DM1280 — cold mold system, 80 Shore A
Two-component polyurethane system for mold making: A — polyol (DM1280-A), **B — MDI-based prepolymer (DM1295-B)**. Cures at room temperature. Harder result (Shore A 80) with a short gel time. Category Cold System.
Components
| Parameter | A (DM1280-A) | B (DM1295-B) |
|---|---|---|
| Appearance | light-yellow transparent liquid | colorless/light-yellow transparent liquid |
| Viscosity (mPa·s / 25℃) | 1700 ± 200 | 670 ± 150 |
Processing
| Parameter | Value |
|---|---|
| A:B ratio | 1 : 1 |
| Working temperature | 25-40 ℃ |
| Mold temperature | 30 ℃ |
| Gel time | 6-8 min / 30℃ |
| Demolding | 30-60 min (thin <3 mm — longer) |
Final product properties
| Parameter | Value |
|---|---|
| Appearance | light-yellow elastomer (transparent) |
| Hardness, Shore A | 80 ± 2 |
| Tensile strength | 10 MPa |
| Elongation at break | 500-700 % |
| Tear (without notch) | 40 kN/m |
| Rebound | 50 % |
| Density (25℃) | 1.10 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. Harder than DM1250 — for molds that must hold their geometry.
Packaging · storage
20 kg / 200 kg steel drums · 12 months · cool/dry, under nitrogen.
FAQ
Q: What is the hardness of DM1280? A: 80 Shore A — a harder mold. Q: Is an oven required? A: No, it cures at 25-40 ℃. Q: Fastest gel time? A: 6-8 min/30℃ — faster than DM1250 (50 Shore A) (15-16 min). Q: What is it for? A: Stiffer polyurethane molds (footwear, concrete, artificial stone), a silicone replacement.
category: Cold System · terms: Reference