Isobutylethene
4-Methyl-1-pentene
CAS: 691-37-2
Molecular Formula: C6H12
Isobutylethene - Names and Identifiers
| Name | 4-Methyl-1-pentene |
| Synonyms | l-iso-Hexene Isobutylethene 4-methyl-1-penten 4-Methylpentene-1 ixo-Butylethylene 4-METHYLPENTENE-1 4-Methyl-1-pentene 4-METHYL-1-PENTENE 1-Pentene,4-methyl- |
| CAS | 691-37-2 |
| EINECS | 211-720-1 |
| InChI | InChI=1/C6H12/c1-4-5-6(2)3/h4,6H,1,5H2,2-3H3 |
Isobutylethene - Physico-chemical Properties
| Molecular Formula | C6H12 |
| Molar Mass | 84.16 |
| Density | 0.665g/mLat 25°C(lit.) |
| Melting Point | -155 °C |
| Boling Point | 53-54°C(lit.) |
| Flash Point | −25°F |
| Water Solubility | Soluble in alcohol, benzene, chloroform, petroleum ether. Insoluble in water. |
| Solubility | Soluble in alcohol, benzene, chloroform, petroleum (Weast, 1986); miscible in pentene, hexane,and heptene. |
| Vapor Presure | 4.45 psi ( 20 °C) |
| Vapor Density | >1 (vs air) |
| Appearance | Liquid |
| Color | Colorless |
| BRN | 1731096 |
| Storage Condition | 0-6°C |
| Refractive Index | n20/D 1.382(lit.) |
| Physical and Chemical Properties | Colorless liquid. Melting Point -153.63 °c, boiling point 53.6-53.9 °c, relative density 0.6646(20/4 °c), refractive index 1.3825. Flash point -31 °c, insoluble in water. |
Isobutylethene - Risk and Safety
| Risk Codes | R11 - Highly Flammable R65 - Harmful: May cause lung damage if swallowed |
| 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. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN 3295 3/PG 2 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29012900 |
| Hazard Class | 3 |
| Packing Group | II |
Isobutylethene - Nature
Open Data Verified Data
TPX is the lowest density among all plastics to date, almost close to the theoretical limit of plastic density, with a relative density of only 0.83. TPX is an isotactic polymer with a relatively high crystallinity of about 40% to 65%. TPX has high transparency, refractive index of 1. 463, light transmittance of up to 90%, UV transmittance than glass and other transparent resin is more excellent; In the far infrared region of excellent optical properties. The permeability of TPX to water vapor and O2, N2 and other gases is 10 times that of PE, the equilibrium absorption rate is <0.05% (immersed in 20~60 ℃ water), and the water vapor transmission rate is log/m2 (38 ℃,90% RH), which may be caused by its low density structure.
- mechanical properties TPX has very high rigidity, the rigidity above 100 ℃ exceeds that of PP, the rigidity above 150 ℃ exceeds that of PC, and the notched impact strength of cantilever beam is larger than that of polyacrylate and PS, less than POM and nylon. The tensile creep properties of TPX are between PE and PP. The tensile yield strength of TPX is closely related to the strain rate and temperature. The higher the temperature, the lower the tensile yield strength. TPX had an elongation at break of 15% and a tensile modulus of 1448MPA at 20 °c. TPX was slowly burned and dripped, and the burning rate was 0.42cm/s.
- Thermal performance TPX has excellent thermal aging characteristics, with use time up to lOOh at 180 ℃, use time up to lOOOh at 150 ℃, and use up to 1 year at 125 ℃. The crystalline melting point of TPX is 235~240 ℃, the Vicat Softening Point is 179 ℃, the heat distortion temperature is 200 ℃ under 1. 86MPa stress, and the coefficient of linear expansion is 1-2 × lO-4 K-1. Thermal conductivity 1. 33 x lO-8W/(m.K). TPX was slowly burned and dripped, and the burning rate was 0.42cm/s.
- electrical properties TPX has excellent dielectric properties, and its electrical insulation is better than other polyolefins, which is comparable to PTFE and wire and cable grade PE. In a wide range of temperature and frequency, its dielectric constant remains stable, about 2. 12, dielectric loss tangent 0.00015, dielectric strength 28kV/mm, under the action of arc evaporation and carbonization.
- corrosion resistance TPX has good chemical corrosion resistance, and is similar to other Polyolefins. It is resistant to inorganic acids and bases even at 160 ° C., but is not resistant to oxidizing agents, aromatic hydrocarbons and Oxo hydrocarbons. The creep resistance of TPX is better than that of PP, and the environmental stress cracking resistance is similar to LDPE, and there is no tendency for other transparent plastics to crack due to detergent when used; No toxicity.
- The other TPX has poor resistance to ultraviolet radiation, is susceptible to degradation by oxidation and radiation, is yellow by heat, has low impact strength (normal temperature and low temperature), and has high air permeability, similar to PP. The above disadvantages can be compensated by copolymerization with other a-olefins and addition of additives. For outdoor applications, carbon black should be added as an ultraviolet absorber; The addition of 20% titanium dioxide can improve its thermal stability.
