DIMONDS® W1841/D80 Rigid Polyurethane Blend Polyols for Wood Imitation
Product Description
DIMONDS® W1841/D80 is a two-component closed-cell polyurethane foam system. It is 100% water based system premixed with polyols, silicone surfactant, catalysts and other additives. It can be applied to wood imitation.
Typical Properties
| Item | Unit | DIMONDS® W1841/D80 | DIMONDS® ISO1800 |
| Appearance | By visual | Light yellow transparent liquid | Brown liquid |
| Viscosity, 25℃ | mpa.s | 600-800 | 150-250 |
| Gravity,20℃ | g/ml | 1.12±0.05 | 1.24±0.01 |
Reaction properties (hand test)
| Item | Unit | Specification |
| DIMONDS® W1844/D80 | g | 100 |
| DIMONDS® ISO1800 | g | 110 |
| Cream time | sec | 25-35 |
| Gel time | sec | 100-120 |
| Free rise density | kg/m3 | 52-58 |
Recommended processing information
| Item | Unit | Specification |
| Component temperature | ℃ | 25±3 |
| Environment temperature | ℃ | ≥15 |
| Mold temperature | ℃ | 40±5 |
| Dynamic pressure | kPa | 140±10 |
It is recommended to utilize high pressure foaming machinery. The chemicals should be adjusted to the correct temperature between 22-27 ℃ to ensure reactivity and viscosity suitable for processing.
The mixing pressure has to be set for both components at 130-150 bar.
The mould temperature recommended is 35-45℃ to guarantee good foam performances.
Foam properties
| Item | Unit | Specification | Test standard |
| Mold Density | Kg/m3 | ≥80 | ASTM D1622 |
| Compressive Strength | MPa | ≥2 | ASTM D1621 |
| Surface Hardness | Shore D | ≥35 | / |
| Closed Cell Rate | % | ≥90 | ASTM D2856 |
| Water Absorption | % | ≤2 | ASTM C209-12 |
| Dimensional Stability, -20℃*24h
70℃*90%RH*24h |
% | ≤2 | ASTM D2126 |
The above testing data have been generated in lab or field conditions which are typical for this application. They are believed to be correct but data variations due to varying processing or ambient conditions can not be excluded. The customer remains responsible for making his own interpretation of data and suitability of the chemicals to his particular operation.
Handling and Storage
DIMONDS® W1841/D80 should be protected from moisture by keeping containers sealed when not in use. Drums have to be stored indoors to protect the material from water ingress, frost and direct heat from the sun. Under temperature conditions and in properly sealed containers, the storage life of the polyol is 6 months and 12 months for isocyanate.
The optimum storage temperature should be 10-30℃.
