Thiodipropionate

Thiodipropionate refers to esters of thiodipropionic acid. Thiodipropionic acid has the chemical formula S(CH2CH2COOH)2. These esters are typically formed by reacting thiodipropionic acid with an alcohol. Common examples include dilauryl thiodipropionate (DLTDP), distearyl thiodipropionate (DSTDP), and dioctyl thiodipropionate (DOTDP).

These compounds are widely used as antioxidants, particularly in polymers such as polyolefins, PVC, and rubber. They function by scavenging free radicals that can cause degradation of the polymer chains, thereby extending the material's lifespan and improving its performance under conditions of heat and light exposure. The sulfur atom in the thiodipropionate molecule plays a key role in this antioxidant activity.

Thiodipropionate esters are valued for their low volatility, good compatibility with various polymers, and effectiveness at elevated temperatures. They are often used in combination with other antioxidants, such as hindered phenols, to achieve synergistic effects and provide comprehensive protection against oxidative degradation. Applications include food packaging, automotive parts, wire and cable insulation, and agricultural films. The specific ester used often depends on the polymer type, processing conditions, and desired end-use properties.