Metal stearate is a type of additive with multiple functions used in many products, and can bring many benefits to polymer products. Common stearates include zinc stearate, calcium stearate, magnesium stearate, etc.
Application of stearate as acid neutralizer in polyolefins:
Stearate as acid neutralizer in polyolefins Direct contribution to the color stability and corrosion protection of polyolefins: Generally speaking, acid capture agents are soluble or easily dispersible alkali compounds that can react with acid catalyst residues. Organic materials such as metal stearates meet these requirements and are often added to polyolefins to neutralize acid catalyst residues from Ziegler-Natta catalysts. In polyethylene (PE), the most widely used metal stearates are calcium stearate (CaSt) and zinc stearate, while in polypropylene (PP), calcium stearate is the most widely used .
Calcium stearate as acid capture agent: After adding stearic acid metal salt to polyolefin, the color retention ability has been greatly improved after several compound extrusions; the addition of hard When adding fatty acid salts, the system achieved excellent color retention.
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