Zinc stearate

• Zinc distearate
• Zinkdioctadecanoat

White powder

Fixed

1.1 g · cm -3

130 ° C.

• Insoluble in water and ethanol and diethyl ether
• Soluble in benzene, xylene, toluene, fats and oils

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Zinc stearate, and octadecanoic acid -zinc salt is the zinc salt of stearic acid. Thus it is one of the metal soaps.

Properties

It is a white powder with a melting point of 130 ° C, a flash point of 277 ° C and an auto-ignition temperature of 420 ° C. The molecular weight is 632.3 g / mol. Zinc stearate is not water soluble.

When heating zinc stearate, zinc oxide is formed, even when burning will emit toxic fumes and gases. In case of contact with zinc stearate to skin and eyes may become red. The inhalation of the powder can have a cough and sore throat result. Ingestion may result in nausea, vomiting and diarrhea. When working with zinc stearate is therefore a spread of dust should be avoided. It must also be paid to the risk of a dust explosion or an electrostatic charge.

Use

Zinc stearate is used as a stabilizer for emulsions.

The magic cards are used as cards zinc stearate powder, which improves the lubricity of playing cards.

Zinc stearate is used as lubricant for plastic processing. It prevents sticking of polyamide parts themselves and is an aid in Plastifizierproblemen. If the material is not Platifizierschnecke feeding correctly, this can be improved by the addition of approximately 0.2 % zinc stearate. Especially in polyamide 6.0