Chlorinated Polyethylene CPE 135A

Product Overview

Chlorinated Polyethylene CPE 135A is a general-purpose high-molecular-weight impact modifier manufactured via chlorination of high-density polyethylene (HDPE). As a saturated polymer material, it appears as a non-toxic, odorless white powder, specially developed to significantly enhance the toughness and low-temperature impact resistance of rigid PVC formulations. It has been widely recognized as a core additive in the global PVC profiles, pipes, electrical conduits and siding manufacturing industries.

Key Specifications

Item	Value	Test Method
Chlorine Content	35±1%	ISO 7725
Volatile Matter	≤ 0.5%	ISO 1269
Hot Fusion	≤ 2.0 J/g	DSC
40 Mesh Residue Rate	≥ 98%	--
Shore Hardness A	≤ 60	ISO 7619
Thermal Decomposition Temperature	≥ 165℃	--
Tensile Strength	≥ 8.5 MPa	ISO 37
Elongation at Break	≥ 600%	ISO 37
Whiteness (E457)	≥ 80	--
Impurity Particles	< 15 pcs/100g	--

Core Features

1. ‌Excellent Low-Temperature Toughness‌: Maintains stable flexibility even at -30℃, effectively preventing rigid PVC products from cracking in cold outdoor environments.

2. ‌Superior Weathering Resistance‌: Saturated molecular structure delivers outstanding ozone, aging and chemical corrosion performance, extending the service life of end products for more than 10 years.

3. ‌Reliable Flame Retardancy‌: Contains chlorine element with anti-dripping property during combustion, can be compounded with antimony flame retardants, chlorinated paraffin and Al(OH)₃ to achieve cost-effective flame retardant solutions.

4. ‌Good Processing Compatibility‌: Forms a stable "PVC sea, CPE island" micro-phase separation structure in PVC systems, promotes uniform plasticization and improves overall processing performance.

5. ‌Eco-Friendly Compliance‌: Free of heavy metals and PAHs, fully meets global environmental regulations for building materials, wire and cable applications.

Recommended Applications

· PVC door and window profiles, exterior siding, fence panels

· PVC water supply and drainage pipes, electrical conduits

· ABS modification, magnetic material processing and other polymer blending scenarios

Suggested Dosage

For rigid PVC products, the recommended addition level is 3-8 phr. At this dosage range, the impact strength of PVC formulations can be significantly improved while maintaining good tensile strength balance, avoiding unnecessary cost increase caused by excessive addition.

Packaging & Storage

· ‌Packaging‌: 25kg net weight per kraft paper bag with inner PE liner，18-20tons/20'GP

· ‌Storage‌: Keep in a cool, dry and well-ventilated warehouse, avoid direct sunlight and moisture

· ‌Shelf Life‌: 12 months under recommended storage conditions