Poly-Optic® 1420 Clear Casting Resin is a two-part, liquid polyurethane resin that cures (RTV) to a water-clear, Shore D85 plastic. It cures to a tough, impact and heat-resistant plastic that can be polished and machined and is used extensively in prototyping applications. Heat cure (150°F - 180°F) is required to achieve optimum physical properties. When cured at room temperature, the result is a brittle, glass-like casting.
Vacuum and/or pressure casting techniques are recommended for this product. Cure inhibition can occur when casting this resin in tin-cured silicone rubber molds – use a platinum-cured silicone rubber mold if working with silicones.
WARNING: This product contains Phenylmercuric acetate (CAS 62-38-4), a chemical known to the State of California to cause reproductive harm. For more information, go to .
FOR INDUSTRIAL/PROFESSIONAL USE ONLY.
Technical Specifications Mix Ratio by Weight:2A:1B Shore Hardness:D85 Pot Life:15 min. Demold Time:8 hr. @ 150°F / 30 min. @ 175°F Cured Color:Water-Clear Mixed Viscosity:250 cP Specific Volume:26.3 in³/lb Specific Gravity:1.05 Elongation:5.3 % Tensile Strength:7,900 psi Elastic Modulus:171,500 psi Flexural Modulus:250,000 psi Flexural Strength, 5% Strain:12,600 psi Heat Deflection Temp.:168°F Max Exotherm:311°F Notes:Demold time varies with thickness of casting and the amount of Poly-Optic Part X Accelerator added. The thinner the casting, the longer the demold time. Shrinkage in polyurethane resins is caused by gelling while hot then cooling. Kit Components| Poly-Optic® 1420 | Components |
|---|---|
| 6-lb kit includes: | 4 lb of Poly-Optic® 1420 Part A (~2 quarts) 2 lb of Poly-Optic® 1420 Part B (~1 quart) |
| 24-lb kit includes: | 16 lb of Poly-Optic® 1420 Part A (~2 gallons) 8 lb of Poly-Optic® 1420 Part B (~1 gallon) |
| 120-lb kit includes: | 80 lb of Poly-Optic® 1420 Part A (~10 gallons) 40 lb of Poly-Optic® 1420 Part B (~5 gallons) |