Norfenchene
Norbornylene
CAS: 498-66-8
Molecular Formula: C7H10
Norfenchene - Names and Identifiers
| Name | Norbornylene |
| Synonyms | NSC Norbornene Norfenchene Norcamphene 2-Norbornene Norbornylene 2-Norbornylene Bicyclo[2.2.1]heptene bicyclo(2.2.1)heptene 8,9,10-trinorborn-2-ene Bicyclo[2.2.1]-2-heptene BICYCLO[2.2.1]HEPT-2-ENE bicyclo(2.2.1)hept-2-ene 3,6-Endomethylenecyclohexene (1R,4S)-bicyclo[2.2.1]hept-2-ene 6-Thio-uric Acid-13C3 SodiuM Dihydrate 2,8-Dihydroxy-6-Mercaptopurine-13C3 SodiuM Dihydrate |
| CAS | 498-66-8 |
| EINECS | 207-866-0 |
| InChI | InChI=1/C7H10/c1-2-7-4-3-6(1)5-7/h1-2,6-7H,3-5H2/t6-,7+ |
Norfenchene - Physico-chemical Properties
| Molecular Formula | C7H10 |
| Molar Mass | 94.15 |
| Density | 0.955 |
| Melting Point | 44-46 °C (lit.) |
| Boling Point | 96 °C (lit.) |
| Flash Point | 5°F |
| Water Solubility | Soluble in ethanol, ether and most organic solvents. Insoluble in water. |
| Vapor Presure | 30.06kPa at 59℃ |
| Appearance | Crystalline Mass |
| Specific Gravity | 0.85 |
| Color | White |
| Exposure Limit | ACGIH: TWA 20 ppmOSHA: Ceiling 300 ppm; TWA 200 ppmNIOSH: IDLH 500 ppm; TWA 100 ppm(375 mg/m3); STEL 150 ppm(560 mg/m3) |
| BRN | 1098544 |
| Storage Condition | Sealed in dry,Room Temperature |
| Sensitive | 4: no reaction with water under neutral conditions |
| Refractive Index | 1.4770 (estimate) |
Norfenchene - Risk and Safety
| Risk Codes | R11 - Highly Flammable R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36 - Irritating to the eyes |
| Safety Description | S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S29 - Do not empty into drains. S33 - Take precautionary measures against static discharges. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 1325 4.1/PG 2 |
| WGK Germany | 1 |
| RTECS | RB7900000 |
| FLUKA BRAND F CODES | 13 |
| TSCA | Yes |
| HS Code | 29021990 |
| Hazard Class | 4.1 |
| Packing Group | II |
Norfenchene - Reference Information
| LogP | 4.101 at 25℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | norbornene (NB) is a white transparent crystal at room temperature and is easy to sublimate. Norbornene (NB) is mainly used in the synthesis of cyclic olefin copolymer (COC). COC has the advantages of low density, low moisture absorption, high transparency, high heat resistance, high refractive index and excellent processability. It is an amorphous thermoplastic polymer material that has attracted great attention in the industry in recent years. |
| application | norbornene is an important comonomer, which can be used with ethylene, propylene, styrene and other α-olefins in Ziegler-Natta or Under the action of metallocene catalysts, cycloolefin copolymers are prepared by non-ring-opening polymerization. Cycloolefin copolymer has low density, low hygroscopicity, high transparency, high heat resistance, high refractive index and excellent processability. It is an amorphous thermoplastic polymer material that has attracted great attention in industry and academia in recent years. It has broad application prospects in the fields of optics, electronics, and pharmaceutical packaging. |
| preparation | a production method of norbornene. the method uses two series-connected first reactor and second reactor to crack dicyclopentadiene (DCPD) into cyclopentadiene (CPD), and cyclopentadiene (CPD) reacts with ethylene Diels-Alder to convert into norbornene (NB). 1) the prepared dicyclopentadiene (DCPD), solvent methyl isobutyl ketone (MIBK) and polymerization inhibitor (TBC) solution are continuously fed into the first kettle reactor from the bottom of the first kettle reactor by pump, and the required ethylene gas is introduced after stirring to dissolve ethylene in the solvent; The molar ratio of ethylene to dicyclopentadiene (DCPD) is 10~50:1, the weight ratio of solvent methyl isobutyl ketone (MIBK) to dicyclopentadiene (DCPD) is 0.5~2.0:1, the dosage of polymerization inhibitor p-tert-butylcatechol (TBC) is the 0.003% of dicyclopentadiene (DCPD) mass, the reaction temperature is 170~190 ℃, the ethylene consumed by the reaction is continuously supplemented by the ethylene compression machine, so that the system pressure is 7 ~ 11MPa, the residence time of the material in the reactor is 10~ 120 minutes, and it is continuously discharged into the second kettle reactor through the bottom of the second kettle reactor through the discharge port arranged on the side of the reactor. 2) In the second kettle reactor, the reaction temperature is 200~220 ℃, and the ethylene consumed by the reaction is continuously supplemented, so that the system pressure is 7 ~ 10MPa, the residence time of the material in the reactor is 10-80 minutes, and it is continuously discharged through the discharge port set on the side of the reactor , and the discharged reaction liquid is sent to the refining system for solvent methyl isobutyl ketone (MIBK) recovery and norbornene (NB) product refining, the solvent methyl isobutyl ketone (MIBK) is recycled, and the refined norbornene (NB) content is above 99.9 mass%. |
Last Update：2024-04-09 20:52:54
