描述
Santoprene 291-60B150 is a colorable specialty thermoplastic vulcanizate from Celanese developed for bonding and overmolding onto engineering thermoplastics.
The grade is especially formulated to bond to:
- PC
- ABS
- PC/ABS
- ASA
- PMMA
This makes it particularly useful for products requiring a hard substrate plus soft elastomeric surface, such as grips, handles, seals, covers, bumpers and soft-touch functional components.
Celanese specifically highlights:
- Excellent adhesion to PC, ABS, PC/ABS, ASA and PMMA
- Suitability for cold-insert molding
- Suitability for 2K / two-shot molding
- Broad injection-molding processing window
- Superior part-surface appearance
- Soft-touch applications
Current typical material values include:
- 65 Shore A hardness
- 1.06 g/cm³ density
- 540% elongation at break
- 8.0 MPa tensile stress at break
- 2.1 MPa stress at 100% elongation
- 4.44 MPa shear modulus
- 34% compression set at 23°C / 24 h
- 62% compression set at 70°C / 24 h
The combination of soft elastomeric feel and engineered adhesion makes Santoprene 291-60B150 especially suitable for multi-material consumer, appliance, automotive and industrial parts.
For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.
For the current Santoprene portfolio, see the Official Celanese Santoprene & Geolast Product Finder →.
Key Features of Santoprene 291-60B150
| Feature | Engineering Benefit |
|---|---|
| 65 Shore A Hardness | Provides a soft, comfortable elastomeric feel |
| Bonding to PC | Suitable for soft-touch overmolding onto polycarbonate |
| Bonding to ABS | Supports hard/soft molded ABS assemblies |
| Bonding to PC/ABS | Suitable for common appliance and electronics substrates |
| Bonding to ASA | Useful for weather-resistant hard/soft constructions |
| Bonding to PMMA | Supports selected acrylic-based designs |
| 540% Elongation at Break | Provides high deformation capability |
| 8.0 MPa Tensile Stress at Break | Provides strong mechanical durability |
| 2.1 MPa Stress at 100% Elongation | Maintains soft elastomeric behavior |
| Broad Processing Window | Helps improve manufacturing robustness |
| Superior Surface Appearance | Useful for visible consumer and soft-touch components |
| Cold-Insert Molding | Supports overmolding onto pre-molded hard parts |
| 2K / Two-Shot Molding | Supports integrated hard/soft component production |
| Shear-Dependent Flow | Provides good flow under increased processing shear |
| Manufacturing-Stream Recyclability | Controlled production scrap can be reused |
Typical Applications for Santoprene 291-60B150
Santoprene 291-60B150 is intended for hard/soft constructions where the elastomer must adhere to common engineering thermoplastics.
| Application Area | Typical Use |
|---|---|
| Power Tools | Soft-touch handles and grips |
| Kitchen Tools | Comfortable grip surfaces |
| Small Appliances | Handles, seals and soft-touch interfaces |
| White Goods | Soft-touch components and sealing interfaces |
| Mobile Devices | Grips, protective surfaces and molded interfaces |
| Eyeglass Frames | Flexible comfort elements |
| Automotive Interiors | Soft-touch trims and functional interfaces |
| Automotive Under-Hood | Selected bonded elastomeric components |
| Grommets | Flexible bonded sealing parts |
| Bumpers | Soft impact and contact surfaces |
| Seals & Gaskets | Flexible sealing elements |
| Living Hinges | Repeated-flex elastomeric components |
| Tie-Layer Functions | Adhesion between hard and soft materials |
| Decorative Overmolding | Soft-touch visible surfaces |
Celanese-derived commercial descriptions identify applications such as power tools, writing instruments, kitchen tools, cell phones, eyewear frames, flexible grips, living hinges, seals, gaskets, white goods and small appliances.
Typical Properties of Santoprene 291-60B150
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 1.06 g/cm³ | ISO 1183 |
| Shore A Hardness | 65 | ISO 48-4 / ISO 868 |
| Product Form | Granules / Pellets | Manufacturer information |
| Appearance | Natural / Colorable | Manufacturer information |
| Filler | Unfilled | Commercial Celanese listing |
| Material Family | TPV / TPE-V | Manufacturer information |
Current commercial Celanese listings give a density of approximately 1.06 g/cm³ and identify the grade as unfilled TPV granules.
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation | 2.1 MPa | ISO 37 |
| Tensile Stress at Break | 8.0 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break | 540% | ISO 527-1/-2 or ISO 37 |
| Shear Modulus | 4.44 MPa | ISO 6721 |
| Compression Set, 23°C / 24 h | 34% | ISO 815 |
| Compression Set, 70°C / 24 h | 62% | ISO 815 |
| Shore A Hardness | 65 | ISO 48-4 / ISO 868 |
These properties give Santoprene 291-60B150 a soft, highly extensible character suitable for grips and bonded flexible components.
