描述
Santoprene 251-85W232 is a hard, natural and colorable flame-retardant thermoplastic vulcanizate from Celanese developed for electrical, wire-and-cable and automotive applications requiring a combination of elastomeric flexibility and flame resistance.
The grade has a typical hardness of approximately 89 Shore A, placing it toward the firmer end of the Santoprene Shore A range while still maintaining substantial elastomeric deformation.
Current Celanese product information lists approximately 540% elongation at break, 10.6 MPa tensile stress at break and approximately 4.5 MPa tensile stress at 100% elongation.
This combination gives Santoprene 251-85W232 strong mechanical support while retaining the flexibility required for cable jackets, connector seals and other flexible electrical components.
The material is specifically described as a flame-retardant TPV and achieves a published UL 94 V-2 rating at 0.75 mm thickness.
Santoprene 251-85W232 also provides:
- Excellent flex-fatigue resistance
- Excellent ozone resistance
- Good fluid resistance
- Broad thermoplastic processability
- Wire-and-cable UL recognition
The grade is shear dependent and can be processed using conventional thermoplastic equipment for injection molding, extrusion, blow molding, thermoforming and vacuum forming.
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 251-85W232
| Feature | Engineering Benefit |
|---|---|
| 89 Shore A Hardness | Provides firm elastomeric support |
| UL 94 V-2 @ 0.75 mm | Supports flame-retardant electrical and cable applications |
| 540% Elongation at Break | Maintains high deformation capability |
| 10.6 MPa Tensile Stress at Break | Provides strong mechanical performance |
| 4.5 MPa Stress at 100% Elongation | Provides firm elastic response |
| Excellent Flex-Fatigue Resistance | Suitable for repeatedly bending components |
| Excellent Ozone Resistance | Supports outdoor and long-term environmental service |
| Good Fluid Resistance | Useful in automotive and industrial environments |
| Natural / Colorable | Supports customized product colors |
| Wire & Cable UL Recognition | Listed under UL QMTT2 E86313 |
| 105°C Cable Jacket Temperature Rating | Supports demanding wire-and-cable applications |
| Injection Moldable | Suitable for connectors, seals and molded parts |
| Extrudable | Suitable for wire and cable jacketing |
| Blow Moldable | Supports selected hollow components |
| Thermoformable / Vacuum Formable | Provides additional manufacturing flexibility |
The most important combination for Santoprene 251-85W232 is 89A hardness + UL 94 V-2 + wire-and-cable recognition + 105°C jacket rating.
Typical Applications for Santoprene 251-85W232
Santoprene 251-85W232 is especially suitable for electrical and wire-and-cable applications requiring a firm flame-retardant TPV.
| Application Area | Typical Use |
|---|---|
| Wire & Cable Jackets | Flexible flame-retardant cable jacketing |
| Flexible Cord Jackets | Appliance and industrial flexible cords |
| Electrical Connectors | Flame-retardant flexible connector components |
| Connector Seals | Flexible sealing components |
| Cable Boots | Flexible cable-entry protection |
| Strain Reliefs | Molded cable protection and stress relief |
| Grommets | Electrical and mechanical protection |
| Automotive Electrical Parts | Flame-retardant connectors and seals |
| Telecommunications Cable | Flexible protective jackets |
| Industrial Cable | Protective outer jackets |
| Appliance Wiring | Flexible flame-resistant components |
| Fiber-Optic Applications | Protective cable components |
| Robotic Cable | Flexible jackets for repeated movement |
Celanese’s electrical application guide identifies Santoprene TPV for low-voltage power cable, robotic wire, data and communications cable, instrumentation wire, fiber optics, flexible cords, appliance wires, submersible-pump cables, tray cables and heat-tracer cables.
Typical Properties of Santoprene 251-85W232
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 1150 kg/m³ / 1.15 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 89 | ISO 48-4 / ISO 868 |
| Appearance | Natural / Colorable | Manufacturer information |
| Product Form | Pellets | Manufacturer information |
| Polymer Base | Polyolefin-based TPV | Manufacturer information |
Current Celanese Materials Database information lists approximately 1.15 g/cm³ density.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation | 4.5 MPa | ISO 527-1/-2 or ISO 37 |
| Tensile Stress at Break | 10.6 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break | 540% | ISO 527-1/-2 or ISO 37 |
| Shore A Hardness | 89 | ISO 48-4 / ISO 868 |
These values show that Santoprene 251-85W232 provides high mechanical strength while still retaining substantial elastomeric extensibility.
