DIMONDS® B1844 Blend Polyols for PU Block Foam
Product Description
DIMONDS® B1844 is formulated polyols developed for open-mould block foam production. It is designed using HFC-245fa as blowing agent which contains polyether polyol, silicone surfactant, catalysts and water, blowing agent etc. The smoke and toxicity test of the foam has been conducted in accordance with 2010 FTP Code Annex 1, Part 2 and its fire resistance has passed DIN 4102 Class B1 as well. The foam can be applied for chemical industry, petrochemicalfields, LNG, LPG etc.
Typical Properties
| Item | Unit | DIMONDS® B1844 | DIMONDS® ISO1800 |
| Appearance | By visual | Transparent liquid | Brown liquid |
| Viscosity, 25℃ | mpa.s | 400-800 | 150-250 |
| Gravity,20℃ | g/ml | 1.20±0.05 | 1.24±0.01 |
| Shelf life | month | 6 | 12 |
Reaction properties (hand test)
| Item | Unit | Specification |
| Cream time | sec | 30-60 |
| Gel time | sec | 180-340 |
| Free rise density | kg/m3 | ≥40 |
Recommended processing information
| Item | Unit | Specification |
| Component temperature | ℃ | 20±3 |
| Mold temperature | ℃ | 45±5 |
| Dynamic pressure | kPa | 130±10 |
It is recommended to utilize high pressure foaming machinery. The chemicals should be adjusted to the correct temperature between 17-23℃ to ensure reactivity and viscosity suitable for processing.
The mixing pressure has to be set for both components at 120-150 bar.
The mould temperature recommended is 40-45℃ to guarantee good foam performances..
Foam properties
| Item | Unit | Specification | Test standard |
| Core density | kg/m3 | ≥40 | ASTM D1622-08 |
| Thermal conductivity, 10℃ | W/(m.k) | ≤0.023 | ASTM C518-10 |
| Compressive strength | kPa | ≥200 | ASTM D1621-10 |
| Tensile strength | kPa | ≥260 | ISO 1926 |
| Closed cell content | % | ≥95 | ASTM D6226 |
| Water absorb | % | ≤2.0 | ASTM C209-12 |
| Flammability | / | B1 | DIN 4102 |
| Range of temperature | ℃ | -196~140 |
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® B1844 should be protected from moisture by keeping containers sealed when not in use. Drums/IBC 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 10-25℃.
