PRODUCTS

ROYALENE 515

Royalene 515 is used closed-cell sheet and profile sponge extrusions (closed-cell foam).
Royalene 515 is used automotive window channel extrusions / glass-run channels and other automotive sealing/weathersealing parts.
Royalene 515 is used general elastomeric applications requiring weather, ozone and heat resistance, and low temperature flexibility.

CAS number: 25038-36-2
EC number: No specific number
Chemical Name: Poly(ethylene-co-propylene-co-ethylidene norbornene)
Composition is:
Ethylene (C₂H₄)
Propylene (C₃H₆)
Diene component: Ethylidene Norbornene (ENB) → C₉H₁₂
Molecular weight: Royalene 515 has no single molecular weight, but: It has medium molecular weight distribution
Processability indicator: Mooney Viscosity ~82 ML(1+4) 150°C, which corresponds to a high molecular weight EPDM

SYNONYMS:
Ethylene propylene diene terpolymer, EPDM, Ethylene-Propylene-Diene Monomer rubber, Ethylene/propylene/diene terpolymer, Poly(ethylene-co-propylene-co-5-methylene-2-norbornene), Bicyclo[2.2.1]hept-2-ene,5-ethylidene-, polymer with ethene and 1-propene, EPM rubber

Royalene 515 is a specialized EPDM (ethylene-propylene-diene) terpolymer produced by Lion Elastomers.
Royalene 515 is designed for demanding elastomer applications, especially in automotive sealing and sponge extrusion.

One of its standout characteristics is its very high unsaturation level, thanks to a relatively high content of the diene monomer (ethylidene norbornene, ENB, about 9.5 wt %), which gives Royalene 515 an ultra-fast cure rate when using sulfur vulcanization.
Because of this fast cure behavior, Royalene 515 is particularly well-suited for closed-cell sponge profiles and sheet extrusions.

Royalene 515's raw polymer properties include a Mooney viscosity of about 82 (ML (1+4) / 150 °C), which indicates a moderate-to-high molecular weight suited for extrusion.
The polymer’s density (specific gravity) is around 0.86, which is fairly typical for Royalene 515.

Volatile matter (residual volatiles in the raw polymer) of Royalene 515 is quite low (“0.7 wt% max”), which is good for compounding consistency.
On the safety and regulatory side, Royalene 515 is listed in key chemical inventories (e.g., TSCA in the U.S.) according to Knowde.
As with most Royalene 515 polymers, its handling is relatively safe for a polymer: you should avoid creating excessive dust, use standard industrial hygiene, wear protective gloves and eyewear, and ensure good ventilation during mixing.

Because Royalene 515's not highly reactive, the main concerns would be dust and heat; in case of fire, it can burn and produce typical polymer combustion products, so fire-fighting should be done with appropriate equipment.
Royalene 515 is an Ultra Fast Curing Polymer for Automotive Extrusions.

Royalene 515 is an ethylene propylene diene (EPDM) rubber.
Royalene 515 contains a non-staining stabilizer.

Royalene 515 exhibits medium molecular weight distribution, high unsaturation, ultra-fast curing, and excellent compression set- & weathering resistance.
Royalene 515 offers rapid mixing, excellent dispersion properties and low temperature properties.

Royalene 515 co-cures well with SBR.
Royalene 515 is designed for processing by closed cell sheet sponge profile extrusion.

Royalene 515 is an EPDM (ethylene-propylene-diene monomer) terpolymer grade made for fast curing closed-cell sponge and automotive extrusion applications — white, solid polymer with Mooney viscosity of Royalene 515 is ~82 (ML(1+4)/150°C), E/P ratio ≈ 62/38 and ENB (diene) ≈ 9.5 wt.%.

USES and APPLICATIONS of ROYALENE 515:
Royalene 515's very good compression set resistance helps the final sponge retain its shape and sealing properties under long-term compression.
In addition to that, Royalene 515 exhibits excellent low-temperature performance.
Royalene 515 in general is known for flexibility at low temperatures, and this grade leverages that well, making it reliable in cold weather applications.

Weathering resistance is another strong point: Royalene 515 resists ozone, UV, and general long-term aging, which is why it's used in applications exposed to outdoor conditions.
From a processing perspective, Royalene 515 is supplied in a “friable bale” form, which means the material is easily broken apart during mixing in internal mixers.

That helps with good dispersion of Royalene 515, which is important for obtaining uniform compound performance.
In compounding, it can co-cure well with other rubbers like SBR (styrene-butadiene rubber), which allows formulators to design hybrid compounds benefiting from Royalene 515’s weather resistance together with SBR’s mechanical characteristics.

From a performance-chemistry standpoint, research has shown (in development studies) that Royalene 515 achieves high crosslink density in compounding, more than some EPDM grades, thanks to its high ENB.
This means that once cured, its network structure tends to be tight, which helps with mechanical properties like strength and resilience.

