Expandable polystyrene is a small, solid, milky-white bead. Each granule consists of polystyrene and pentane or isopentane gas. Most are available in a non-combustible form – self-extinguishing. Application Primarily used for the production of expanded polystyrene or polystyrene foam. The granules (beads) expand many times and stick together to form a tight foam block by the action of steam. Styrofoam is very light and has excellent thermal insulation and water resistance. The most widely used are self-snuffing EPS grades. Mainly for the production of foam products used in the construction industry, such as: – Styrofoam blocks and boards for insulation and soundproofing; – packaging of various household products; – decorative interior products: skirting boards, tiles, trim sockets; – fixed formwork and shell for pipe insulation. There are two technologies for the production of expandable polystyrene: – mass polymerisation; – suspension polymerisation.
Styrene, Oligomers
C9H12
–
Solid
| INDICATOR NAME | CHARACTERISTICS |
|---|
| Variety grades | А (concentrated), A, B, V |
| Mass fraction of components, %: |
| – sum of C2 hydrocarbons, max. | not standardised, 2.0, 4.0, 6.0 |
| – propane | not standardised, not standardised, not standardised, not stan. |
| – propylene, not less | 94.0, 65.0, 42.0, 25.0 |
| – sum of C4 hydrocarbons, max. | not stan., 5.0, 6.0, 8.0 |
| – sum of C5 hydrocarbons, and above, not more | not stan., none, none, 1.0 |
| Mass fraction of hydrogen sulphide, % max. | 0.002, 0.002, 0.002, 0.02 |
| Free water and alkali content | none, none, none, none |
