Metadiene (PD) is a very abundant conjugated diolefin in the C5 fraction of petroleum cracking. Because its boiling point is very close to other components in the C5 fraction, PD has been used as a raw material for the synthesis of petroleum resins or as a direct chemical fuel. Insoluble in water, soluble in ethanol, ether, acetone, benzene. It can irritate human eyes, skin, mucous membranes and respiratory tract. Mainly used in the manufacture of polyisoprene resin, but also used in organic synthesis.
The main industrial use is the production of petroleum resins. M-pentadiene petroleum resin is one of the main uses of m-pentadiene, which belongs to C5 aliphatic petroleum resin. M-pentadiene petroleum resin is a kind of m-pentadiene raw material obtained by separation and purification of C5 fraction and cationic polymerization. The main link of this kind of petroleum resin is fatty Chemicalbook hydrocarbon structure, which has low acid value, good miscibility, good adhesion, water resistance, ethanol resistance and chemical resistance. With the continuous development of m-pentadiene petroleum resin technology, it is widely used in pressure sensitive adhesive, light color hot melt adhesive, light color hot melt type mark paint, hot melt coating, rubber viscosifier, paint and printing ink additive fields.
Loaʻa iā mākou nā hale hana kiʻekiʻe me ka pilina hohonu, hiki iā ia ke hāʻawi iā ʻoe i nā huahana kiʻekiʻe a me nā kumukūʻai hoʻokūkū. A hiki iā mākou ke hāʻawi i nā uku no nā kūʻai nui. A ke hui pū nei mākou me nā ʻoihana lawe ukana ʻoihana he nui, hiki ke hāʻawi i nā huahana me ka palekana a me ka maʻalahi i kou mau lima. ʻO ka manawa hoʻouna ma kahi o 3-20 mau lā ma hope o ka hōʻoia ʻana o ka uku.
Molecular Formula | C5H8 |
Molar Mass | 68.12 |
Density | 0.683g/mLat 25°C(lit.) |
Lae hehee | −87°C(lit.) |
Boling Point | 42°C(lit.) |
Flash Point | <−30°F |
Vapor Presure | 6.56 psi ( 20 °C) |
Vapor Density | 2.4 (vs air) |
Storage Condition | Refrigerator |
Paʻa | Stable. Incompatible with strong oxidizing agents. Very flammable - note low flash point and low boiling point. |
Refractive Index | n20/D 1.433(lit.) |
Physical and Chemical Properties | Character: colorless flammable liquid. solubility: insoluble in water, soluble in ethanol and ether |
Hoʻohana | Mainly used in the manufacture of polypiperylene resin, also used in organic synthesis |
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