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Dongguan Hanwei Technology Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. Its products are mainly used in petrochemical, rubber and plastics, coatings, papermaking and other fields. The main products are zinc stearate , calcium stearate , magnesium stearate , other fatty acid salts, fatty acid esters, water-based zinc stearate, water-based calcium stearate, wood-plastic lubricants, PE wax, wax emulsion and Various rubber additives, etc.
Physical Properties
Zinc stearate has several notable physical properties. It is a fine, fluffy powder with a density of around 1.1-1.2 g/cm3. It is insoluble in water but dissolves in most organic solvents. The melting point of zinc stearate is approximately 120-130°C, and it decomposes upon further heating. These physical properties make zinc stearate suitable for various processing techniques and applications.
Chemical Composition and Structure
Zinc stearate is chemically composed of zinc ions (Zn2+) and stearate ions (C18H35O2-). It has a molecular formula of Zn(C18H35O2)2 and a molar mass of approximately 632.3 g/mol. Structurally, it forms a crystalline lattice with the zinc ions surrounded by stearate ions. Understanding its chemical composition and structure provides insights into its properties and applications.
Importance in the Paint and Coatings Industry
In the paint and coatings industry, zinc stearate acts as a flatting agent, imparting a matte finish to the final product. It also serves as a rheology modifier, improving the viscosity and preventing settling of pigments. Zinc stearate's ability to disperse pigment particles evenly is crucial for achieving consistent color and quality in paint formulations.
Role as a Lubricant
One of the primary applications of zinc stearate is as a lubricant. It acts as a release agent, reducing friction between surfaces and preventing them from sticking together. Zinc stearate is often added to rubber and plastic compounds during processing to enhance flow properties and prevent sticking to molds and equipment. Its lubricating properties make it an essential ingredient in various industrial processes.
Frequently Asked Question
Do you have any question?
Yes, zinc stearate can be used in food packaging materials. It is considered safe for indirect food contact applications and is commonly used as a release agent or anti-caking agent in food packaging processes.
Zinc stearate is generally considered to be environmentally friendly. It is biodegradable and does not persist in the environment. Additionally, its non-toxic nature and low risk of bioaccumulation make it a preferred choice over certain alternative additives in many applications.
Its primary function is to provide specific technical properties rather than serve as a significant source of dietary zinc.
Zinc stearate is considered safe for use in cosmetics and personal care products. It has a long history of use and is generally recognized as safe by regulatory authorities.