Adhesion to PC, ABS, PC/ABS, ASA and PMMA
The most important technical feature of Santoprene 291-60B150 is its engineered adhesion.
Celanese states that the grade is specifically formulated for bonding to:
- Polycarbonate (PC)
- Acrylonitrile Butadiene Styrene (ABS)
- PC/ABS blends
- ASA
- PMMA acrylic
This allows manufacturers to create a hard substrate with an integrated soft elastomeric layer.
Typical designs include:
- Soft-touch handles
- Ergonomic grips
- Protective bumpers
- Sealing lips
- Flexible covers
- Anti-slip surfaces
- Decorative soft-touch areas
- Hard/soft housings
The grade is intended for both cold-insert overmolding and 2K / two-shot molding.
Soft-Touch Surface Applications
Celanese recommends Santoprene 291-60B150 for applications requiring soft touch and superior part surface appearance.
This makes the grade particularly relevant to consumer products where appearance and tactile feel matter.
Potential applications include:
- Power-tool handles
- Kitchen utensil grips
- Appliance controls
- Personal-care devices
- Electronics housings
- Hand-held equipment
- Writing instruments
- Automotive touch surfaces
At approximately 65 Shore A, the material provides a noticeable elastomeric feel without being extremely soft.
2K / Two-Shot Molding
Santoprene 291-60B150 is specifically designed for 2K or two-shot molding.
In a typical two-shot process:
- The rigid PC, ABS, PC/ABS, ASA or PMMA substrate is molded.
- Santoprene 291-60B150 is injected onto the rigid substrate.
- Heat, pressure and compatible surface chemistry allow the TPV to form adhesion to the hard component.
This approach can eliminate:
- Separate mechanical fasteners
- Secondary assembly steps
- Some adhesive-bonding operations
It can also enable more integrated component designs with soft-touch surfaces and flexible sealing zones.
Cold-Insert Overmolding
Santoprene 291-60B150 can also be used for cold-insert molding, where a pre-molded rigid part is placed into the mold before the TPV is injected around or onto it.
Cold-insert performance depends heavily on:
- Insert temperature
- Surface cleanliness
- Mold design
- Melt temperature
- Injection speed
- Contact pressure
- Interface geometry
- Substrate resin
For critical bonding applications, actual adhesion should always be confirmed using the customer’s specific rigid resin grade and part design.
Heat Aging Performance
Published grade data also provides useful heat-aging information.
| Property | Aging Condition | Typical Change |
|---|---|---|
| Tensile Strength | 100°C / 168 h | 0% |
| Elongation at Break | 100°C / 168 h | -11% |
| Shore A Hardness | 100°C / 672 h | -2 points |
| Mass | Heat aging | -1.1% |
These values indicate useful retention of tensile performance after elevated-temperature aging.
Why Choose Santoprene 291-60B150?
The main reason to select Santoprene 291-60B150 is not simply its 65A hardness; it is the grade’s engineered bonding capability to common engineering thermoplastics.
The material provides:
- Excellent adhesion to PC
- Excellent adhesion to ABS
- Adhesion to PC/ABS
- Adhesion to ASA
- Adhesion to PMMA
- Soft-touch surface
- High elongation
- Broad molding window
- Good visible-part appearance
- 2K processing capability
- Cold-insert overmolding capability
Its approximately 540% elongation allows significant deformation, while its 8.0 MPa tensile stress at break provides useful durability.
For manufacturers developing hard/soft molded assemblies, ergonomic grips, appliance components or soft-touch consumer parts, Santoprene 291-60B150 is an important bonding TPV to evaluate.
Processing Guidelines for Santoprene 291-60B150
Santoprene 291-60B150 is a shear-dependent bonding TPV that can be processed on conventional thermoplastic equipment.
Published processing methods include:
- Injection molding
- Multi-injection molding
- 2K / two-shot molding
- Extrusion
- Coextrusion
Drying Conditions
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Recommended | Yes |
| Drying Temperature | 90°C |
| Drying Time | 3 hours |
| Dryer Type | Desiccant / dehumidified dryer |
The 2023 Celanese Materials Database sheet recommends 3 hours desiccant drying at 90°C. It also notes that because this grade is inherently designed to bond, material may occasionally agglomerate during shipping or storage.
Older ExxonMobil-era sheets cite 80°C for 3 hours, so for current production the newer Celanese 90°C guidance should take priority.
Injection Molding
| Processing Parameter | Celanese Guidance |
|---|---|
| Optimum Melt Temperature | 215°C |
| Drying Temperature | 90°C |
| Drying Time | 3 h |
The current Celanese Materials Database gives an optimum injection melt temperature of approximately 215°C.
For bonding applications, processors should pay particular attention to:
- Substrate temperature
- Melt temperature
- Injection speed
- Holding pressure
- Interface pressure
- Gate location
- Flow direction
- Mold venting
- Contact time
- Surface contamination
- Substrate resin grade
Higher interface temperature and good melt contact generally help adhesion, but the process should remain within the recommended material window.
