Dilauryl Thiodipropionate
Overview
Dilauryl Thiodipropionate (DLTDP) is a sulfur-based antioxidant widely used in the polymer and rubber industries. It functions by scavenging free radicals, thereby preventing oxidative degradation and prolonging the service life of materials. Its compatibility with various polymers and low volatility make it a preferred choice for high-temperature applications. DLTDP is synthesized through the esterification of thiodipropionic acid with lauryl alcohol. The resulting compound is stable under normal storage conditions and exhibits excellent performance in preventing discoloration and mechanical property loss in polymers.
Physical and Chemical Properties
DLTDP appears as a white to off-white crystalline powder or flakes with a melting point range of 40-45°C. It is insoluble in water but dissolves readily in organic solvents such as acetone, ethanol, and chloroform. The compound has a molecular weight of 514.84 g/mol and is known for its thermal stability. Key chemical properties include its ability to act as a secondary antioxidant, often synergizing with primary antioxidants like phenolics. Its sulfur content contributes to its effectiveness in preventing oxidative chain reactions, making it particularly useful in polyolefins and synthetic rubbers.
Main Applications
DLTDP is primarily used as an antioxidant in polymers such as polyethylene, polypropylene, and ABS resins. It helps maintain the integrity of these materials during processing and end-use, especially in high-temperature environments. The compound is also employed in rubber products, adhesives, and lubricants to enhance durability. In the plastics industry, DLTDP is often combined with other stabilizers to create synergistic effects, improving overall material performance. Its low volatility ensures long-term protection, making it suitable for applications requiring extended shelf life or outdoor exposure.
Safety and Storage
DLTDP is generally considered safe for industrial use but requires standard precautions. Avoid inhalation of dust and direct skin contact by using gloves and masks. The compound is non-toxic but may cause mild irritation upon prolonged exposure. Storage should be in a cool, dry place, away from direct sunlight and moisture. Properly sealed containers are recommended to prevent contamination and degradation. Shelf life is typically several years under optimal conditions.
B2B Procurement Guide
When procuring DLTDP, verify the CAS number (123-28-4) to ensure product authenticity. Check for supplier certifications such as ISO or REACH compliance to guarantee quality. Purity levels typically range from 98% to 99.5%, with higher grades commanding premium prices. Bulk purchases often come with cost advantages, so consider volume needs. Reliable suppliers provide technical data sheets (TDS) and material safety data sheets (MSDS) for reference. Sample testing is advisable for first-time buyers to confirm suitability for specific applications.
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