ROYALENE 525

Royalene 525 is used in automotive window channel applications.
Royalene 525 is used an Ultra Fast Curing Polymer for Automotive Extrusions
Royalene 525 is manufactured in friable bales for rapid mixing.

CAS Number: 25038-36-2 — this is the typical CAS for EPDM terpolymer. 
EC Number: 500-039-8
Molecular Formula: As a polymer, there is no fixed “small-molecule” formula, but for the monomer repeat unit it's often effectively described as C₁₄H₂₂ in regulatory / catalog data. 
Molecular Weight: Not a single defined value (because it's a polymer), but the monomer-based “formula weight” is ~ 190.32 g/mol in small-molecule equivalents. 

SYNONYMS:
Ethylene propylene diene terpolymer, EPDM, Ethylene-Propylene-Diene Monomer rubber, Ethylene/Propylene/Diene terpolymer, Poly(ethylene-co-propylene-co-5-ethylidene-2-norbornene), Ethylene-ethylidenenorbornene-propylene copolymer, ETHYLENE/PROPYLENE/DIENE TERPOLYMER

Royalene 525 is an EPDM (ethylene–propylene–diene monomer) terpolymer specifically formulated as an ultra-fast curing polymer for extrusion and closed-cell sponge/profile applications, particularly in automotive sealing and window-channel parts.
Royalene 525 is manufactured is supplied as a friable solid suitable for rapid mixing and good dispersion in typical rubber compounding processes.

Royalene 525 is ethylene propylene diene (EPDM) rubber.
Royalene 525 contains a non-staining stabilizer.

Royalene 525 exhibits medium molecular weight distribution, high unsaturation, ultra-fast curing, and excellent compression set- & weathering resistance.
Royalene 525 offers rapid mixing, excellent dispersion properties and low temperature properties.

Royalene 525 co-cures well with SBR.
Royalene 525 is designed for closed cell sheet sponge profile extrusion.
Royalene 525 is a 60/40 EP ratio, ENB third monomer

Royalene 525 is a terpolymer of ethylene, propylene and a non-conjugated diene (ENB).
This medium Mooney, ultra-fast curing polymer offers exceptional low temperature properties and also excellent compression set resistance.

USES and APPLICATIONS of ROYALENE 525:
Typical applications / uses of Royalene 525: closed-cell sheet and profile sponge extrusion, automotive window channels and weatherseals, molding and extrusion for gaskets and seals exposed to outdoor conditions, hoses where weather and ozone resistance are needed, and specialty elastomer blends where fast curing is an advantage.

The combination of weather resistance and fast cure makes Royalene 525 popular in automotive and industrial sealing applications.
Plastics & Elastomers End Uses of Royalene 525: Automotive Applications, Automotive Exterior Parts, Automotive Interior Parts, Automotive Interior Trim, Automotive Under The Hood, Automotive Window Encapsulation, Gaskets, General Purpose, and Radiator Seals.

Applications of Royalene 525: Closed cell sponge profile extrusions,
Closed cell sheet sponge, Automotive window channel extrusions, An Ultra Fast Curing Polymer for Automotive Extrusions.
Applications of Royalene 525: Closed cell sponge profile extrusions, Closed cell sheet sponge, and Automotive window channel extrusions.

Royalene 525 is used in automotive window channel applications.
Royalene 525 is used an Ultra Fast Curing Polymer for Automotive Extrusions

Royalene 525 is manufactured in friable bales for rapid mixing.
The primary applications for Royalene 525 are automotive flocked window channels, closed cell sponge profile extrusions, and sheet sponge.

UNIQUE FEATURES of ROYALENE 525:
*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

MATERIALS FEATURES of ROYALENE 525:
*Fast Curing,
*General Purpose,
*Good Moldability,
*Good Processability,
*Good Weather Stability,
*Low Compression Set,
*Low Temperature Flexibility,
*Low Temperature Strength

CHEMICAL CHARACTERISTICS AND COMPOSITION of ROYALENE 525:
the EPDM terpolymer is built from three monomers — ethylene, propylene and a non-conjugated diene (usually ethylidene norbornene — ENB for Royalene 525).

Typical E/P weight ratios for Royalene family grades vary by grade; Royalene 525 is designed with an ethylene/propylene balance and a relatively high ENB level to enable ultra-fast sulfur cure rates and achieve high crosslink density in typical sulfur-vulcanized compounds.
Those features make it especially useful where short cure times and excellent compression set are required.

PERFORMANCE & BENEFITS of ROYALENE 525:
Royalene 525 provides ultra-fast curing, excellent compression-set resistance (important for sealing/sponging), outstanding weathering and ozone resistance, good low-temperature flexibility, and rapid mixing/dispersion in rubber compounds.
Royalene 525 co-cures well with SBR in blends when formulators want to combine properties.

