Chlorinated Polyethylene (CPE) 135A is a highly engineered polymer additive renowned for its exceptional performance characteristics, particularly as an impact modifier for Polyvinyl Chloride (PVC). Its unique chemical structure, derived from the chlorination of High-Density Polyethylene (HDPE), imbues it with a valuable combination of toughness, flexibility, weather resistance, and flame retardancy. For professionals looking to buy CPE 135A, understanding its fundamental chemistry and manufacturing process is key to appreciating its benefits. As a leading manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. offers insights into the science behind this essential additive.

The Synthesis of CPE 135A: A Controlled Chlorination Process

CPE 135A is produced through a carefully controlled chlorination process of HDPE. During this process, chlorine atoms are substituted for hydrogen atoms along the polyethylene polymer chain. The degree of chlorination, typically around 35±1% or 35±2% for grade 135A, is critical. This substitution disrupts the crystalline structure of HDPE, transforming it into a soft, rubbery material. The absence of double bonds in the main chain, a characteristic achieved through this process, is fundamental to its excellent weatherability and thermal stability.

Key Chemical and Physical Properties Explained

The chemical structure of CPE 135A (Molecular Formula: C4H7Cl, CAS No: 63231-66-3) directly dictates its performance benefits:

  • Polarity and Compatibility: The presence of chlorine atoms introduces polarity to the polymer chain. This increased polarity enhances its compatibility with polar polymers like PVC, facilitating better blending and dispersion, which is essential for effective impact modification.
  • Saturated Backbone: Unlike unsaturated polymers that are prone to degradation from ozone and UV radiation, CPE 135A's saturated chain provides excellent resistance to weathering and ozone attack. This ensures longevity and performance stability in outdoor applications.
  • Flame Retardancy: The chlorine content contributes inherent flame-retardant properties, making CPE 135A a valuable additive for applications where fire safety is a concern.
  • Low-Temperature Performance: The amorphous nature and specific molecular structure of CPE 135A allow it to maintain flexibility at sub-zero temperatures, preventing embrittlement.
  • Good Mechanical Properties: With a typical tensile strength of ≥6.0 MPa and elongation of ≥600%, CPE 135A adds significant toughness and resilience to PVC formulations.

Why Partner with a Reputable Manufacturer for CPE 135A?

The manufacturing process for CPE 135A requires precise control over reaction conditions to achieve the desired chlorine content, molecular weight, and particle characteristics. When you buy CPE 135A, sourcing from a well-established manufacturer like NINGBO INNO PHARMCHEM CO.,LTD. is crucial for ensuring:

  • Consistent Quality: Guaranteed batch-to-batch consistency in critical parameters, ensuring predictable performance in your manufacturing processes.
  • Technical Expertise: Access to knowledgeable technical support to help optimize your formulations and troubleshoot processing challenges.
  • Reliable Supply Chain: A stable and dependable source of this key additive, crucial for maintaining uninterrupted production schedules.
  • Competitive Pricing: Leveraging manufacturing efficiencies to offer cost-effective solutions without compromising quality.

The detailed technical specifications, from its white powder appearance to its specific chlorine content and mechanical properties, underscore why CPE 135A is a superior choice for enhancing PVC products. We invite you to explore the advantages of incorporating our high-quality CPE 135A into your applications. Contact us today to discuss your requirements and experience the benefits of working with a trusted global supplier.