Rubber & Elastomers
Ultramarine Blue Pigments for Vulcanized Rubber Manufacturing
Published:
2026-03-28
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Reading time:
5 min read
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By RS Pigments Applications Engineering
Withstanding sulfur vulcanization heat without color shift or cross-ply bleed in automotive profiles, footwear outsoles, and conveyor belts.
Rubber compounds undergo severe thermal and chemical stresses during sulfur vulcanization. Ultramarine Blue is chemically stable in the presence of vulcanizing agents, accelerators, and elevated mold temperatures.
It imparts bright reddish-blue color to footwear soles and industrial hoses without migrating between laminated plies or causing sulfur blooming.
Key Technical Takeaways
- Ultramarine Blue is chemically non-nucleating, eliminating shrinkage and warping in HDPE and PP injection moldings.
- Thermal stability up to 350°C in specialized heat-resistant grades and NANOX compounding platforms.
- Total resistance to alkaline environments (5/5 rating), ideal for masonry coatings, concrete, and laundry powders.
Need Technical Testing Samples for Your Lab?
RS Pigments supplies 1kg and 5kg trial sample packs with certified CoA, complete particle size distribution, and FPV analysis.