Because of the high unsaturation (ENB), cured compounds from Royalene 525 achieve high crosslink density and good mechanical durability in finished parts.
These characteristics explain why the grade is commonly selected for automotive window channels, closed-cell sponge gaskets, and other exterior sealing profiles.

FEATURES of ROYALENE 525:
- 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 

PROCESSING METHODS of ROYALENE 525:
Extrusion, 
Profile Extrusion

PHYSICAL PROPERTIES of ROYALENE 525:
Royalene 525 is a solid, off-white / white material supplied as friable bales.
Typical raw polymer density (specific gravity) of Royalene 525 is about 0.86 g·cm⁻³.

Royalene 525 shows a Mooney viscosity in the range typical for extrusion grades (indicator: medium-to-high Mooney; specific product literature lists Mooney values appropriate for the 525 grade).

Royalene 525 has medium molecular weight distribution, high unsaturation (high diene content, ENB-type), and low volatile matter (raw polymer specification often shows volatile matter ≤ ~0.7 wt% in product sheets).

Melt/boiling points are not applicable for a crosslinked elastomer; glass transition and thermal behavior are governed by polymer composition and are provided in compound-specific data if needed.

Royalene 525 is essentially insoluble in water and behaves like typical non-polar rubbers — it will swell in certain organic solvents and dissolve only under strong solvent/temperature conditions used for polymer analysis.

LIMITATIONS / COMPATIBILITY NOTES of ROYALENE 525:
as with all EPDMs, Royalene 525 has poor resistance to non-polar hydrocarbons (e.g., gasoline, many oils) — it is not recommended for prolonged contact with mineral oils or fuels without specific formulation modifications.
Chemical resistance of Royalene 525 is good for polar media, weathering, ozone, and many detergents, but always test finished compound formulations for specific service chemicals.

BEHAVIOR & PROPERTIES NOTES of ROYALENE 525:
Royalene 525 is highly unsaturated (due to its ENB content), which contributes to its very fast curing behavior in sulfur-vulcanized compounds.
Royalene 525's molecular weight distribution (“medium”) means it strikes a balance between processability (mixing, dispersion) and good mechanical properties.

The low volatile matter means less low-molecular weight extractables; this is good for consistent compounding behavior.
It is essentially insoluble in water (as expected for EPDM), since it's a nonpolar rubber; like other EPDMs, Royalene 525 will swell in some nonpolar or aromatic solvents under certain conditions, but typical usage does not involve dissolving it.
The friable bale form helps Royalene 525 to mix well in internal mixers (because the polymer can be broken down easily).

IDENTIFIERS AND REGULATORY NOTES of ROYALENE 525:
the trade-grade Royalene 525 chemistry typically mapped to the polymer CAS 25038-36-2 (general ethylene/propylene/diene terpolymer identifier).
As a polymer, Royalene 525 does not have a single fixed molecular formula or a single molecular weight — it is best identified by its polymer name: Poly(ethylene-co-propylene-co-5-ethylidene-2-norbornene) (or similar polymer descriptors used by suppliers).

PHYSICAL and CHEMICAL PROPERTIES of ROYALENE 525:
Polymer type: Ethylene-Propylene-Diene Terpolymer (EPDM) 
Appearance / Physical form: Solid, delivered in friable bale form. 
Color: Amber (per Knowde) 
ENB (diene) content: ~ 8.1 wt% (ethylidene norbornene) 
Ethylene / Propylene ratio: ~ 60 / 40 (w/w) 
Mooney Viscosity (unmilled): Typical value is ~ 65 ML (1+4) / 125 °C (per TDS) 
Molecular Weight Distribution: Medium (according to the manufacturer) 

Specific Gravity / Density: 0.86 g/cc (ASTM D-792) 
Volatile Matter: ≤ 0.7 wt% (maximum spec) 
Stabilizer: Non-staining (the polymer is stabilized but does not leave staining)
CAS Number: 25038-36-2 — this is the typical CAS for EPDM terpolymer. 
Molecular Formula: As a polymer, there is no fixed “small-molecule” formula, but for the monomer repeat unit it's often effectively described as C₁₄H₂₂ in regulatory / catalog data. 
Molecular Weight: Not a single defined value (because it's a polymer), but the monomer-based “formula weight” is ~ 190.32 g/mol in small-molecule equivalents. 
EC / EINECS Number: According to some supplier data for EPDM (same CAS), the EC number is 500-039-8.

FIRST AID MEASURES of ROYALENE 525:
-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 525:
-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 525:
-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 525:
-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 525:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of ROYALENE 525:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available