DM1250 — cold mold system, 50 Shore A
Two-component polyurethane system for mold making: A — polyol (DM1250-A), **B — MDI-based prepolymer (DM1260-B)**. Cures at room temperature. Soft, flexible result (Shore A 50). Category Cold System.
Components
| Parameter | A (DM1250-A) | B (DM1260-B) |
|---|---|---|
| Appearance | light-yellow transparent liquid | colorless/light-yellow transparent liquid |
| Viscosity (mPa·s / 25℃) | 1300 ± 200 | 1050 ± 150 |
Processing
| Parameter | Value |
|---|---|
| A:B ratio | 1 : 1 |
| Working temperature | 25-40 ℃ |
| Mold temperature | 30 ℃ |
| Gel time | 15-16 min / 30℃ |
| Demolding | 30-60 min (thin <3 mm — longer) |
Final product properties
| Parameter | Value |
|---|---|
| Appearance | light-yellow elastomer (transparent) |
| Hardness, Shore A | 50 ± 3 |
| Tensile strength | 7 MPa |
| Elongation at break | 500-700 % |
| Tear (without notch) | 25 kN/m |
| Rebound | 53 % |
| Density (25℃) | 1.05 g/cm³ |
Excellent technical characteristics; room-temperature curing; fast demolding; color adjustable with pigment; water resistance; elasticity.
Applications
Polyurethane molds: for footwear, concrete, etc. Silicone rubber replacement for manufacturing artificial stone.
Packaging · storage
20 kg / 200 kg steel drums · 12 months · cool/dry, under nitrogen.
FAQ
Q: What is the hardness of DM1250? A: 50 Shore A — a soft, flexible mold. Q: Is an oven required? A: No, it cures at 25-40 ℃. Q: Can it replace silicone? A: Yes, it is suitable as a silicone rubber replacement for artificial stone. Q: Difference from DM1280? A: DM1250 is softer (50A) and has a longer gel time (15-16 min); DM1280 (80 Shore A) is harder (80A, 6-8 min).
category: Cold System · terms: Reference