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1. Overview & Definition:
Polymer-Grade
Stearic Acid is a high-purity, distilled stearic acid
specifically used in the polymer and plastic industries. It is a long-chain
saturated fatty acid (C18:0) obtained from vegetable oils (like palm) or
animal fats through fractional distillation to achieve high
consistency and purity.
2. Properties:
- Appearance:
White, waxy solid (flakes, beads, or powder)
- Purity:
Typically ≥98% stearic acid (C18:0)
- Melting
Point: 67–70°C
- Solubility: Insoluble
in water, but soluble in organic solvents, oils, and waxes
- Odor: Mild,
fatty odor
3. Applications in Polymer & Plastics
Industry:
- PVC
& Plastic Processing: Acts as a lubricant, release agent,
and processing aid in plastic and rubber formulations.
- Masterbatch
& Compounding: Used as a dispersion aid for
pigments, fillers, and stabilizers.
- Rubber
Industry: Improves molding, extrusion, and
anti-tack properties.
- Polymer
Additives: Enhances thermal stability and
processability.
- Foam
Production: Used in polyurethane foam as a
processing additive.
4. Manufacturing & Compliance:
- Derived
from vegetable-based or tallow-based sources.
- Complies
with industry standards for polymer applications.