Shear-Dependent Flow
Santoprene 291-60B150 is explicitly described as shear dependent.
As shear rate rises, apparent viscosity decreases.
This is useful in:
- Thin overmolded sections
- Small gates
- Grip geometries
- Detailed soft-touch surfaces
- Multi-shot molded parts
Storage and Agglomeration
Because Santoprene 291-60B150 is designed to have strong bonding characteristics, Celanese notes that pellets may occasionally agglomerate during shipping and storage.
Good handling practice should therefore include:
- Dry storage
- Controlled warehouse temperature
- Correct bag stacking
- Inspection before feeding
- Proper desiccant drying
- Avoiding unnecessary heat exposure before processing
Material Compatibility
Santoprene 291-60B150 is specifically designed to bond to selected engineering plastics, but Celanese processing information also states that Santoprene TPV is incompatible with acetal (POM) and PVC.
Processing equipment should be thoroughly purged when changing between these materials and Santoprene 291-60B150.
Related Products
We supply Santoprene TPV grades for different bonding, overmolding, soft-touch and processing requirements.
Typical Santoprene product families include:
- Santoprene 291 B150 bonding grades
- Santoprene overmolding grades
- Santoprene PC bonding grades
- Santoprene ABS bonding grades
- Santoprene PC/ABS bonding grades
- Santoprene PMMA bonding grades
- Santoprene soft-touch grades
- Santoprene 2K molding grades
- Santoprene specialty TPV grades
View More TPV Thermoplastic Vulcanizates →
For grade-selection support, send us your substrate resin, required hardness, molding method and adhesion requirement.
Technical Documents for Santoprene 291-60B150
| Document Type | Description |
|---|---|
| TDS | Physical, mechanical, bonding and processing data |
| SDS | Safety Data Sheet |
| Bonding Guide | PC, ABS, PC/ABS, ASA and PMMA overmolding information |
| Processing Guide | Injection molding, 2K molding and extrusion guidance |
| Storage & Handling Guide | Guidance for Santoprene bonding grades |
| Santoprene Product Finder | Celanese TPV grade portfolio |
| COA | Batch-specific quality information where available |
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FAQ About Santoprene 291-60B150
Q1: What is Santoprene 291-60B150?
Santoprene 291-60B150 is a colorable specialty TPV from Celanese designed for bonding to rigid engineering plastics in hard/soft molding applications.
Q2: What is the hardness of Santoprene 291-60B150?
The current published hardness is approximately 65 Shore A.
Q3: What materials can Santoprene 291-60B150 bond to?
Celanese specifically lists PC, ABS, PC/ABS, ASA and PMMA.
Q4: Is Santoprene 291-60B150 suitable for PC overmolding?
Yes. PC is one of the primary substrates for which this grade is specifically formulated.
Q5: Can it bond to ABS?
Yes. ABS is explicitly listed as a compatible bonding substrate.
Q6: Is Santoprene 291-60B150 suitable for PC/ABS?
Yes. PC/ABS is one of the listed hard substrates for this bonding grade.
Q7: Can it bond to PMMA?
Yes. Celanese specifically lists PMMA among the intended bonding substrates.
Q8: What is the tensile strength?
The typical tensile stress at break is approximately 8.0 MPa.
Q9: What is the elongation at break?
The typical elongation at break is approximately 540%.
Q10: What is the tensile stress at 100% elongation?
The typical value is approximately 2.1 MPa.
Q11: What is the density?
The typical density is approximately 1.06 g/cm³.
Q12: Is Santoprene 291-60B150 suitable for 2K molding?
Yes. Celanese specifically recommends the grade for 2K / two-shot molding.
Q13: Can Santoprene 291-60B150 be used for cold-insert overmolding?
Yes. Celanese lists both cold-insert and 2K molding as bonding routes.
Q14: Is Santoprene 291-60B150 suitable for soft-touch applications?
Yes. Celanese specifically recommends the grade for soft-touch applications and for components requiring superior part-surface appearance.
Q15: Does Santoprene 291-60B150 require drying?
Yes. Current Celanese data recommends approximately 90°C for 3 hours in a desiccant dryer.
Q16: What injection melt temperature is recommended?
The current Celanese Materials Database gives an optimum melt temperature of approximately 215°C.
Request Santoprene 291-60B150 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 291-60B150, please provide:
- Required quantity
- Destination country or port
- Rigid substrate: PC / ABS / PC-ABS / ASA / PMMA
- Overmolding or coextrusion application
- Cold-insert or 2K molding process
- Required Shore hardness
- Required color
- Soft-touch requirement
- Adhesion requirement
- Component geometry
- Service temperature
- TDS / SDS requirement
- Processing guide requirement
- Sample requirement, if applicable
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