Létt steypuaukefni | Afkastamikil froðuefni fyrir frumusteypu
Sinksterat er smur- og losunarefni sem hægt er að nota í plast, gúmmí, húðun, blek, málningu, hitapappír og snyrtivörur. It can be used to increase the smoothness and thickness of products, reduce the friction coefficient and improve the texture.
Uses for zinc stearate:
Almennt, the use of zinc stearate in products is as a release agent, heat stabilizer, lubricant and grease. It is widely used in the plastics, gúmmí, coatings and inks industries.
Í gúmmíframleiðslu, zinc stearate can be used as an internal lubricant and dusting agent and as an activator for vulcanization. It also can be used in powdered rubber manufacturing as a mold release lubricant.
The invention discloses a method for preparing a stable aqueous dispersion of nanometer sized zinc stearate particles. This method is particularly suitable for coating toner particles on a surface. The dispersion can be prepared with a relatively simple process that does not require the use of harsh organic solvents.
One way to prepare a stable aqueous dispersion is to melt zinc stearate in water and then add a surfactant. This can be done in a controlled manner by controlling the temperature and pressure of the water.
Another method to prepare a stable aqueous zinc stearate emulsion is to agitate the mixture of metal-containing stearate with water and a solution of a zinc salt, preferably in a high shear mixing process. The zinc salt may be a commercial stearic acid, an imide, or a zinc-containing polyamide.