CPE 135A is a chlorinated polyethylene elastomer containing around 35% chlorine. It serves as both a PVC impact modifier and a base polymer for rubber compounds. Known for its excellent resistance to weathering, oils, chemicals, and flames, CPE 135A is used in a wide range of indoor and outdoor plastic and rubber products.
| Property | Typical Value |
|---|---|
| Chlorine Content | 35 ± 2% |
| Heat of Fusion | ≤ 2.0 J/g |
| Volatile Matter | ≤ 0.3% |
| Shore A Hardness | 55–65 |
| Tensile Strength | ≥ 8 MPa |
| Elongation at Break | ≥ 600% |
| Density | 1.20 ± 0.05 g/cm³ |
| Challenge | CPE 135A Advantage |
|---|---|
| Outdoor aging and cracking | Resists UV and ozone degradation |
| Flammability concerns | CPE helps meet flame retardant standards |
| Impact failure in cold weather | Improves flexibility and impact at low temperatures |
| Blending with other polymers | Compatible with PVC, ABS, PE, and more |
Q1: What is the recommended dosage of CPE 135A in PVC?
Usually 8–15 phr for rigid PVC depending on impact requirements.
Q2: Is CPE 135A used alone in rubber formulations?
Yes, it can be used as a base polymer for rubber compounds or blended with other rubbers.
Q3: How does CPE compare to MBS or Acrylic modifiers?
CPE offers better weather and flame resistance, though MBS gives higher clarity.
