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High-resolution photopolymer formulation optimized for stereolithography (SLA) 3D printing.
Excellent dimensional stability and low post-cure shrinkage for precision functional prototypes.
Superior surface finish and fine feature reproduction, supporting intricate geometries down to <100 µm details.
Good mechanical strength and thermal resistance after UV curing and thermal post-cure.
Low viscosity for efficient recoating and consistent layer formation in industrial SLA systems.
Functional prototyping in automotive and aerospace engineering.
Manufacturing of high-fidelity concept models and design validation parts.
Tooling patterns and master patterns for silicone molding and investment casting.
End-use components requiring stiffness, heat resistance, and fine surface quality.
Medical device prototypes requiring biocompatibility-compliant material behavior (ISO 10993 tested per request).
| Chemical Type | Epoxy-based photopolymer |
| Product Form | Liquid resin (ready-to-use) |
| Appearance | Amber-transparent liquid |
| Primary Applications | Stereolithography (SLA) additive manufacturing |
| Key Features | High resolution, low shrinkage, excellent green strength |
| Benefits | Precision part accuracy, smooth surface finish, reliable build performance |
| Curing Mechanism | UV light-initiated free-radical polymerization |
| Storage Conditions | 20–25 °C, protected from moisture and UV light |
Q1: What is the primary application of DSM Somos 9420 Epoxy Resin?
A: DSM Somos 9420 is a high-performance photopolymer epoxy resin formulated specifically for industrial stereolithography (SLA) 3D printing, delivering excellent dimensional stability, surface finish, and mechanical strength in functional prototypes and end-use parts.
Q2: Is Somos 9420 compatible with standard SLA systems?
A: Yes — Somos 9420 is optimized for use on major industrial SLA platforms, including 3D Systems’ ProX and Figure 4 series. Users should consult their equipment manufacturer’s guidelines and perform validation tests to confirm optimal laser parameters and build settings.
Q3: How does Somos 9420 compare to standard acrylate-based resins in terms of thermal performance?
A: As an epoxy-based formulation, Somos 9420 offers significantly higher heat deflection temperature and improved long-term thermal stability compared to conventional acrylate resins, making it suitable for applications requiring elevated service temperatures and reduced post-cure shrinkage.
Q4: What post-processing steps are recommended after printing with Somos 9420?
A: Parts require thorough solvent cleaning (e.g., isopropyl alcohol or proprietary resin cleaners), followed by a controlled UV and thermal post-cure to achieve full crosslinking and optimal mechanical properties. Specific time/temperature profiles depend on part geometry and intended performance requirements.
Q5: Can Somos 9420 be blended or modified with other resins or additives?
A: While Somos 9420 is supplied as a ready-to-use formulation, limited compatibility testing may be conducted under controlled R&D conditions. However, unqualified modifications can adversely affect printability, cure kinetics, and final part performance — DSM recommends using the resin as supplied unless otherwise validated.
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E-mail: wangxingqiang@ericwchem.com
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