SEP Epoxy Color Pastes: Technical Data and Applications

The SEP series represents DENSON's premium line of epoxy color pastes, engineered for demanding electronic, automotive, and industrial applications. This article provides comprehensive technical information for engineers and procurement specialists.

Product Overview SEP series epoxy color pastes are 100% solvent-free formulations designed for compatibility with epoxy resin systems. The series offers 13 carefully selected grades covering essential industrial colors, each optimized for specific performance requirements. ## Technical Specifications ### General Properties - **Carrier System**: Epoxy resin, 100% solvent-free - **Pigment Content**: 15-45% depending on grade - **Heat Resistance**: 260-300°C for most grades - **Light Fastness**: 7-8 on Blue Wool Scale - **Particle Size**: Nano-dispersion for uniform color ### Available Grades **White**: SEP-White — Titanium dioxide, high whiteness, excellent hiding power **Blacks**: - SEP-988: Automotive-grade jet black with Mercedes-certified pigment - SEP-Black: Standard carbon black formulation **Yellows**: - SEP-9202: Bright yellow with Clariant organic pigment - SEP-9205: Golden yellow for warm tone applications **Reds**: - SEP-9208: Brilliant red with high chroma - SEP-9210: Iron oxide red for inorganic requirement **Blues & Greens**: - SEP-9301: Phthalocyanine blue, excellent weather resistance - SEP-9305: Phthalocyanine green, chemical resistant **Specialty Colors**: - SEP-9401: Permanent violet with dioxazine pigment - SEP-9501: Iron oxide brown for earth tone applications ## Key Features ### 1. Electronic-Grade Stability SEP series is specifically formulated for electronic potting and encapsulation applications where: - Ionic impurity must be minimized - Electrical insulation properties are critical - Long-term stability under thermal cycling is required ### 2. Automotive Certification SEP-988 jet black uses automotive-grade pigment certified by Mercedes-Benz for use in automotive electronic components. This grade meets: - AEC-Q200 qualification requirements - Long-term thermal aging resistance - Vibration and mechanical shock stability ### 3. Excellent Dispersion Nano-particle technology ensures: - No agglomeration in epoxy resin - Uniform color distribution at low dosage - No filtration issues in automated dispensing systems ## Application Guidelines ### Recommended Dosage - **Light Colors**: 1-3% by weight - **Medium Colors**: 2-4% by weight - **Deep Colors**: 3-5% by weight Always conduct trial batches to determine optimal dosage for your specific formulation. ### Processing Instructions 1. **Pre-mixing**: Stir color paste thoroughly before use 2. **Addition**: Add to Part A (resin component) before mixing with Part B (hardener) 3. **Mixing**: Use high-speed mixer at 500-1000 RPM for 3-5 minutes 4. **Degassing**: Vacuum degas after colorant addition to remove entrapped air 5. **Curing**: Follow standard epoxy curing schedule; color paste does not affect cure kinetics ### Compatibility SEP series is compatible with: - Bisphenol A epoxy resins - Bisphenol F epoxy resins - Novolac epoxy systems - Cycloaliphatic epoxy formulations ## Quality Assurance Every batch of SEP series undergoes: - Color measurement with spectrophotometer - Viscosity verification - Particle size distribution analysis - Heat aging test at rated temperature - Light fastness validation ## Ordering Information SEP series is available in: - 1kg sample containers - 5kg production containers - 25kg bulk packaging Custom packaging available for volume orders. Contact our sales team for pricing and availability.