Stearic Acid Modified Limestone Powder is refined from natural limestone ore via ultra‑fine grinding, precision particle classification and stearic acid surface modification. The organic coating eliminates the hydrophilic surface defect of raw limestone powder, greatly improving compatibility with rubber and polymer resin matrices. As a high‑cost‑performance inorganic filler, it effectively increases product rigidity, optimizes processing performance and reduces overall production costs for vari

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Product DetailsThis modified limestone powder adopts high‑purity natural limestone as raw material. After multi‑stage crushing, ultra‑fine grinding and strict air classification, the powder achieves uniform particle size distribution with minimal coarse grit and low impurity content. The continuous dry stearic acid coating process forms a dense organic protective layer on the particle surface, realizing complete surface hydrophobic modification.

Unmodified limestone powder features strong hydrophilicity and poor affinity with organic polymers. Direct filling causes particle agglomeration, uneven mixing, increased melt viscosity, and defective surface texture on finished rubber and plastic products. Stearic acid modification changes the surface wettability of limestone particles, significantly enhancing dispersion uniformity in rubber and plastic systems. It reduces friction during extrusion and injection molding, lowers processing energy consumption, and improves production efficiency.

The product possesses stable chemical inertness, excellent whiteness and low moisture content. When applied in plastic formulations, it enhances product hardness, tensile strength and dimensional stability, reduces molding shrinkage and warpage. When used in rubber compounds, it acts as semi‑reinforcing filler to improve rubber stiffness, wear resistance and shape stability without sacrificing basic elasticity of rubber materials.

With superior cost performance compared with ultrafine calcite and talc fillers, this modified limestone powder is suitable for large‑volume filling in general‑grade rubber and plastic products. It is widely compatible with PVC, PE, PP, EVA, and various synthetic rubber systems including natural rubber, SBR and NBR.

Typical application scenarios include plastic profiles, plastic pipes, plastic injection parts, rubber hoses, rubber gaskets, rubber miscellaneous parts and ordinary polymer modified masterbatches.

Packaged in 25kg moisture‑proof woven bags with inner PE liner. Store in cool, dry and ventilated warehouse. Keep packages tightly sealed to prevent moisture absorption and powder caking. Avoid excessive pallet stacking to prevent bag damage. Wear dust‑proof protective equipment during handling and feeding operations.

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Stearic Acid Modified Limestone Powder CAS 1317-65-3, Economical Calcium Carbonate Filler for Rubber and Plastics

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.