Flame Retardant Performance
Flame resistance is one of the main reasons to select Santoprene 251-85W232.
| Property | Typical Value | Standard |
|---|---|---|
| UL 94 Rating | V-2 | UL 94 |
| Thickness Tested | 0.75 mm | UL 94 |
| UL Recognition | Yes | UL 94 |
| UL Plastics File | QMFZ2.E80017 | UL |
| UL Canada File | QMFZ8.E80017 | UL |
| UL Wire & Cable File | QMTT2.E86313 | UL |
Celanese specifically recommends the grade for applications requiring a UL 94 vertical flame-rated material.
A critical point for your website is that 251-85W232 should be written as V-2 at 0.75 mm, not V-0.
UL Wire & Cable Performance
Santoprene 251-85W232 has dedicated wire-and-cable recognition.
UL currently lists:
- Manufacturer: Celanese International Corp.
- Grade: Santoprene 251-85W232
- Category: Polymeric Materials for Use in Wire, Cable and Flexible Lighting Products
- File: E86313
- Classification: 720 Hour Sunlight Resistant Jacket Compounds
- Color: All
- Temperature Rating: 105°C
This is an important sales point for wire-and-cable customers because it provides a more application-specific qualification than a general UL 94 rating alone.
Celanese’s own electrical guide also lists Santoprene 251-85W232 as an UL-certified recommended wire-and-cable grade, with a 105°C jacket compound temperature rating.
Flame-Retardant Formulation
Santoprene 251-85W232 contains non-ether brominated flame retardants.
Celanese also states that the material does not contain metal deactivators.
This point is important because W232 should not be presented in the same way as the W236 potable-water / metal-stabilized series.
For Santoprene 251-85W232, the key material-selection factors are:
- Flame retardancy
- Wire-and-cable suitability
- 105°C jacket rating
- Flex-fatigue resistance
- Ozone resistance
- Good fluid resistance
Flex-Fatigue & Ozone Resistance
Celanese specifically recommends Santoprene 251-85W232 for applications requiring excellent flex-fatigue resistance and excellent ozone resistance.
These characteristics are particularly valuable for components subject to repeated movement, including:
- Cable bending
- Connector movement
- Flexing
- Twisting
- Vibration
- Repeated installation stress
Ozone resistance also supports long-term use in industrial, automotive and outdoor environments.
Electrical Application Advantages
Celanese positions Santoprene TPV for low-voltage electrical applications requiring flexibility, electrical insulation and thermoplastic processing.
Potential uses include:
- Wire insulation
- Cable jackets
- Molded electrical components
- Strain reliefs
- Enclosure seals
- Splice-sealing components
Celanese notes applications across utilities, appliance, construction, automotive, robotics, telecommunications, solar and wind-energy industries.
Why Choose Santoprene 251-85W232?
The main reason to choose Santoprene 251-85W232 is its balance of firmness, flame resistance and wire-and-cable performance.
At approximately 89 Shore A, the material provides a relatively firm elastomeric structure.
Its approximately 540% elongation at break allows high elastic deformation.
The typical 10.6 MPa tensile stress at break provides strong mechanical performance.
The grade’s UL 94 V-2 rating at only 0.75 mm thickness makes it relevant to relatively thin flexible electrical components.
More importantly for wire-and-cable applications, UL currently lists the grade as a 720-hour sunlight-resistant jacket compound rated at 105°C.
Excellent flex-fatigue resistance is useful for cable systems exposed to repeated bending, while excellent ozone resistance supports long-term environmental durability.
For customers requiring an 89A colorable flame-retardant TPV for wire, cable, connector or electrical applications, Santoprene 251-85W232 is an important grade to evaluate.
Processing Guidelines for Santoprene 251-85W232
Current Celanese material information lists the following processes:
- Injection molding
- Extrusion
- Blow molding
- Thermoforming
- Vacuum forming
General Processing Conditions
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Recommended | Yes |
| Drying Temperature | 80°C |
| Drying Time | 3 hours |
| General Processing Temperature | 175–230°C |
Celanese recommends approximately 3 hours of desiccant drying at 80°C before processing.
The published general processing window is approximately 175–230°C.
Shear-Dependent Flow
Santoprene 251-85W232 is a shear-dependent TPV.
This means melt viscosity decreases as processing shear increases.