Last Update：2024-01-02 23:10:35
Isobutylethene - Preparation Method
Open Data Verified Data
with propylene as raw material, under the condition of 0.1 ~ lOMPa,38~204 ℃, using Ziegler catalyst, 4 methyl l pentene was prepared by propylene dimerization, which was refined by high efficiency distillation, A purity of 97 was obtained. 7% of the monomer, and then the monomer in the presence of Ziegler Natta catalyst, at or near atmospheric pressure and 30~60 deg C under the conditions of polymerization, A homopolymer of Poly 4-methyl -1-pentene was obtained with a monomer conversion of 85%. The polymer is esterified with alcohol, washed with water, neutralized, separated and recovered with solvent, and then dried and granulated. When copolymerized with a small amount of α-olefins such as 1-pentene, l-hexene, l-octene and l-Decene, various copolymers having excellent properties can be obtained.
Last Update：2022-01-01 11:07:39
Isobutylethene - Use
Open Data Verified Data
- Poly 4-methyl-l-pentene due to its excellent heat resistance, boiling water cooking resistance, transparency and non-toxic characteristics, it can be widely used as medical devices, such as syringes, three-way valves, blood separation tank, ultraviolet blood analysis tube slot, replacing quartz glass, etc.; Physical and chemical instruments, such as measuring cylinder, vessel, Beaker, etc. It can also be used in medicine and food packaging, such as milk containers, tableware, electronic ovens, food packaging films, etc.
- since poly4-methyl-1-pentene is excellent in transparency, it can be used as a transparent packaging material instead of a thermosetting resin. Can also be used as optical plastics, used in transportation and electrical industry, such as automobile lighting equipment, motor protective cover, sight mirror, electrical parts, high frequency electronic components.
- In addition, poly (4-methyl-1-pentene) can also be used as a release paper, a heat-resistant lens, and the like, and has many uses in aviation and aerospace.
Last Update：2022-01-01 11:07:40
Isobutylethene - Safety
Open Data Verified Data
The product is packaged into insulating film bags, and the outer packaging is polypropylene woven bags. The net weight of each bag is 25kg, and the net weight error is ± 0.2%. It can be stored in a clean and dry warehouse for a long time, and should be away from the fire source and heat source. Non-dangerous goods can be transported, transport tools should be kept clean and dry, not have nails and other sharp objects, to have a tarpaulin. It is strictly prohibited to use iron hooks for loading and unloading.
Last Update：2022-01-01 11:07:41
Isobutylethene - Molding Process
Open Data Verified Data
- Poly 4-methyl -1-pentene high melting point and low melt viscosity, can be used in injection molding, extrusion, blow molding and other molding process. Due to the narrow melting range of this polymer, special attention should be paid to the regulation of temperature during processing.
- in the injection molding process, since the relative density of poly (4-methyl-1-pentene) is low and the specific heat capacity is high, the primary injection volume and the plasticizing capacity reach 65% of the polystyrene, which is the optimal state. Molding temperature 270~280 ℃, Mold temperature 20~80 ℃, injection pressure 20 ~ 50MPa, molding shrinkage rate of 1.5% ~ 3.%.
- The Tube, film and wire coating can be extruded with a general extruder during extrusion molding. The length-to-diameter ratio of the screw is preferably greater than 20.
- The blow molding may be performed using a conventional blow molding apparatus. In addition, poly (4-methyl-1-pentene) may also be coated using conventional coating processes.
Last Update：2022-01-01 11:07:40
Isobutylethene - Reference Information
| Henry's Law Constant | 0.615 atm?m3/mol at 25 °C (Hine and Mookerjee, 1975) |
| LogP | 3.38 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | This product is a new synthetic material Poly (4-methyl-1-pentene) monomer, used as an intermediate in organic synthesis, methyl isobutyl ketone, 2-isobutyl-6-methylheptene and isopentanediene can be prepared. |
| production method | is derived from the dimerization of propylene. Propylene reacts with the metal to form an organic potassium compound, which acts as a catalyst in the dimerization reaction. The dimerization reaction proceeds under the conditions of 160 ° C. And about 6MPa, and the single-pass conversion of propylene is about 48%, and 4-methyl-1-pentene is obtained in a yield of about 78%. |
| autoignition temperature | 572 ° F. |
Last Update：2024-04-09 20:52:54
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Product Name: 4-Methyl-1-pentene Request for quotationCAS: 691-37-2
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Spot supply
Product Name: 4-Methyl-1-pentene Request for quotationCAS: 691-37-2
Tel: +86-17551318830
Email: r@reformchem.com
Mobile: +86-17551318830
QQ: 3787852685
Spot supply
Product Name: 4-Methyl-1-pentene Request for quotationCAS: 691-37-2
Tel: 17505222756
Email: pules.cn@gmail.com
Mobile: +86-17551318830
Wechat: 17505222756
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