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Donor C
- Product Description
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- Commodity name: Donor C
Ziegler-Natta Catalysis: This type of catalysis is widely used for producing polypropylene and other polyolefins. It involves a catalyst (often a titanium compound), a co-catalyst (like an aluminum alkyl), and an external donor.
Chemical Name:Donor C
Shape:White to off-white crystalline powder (may also be supplied as a solution in mineral oil)
Component:1.3.5-Trimethyl-2.4.6-tris(3.5-di-tert-butyl-4-hydroxybenzyl)benzene
Other names:
DIBP (Diisobutyl phthalate),Phthalate-based electron donor,Catalyst selectivity control agent
Molecular Formula:C₁₆H₂₂O₄ (for diisobutyl phthalate variant)
Molecular Weight: 278.34
CAS Number: 84-69-5
Application:
Ziegler-Natta Catalysis: This type of catalysis is widely used for producing polypropylene and other polyolefins. It involves a catalyst (often a titanium compound), a co-catalyst (like an aluminum alkyl), and an external donor.
Internal vs. External Donors: Internal donors are incorporated into the catalyst structure during its preparation, while external donors are added during the polymerization process.
Role of Electron Donors: Electron donors like "Donor C" can affect the stereoselectivity of the polymerization, influencing the arrangement of monomer units in the polymer chain. For example, they can promote the formation of isotactic polypropylene, where all methyl groups are on the same side of the polymer backbone.
Examples of Electron Donors: Common external donors include silanes, ethers, and esters. The specific compound used as "Donor C" would depend on the desired polymer properties and the specific catalyst system.
Impact on Polymer Properties: By controlling the polymer's microstructure, electron donors can affect its crystallinity, melting point, mechanical properties, and other key characteristics.
Commercial Applications: The ability to tailor polymer properties through the use of external donors makes them essential in the production of various polypropylene products, including packaging, fibers, and automotive parts.
Packing:
25 kg sealed foil bags (powder form)
200 kg steel drums (solution form)
Nitrogen-purged containers for sensitive grades
Storage:
Temperature: 10-25°C (controlled environment)
Humidity: <40% RH
Away from oxidizing agents
Limited shelf life (typically 6-12 months)
Keywords： Donor C
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