Due to patent constraints, Solvay does not market Solkane®365mfc and of blends containing Solkane®365mfc in the USA and Canada for use as a blowing agent to foam a plastic based on an isocyanate. See the full warning.
Available Publication
Solkane® 365/227 
Physical properties
| Chemical name |
|
Blend of
1,1,1,3,3-Pentafluorobutane
and
1,1,1,2,3,3,3-Heptafluoropropane |
| Formula |
|
CF3-CH2-CF2-CH3
and
CF3-CHF-CF3 |
| Ratio Solkane 365/227 |
mass-% |
93/7 |
87/13 |
| Molecular weight average |
g/mol |
149.6 |
150.9 |
| Bubble point |
°C at 1.013 bar |
30 |
24 |
| Flammable |
|
no |
no |
| Vapure pressure at 20 °C |
kPa |
70 |
93 |
| Density of liquid at 20 °C |
kg/dm³ |
1.28 |
1.29 |
| Density of vapour at 20 °C |
Air = 1 |
6.4 |
6.5 |
Thermal conductivity of vapour
at 25 °C |
mW/m.K |
10.7 |
10.9 |
| Viscosity of liquid at 20 °C |
µPa.s |
447 |
432 |
| Log P o/w (pure Solkane 365mfc) |
|
1.6 |
| Solubility in water at 23 °C |
g/kg |
0.84 |
Vapour Pressure
Liquid Density
Viscosity
Miscibility
Solkane 365/227 has a good miscibility with other solvents (e.g. Acetone, Ethanol, Pentane, etc.). It often forms azeotropes.
Materials Compatibility
| Thermoplastics |
Percent change of weight |
| PVC |
- 0.02 |
| PE-HD |
0.4 |
| PMMA |
57 |
| Polycarbonate |
0.3 |
| PP |
0.2 |
| Nylon 66 |
- 0.3 |
| PS |
0.2 |
|
Elastomers
|
| Neoprene |
1.0 |
| Viton A |
90.5 |
| EPDM |
1.6 |
| Natural rubber |
7.2 |
| Nitril rubber |
2.5 |
| Silicone |
16.1 |
| Change in % by weight after 7 days immersion. |
Stability
Solkane 365/227 has a thermal and chemical stability even higher than Solkane 141b. It should not be exposed to strong alkaline compounds or alkali metals. Under high temperatures or/and pressure hazardous reactions are possible with reactive metals e.g. Zinc, Aluminium and its alloys, Magnesium as well as with air. The user should give attention to our SDS for additional information.
In pre-formulated PU-foam systems Solkane 365/227 blend has been observed to be stable, and no stabiliser is needed.
Quality
| Purity of Solkane 365mfc and Solkane 227ea |
99.5 % min.
|
| Water |
100 ppm max.
|
| Acid |
1 ppm max.
|
| Non volatile residue |
100 ppm max.
|
Flammability
Solkane 365/227 blends have no flash point (ISO 1516/1523) and are not subject to flammable liquid regulation.
Being non azeotropic blends, the composition can change during handling. Below a concentration of 5 mass% of Solkane 227ea the liquid becomes flammable.
Straight Solkane 365mfc has a flash point below - 27 °C (DIN 51755, Teil 2) but is difficult to ignite. The minimum ignition energy is around 50 times higher than of n-pentane and is 10.4 mJ (25 °C, 8 Vol.% in air at 1 bar).
The explosion limits at standard conditions in dry air are:
| Lower explosion limit (LEL) |
3.6 % by volume in air
|
| Upper explosion limit (UEL) |
13.3 % by volume in air
|
For more information please read our brochure about flammability characteristics and handling.
Solubility in Polyols
The polyol solubility * is lower than known from Solkane 141b and is higher than hydrocarbons in most cases.
| Polyol |
Solkane 141b |
Solkane 365mfc |
n-pentane |
c-pentane |
| Caradol 585 |
100
|
32
|
5
|
11
|
| Castor Oil |
100
|
18
|
47
|
100
|
| Ethyleneglycol |
4
|
3
|
1
|
1
|
| IXOL M125 |
37
|
5
|
2
|
5
|
| Stepanpol 3152 |
33
|
30
|
6
|
7
|
| TCPP |
100
|
100
|
10
|
100
|
| Tercarol A 350 |
100
|
100
|
36
|
100
|
| Tercarol RF 55 |
100
|
100
|
4
|
18
|
| Voranol RA 640 |
100
|
100
|
20
|
100
|
* Solubility in g per 100 g Polyol
|
