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First Rubber MBT-75 is a pre-dispersed thiazole accelerator masterbatch with 75% 2-mercaptobenzothiazole active content. It provides very fast cure speed and a low vulcanization temperature of approximately 125°C, making it ideal for efficient, high-productivity rubber processing. Compatible with NR, SBR, NBR, EPDM, and CR. Non-staining and non-discoloring. Can be used alone or synergistically with secondary accelerators (guanidines, thiurams, dithiocarbamates). Also acts as a retarder in sulfur-free CR compounds. Dosage: as primary 0.5-3.0 phr; as secondary 0.2-0.8 phr.
Moisture ruining your continuous vulcanization line? First® CaO‑80GE absorbs water, eliminates pinholes and blisters, and improves foam bubble uniformity. Dust‑free granules for salt bath, microwave, or hot‑air CV lines. No cure interference.
First Rubber SI-69-50E is a pre-dispersed, 50% active sulfur-containing silane coupling agent based on bis(triethoxysilylpropyl) tetrasulfide (TESPT). It acts as a critical molecular bridge, chemically bonding inorganic silica (SiO₂) fillers to the organic rubber matrix via its ethoxy groups and sulfur chain. This interaction significantly enhances filler dispersion and reinforcement, leading to reduced rolling resistance, improved abrasion resistance, and increased tensile strength in the final vulcanizate. The pre-dispersed masterbatch form ensures dust-free handling and superior compatibility, eliminating moisture absorption issues common with liquid silanes.
First Rubber CTP-80 is a pre-dispersed anti-scorching agent masterbatch (PVI-80) with 80% N-cyclohexylthiophthalimide. It delays premature vulcanization during mixing and processing without affecting final cure time. Compatible with sulfenamide (CBS, TBBS) and thiazole (MBT, MBTS) accelerators. Dust-free granules improve safety and dispersion. Non-staining, suitable for NR, SBR, NBR, EPDM
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