Antioxidant 618

Product Overview

Antioxidant 618, chemically known as O,O'-Dioctadecylpentaerythritol bis(phosphite), represents a advanced class of secondary antioxidants utilized extensively in the polymer industry. This specialized organophosphite compound is engineered to provide exceptional hydroperoxide decomposition capabilities, ensuring that polymer matrices remain stable during high-temperature processing conditions. As a critical component in modern plastic formulation, it serves as a vital protective agent against thermal oxidative degradation, preserving the mechanical integrity and aesthetic quality of finished products.

Our manufacturing process adheres to strict quality control standards, delivering a product with consistent purity and performance. The unique spiro phosphite structure of Antioxidant 618 allows for high phosphorus content, which directly correlates to its efficiency in scavenging free radicals and decomposing unstable peroxides formed during polymerization and extrusion. This makes it an indispensable choice for manufacturers seeking to extend the service life of their plastic components.

Technical Specifications

Industrial Applications

This antioxidant is primarily recommended for use in a wide variety of thermoplastic resins. It demonstrates excellent compatibility with polyethylene (PE), polypropylene (PP), polystyrene (PS), and ABS resin. Furthermore, it is highly effective in EVA copolymers, polyvinyl chloride (PVC), and polycarbonate (PC) applications. Due to its regulatory compliance profile, it is also suitable for use in materials intended for food packaging, offering a safer alternative to traditional antioxidants like BHT in specific contact applications.

For optimal performance, Antioxidant 618 is frequently employed in synergistic combination with hindered phenolic primary antioxidants or hindered amine light stabilizers (HALS). This combination creates a robust defense system against both thermal and photo-oxidative degradation. The typical dosage ranges from 0.3% to 0.5%, depending on the specific polymer substrate and processing conditions. It is particularly valued in the production of fibers, such as polyamide and polyester, as well as in coatings, inks, and complex compound formulations involving metal heat stabilizers.

Storage and Handling

To maintain product efficacy, containers should be kept tightly closed when not in use. Storage conditions must be cool and dry to prevent moisture absorption, which could lead to hydrolysis of the phosphite groups. Proper handling procedures ensure that the material retains its white flake appearance and chemical potency throughout its shelf life. We provide comprehensive Certificates of Analysis (COA) with every shipment to verify compliance with stated specifications.