Chlorinated Polyethylene (CPE) rubber is a high-performance halogenated polymer widely celebrated for its outstanding oil resistance, flame retardancy, low-temperature flexibility, chemical corrosion resistance, and excellent compatibility with various rubber and plastic materials. It is extensively applied in wire and cable insulation & sheaths, waterproof membranes, rubber hoses, conveyor belts, and modified plastic products. However, CPE tends to release hydrogen chloride (HCl) during high-temperature compounding, vulcanization, and long-term service, triggering autocatalytic molecular chain degradation, material aging, and equipment corrosion. High-purity Magnesium Oxide (MgO) serves as a core indispensable additive for CPE compounding, perfectly solving the inherent application pain points of CPE and greatly boosting processing stability and finished product durability.

Core Functions of MgO in CPE Compounding

As a high-efficiency acid scavenger, thermal stabilizer and vulcanization regulator tailored for halogen-containing rubber, MgO delivers multi-dimensional performance upgrades for CPE rubber throughout the production and service cycle, outperforming traditional additives in stability and compatibility.

First of all, MgO achieves efficient HCl neutralization and blocks polymer degradation. During CPE thermal processing and long-term aging, continuous HCl precipitation will accelerate molecular chain cracking and cause yellowing, brittleness and performance attenuation. MgO can rapidly react with free HCl to generate stable inert substances, effectively terminate the autocatalytic degradation reaction, fundamentally prevent CPE material aging and failure, and protect production equipment from acid corrosion.

Secondly, MgO optimizes CPE vulcanization system and improves processing safety. Different from zinc oxide which easily causes scorch and excessive curing speed, MgO features moderate activity and stable vulcanization regulation performance. It can effectively adjust the curing rate of CPE compounds, avoid premature vulcanization and scorching during mixing and molding, extend safe processing time, and ensure uniform crosslink density and stable batch quality of CPE products. It is the preferred regulator for high-precision CPE compound formulation.

In addition, MgO enhances CPE’s thermal stability and mechanical properties. It significantly improves the heat aging resistance and long-term weatherability of CPE rubber, maintaining stable tensile strength, elasticity and dimensional stability under long-term high-temperature working conditions. Meanwhile, MgO acts as a functional reinforcing filler, reducing product shrinkage and porosity, improving the compactness and structural rigidity of CPE products, and extending the overall service life of finished parts.

Furthermore, MgO synergistically improves flame retardant performance. Combined with flame retardants such as ATH and MDH, MgO can optimize the flame retardant system of CPE, suppress smoke generation and combustion dripping, help CPE products meet higher industrial flame retardant safety standards, and is widely used in high-standard cable and fire-resistant rubber products.

Key Performance Advantages

• Efficient Acid Removal & Anti-aging: Eliminates HCl acidic substances, blocks CPE autocatalytic degradation, and solves common problems such as brittleness, yellowing and performance decline of CPE products.

• Excellent Processing Stability: Moderate activity prevents scorching, stabilizes vulcanization speed, adapts to continuous mass production of CPE compounds, and improves production yield.

• Superior Thermal & Dimensional Stability: Greatly enhances high-temperature resistance and weather durability, reduces molding deformation and shrinkage, and ensures consistent product quality.

• Flame Retardant Synergy: Cooperates with halogen-free flame retardants to upgrade flame retardant and smoke suppression performance, meeting strict safety requirements for cables and industrial rubber parts.

• High Compatibility & Environmental Friendliness: Perfectly compatible with CPE matrix and various additives, no adverse effect on original rubber flexibility and toughness, low toxicity and eco-friendly, suitable for high-end environmental protection product formulas.

Typical CPE Application Scenarios

MgO-modified high-stability CPE compounds are widely used in high-demand industrial fields: power cable insulation and sheath materials, waterproof and anticorrosive rubber membranes, high-pressure resistant rubber hoses, flame-retardant conveyor belts, plastic modified toughening materials, and chemical corrosion-resistant rubber accessories. It provides reliable long-term stability guarantee for CPE products in high-temperature, outdoor, corrosive and other harsh working environments.

Final Verdict

For CPE manufacturers pursuing stable processing performance, anti-aging durability and high-standard safety performance, high-purity magnesium oxide is a cost-effective and irreplaceable functional additive. It perfectly solves the inherent degradation and processing pain points of CPE rubber, empowers CPE products with stronger environmental adaptability and higher industrial application value, and has become a standard core additive for premium CPE compound formulas.

Our Company Strength & Supply Resources

We are a professional MANUFACTURER, IMPORTER and DISTRIBUTOR specializing in rubber chemical additives and industrial fine chemicals, with stable global supply chains, reliable upstream partners and exclusive distribution qualifications to provide one-stop, high-quality chemical solutions for the rubber and polymer industry.

Key Products & Authorized Partners

• MgO & MDH: Strategic cooperation with NIKO CHEM (Russia) and Jiangsu Zehui, supplying high-purity grade products specially formulated for EPDM rubber application.

• ATH: Long-term partnership with KMT Industrial (HK) Limited, providing high-performance flame retardant additives for rubber and plastic materials.

• Oleo Chemicals & Surfactants: Authorized supplier for VVF India Ltd., PT Dua kuda and Esteem Industries Pvt. Ltd., covering diversified surfactant and oleochemical product series.

Authorized Distributor For

Sunkem Group, Mahaveer Surfactants, Indo Amine Ltd., Jeevika Specialities Pvt. Ltd.

With abundant product resources, strict quality control and stable supply capacity, we can provide customized additive solutions and bulk stable supply for global rubber manufacturers, supporting long-term and win-win cooperative partnerships.