DIMONDS® PP1834/SL HFC-blown Blend Polyols for PU Foam Pipe Shell
Description
DIMONDS® PP1834/SL is a two-components closed-cell polyurethane foam system. This product is premixed with HFC-245fa as foaming agent. It can be applied to pipe shell thermal insulation.
Physical Properties
|
Items |
Units |
DIMONDS® PP1834/SL |
DIMONDS® ISO1800 |
|
Appearance |
|
Light yellow transparent liquid |
Brown liquid |
|
Viscosity,25℃ |
mPa.s |
500-800 |
150-250 |
|
Specific gravity,20℃ |
g/ml |
1.15±0.05 |
1.24±0.01 |
Reaction Performance（by hands)
| Items | Units | Specifications |
| Cream time | sec | 10-20 |
| Gel time | sec | 40-80 |
| Track free time | sec | 60-120 |
| Free rise density | Kg/m3 | 30-40 |
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 Performances
| Items | Units | Specifications | Test Standard |
| Density | Kg/m3 | ≥45 | ASTM D1622 |
| Compressive strength | kPa | ≥200 | ASTM D1621 |
| Tensile strength | kPa | ≥300 | ISO 1926:2009 |
| Thermal conductivity,20℃ | W/(m.k) | ≤0.024 | ASTM C518 |
| Closed cell content | % | ≥90 | ASTM D2856 |
| 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® PP1834/SL 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.
The optimum storage temperature should be 10-25℃.
