What are differences between EPDM Rubber Compound and basic one

The differences between EPDM rubber compound and a basic rubber compound lie in their chemical composition, properties, performance, and applications. Here's a detailed breakdown:

1. Material Composition

EPDM (Ethylene Propylene Diene Monomer):

A synthetic rubber made from ethylene, propylene, and a diene comonomer.

Offers excellent resistance to heat, ozone, weathering, and aging.

Typically sulfur- or peroxide-cured.

Basic Rubber Compound:

Could be natural rubber (NR) or any general-purpose rubber like SBR (Styrene-Butadiene Rubber).

Contains rubber polymer, fillers (like carbon black), softeners, curing agents, and other additives.

Performance varies widely depending on formulation.

2. Weather & Ozone Resistance

EPDM:

Excellent resistance to ozone, UV rays, and weathering.

Ideal for outdoor and long-term exposure.

Basic Rubber:

Usually poor to moderate resistance unless specifically modified.

Natural rubber and SBR degrade quickly under UV/ozone exposure.

3. Temperature Resistance

EPDM:

Can handle -40°C to +150°C (sometimes higher with special formulations).

Good thermal stability.

Basic Rubber:

Temperature tolerance varies.

Natural rubber: up to ~70°C continuous use.

SBR: up to ~100°C.

4. Chemical Resistance

EPDM:

Excellent resistance to water, steam, and many acids and alkalines.

Poor resistance to petroleum oils and hydrocarbons.

Basic Rubber:

Depends on type:

Natural rubber: good abrasion resistance, poor chemical resistance.

SBR: better chemical resistance than NR, still limited.

5. Mechanical Properties

EPDM:

Good flexibility, resilience, and tensile strength.

Lower abrasion resistance than natural rubber.

Basic Rubber:

Natural rubber has excellent tensile strength and abrasion resistance.

SBR offers balanced mechanical properties but can be brittle in low temperatures.

6. Cost & Availability

EPDM:

Moderate cost.

Specialized applications justify the price.

Basic Rubber:

Usually cheaper, especially NR or SBR.

Readily available for general applications.

7. Applications

EPDM:

Automotive weather seals, roofing membranes, hoses, electrical insulation, gaskets.

Outdoor applications where weather and ozone resistance are critical.

Basic Rubber:

Tires (NR, SBR), footwear, mats, general-purpose seals and gaskets.

If you are interested in our products or have any questions, please feel free to contact us and we will reply you within 24 hours.