High‑Purity PETS Release Agent CAS 115‑83‑3 is refined pentaerythritol stearate manufactured by advanced purification process. It is designed specifically for transparent engineering plastic formulations. Thanks to extremely low residual impurities, this high‑purity grade features suppressed thermal decomposition and low volatility at high processing temperatures. It offers combined internal and external lubricating and releasing performance. The internal lubrication improves melt fluidity, whil

Product Detail

Product Detail Page: High‑Purity PETS release agent is produced via esterification of pentaerythritol and stearic acid, followed by multi‑stage distillation and de‑odorization purification. Flaking or granulation is completed under filtered clean‑air conditions. Each production batch undergoes strict inspection for acid value, saponification value, melting point, thermal weight loss, and haze‑inducing tendency. Rigorous impurity control ensures that this grade meets the quality requirements for transparent and optical‑relevant engineering‑plastic compounding.

Transparent engineering plastics such as PC, PMMA and PET have very stringent requirements for processing auxiliaries. Ordinary standard‑grade PETS contains relatively high residual impurities. At high processing temperatures, these impurities are prone to thermal decomposition and volatilization. Volatile decomposition products may form micro‑bubbles, smoke, surface fogging and permanent haze inside transparent molded components, ruining optical performance. Insufficient internal lubrication causes high melt viscosity, increased shear heat and local thermal degradation of the transparent resin. Poor external release leads to sticking inside precision molds, resulting in surface scratches on clear parts and frequent shutdowns for mold cleaning.

When blended uniformly with transparent resin at the recommended dosage, high‑purity PETS disperses evenly within the polymer matrix. Under heat and shear during plasticizing, the internal lubricating fraction lowers intermolecular friction of molten PC, PMMA or PET, improving melt flow and restraining shear‑related over‑heating. Meanwhile, a thin slippery boundary layer gradually forms at the interface between hot melt and metallic mold or die surfaces. This boundary film reduces resin‑metal adhesion, facilitates smooth demolding of intricate transparent components, and effectively suppresses plate‑out deposits on tooling. Owing to the advanced purification treatment, thermal‑induced volatilization is kept at a minimum level, greatly lowering the risk of haze and micro‑defects on finished transparent plastic articles, and supporting consistent high‑gloss surfaces.

Precise dosage control is critical. Under‑dosage cannot deliver sufficient lubrication and releasing effect, resulting in high processing torque and mold‑sticking defects. Excessive loading may trigger surface blooming and reduce the transparency of PC, PMMA and PET products. Formulators are strongly advised to run laboratory compounding and injection molding trials prior to formal mass production. This high‑purity PETS can be compounded together with high‑temperature antioxidants for transparent engineering‑plastic systems.

For compounding operations, add granular or flaked high‑purity PETS during high‑speed premixing with base resin and antioxidants before extrusion pelletizing or direct injection molding.

Keep the product sealed against moisture and foreign particulate contamination. Long‑term hot storage will gradually accelerate ester aging, which negatively affects anti‑volatility performance.

Major application fields: lubricant and release additive for transparent PC optical components; high‑gloss processing aid for PMMA sheet and injection‑molded parts; low‑volatility releasing auxiliary for transparent PET engineering‑plastic compounding.

Store the product in tightly‑sealed original bags within 15‑30℃, maintain dry storage and avoid direct sunlight.

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High-Purity PETS Release Agent CAS 115-83-3, Transparent PC PMMA PET High-Gloss Low-Volatility Engineering Plastic

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.