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Silicone Paste for Coloring Liquid Silicone

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Advanced Coloring Technology for Silicone Applications

Our specially formulated silicone coloring paste represents a breakthrough in elastomer pigmentation technology, designed to deliver vibrant, consistent coloration across all silicone platforms without compromising material properties. This advanced color concentrate utilizes a unique carrier system compatible with both addition-cure and condensation-cure silicone chemistries, providing manufacturers with unprecedented coloring versatility and performance reliability.


Superior Technical Performance

  • Universal Compatibility: Engineered for LSR (Liquid Silicone Rubber), RTV-2, HTV solid silicone, and finished silicone products with guaranteed non-interference with cure kinetics

  • Exceptional Color Strength: 0.1-0.8% loading achieves full opacity, representing 40-60% higher pigmentation efficiency than standard silicone dyes

  • Thermal Stability: Withstands processing temperatures up to 300°C without color shift or thermal degradation

  • Non-Migration Guarantee: Zero bleeding or migration even in direct food contact and medical applications

  • Precision Dispersion: Sub-micron pigment particle size (<1μm) ensures speck-free coloration and maintains silicone transparency


Application-Specific Advantages

  • LSR Injection Molding: Uniform color distribution without affecting flow characteristics or cycle times

  • RTV-2 Casting Applications: No inhibition of platinum or tin catalyst systems with consistent batch-to-batch color matching

  • HTV Compression Molding: Excellent dispersion in high-consistency rubber without affecting mechanical properties

  • Finished Product Coloring: Surface application compatibility for post-production coloring of silicone goods

  • Medical & Food Grade: FDA 21 CFR 177.2600 compliant formulations with full regulatory documentation


Processing Benefits & Economic Advantages

  • Easy Incorporation: Homogeneous mixing within 3-5 minutes under standard production conditions

  • No Property Compromise: Maintains original silicone mechanical properties including tear strength, elongation, and hardness

  • Reduced Waste: Precise color matching eliminates trial batches and material waste

  • Cost Efficiency: 30-50% lower total coloring cost compared to pre-colored silicone compounds


Quality & Consistency Assurance

  • Color Accuracy: ΔE <0.5 between batches with spectrophotometric quality control

  • Regulatory Compliance: ROHS 3.0, REACH SVHC, UL, and ISO 10993 certifications available

  • Batch Traceability: Complete documentation from raw pigment to finished paste

  • Technical Support: Color matching services and application technical guidance


Industry Applications

  • Medical Devices: Surgical instruments, wearable devices, and healthcare equipment requiring biocompatible coloring

  • Consumer Products: Kitchenware, baby products, and household items demanding food-safe coloration

  • Automotive Components: Seals, gaskets, and interior components with color coding requirements

  • Electronics: Keypads, seals, and insulating components needing precise color identification

  • Industrial Products: Custom-colored seals, profiles, and industrial components


Technical Specifications

ParameterPerformance ValueTest Method
Pigment Concentration40-60% by weightGravimetric Analysis
Viscosity15,000-25,000 mPa·sBrookfield RVF
Specific Gravity1.05-1.25 g/cm³ASTM D792
Dispersion QualityHegman ≥7ASTM D1210

Customization & Support Services

  • Color Matching: Pantone, RAL, or custom color development within 5 working days

  • Special Effects: Pearlescent, fluorescent, metallic, or thermochromic options available

  • Sample Program: 100g trial samples with technical data sheet and processing guidelines

  • Global Logistics: Flexible packaging from 1kg jars to 25kg pails with worldwide shipping



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Dongguan Gangtian Polymer Materials Co., Ltd. locates in Dongguan City, Guangdong Province, China, is a professional leading manufacturer of RTV 2 Liquid Silicone Rubbers.

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