suitable for a wide range of automotive, appliance, industrial, electrical and consumer applications.
| Application Area | Typical Use |
|---|---|
| Seals & Gaskets | Flexible sealing components requiring good recovery |
| Automotive Plugs & Grommets | Protective and sealing parts |
| Bumpers & Stops | Flexible energy-absorbing components |
| Clips & Flexible Retainers | Resilient technical parts |
| Interior Trim Components | Colorable flexible automotive parts |
| Under-Hood Components | Elastomeric parts requiring ozone and heat resistance |
| Diaphragms | Repeated-flex components |
| Tubing | Flexible technical tubing in compatible fluid environments |
| Appliance Components | Molded and extruded flexible parts |
| Electrical Components | Flexible protective and insulating components |
| Consumer Products | Custom-colored grips, covers and resilient parts |
| Blow-Molded Components | Hollow elastomeric technical parts |
The natural color of Santoprene 201-64 gives designers more freedom where visual appearance matters.
Typical Properties of Santoprene 201-64
Physical & Rheological Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 970 kg/m³ / 0.970 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 69 | ISO 48-4 / ISO 868 |
| Molding Shrinkage – Parallel | 3.2% | ISO 294-4 / 2577 |
| Molding Shrinkage – Normal | 0.8% | ISO 294-4 / 2577 |
| Resin Identification | TPV | ISO 1043 |
| Part Marking Code | >TPV< | ISO 11469 |
| Color | Natural / Colorable | Manufacturer information |
| Delivery Form | Pellets | Manufacturer information |
The current shrinkage values were measured on approximately 2.0 mm specimens at least 24 hours after molding according to Celanese test method TPE-X0080.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation | 2.6 MPa | ISO 37 |
| Tensile Stress at Break | 7.0 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break | 450% | ISO 527-1/-2 or ISO 37 |
| Tear Strength | 22 kN/m | ISO 34-1 |
| Brittleness Temperature | -60°C | ASTM D746 |
| Low-Temperature Brittleness | -60°C | ISO 812 |
| Compression Set, 70°C / 24 h | 25% | ISO 815 |
| Compression Set, 125°C / 70 h | 44% | ISO 815 |
These values show why Santoprene 201-64 is suitable for flexible technical parts requiring both strength and low-temperature toughness.
Thermal Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Continuous Upper Temperature Resistance, 1000 h | 135°C | SAE J2236 |
| RTI Electrical, 1.5 mm | 100°C | UL 746B |
| RTI Electrical, 3.0 mm | 100°C | UL 746B |
| RTI Strength, 1.5 mm | 90°C | UL 746B |
| RTI Strength, 3.0 mm | 95°C | UL 746B |
Heat-Aging Data
Current non-standard Celanese data lists:
| Property Change | Condition | Typical Change |
|---|---|---|
| Tensile Strength | 150°C / 168 h | -12% |
| Tensile Strain at Break | 150°C / 168 h | +6% |
| Shore A Hardness | 150°C / 168 h | +2 points |
These values provide useful context for high-temperature aging behavior.
Flammability & Electrical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| 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 |
| FMVSS Class | B | ISO 3795 / FMVSS 302 |
| Burning Rate @ 2 mm | 20 mm/min | ISO 3795 / FMVSS 302 |
| Relative Permittivity @ 60 Hz | 2.3 | IEC 62631-2-1 |
| Comparative Tracking Index | PLC 0 | UL 746A |
| Arc Resistance Performance Level | PLC 6 | UL 746B |
| High-Amperage Arc Ignition @ 1.5 mm | PLC 0 | UL 746A |
| Hot Wire Ignition @ 1.5 mm | PLC 2 | UL 746A |
| Hot Wire Ignition @ 3.0 mm | PLC 2 | UL 746A |
Specific Application Suitability
| Property | Published Rating | Standard |
|---|---|---|
| Detergent Resistance | f3 | UL 749 |
| Detergent Resistance | f4 | UL 2157 |
These ratings provide additional support for appliance and technical-component evaluations.
Automotive OEM References for Santoprene 201-64
Current Celanese Materials Database data lists several automotive specification references for Santoprene 201-64:
| OEM | Specification / Reference |
|---|---|
| Ford | WSD-M2D379-A1 |
| General Motors | Natural; special parts approval context |
| Stellantis | 55248_02 EMP60 |
| Stellantis | MS-AR-100 BGN |
These references are useful when Santoprene 201-64 is being considered for automotive plugs, seals, grommets, flexible components or custom-colored technical parts.
Why Choose Santoprene 201-64?
One of the most important reasons to choose Santoprene 201-64 is its natural, colorable form.
Many TPV applications require black materials, but appliance, consumer, interior and technical components may require custom colors for identification, styling or assembly control.
The natural base of Santoprene 201-64 supports this design flexibility.
At Shore A 69, the material offers a useful middle ground between softer sealing compounds and harder elastomeric materials.
The approximately 450% elongation at break allows large deformation without sacrificing the mechanical support provided by its 7.0 MPa tensile stress at break.
Excellent flex-fatigue resistance helps components survive repeated motion.
