Skip to main content
RS Pigments
Industrial Application Sector

Rubber & Elastomers

Vulcanization-Stable & Non-Bleeding Elastomeric Coloration

RS Pigments for Rubber & Elastomers

Engineered synthetic Ultramarine Blue and Violet pigments withstand high vulcanization temperatures and harsh sulfur or peroxide curing conditions without discoloration, bleeding, or catalytic polymer degradation.

Request Application Sample Request Commercial Quote
Ultra-low Copper (< 50 ppm) & Manganese (< 10 ppm)
Non-Staining / Zero Contact Migration (ASTM D 925)
REACH (EC 1907/2006) Compliant
RoHS Compliant & Heavy-Metal Free
ISO 9001:2015 Quality Tested
Formulation Advantages

Manufacturing Challenges & How RS Pigments Solves Them

Technical bottlenecks in rubber & elastomers often result from pigment agglomeration, heat degradation, or resin interaction. Our refined inorganic formulations eliminate these issues.

0 1

Discoloration During High-Temperature Vulcanization

Industry Bottleneck: Organic colorants and unstable pigments decompose or darken when subjected to high-pressure vulcanization presses operating at 150°C–180°C in the presence of sulfur accelerators.
RS Pigments Solution: RS synthetic ultramarines feature an exceptionally stable aluminosilicate cage that remains inert during sulfur and peroxide cure systems, preserving pure reddish-blue or violet shades.
0 2

Plasticizer Bleed & Blooming in White Soles and Weatherstripping

Industry Bottleneck: Soluble organic dyes migrate through oil-extended elastomers and bloom to the surface, contaminating adjacent profiles and causing severe contact staining.
RS Pigments Solution: Our pigments are 100% insoluble in plasticizers, aromatic process oils, and hydrocarbons, ensuring zero migration and clean boundary lines in multi-colored rubber goods.
0 3

Catalytic Aging from Trace Heavy Metals

Industry Bottleneck: Trace levels of copper and manganese act as potent pro-oxidants, accelerating rubber embrittlement, ozone cracking, and flex fatigue failure.
RS Pigments Solution: RS Pigments rubber grades are certified ultra-low in pro-oxidant metals (Copper < 50 ppm, Manganese < 10 ppm), preventing premature oxidative polymer breakdown.

Recommended Pigment Grades for Rubber & Elastomers

Tailored micronized formulations providing optimal color yield, dispersion ease, and thermal resistance.

Grade Name Target Polymer / Medium Heat Ceiling Performance Benefit Product Page
RS-ULTRA-RUBBER Heavy Duty NR, SBR, EPDM Footwear & Conveyor Belts Up to 300°C Exceptional sulfur cure stability, zero contact staining, high brightness. Specifications
RS-VIOLET-RUBBER Silicone Keypads, Medical Tubing, Sporting Goods Up to 280°C Pure violet hue, non-blooming in plasticized compounds, high lightfastness. Specifications
NANOX-AUTO Elastomer Automotive Weatherstripping & Under-Hood Hoses Up to 350°C Ultra-low free sulfur, non-corrosive to tooling, low volatile emissions. Specifications
Processing Guidelines

Dispersion, Dosing & Medium Compatibility

Recommended Dosing: 0.5% – 2.0% for translucent or tinted rubber; 2.0% – 6.0% for opaque solid goods
Processing Temperature Range: 140°C – 200°C (standard rubber curing cycles)
Dispersion & Milling Recommendation: Incorporate during the early mastication phase on an open two-roll mill or internal Banbury mixer alongside zinc oxide and stearic acid to ensure complete micro-dispersion.

Compatible Polymers & Substrates

Natural Rubber (NR) Styrene-Butadiene Rubber (SBR) Ethylene Propylene Diene Monomer (EPDM) Nitrile Butadiene Rubber (NBR) Silicone & Fluorosilicone Elastomers Chloroprene (Neoprene)
Custom compounding formulations and spectrophotometric shade matching available upon request.

Request a Formulation Trial Sample for Rubber & Elastomers

We supply complimentary 1kg and 5kg laboratory trial packs with lot-specific Certificates of Analysis (CoA) for qualified compounders.

Request Laboratory Sample Contact Applications Engineer