In those studies, tensile strength in well-filled/oiled compounds reached around 13 MPa under some formulations.
In practical applications, Royalene 515 is often used to make automotive window channels (the rubber parts that the glass slides in), because its fast cure and good weather resistance speed up production and improve durability.

Royalene 515’s also used in closed-cell sealing sponge and sheet rubber for gaskets and other sealing profiles.
Because of its stability and non-staining stabilizer, Royalene 515 is also preferred in colored or white rubber products where discoloration from the polymer would be unacceptable.

Finally, in terms of polymer theory: Royalene 515 is a non-polar elastomer with great resistance to heat, oxidation, and weather, but poor resistance to hydrocarbons like gasoline or mineral oils.
Royalene 515, as a higher unsaturation EPDM, retains those EPDM strengths (weather resistance, flexibility) but also brings in a more reactive diene, making it very useful when fast vulcanization is needed without compromising aging stability.

Royalene 515 is used in automotive window channel applications.
Royalene 515 is an Ultra Fast Curing Polymer for Automotive Extrusions
Applications of Royalene 515: Closed cell sponge profile extrusions, Closed cell sheet sponge, Automotive window channel extrusions

KEY PERFORMANCE CHARACTERISTICS & BENEFITS of ROYALENE 515:
Ultra-fast cure rate (high unsaturation / higher diene content → fast sulfur curatives).
Excellent compression-set resistance for closed-cell sponges (helps seals keep shape under compression).
Good low-temperature properties and excellent weathering / ozone resistance (typical EPDM advantages).
Co-cures well with SBR (useful in blends/composites).
Non-staining stabilizer (important for some colored or finished parts).

UNIQUE FEATURES of ROYALENE 515:
*High unsaturation
*Ultra fast cure rate
*Excellent compression set resistance in closed cell sponge extrusions
*Excellent low temperature properties
*Co-cures well with SBR - Non-staining

FEATURES of ROYALENE 515:
*High unsaturation - Ultra fast cure rate
*Excellent compression set resistance in closed cell sponge extrusions
*Excellent low temperature properties
*Co-cures well with SBR
*Non-staining
*Friable bale form for rapid mixing in internal mixers and excellent dispersion properties
*Excellent weathering resistance

PHYSICAL and CHEMICAL PROPERTIES of ROYALENE 515:
Trade name: ROYALENE® 515.
Polymer family: EPDM (Ethylene-Propylene-Diene Monomer / terpolymer).
Representative polymer name (used in SDS / inventories): Bicyclo[2.2.1]hept-2-ene, 5-ethylidene-, polymer with ethene and 1-propene (common CAS used for EPDM grades). CAS: 25038-36-2.
EC number: not generally assigned/available for the trade grade (no discrete EC number listed in the SDS/TDS); many polymer trade grades are listed under polymer names instead — see ECHA/public inventories for polymer entries.
Physical form / appearance: Solid, off-white / white — slight odor.

Density / specific gravity: ~0.86 g/cm³ (860 kg/m³).
Mooney viscosity (typical): ~82 (ML (1+4) / 150 °C) (this indicates a medium-high molecular weight for processing).
Ethylene / Propylene weight ratio (E/P): ~62/38.
Diene type & content: ENB (ethylidene norbornene), ≈ 9.5 wt.% for this grade (ENB provides sites for sulfur vulcanization / crosslinking).
Molecular weight distribution: medium (per TDS).
Solubility: typical EPDM polymers are insoluble in water; soluble in certain aromatic/chlorinated solvents at high temperature (polymer dissolution conditions vary).

Flammability / thermal: non-flammable solid under normal conditions
Chemical type: Ethylene-Propylene-Diene Terpolymer (EPDM)
Raw polymer form: Solid, friable bale
Color: Off-white
Density (Specific Gravity): ~ 0.86 g/cm³
Mooney Viscosity (unmilled, ML (1+4) / 150 °C): ~ 82 MU
Ethylene / Propylene weight ratio (E/P): ~ 62 / 38 wt%
Diene content (ENB, Ethylidene Norbornene): ~ 9.5 wt%

Molecular weight distribution: Medium, per manufacturer’s data
Volatile matter: ≤ 0.7 wt%
Stabilizer: Non-staining type (the polymer is stabilized but does not stain)
Physical/commercial form: Bale of approx. 55.1 lb (~25 kg) per bale in the “friable bale” form
CAS Number: 25038-36-2
EC Number: Not assigned (polymer; exempt under REACH)
Chemical Name: Poly(ethylene-co-propylene-co-ethylidene norbornene)
Molecular Formula: Not applicable for polymers
Molecular Weight: Not a single value; high MW polymer

FIRST AID MEASURES of ROYALENE 515:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of ROYALENE 515:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of ROYALENE 515:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of ROYALENE 515:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of ROYALENE 515:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of ROYALENE 515:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available