Excellent ozone resistance supports outdoor and automotive exposure.
The -60°C brittleness temperature provides confidence in low-temperature environments.
Compression-set performance makes the grade suitable for seals and gaskets that remain compressed for extended periods.
Thermoplastic processability is another major benefit. Santoprene 201-64 can be injection molded, extruded, coextruded, sheet extruded and blow molded without a conventional rubber vulcanization cycle.
For production operations, the current Celanese grade data also allows up to 20% regrind, subject to application requirements and quality control.
For users seeking a natural, colorable 69A TPV with high elastomeric performance and broad processing capability, Santoprene 201-64 is a strong general-purpose material candidate.
Processing Guidelines for Santoprene 201-64
Santoprene 201-64 supports:
- Injection molding
- Multi-injection molding
- Extrusion
- Sheet extrusion
- Coextrusion
- Blow molding
Injection Molding Conditions
| Processing Parameter | Current Celanese Guidance |
|---|---|
| Drying | Recommended |
| Drying Temperature | 80°C |
| Drying Time | ≥3 h in a dehumidified dryer |
| Processing Moisture Content | ≤0.08% |
| Maximum Regrind Level | 20% |
| Optimum Melt Temperature | 200°C |
| Minimum Melt Temperature | 185°C |
| Maximum Melt Temperature | 220°C |
| Optimum Mold Temperature | 30°C |
| Minimum Mold Temperature | 10°C |
| Maximum Mold Temperature | 50°C |
| Screw Speed | 100–200 rpm recommended |
| Holding Pressure | Approx. 50–75% of actual injection pressure |
| Optional Back Pressure | Approx. 0.3–0.7 MPa |
These current grade-specific values are a practical starting point for Santoprene 201-64 injection molding.
Extrusion Conditions
| Processing Parameter | Current Celanese Guidance |
|---|---|
| Drying Temperature | 82°C |
| Drying Time | 3 h |
| Melt Temperature Reference | 196°C |
Celanese also gives a broader Santoprene TPV processing window of approximately 175–230°C.
Shear-Dependent Flow
Santoprene 201-64 has relatively high melt viscosity at low shear rates.
As shear rate increases, apparent viscosity decreases.
This means:
- Smaller gates can increase shear and improve filling
- Higher screw speed can improve melt homogeneity
- Injection speed strongly influences flow
- Raising melt temperature alone may have less effect than increasing shear
- Back pressure can help maintain shot consistency when needed
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
When changing materials, processors should thoroughly purge the barrel, screw, hot runner or extrusion line to prevent contamination.
Related Products
Santoprene 201-55 – Natural, colorable general-purpose TPV with lower Shore A hardness for softer applications.
Santoprene 201-73 – Natural, colorable general-purpose TPV with higher hardness and stronger mechanical support.
Santoprene 201-80 – Natural, colorable higher-hardness TPV for firmer technical components.
View More TPV Thermoplastic Vulcanizates →
Technical Documents for Santoprene 201-64
| Document Type | Description |
|---|---|
| TDS | Current Celanese physical, mechanical, thermal, electrical and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| Automotive Specification Information | Ford, General Motors and Stellantis reference information |
| Santoprene Product Finder | Grade 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 201-64
Q1: What is Santoprene 201-64?
Santoprene 201-64 is a natural, colorable general-purpose TPV from Celanese with approximately Shore A 69 hardness, high elongation, excellent flex-fatigue resistance and excellent ozone resistance.
Q2: What is the hardness of Santoprene 201-64?
The current Celanese value is approximately Shore A 69.
Q3: Is Santoprene 201-64 colorable?
Yes. Celanese describes the grade as natural and colorable, making it suitable for applications requiring custom colors.
Q4: What is the elongation at break?
Current grade data lists approximately 450% elongation at break.
Q5: What is the tensile stress at break?
The current tensile stress at break is approximately 7.0 MPa.
Q6: How does Santoprene 201-64 perform at low temperature?
The current brittleness temperature is approximately -60°C.
Q7: What is the compression set?
Current Celanese data lists approximately 25% at 70°C / 24 h and 44% at 125°C / 70 h.
Q8: Can Santoprene 201-64 be injection molded and extruded?
Yes. Celanese lists injection molding, multi-injection molding, extrusion, sheet extrusion, coextrusion and blow molding.
Q9: What processing temperature is recommended?
Current injection guidance lists an optimum melt temperature of approximately 200°C, with a range of approximately 185–220°C.
Q10: Does Santoprene 201-64 have automotive specification references?
Yes. Current Celanese data lists references including Ford WSD-M2D379-A1, General Motors special-parts approval context and Stellantis references.
Request Santoprene 201-64 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 201-64, please provide:
- Required quantity
- Destination country or port
- Automotive, appliance, industrial, electrical or consumer application
- Seal, gasket, tube, profile or molded-part design
- Required Shore hardness
- Required finished color
- Continuous and peak operating temperature
- Minimum service temperature
- Compression-set requirement
- Chemical or fluid exposure
- Outdoor / ozone exposure
- Injection-molding, extrusion or blow-molding process
- Automotive or UL documentation requirement
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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