Zinc stearate is a white powder, insoluble in water, soluble in heat It contains organic solvents such as ethanol, benzene, toluene, and turpentine; it decomposes into stearic acid and corresponding salts when exposed to acids; it is a fire hazard under dry conditions, with an autoignition point of 900°C; it is hygroscopic.
There are two production methods of zinc stearate: water method and melting method. Generally speaking, zinc stearate produced by water method is acidic. , the melting method is alkaline. The following supplies zinc stearate to let you know about it:
The water method is also called the wet method. Under the condition of water as the medium, add Catalyst, control a certain temperature and pressure, then add metal hydroxide, replace the metal ions on the catalyst through the catalyst, and then replace it on the stearic acid through the catalyst itself, thereby achieving the purpose of generating metal salts. The catalyst undergoes post-processing and recycling. The stearate is centrifuged, dried and ground to obtain products with a mesh size of 200-600 that meet industry standards. In water production, there is usually a slight excess of stearic acid, so the finished product is acidic after the reaction.
The melting method, also known as the dry method, refers to directly adding metal oxides to molten stearic acid (in the presence of a catalyst) to control Under certain temperature, pressure and stirring speed, stearate is obtained through reaction. Due to the presence of catalysts, the general reaction results of products produced by dry methods can be completely reacted, with a slight excess of metal oxides, so the products appear alkaline when tested.
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