The use of stearate in petrochemical polyolefin:
1) lubrication, in linear low density polyethylene (LDPE) film, zinc stearate plays a lubricating role in blow molding film to prevent melt rupture. In the use of polystyrene (PS), zinc stearate requires high transparency, good dustproof performance, and is mostly used in flake or granular form;
2) Used as an acid remover/acid absorbent, calcium stearate can neutralize the acidic residues generated by the polypropylene (PP) reaction process, and zinc stearate can significantly improve the color stabilizer of high density polyethylene (HDPE) in catalytic polymerization;
3) Compound antioxidant or premix: calcium stearate or zinc stearate mixed with antioxidant and other additives granulation, and then supplied to the petrochemical plant directly added;
4) Uniform dispersion, reduce adhesion, good fluidity of zinc stearate, adding zinc stearate to the expanded polystyrene (EPS) coating agent can reduce adhesion to other additives, uniform coating;
5) In styrene-butadiene-acrylonitrile copolymer (ABS) plays the role of lubrication, anti-viscosity and dispersion, magnesium stearate and glycerol stearate or magnesium stearate used alone, magnesium stearate is an internal slip agent and external slip, the main role is to reduce the friction between polymer particles and small molecules during melt transport. Therefore, it can reduce the energy consumption of plasticization, reduce the melt viscosity, improve the flow performance, increase the operation efficiency of the processing equipment, and enable the processing to run under moderate conditions.
Products involved: stearate and nucleating agent.