Important variables include:
- Injection speed
- Screw speed
- Gate dimensions
- Melt temperature
- Back pressure
- Mold temperature
- Die geometry
- Extrusion pressure
- Cooling conditions
- Draw-down ratio
Injection Molding
For injection molding, processors should optimize:
- Barrel temperature profile
- Injection speed
- Holding pressure
- Screw speed
- Back pressure
- Gate design
- Runner dimensions
- Venting
- Cooling time
- Surface appearance
Extrusion & Cable Jacketing
For cable and profile extrusion, important variables include:
- Barrel-zone temperatures
- Adapter temperature
- Die temperature
- Screw speed
- Melt pressure
- Line speed
- Draw-down
- Cooling
- Jacket concentricity
- Surface finish
Because Santoprene 251-85W232 is specifically UL recognized for wire-and-cable jacket applications, extrusion process optimization is particularly relevant for this grade.
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
Processing equipment should be thoroughly purged when changing between these materials and Santoprene 251-85W232.
Related Products
We supply Santoprene TPV grades for different flame-retardancy, hardness, wire-and-cable and electrical requirements.
Typical Santoprene product families include:
- Santoprene 251 Series
- Santoprene flame-retardant grades
- Santoprene wire-and-cable grades
- Santoprene electrical grades
- Santoprene connector grades
- Santoprene cable-jacketing grades
- Santoprene automotive electrical grades
- Santoprene specialty TPV grades
View More TPV Thermoplastic Vulcanizates →
If you need grade-selection support, send us your required flame rating, cable temperature rating, Shore hardness, jacket thickness and processing method.
Technical Documents for Santoprene 251-85W232
| Document Type | Description |
|---|---|
| TDS | Physical, mechanical, flammability and processing data |
| SDS | Safety Data Sheet |
| UL 94 Information | V-2 at 0.75 mm |
| UL Plastics Information | QMFZ2.E80017 / QMFZ8.E80017 |
| UL Wire & Cable Information | QMTT2.E86313 |
| Sunlight Resistance Information | 720-hour sunlight-resistant jacket compound |
| Processing Guide | Injection molding and extrusion information |
| Santoprene Product Finder | Celanese TPV portfolio information |
| COA | Batch-specific quality information where available |
Need technical documents for Santoprene 251-85W232?
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Please state Santoprene 251-85W232 and whether you require TDS, SDS, UL 94 or wire-and-cable documentation.
FAQ About Santoprene 251-85W232
Q1: What is Santoprene 251-85W232?
Santoprene 251-85W232 is a hard, natural and colorable flame-retardant thermoplastic vulcanizate from Celanese for electrical, wire-and-cable and automotive applications.
Q2: What is the hardness of Santoprene 251-85W232?
The typical hardness is approximately 89 Shore A.
Q3: Is Santoprene 251-85W232 UL 94 V-0?
No. Current Celanese data lists UL 94 V-2 at 0.75 mm for Santoprene 251-85W232.
Q4: What is the elongation at break?
The typical elongation at break is approximately 540%.
Q5: What is the tensile stress at break?
The typical tensile stress at break is approximately 10.6 MPa.
Q6: What is the tensile stress at 100% elongation?
The typical value is approximately 4.5 MPa.
Q7: What is the density?
The typical density is approximately 1.15 g/cm³.
Q8: Is Santoprene 251-85W232 suitable for wire and cable?
Yes. It is UL listed under QMTT2 E86313 for polymeric materials used in wire, cable and flexible lighting products.
Q9: What is its cable temperature rating?
UL currently lists Santoprene 251-85W232 as a 105°C jacket compound.
Q10: Is it sunlight resistant?
Yes. The current UL listing identifies it as a 720-hour sunlight-resistant jacket compound.
Q11: Is Santoprene 251-85W232 resistant to ozone?
Yes. Excellent ozone resistance is one of the manufacturer’s published key features.
Q12: Is it suitable for repeated flexing?
Yes. Celanese recommends the grade for applications requiring excellent flex-fatigue resistance.
Q13: What flame-retardant chemistry does it use?
Celanese describes Santoprene 251-85W232 as containing non-ether brominated flame retardants.
Q14: Does it contain metal deactivators?
No. The Celanese grade description states that metal deactivators are not contained.
Q15: Can Santoprene 251-85W232 be extruded?
Yes. Extrusion is one of the published processing methods, making the grade relevant to wire-and-cable jacketing and profile applications.
Q16: What processing temperature is recommended?
Celanese lists a broad Santoprene TPV processing window of approximately 175–230°C, with desiccant drying at approximately 80°C for 3 hours recommended before processing.
Request Santoprene 251-85W232 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 251-85W232, please provide:
- Required quantity
- Destination country or port
- Wire, cable, connector, electrical or automotive application
- Required UL flame rating
- Minimum wall or jacket thickness
- Required Shore hardness
- Required color
- Cable temperature rating
- Sunlight-resistance requirement
- Flex-fatigue requirement
- Fluid or chemical exposure
- Injection-molding or extrusion process
- UL documentation requirement
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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