Calcium Stearate Release Agent CAS 1592‑23‑0 is fine‑particle calcium salt of stearic acid. This multifunctional metallic soap provides balanced internal‑external lubricating property, auxiliary mold‑release effect and early‑coloring improvement for PVC and polyolefin systems. In rigid and flexible PVC processing, it suppresses initial thermal degradation and delays early discoloration of melt under high processing temperature. It reduces melt viscosity inside polymer matrix, meanwhile forms thi

Product Detail

Product Detail Page: Calcium Stearate is produced via wet or dry synthetic reaction of stearic acid and calcium‑based raw materials. Subsequent washing, dehydration, drying and fine‑grinding procedures yield finished white powder. Each production batch is inspected for calcium content, melting range, free fatty acid, moisture, particle‑size distribution, lubricating efficiency and thermal performance to ensure stable processing behavior for PVC and polyolefin compounding.

PVC and polyolefin processing faces notable thermal‑processing risks. PVC molecular chain is susceptible to thermal cleavage at elevated processing temperature. Without suitable auxiliary stabilizer‑lubricant, the material develops early yellowing and discoloration immediately after melting, which damages surface appearance of final PVC sheets and profiles. Insufficient internal lubrication increases melt viscosity, raises torque of extruder and calendar equipment. When external lubrication capacity is inadequate, molten polymer adheres to hot calendar rolls and die lips. Gradual accumulation of degraded polymer residues forms stubborn plate‑out deposits. These deposits generate surface streaks, spots and gloss irregularities on finished products, and force frequent machine shutdown for cleaning. For filled modified polyolefin formulations, poor powder fluidity may result in uneven feeding and inconsistent extrusion output.

When calcium stearate powder is homogeneously blended into PVC or polyolefin compound at recommended dosage during high‑speed mixing, it gradually melts under processing heat and mechanical shear. Inside the polymer matrix, the internal‑lubricating function reduces intermolecular friction of molten resin, lowers melt viscosity and decreases processing torque. It interacts synergistically with PVC thermal stabilizer systems to restrain initial thermal decomposition and effectively improve early‑coloring performance. A portion of molten calcium stearate migrates toward the contact boundary between hot polymer melt and metallic equipment surfaces, forming a continuous slippery boundary film. This external lubricating layer alleviates sticking to calendar rolls and die lips, suppresses plate‑out buildup, and delivers auxiliary mold‑release property for injection‑molding production of polyolefin components.

Precise dosage control is essential for formulation development. Under‑dosage brings insufficient internal‑external lubrication, poor early‑coloring resistance, severe roll sticking and progressive plate‑out. Excessive loading will induce surface blooming on finished plastic articles and may reduce the mechanical strength of filled modified compounds. Laboratory compounding and processing trials are strongly recommended before large‑scale mass production. Calcium stearate can be combined with calcium‑zinc stabilizers, auxiliary heat stabilizers, antioxidants and mineral fillers within PVC and polyolefin formulations.

For compounding operations, calcium stearate fine powder is added in the high‑speed mixer together with resin, stabilizers and fillers prior to PVC calendaring, extrusion or polyolefin twin‑screw pelletizing and injection molding.

Protect the powder from moisture and foreign particulate contamination. Humid storage will trigger powder caking.

Major application fields: balanced internal‑external lubricant and early‑coloring improving additive for rigid‑PVC profiles, pipes and calendered sheets; anti‑plate‑out processing lubricant for flexible PVC compounds; mold‑release and flow‑improving auxiliary for mineral‑filled modified polyolefin extrusion and injection‑molded goods.

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

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Calcium Stearate Release Agent CAS 1592-23-0, Internal External Lubricant for PVC Polyolefin Early Coloring Improvement

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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.