The SGPU 376 resin is an aluminum-filled polyurethane resin that can withstand high temperatures. The SGPU 376 is a fast curing casting resin and has a small shrinkage despite the fast curing. Due to the high temperature resistance and the possibility of high gloss polishing, this filled polyurethane resin is often used in making vacuum forming tools (molds).
The two component polyurethane system is suitable for making small to medium small models. The SGPU 376S (slow) is a slow variant for processing larger models. The SGPU 376 are packed per Set 1.15 kg or a carton of 11.5 kg (10 x 1.15 kg).
De SGPU 376 heeft een mengverhouding van 100A : 15 B.
Packaging: Set 1.15
Mixing ratio: 100 A: 15 B
Hardness (Shore D): 82
Processing time (min.): 4-5 min.
Demoulding time: 0.5 hours
Density: 1.65 g / ml (mix)
Viscosity (cP): 1500 mPa.s
Viscosity (cP) A: 6000-7500 mPa.s
Viscosity (cP) B: 100 mPa.s
Linear shrinkage: 0.19% * (500 x50 x 10 mm)
Glass Transition Tg (DSC): 116 oC
Product type: Polyurethane resin / urethane casting resin SGPU 376
* Shrinkage may increase to 0.59% after prolonged high temperature vacuum forming.
First thoroughly mix the resin component (A) to homogenize the light sediment and to provide the filling with the resin. Mix gently, avoid air entrapment when mixing component A. Add the hardener (part B) to the filled resin (A) and mix both components thoroughly until well mixed. The mold must be clean, dry and treated with a release agent Pol-Ease 2300 before casting. Polish if necessary to achieve the desired surface finish. When using a silicone mold, a release agent is not necessary. Always test first whether the pu adheres to the mold you are using.
Slowly pour the mix into the mold in one place and allow the material to drain itself. Make sure the grouting takes place within the stated material processing time. For larger castings it may be necessary to cast successive layers. Pour the next layer when the previous layer is still tacky and not fully cured, as better adhesion is achieved without witness lines visible. You can also use SGPU 376 S (Slow) for the larger castings.
Let it cure for at least 30 minutes at room temperature before removing the cast model from the mold. Demoulding times will vary with the thickness of the casting, for example thin parts can take 45-60 minutes before they can be demoulded. If you have time, leave the model in the mold for as long as possible.
Like many unfilled and filled PU resins, the SGPU can be machined. Also pre-drilling of air channels and holes for vacuum molds.