At NINGBO INNO PHARMCHEM CO.,LTD., we are committed to providing clear and comprehensive information about the chemical raw materials we offer. Zinc Stearate (CAS No. 557-05-1) is a widely used industrial chemical with a distinct set of properties that dictate its diverse applications. This article aims to provide a foundational understanding of its chemical characteristics and essential manufacturing considerations.

Chemically, Zinc Stearate is the zinc salt of stearic acid, with the molecular formula Zn(C17H35COO)2. It typically presents as a fine, white, bulky powder. One of its most notable physical properties is its insolubility in water and ethanol, which contributes to its effectiveness in applications requiring water repellency. However, it is soluble in hot organic solvents and acids, a property that can be leveraged in certain manufacturing processes or cleaning procedures.

Key functional properties of Zinc Stearate include:

  • Lubricity: It acts as an excellent internal and external lubricant, reducing friction in polymer processing and other mechanical applications.
  • Release Properties: It forms a barrier that prevents materials from sticking to molds or other surfaces, crucial in plastics and rubber manufacturing.
  • Thermal Stability: Zinc Stearate can withstand elevated temperatures without significant degradation, making it suitable for high-temperature processing of polymers like PVC.
  • Dispersing Ability: It aids in the uniform dispersion of pigments and other additives within a matrix, leading to better product consistency.
  • Hydrophobicity: Its water-repellent nature is advantageous in applications requiring moisture resistance.

For manufacturers looking to buy Zinc Stearate powder, understanding its specifications is vital. These typically include parameters such as Zinc content, melting point (usually around 118-121°C), free fatty acid content, moisture content, and particle size distribution. The purity and physical form of the Zinc Stearate can significantly impact its performance in specific applications.

Manufacturing considerations for Zinc Stearate often involve reacting stearic acid with a zinc source, such as zinc oxide or zinc sulfate, under controlled conditions. The process parameters, including temperature, reaction time, and stoichiometry, are critical to achieving the desired product quality and purity. Post-reaction processing typically involves filtration, washing, drying, and milling to obtain the final powder or flake form.

The safety profile of Zinc Stearate is also an important consideration. While generally considered non-toxic and safe for many industrial applications when handled properly, inhalation of fine dust can cause respiratory irritation. Therefore, appropriate personal protective equipment and ventilation are recommended during handling.

In conclusion, NINGBO INNO PHARMCHEM CO.,LTD. provides Zinc Stearate as a high-performance chemical additive whose utility spans numerous industries due to its unique combination of lubricating, releasing, stabilizing, and hydrophobic properties. A thorough understanding of its zinc stearate chemical properties and manufacturing nuances is key to leveraging its full potential effectively.