Acmec Activator ZnST-75 Zinc Stearate Activator Active Ingredient Zinc Stearate Zinc Stearate Molecular Formula: Zn(C??H??COO)? Molecular Weight M.W.: 632.30 CAS No.: 557-05-01 EINECS No.: - Properties: It is mainly used as an activator for rubber vulcanization accelerators and a heat stabilizer for chlorinated polyethylene. It is also the best physical plasticizing peptizer for natural rubber. As a multi-purpose rubber processing aid, it can improve the reversion resistance and heat resistance of vulcanizates in rubber applications, and has both internal and external lubrication and dispersion functions. It can be used in the mastication and mixing processes of natural rubber and synthetic rubber. This product has excellent compatibility with rubber, does not bloom, and has dual functions of peptization and lubrication. It can improve rubber processing technology, increase the qualification rate and dimensional stability of rubber products, reduce energy consumption, and improve mixing efficiency. When used in rubber processing, it can improve the extrusion performance of rubber compounds, increase extrusion speed and smoothness of semi-finished products. Typical dosage: 3 ~ 5phr as activator, 2 ~ 4phr as processing aid Typical Data: Melting Point: ≥120℃ Content: ≥97% Zn: ≤10.3-11.3% Free Fatty Acid: ≤0.8 % Loss on Drying: ≤0.8 % 45μm Sieve Residue: ≤0.5 % Highly Dispersed Masterbatch Product Name Active Content % Color Filtration (μm) Carrier Type Mooney Viscosity ML(1+4) Typical Value at 50℃ Density (g/cm3) Typical Value Actmix? ZnST-75 75 White 140 EPDM/EVM 50 1.25 *The carrier type can be customized according to customer requirements. In addition to EPDM/EVM carriers, nitrile rubber, styrene-butadiene rubber, chlorinated polyethylene rubber and epichlorohydrin rubber carriers are also supported. Safety and Toxicity: Please refer to the relevant product safety data sheet (MSDS); Packaging and Storage: 25 kg per carton with polyethylene inner bag, 600 kg per pallet; Store in a cool, dry place, sealed in original packaging for 1 year. Compared with traditional powdered zinc stearate, Acmec ZnST-75 has the following advantages: The raw material zinc stearate is fully screened through 63μm sieve, and no dust will fly when processed into masterbatches, which eliminates the harm of zinc to human body and protects the health of workers; Masterbatch ZnST-75 is pre-dispersed with rubber carrier, so it is stable during long-term storage and will not absorb moisture under the influence of external conditions; The masterbatch does not agglomerate at room temperature, which makes batching convenient and accurate; It has low Mooney viscosity at low temperatures such as 50℃, which improves the dispersion quality of zinc stearate in the compound and prevents white spots from appearing on the product; The masterbatch is filtered during granulation, contains no impurities, will not clog the screen during extrusion products, reduces the reject rate and improves production efficiency; It has good compatibility with different rubbers.