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Tired of sulfur bloom ruining your tires or hoses? First® IS90‑80 high‑thermal‑stability insoluble sulfur prevents migration to the surface. Bloom‑free, better adhesion to steel cord and fabric, consistent cure. 1:1 replacement for ordinary sulfur.
First Rubber MAC-1489 is a highly effective anti-yellowing accelerator masterbatch on EPDM carrier. Specifically designed for white and light-colored rubber goods, it delivers outstanding yellowing resistance, achieving grades 4.0 to 5.0 under stable formulation conditions. The product offers a moderate vulcanization speed, with wear resistance, tensile strength, and tear resistance comparable to standard accelerator systems. MAC-1489 is non-staining and non-discoloring, ensuring consistent color stability throughout the product's life. A key advantage is its excellent scorch resistance, allowing compounded rubber to remain stable at room temperature for 3-5 days—overcoming a common limitation of conventional yellowing-resistant accelerators. Recommended dosage: 1.0-3.0 phr with 0.5-2.5 phr sulfur.
First Rubber EM33-75 is a pre-dispersed composite accelerator masterbatch specially formulated for ethylene propylene diene monomer (EPDM) compounds. As a comprehensive accelerator, it eliminates the need for complex blending of multiple single accelerators, simplifying the mixing process and reducing the risk of compounding errors. EM33-75 offers an excellent balance of fast cure speed, long scorch time, and outstanding vulcanization flatness. Its non-blooming, non-staining, and low-odor characteristics make it particularly suitable for light-colored and white rubber goods such as automotive weather seals, hoses, gaskets, and shoe soles. The pre-dispersed masterbatch form ensures dust-free handling, excellent dispersion, and consistent performance. Recommended dosage: 2.0-3.5 phr.
Yellowing ruining your white or light‑colored rubber exports? First® MAC‑1489 is a high‑efficiency anti‑yellowing accelerator masterbatch. Delivers yellowing resistance grade 4.0–5.0, moderate cure speed, excellent scorch safety (3–5 days storage), non‑staining. Perfect for shoe soles, sidewalls, seals, toys.
Need ultra‑fast cure without nitrosamine risk or scorch? First® ZBEC‑75 offers best‑in‑class scorch resistance among zinc dithiocarbamates. No nitrosamines, works in black or light‑colored compounds. Ideal with TBBS‑80 for eco‑friendly systems.
Need to replace TMTD but worried about nitrosamines or scorch? First® TBzTD‑75 is a direct, drop‑in replacement. No nitrosamines, longer scorch time, same cure speed. Works in NR, SR, PVC, and CR compounds. REACH & TRGS 552 compliant.
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