Chemicals for the Rubber & Tyre Industry
Zinc oxide is the single most critical chemical in rubber vulcanisation — the indispensable activator in the sulphur curing system without which consistent mechanical properties cannot be achieved. MITCHEM supplies rubber-grade and tyre-grade zinc oxide, calcium stearate as a processing lubricant, and magnesium stearate as a release agent.
Key Products6+
ZnO Purity97% – 99.5%
FunctionActivator, Lubricant, Release
Tyre GradeAvailable
Key Products for Rubber & Tyres
Each product shown with its specific role in rubber & tyres applications. Click any product for full specifications, grades, and quote form.
Zinc Oxide
CAS: 1314-13-2 | HS: 28170010
ZnO | 81.39 g/mol
Zinc Oxide (3–5 phr) activates the sulphur-accelerator system by forming reactive zinc accelerator complexes that initiate and control crosslinking. Without ZnO, rubber cure rate, crosslink density, and mechanical properties would be severely compromised.
Calcium Stearate
CAS: 1592-23-0 | HS: 29157090
C₃₆H₇₀CaO₄ | 607.02 g/mol
In rubber compounding, Calcium Stearate serves as an internal lubricant reducing mill sticking during open-mill mixing and calendar operations.
Zinc Stearate
CAS: 557-05-1 | HS: 29157090
C₃₆H₇₀O₄Zn | 632.33 g/mol
Zinc Stearate functions as a mould release agent — dusted on compound surfaces to facilitate clean ejection of moulded parts including automotive seals, O-rings, and tyre components.
Magnesium Stearate
CAS: 557-04-0 | HS: 29157090
C₃₆H₇₀MgO₄ | 591.24 g/mol
Magnesium Stearate is used as an anti-tack dusting agent for uncured rubber sheets, preventing them sticking together during storage before final vulcanisation.
Barium Hydroxide
CAS: 17194-00-2 | HS: 28259085
Ba(OH)₂ | 171.34 g/mol
Barium Hydroxide is used in specialty rubber applications for the production of barium-based accelerators and as a co-agent in chloroprene rubber systems.
Magnesium Carbonate
CAS: 546-93-0 | HS: 28369900
MgCO₃ | 84.31 g/mol
Magnesium Carbonate serves as a mild activator and processing aid in neoprene (polychloroprene) rubber — improving cure rate, reducing tack, and acting as a reinforcing filler in specialty rubber formulations for seals and gaskets.