POLYBUTADIENE, AVERAGE M.N. CA. 3,000
Poly(butadiene)
CAS: 9003-17-2
Molecular Formula: C4H6
POLYBUTADIENE, AVERAGE M.N. CA. 3,000 - Names and Identifiers
POLYBUTADIENE, AVERAGE M.N. CA. 3,000 - Physico-chemical Properties
| Molecular Formula | C4H6 |
| Molar Mass | 54.09044 |
| Density | 0.9 g/mL at 25 °C (lit.) |
| Melting Point | −6°C |
| Flash Point | 113°C |
| Solubility | aliphatic hydrocarbons: soluble |
| Appearance | Slab |
| Color | Clear |
| Storage Condition | Store at R.T. |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | n20/D 1.524 |
| Use | For the production of tires, rubber pipes, tape, rubber shoes and other rubber products |
POLYBUTADIENE, AVERAGE M.N. CA. 3,000 - Risk and Safety
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| HS Code | 39029090 |
POLYBUTADIENE, AVERAGE M.N. CA. 3,000 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | the strength and elasticity of low cis-Polybutadiene Rubber is worse than that of natural rubber and high cis-Polybutadiene Rubber, but its cold resistance is particularly superior (Tg = 100 degrees C), which can be used for the preparation of cold resistant products. The elasticity of high cis-butyl rubber can exceed that of natural rubber, but it begins to harden below 40 ℃. Low cis-polybutadiene is light and transparent, easy to produce, low cost, but difficult to process, not easy to mix. High cis-Polybutadiene Rubber has good corrosion resistance and aging resistance, and can partially replace natural rubber to manufacture tires. |
| preparation | butadiene is polymerized in a hydrocarbon solvent at a temperature between 10 and 60 °c using organic lithium (such as n-butyl lithium) as a catalyst, the resulting polybutadiene contains about 40-60% of the cis-1, 4-structure, 5-10% of the 1,2-structure, and the remainder is the trans-1, 4 structure. This low cis-1, 4-polybutadiene obtained by the lithium-catalyzed process is simply referred to as a low cis-1, 4-polybutadiene (lithium) rubber. Butadiene can be polymerized with a complex catalyst to obtain a high degree of cis -1,4 structure (more than 92%) of polybutadiene, which is called high cis-Polybutadiene Rubber. Complex catalyst there are Ni-B-Al three-component complex catalyst; Co-Al two-component complex catalyst; Four iodine (or chlorine) titanium and three isobutyl aluminum two-component complex catalyst. The first two are soluble and the latter are insoluble. |
| Use | for the production of tires, rubber tubes, adhesive tapes, rubber shoes and other rubber products for the preparation of tires, rubber tubes, used for the preparation of water-soluble anodic electrophoretic paints, adhesives, thermosetting resins and for the modification of rubber and plastics |
| production method | prepared by directional polymerization of 1,3-butadiene in solution under the action of nickel catalyst: with butadiene as monomer, the boiling range of 60~90 ℃ raffinate oil as solvent, in the presence of nickel catalyst composed of nickel naphthenate, boron trifluoride diethyl ether complex and triisobutyl aluminum, the butadiene is subjected to stereoregular polymerization to produce a Polybutadiene Rubber having a high content of CIS 1,4-structure. The polymerization was carried out continuously in three reactors in series. The polymerization temperature was 65~98, and the polymerization time was 1.5~3H. After reaching a predetermined degree of polymerization, a terminating agent is added to terminate the polymerization to prepare a cis-butyl rubber latex, and then the colloidal particles are precipitated by water analysis and coagulation, and the unreacted butadiene and the solvent are subjected to distillation dehydration to remove light and weight impurities and then recycled. The water-containing rubber particles are washed, dehydrated by extrusion, and dried by expansion to obtain cis-Polybutadiene Rubber. The butadiene conversion was above 85%. Common catalysts include lithium-based, cobalt-based, titanium-based, nickel-based, and rare earth-based catalysts. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:52:54
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