Guides

Short, practical articles for compounders and buyers.

Which accelerator for which rubber?Choosing primary and secondary accelerators by rubber type: a practical table for NR, SBR, BR, EPDM, NBR, IIR, CR and latex.

Choosing nitrosamine-safe acceleratorsWhich accelerators form nitrosamines, why it is a problem, and which substitutes are used: TMTD → TBzTD, ZDEC → ZBEC, NOBS → TBBS, DTDM → CLD.

Antiozonant or antioxidant?Why rubber ages, why 6PPD and TMQ are used together, non-staining options, and the 6PPD-quinone debate.

Insoluble sulfur: why, how, how much?How insoluble sulfur prevents blooming, IS-60/IS-90 and OT20 types, mixing temperature, storage and sulfur equivalent calculation.

Conventional, semi-EV and EV sulfur systemsHow the sulfur/accelerator ratio changes the crosslink structure; fatigue or heat resistance: system selection and typical ratios.

Process chemicals: auxiliaries outside the formulationAnti-tack agent, inside and outside tire paint, mold release agent and marking ink are not in the compound formulation as phr; they are applied to surfaces during production. Which group is used where, and what drives the selection?

Choosing an anti-tack agent: powder or liquid?Why compound sticks together on the batch-off line, the difference between mineral powder and soap-based liquid, and how film thickness affects the next process.

Inside tire paint: why bladders stick, what mica doesWhat inside paint applied to the inner surface of the green tire does during curing; the difference between mica-filled and unfilled types; dilution and dosage errors.

Outside paint and mold release: where blemishes come fromWhat outside paint applied to the outer surface of the green tire does at mold entry and release after curing; how excess application fouls the mold and how to prevent sidewall blemishes.