Blowing Agent (n-Pentane/Isopentane 70-30%)
Pentane Foaming Agent, Pentane Blowing Agent
Main Uses
It is mainly used as high-efficiency foaming agent/blowing agent for expandable polystyrene.
Product Specifications
Pentane foaming agent/blowing agent is mainly composed of n-Pentane and Isopentane, and 9 products are composed according to different components. The specifications are F1, F2, F3, F4, F5, F6, F7, F8 and F9, as shown in the table below.
Composition and Specifications of Pentane Blowing Agent
| Components |
Specifications |
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| F1 | F2 | F3 | F4 | F5 | F6 | F7 | F8 | F9 | |
| nC5
(n-Pentane)/% |
10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |
| iC5
(Isopentane)/% |
90 | 80 | 70 | 60 | 50 | 40 | 30 | 20 | 10 |
| Note: according to the requirement, the adjustment range of NC5 and IC5 content shall be: ± 2% | |||||||||
Packaging: ISO Tank or Flexi Tank.
Description
n-/Isopentane 70-30% Technical Datasheet
Blowing Agent Additive
n-(70%) / Iso Pentane (30%) Summary:
Pentane 70/30 is a blend of 70% n-Pentane and 30% Isopentane. It is a very fast evaporating hydrocarbon solvent and low in impurities such as sulphur, olefins, benzene and total aromatics. Typically this product finds use in applications where high volatility is required. Blowing agent, aerosol propellant and electronic cleaning are examples of such applications.
| Item | Quality Index | Analysis Method |
| Density（20℃）/(kg/m³) | 615～630 | GB/T 1884 GB/T 1885 |
| C4 and below light components/% | ≤1 | |
| Total Pentane/% | ≥98 | |
| C6 and above recombinant fractions/% | ≤1 | SH/T 0714 |
Note: the final specification shall be subject to the factory test result and Certificate of Analysis (COA).
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Material Status
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Literature 1
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Nominal Value
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Density 2
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0.627 to 0.632
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| State at Room Temperature |
Solid
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| Chemical Description | • 30% Isopentane
• 70% n-Pentane |
| Notes |
| 1Through these links, you can access our literature. We try to keep them up to date; However, you can always contact our sales representative by email to find the latest literature: info@junyuanpetroleumgroup.com. |
| 2at 15°C |
In the work of replacing chlorofluorocarbons (CFCs), major countries in Western Europe have shown interest in alkanes, especially pentanes. Their main view is that pentanes have no halogen atoms, ODP value (ozone depletion potential value) is zero, and GWP value is also quite small, generally lower than 0.0004 At present, pentane compounds replacing CFC-11 (monofluorotrichloromethane) as chemical foaming agent are mainly n-Pentane, Isopentane and Cyclopentane.
Among pentane compounds, Cyclopentane is the most used. At present, the research on Cyclopentane foaming system is more systematic and in-depth in Western European developed countries. Cyclopentane blowing agents were first used in the European conveyor belt laminate production line, and Cyclopentane Blowing Agents were widely used in products such as metal sandwich panels and bulk foams. Polyurethane rigid foam was widely applied in the fields of household appliances and construction industry. The main advantages of using pentane as an alternative to CFC-11 are as follows.
1. These compounds do not contain halogen and have a short service life in the atmosphere. Their degradation half-life is 10 ~ 15h. They can be completely decomposed in a few days and will not consume or destroy ozone in the atmosphere. ODP value (ozone depletion potential value) is equal to zero.
2. The GWP value (global warming potential value) of pentane is very small, only 1 / 10000 ~ 4 / 10000 of CFC-11
3. The boiling point of pentane is similar to that of CFC-11, so the foaming process conditions will not change much.
4. The relative molecular weight of pentane is about 50% lower than that of CFC-11. When pentane is used as foaming agent, the dosage is relatively saved by nearly half.
5. The gas phase thermal conductivity of pentane is low. The use of pentane as blowing agent has little effect on the insulation performance of polyurethane rigid foam, and can meet the technical requirements of thermal insulation of household appliances such as refrigerators.
Frequently asked questions about using pentane blowing agent:
1. Pentane is flammable and has a wide range of explosion limits in the air. Therefore, in terms of equipment and production safety, greater investment is needed to transform the equipment and production environment and formulate more strict operating procedures.
2. Pentane has poor miscibility with common polyether polyols and other components, but its miscibility will become worse in the presence of water. Among the three pentane compounds, cyclopentane is slightly more miscible. According to the research, the solubility of cyclopentane to the main types of polyether with hydroxyl value greater than 44mgkoh / G is about 12% ~ 19%, and the solubility of n-pentane and isopentane is only 7%.
3. Pentane is easy to escape from the foam and pollute the environment. At the same time, its combustion and explosion characteristics will cause some danger to the production safety.
4. The gas phase thermal conductivity is high. It is estimated that the energy consumption of pentane foamed products will be about 10% higher than that of CFC-11.
The boiling point of Cyclopentane is slightly higher. When the temperature of the foam product decreases, the Cyclopentane gas will condensate and affect the dimensional stability of the foam. Therefore, the foam density of the system is generally higher than that of the CFC-11 system. In the use of thermal insulation materials made of cyclopentane blowing agent system, such as fridge insulation layer, in order to avoid temperature drop, pentane condensation in the bubble, and the difference between the atmospheric pressure is bigger and bigger, resulting in the deformation stress of the foam body. The strength of the rigid foam material used for the insulation layer must be raised. Generally, the CFC-11 system foam can withstand the shrinkage stress caused by pressure drop in the bubble when the density is 32kg/m3. For the rigid polyurethane foam with pentane foaming system, the density must be increased to 37/kgm3, so as to ensure the dimensional stability of the foam at low temperature. For this reason, the compressive strength of the cyclopentane foaming system is greater than 160kPa. According to experience, in the formulation of pentane foaming system, when the amount of water is 2 phr, the amount of pentane foaming agent should usually be less than 12 phr, and when the amount of water in the formulation is zero, the amount of pentane should usually be less than 25 phr.
Junyuan Petroleum Group produces a wide range of hydrocarbon solvents, including n-Pentane, Isopentane, Cyclopentane, aromatics and Pentane Blends.
Revision History
Last Updated: 11/20/2016
